/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/mult-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 16:09:51,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 16:09:51,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 16:09:51,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-18 16:09:51,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-18 16:09:51,971 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-18 16:09:51,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-18 16:09:51,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-18 16:09:51,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-18 16:09:51,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-18 16:09:51,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-18 16:09:51,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-01-18 16:09:52,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 16:09:52,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 16:09:52,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 16:09:52,031 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 16:09:52,055 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 16:09:52,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 16:09:52,056 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 16:09:52,057 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 16:09:52,058 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 16:09:52,058 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 16:09:52,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 16:09:52,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 16:09:52,058 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 16:09:52,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 16:09:52,059 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 16:09:52,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 16:09:52,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 16:09:52,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 16:09:52,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 16:09:52,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 16:09:52,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 16:09:52,061 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 16:09:52,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 16:09:52,061 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 16:09:52,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 16:09:52,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 16:09:52,061 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 16:09:52,062 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 16:09:52,063 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 16:09:52,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 16:09:52,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 16:09:52,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 16:09:52,063 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 16:09:52,064 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 16:09:52,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 16:09:52,064 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 16:09:52,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 16:09:52,064 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 16:09:52,064 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 16:09:52,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 16:09:52,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 16:09:52,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 16:09:52,307 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 16:09:52,308 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 16:09:52,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl [2022-01-18 16:09:52,309 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl' [2022-01-18 16:09:52,329 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 16:09:52,331 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 16:09:52,331 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 16:09:52,332 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 16:09:52,332 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 16:09:52,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:09:52" (1/1) ... [2022-01-18 16:09:52,347 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:09:52" (1/1) ... [2022-01-18 16:09:52,353 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 16:09:52,354 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 16:09:52,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 16:09:52,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 16:09:52,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 16:09:52,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:09:52" (1/1) ... [2022-01-18 16:09:52,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:09:52" (1/1) ... [2022-01-18 16:09:52,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:09:52" (1/1) ... [2022-01-18 16:09:52,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:09:52" (1/1) ... [2022-01-18 16:09:52,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:09:52" (1/1) ... [2022-01-18 16:09:52,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:09:52" (1/1) ... [2022-01-18 16:09:52,373 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:09:52" (1/1) ... [2022-01-18 16:09:52,375 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 16:09:52,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 16:09:52,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 16:09:52,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 16:09:52,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:09:52" (1/1) ... [2022-01-18 16:09:52,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 16:09:52,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:09:52,405 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 16:09:52,423 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 16:09:52,443 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 16:09:52,444 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 16:09:52,444 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 16:09:52,444 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 16:09:52,444 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 16:09:52,444 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 16:09:52,444 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 16:09:52,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 16:09:52,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 16:09:52,444 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 16:09:52,444 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 16:09:52,445 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 16:09:52,445 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 16:09:52,478 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 16:09:52,479 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 16:09:52,543 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 16:09:52,557 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 16:09:52,557 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 16:09:52,559 INFO L202 PluginConnector]: Adding new model mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:09:52 BoogieIcfgContainer [2022-01-18 16:09:52,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 16:09:52,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 16:09:52,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 16:09:52,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 16:09:52,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:09:52" (1/2) ... [2022-01-18 16:09:52,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b85c8d and model type mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 04:09:52, skipping insertion in model container [2022-01-18 16:09:52,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:09:52" (2/2) ... [2022-01-18 16:09:52,565 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-equiv.wvr.bpl [2022-01-18 16:09:52,569 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 16:09:52,569 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 16:09:52,569 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 16:09:52,569 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 16:09:52,598 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 16:09:52,645 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 16:09:52,650 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 16:09:52,650 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 16:09:52,658 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2022-01-18 16:09:52,699 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:52,701 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:52,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 16:09:52,722 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:09:52,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:09:52,723 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:09:52,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:09:52,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1698272252, now seen corresponding path program 1 times [2022-01-18 16:09:52,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:09:52,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141609588] [2022-01-18 16:09:52,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:09:52,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:09:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:09:52,873 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 16:09:52,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:09:52,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141609588] [2022-01-18 16:09:52,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141609588] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:09:52,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:09:52,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 16:09:52,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174862555] [2022-01-18 16:09:52,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:09:52,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 16:09:52,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:09:52,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 16:09:52,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:09:52,904 INFO L87 Difference]: Start difference. First operand has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:52,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:09:52,968 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2022-01-18 16:09:52,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 16:09:52,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 16:09:52,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:09:52,981 INFO L225 Difference]: With dead ends: 214 [2022-01-18 16:09:52,981 INFO L226 Difference]: Without dead ends: 199 [2022-01-18 16:09:52,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:09:52,985 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:09:52,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:09:52,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-18 16:09:53,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2022-01-18 16:09:53,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:53,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2022-01-18 16:09:53,055 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2022-01-18 16:09:53,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:09:53,056 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2022-01-18 16:09:53,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:53,057 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2022-01-18 16:09:53,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 16:09:53,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:09:53,059 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:09:53,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 16:09:53,059 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:09:53,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:09:53,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1717701342, now seen corresponding path program 1 times [2022-01-18 16:09:53,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:09:53,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353010071] [2022-01-18 16:09:53,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:09:53,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:09:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:09:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:09:53,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:09:53,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353010071] [2022-01-18 16:09:53,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353010071] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:09:53,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859844578] [2022-01-18 16:09:53,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:09:53,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:09:53,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:09:53,134 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 16:09:53,134 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 16:09:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:09:53,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 16:09:53,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:09:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:09:53,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:09:53,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:09:53,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859844578] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 16:09:53,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 16:09:53,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 7 [2022-01-18 16:09:53,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919628217] [2022-01-18 16:09:53,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:09:53,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:09:53,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:09:53,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:09:53,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-18 16:09:53,334 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:53,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:09:53,392 INFO L93 Difference]: Finished difference Result 284 states and 788 transitions. [2022-01-18 16:09:53,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 16:09:53,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 16:09:53,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:09:53,396 INFO L225 Difference]: With dead ends: 284 [2022-01-18 16:09:53,396 INFO L226 Difference]: Without dead ends: 284 [2022-01-18 16:09:53,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-18 16:09:53,398 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:09:53,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 26 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:09:53,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-18 16:09:53,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 176. [2022-01-18 16:09:53,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 3.0114285714285716) internal successors, (527), 175 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:53,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 527 transitions. [2022-01-18 16:09:53,419 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 527 transitions. Word has length 17 [2022-01-18 16:09:53,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:09:53,419 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 527 transitions. [2022-01-18 16:09:53,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:53,419 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 527 transitions. [2022-01-18 16:09:53,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 16:09:53,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:09:53,421 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:09:53,454 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 16:09:53,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:09:53,644 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:09:53,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:09:53,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1520327836, now seen corresponding path program 1 times [2022-01-18 16:09:53,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:09:53,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662671445] [2022-01-18 16:09:53,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:09:53,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:09:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:09:53,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:09:53,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:09:53,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662671445] [2022-01-18 16:09:53,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662671445] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:09:53,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:09:53,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 16:09:53,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640147422] [2022-01-18 16:09:53,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:09:53,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:09:53,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:09:53,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:09:53,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:09:53,684 INFO L87 Difference]: Start difference. First operand 176 states and 527 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:53,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:09:53,757 INFO L93 Difference]: Finished difference Result 240 states and 691 transitions. [2022-01-18 16:09:53,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 16:09:53,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 16:09:53,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:09:53,761 INFO L225 Difference]: With dead ends: 240 [2022-01-18 16:09:53,761 INFO L226 Difference]: Without dead ends: 240 [2022-01-18 16:09:53,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:09:53,765 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:09:53,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 19 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:09:53,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-18 16:09:53,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 191. [2022-01-18 16:09:53,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 3.0) internal successors, (570), 190 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:53,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 570 transitions. [2022-01-18 16:09:53,782 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 570 transitions. Word has length 17 [2022-01-18 16:09:53,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:09:53,782 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 570 transitions. [2022-01-18 16:09:53,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:53,782 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 570 transitions. [2022-01-18 16:09:53,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 16:09:53,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:09:53,789 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:09:53,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 16:09:53,789 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:09:53,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:09:53,790 INFO L85 PathProgramCache]: Analyzing trace with hash 721287832, now seen corresponding path program 2 times [2022-01-18 16:09:53,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:09:53,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873064645] [2022-01-18 16:09:53,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:09:53,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:09:53,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:09:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:09:53,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:09:53,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873064645] [2022-01-18 16:09:53,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873064645] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:09:53,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:09:53,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 16:09:53,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004637910] [2022-01-18 16:09:53,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:09:53,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 16:09:53,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:09:53,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 16:09:53,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:09:53,831 INFO L87 Difference]: Start difference. First operand 191 states and 570 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:53,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:09:53,882 INFO L93 Difference]: Finished difference Result 312 states and 867 transitions. [2022-01-18 16:09:53,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 16:09:53,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 16:09:53,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:09:53,884 INFO L225 Difference]: With dead ends: 312 [2022-01-18 16:09:53,885 INFO L226 Difference]: Without dead ends: 312 [2022-01-18 16:09:53,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:09:53,886 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:09:53,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 27 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:09:53,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-01-18 16:09:53,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 170. [2022-01-18 16:09:53,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.9763313609467454) internal successors, (503), 169 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:53,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 503 transitions. [2022-01-18 16:09:53,899 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 503 transitions. Word has length 17 [2022-01-18 16:09:53,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:09:53,899 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 503 transitions. [2022-01-18 16:09:53,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:53,900 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 503 transitions. [2022-01-18 16:09:53,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 16:09:53,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:09:53,901 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:09:53,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 16:09:53,902 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:09:53,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:09:53,902 INFO L85 PathProgramCache]: Analyzing trace with hash 388922714, now seen corresponding path program 1 times [2022-01-18 16:09:53,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:09:53,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976563372] [2022-01-18 16:09:53,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:09:53,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:09:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:09:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:09:53,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:09:53,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976563372] [2022-01-18 16:09:53,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976563372] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:09:53,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:09:53,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 16:09:53,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788300301] [2022-01-18 16:09:53,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:09:53,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:09:53,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:09:53,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:09:53,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:09:53,931 INFO L87 Difference]: Start difference. First operand 170 states and 503 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:53,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:09:53,984 INFO L93 Difference]: Finished difference Result 192 states and 530 transitions. [2022-01-18 16:09:53,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 16:09:53,984 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 16:09:53,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:09:53,986 INFO L225 Difference]: With dead ends: 192 [2022-01-18 16:09:53,986 INFO L226 Difference]: Without dead ends: 162 [2022-01-18 16:09:53,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:09:53,987 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:09:53,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 19 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:09:53,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-01-18 16:09:53,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 149. [2022-01-18 16:09:53,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.9324324324324325) internal successors, (434), 148 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:53,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 434 transitions. [2022-01-18 16:09:53,997 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 434 transitions. Word has length 17 [2022-01-18 16:09:53,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:09:53,997 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 434 transitions. [2022-01-18 16:09:53,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:53,997 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 434 transitions. [2022-01-18 16:09:53,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 16:09:53,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:09:53,999 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:09:53,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 16:09:53,999 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:09:53,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:09:54,000 INFO L85 PathProgramCache]: Analyzing trace with hash 336279062, now seen corresponding path program 2 times [2022-01-18 16:09:54,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:09:54,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853688545] [2022-01-18 16:09:54,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:09:54,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:09:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:09:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:09:54,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:09:54,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853688545] [2022-01-18 16:09:54,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853688545] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:09:54,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332821506] [2022-01-18 16:09:54,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:09:54,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:09:54,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:09:54,037 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 16:09:54,043 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 16:09:54,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:09:54,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:09:54,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 16:09:54,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:09:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:09:54,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:09:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:09:54,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332821506] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 16:09:54,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 16:09:54,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2022-01-18 16:09:54,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33604481] [2022-01-18 16:09:54,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:09:54,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:09:54,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:09:54,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:09:54,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-18 16:09:54,239 INFO L87 Difference]: Start difference. First operand 149 states and 434 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:54,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:09:54,284 INFO L93 Difference]: Finished difference Result 245 states and 688 transitions. [2022-01-18 16:09:54,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 16:09:54,284 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 16:09:54,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:09:54,286 INFO L225 Difference]: With dead ends: 245 [2022-01-18 16:09:54,286 INFO L226 Difference]: Without dead ends: 245 [2022-01-18 16:09:54,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-18 16:09:54,289 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:09:54,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 22 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:09:54,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-01-18 16:09:54,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 161. [2022-01-18 16:09:54,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.9375) internal successors, (470), 160 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:54,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 470 transitions. [2022-01-18 16:09:54,306 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 470 transitions. Word has length 17 [2022-01-18 16:09:54,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:09:54,307 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 470 transitions. [2022-01-18 16:09:54,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:54,307 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 470 transitions. [2022-01-18 16:09:54,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:09:54,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:09:54,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:09:54,333 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 16:09:54,527 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,SelfDestructingSolverStorable5 [2022-01-18 16:09:54,528 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:09:54,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:09:54,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1880409020, now seen corresponding path program 1 times [2022-01-18 16:09:54,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:09:54,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10395981] [2022-01-18 16:09:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:09:54,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:09:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:09:54,593 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 16:09:54,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:09:54,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10395981] [2022-01-18 16:09:54,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10395981] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:09:54,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589288737] [2022-01-18 16:09:54,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:09:54,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:09:54,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:09:54,595 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 16:09:54,596 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 16:09:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:09:54,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 16:09:54,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:09:54,668 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 16:09:54,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:09:54,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:09:54,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589288737] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:09:54,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:09:54,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-01-18 16:09:54,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276325958] [2022-01-18 16:09:54,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:09:54,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 16:09:54,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:09:54,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 16:09:54,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-18 16:09:54,742 INFO L87 Difference]: Start difference. First operand 161 states and 470 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:54,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:09:54,889 INFO L93 Difference]: Finished difference Result 404 states and 1123 transitions. [2022-01-18 16:09:54,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 16:09:54,890 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 16:09:54,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:09:54,892 INFO L225 Difference]: With dead ends: 404 [2022-01-18 16:09:54,893 INFO L226 Difference]: Without dead ends: 404 [2022-01-18 16:09:54,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2022-01-18 16:09:54,894 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:09:54,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 70 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:09:54,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-01-18 16:09:54,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 234. [2022-01-18 16:09:54,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.9871244635193133) internal successors, (696), 233 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:54,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 696 transitions. [2022-01-18 16:09:54,904 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 696 transitions. Word has length 19 [2022-01-18 16:09:54,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:09:54,904 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 696 transitions. [2022-01-18 16:09:54,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:54,905 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 696 transitions. [2022-01-18 16:09:54,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:09:54,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:09:54,906 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:09:54,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-18 16:09:55,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:09:55,112 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:09:55,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:09:55,112 INFO L85 PathProgramCache]: Analyzing trace with hash 34046910, now seen corresponding path program 1 times [2022-01-18 16:09:55,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:09:55,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133408990] [2022-01-18 16:09:55,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:09:55,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:09:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:09:55,218 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 16:09:55,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:09:55,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133408990] [2022-01-18 16:09:55,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133408990] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:09:55,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717179808] [2022-01-18 16:09:55,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:09:55,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:09:55,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:09:55,221 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 16:09:55,222 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 16:09:55,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:09:55,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 16:09:55,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:09:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:09:55,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:09:55,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:09:55,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717179808] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:09:55,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:09:55,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-18 16:09:55,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507778277] [2022-01-18 16:09:55,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:09:55,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 16:09:55,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:09:55,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 16:09:55,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:09:55,457 INFO L87 Difference]: Start difference. First operand 234 states and 696 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:55,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:09:55,595 INFO L93 Difference]: Finished difference Result 445 states and 1311 transitions. [2022-01-18 16:09:55,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 16:09:55,595 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 16:09:55,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:09:55,598 INFO L225 Difference]: With dead ends: 445 [2022-01-18 16:09:55,598 INFO L226 Difference]: Without dead ends: 412 [2022-01-18 16:09:55,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-01-18 16:09:55,599 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 41 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:09:55,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 158 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:09:55,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-01-18 16:09:55,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 328. [2022-01-18 16:09:55,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 3.0611620795107033) internal successors, (1001), 327 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:55,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 1001 transitions. [2022-01-18 16:09:55,611 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 1001 transitions. Word has length 19 [2022-01-18 16:09:55,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:09:55,611 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 1001 transitions. [2022-01-18 16:09:55,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:55,612 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 1001 transitions. [2022-01-18 16:09:55,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:09:55,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:09:55,613 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:09:55,642 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 16:09:55,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:09:55,842 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:09:55,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:09:55,842 INFO L85 PathProgramCache]: Analyzing trace with hash -846392150, now seen corresponding path program 2 times [2022-01-18 16:09:55,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:09:55,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438446153] [2022-01-18 16:09:55,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:09:55,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:09:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:09:55,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:09:55,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:09:55,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438446153] [2022-01-18 16:09:55,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438446153] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:09:55,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253049697] [2022-01-18 16:09:55,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:09:55,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:09:55,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:09:55,920 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 16:09:55,949 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 16:09:55,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:09:55,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:09:55,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 16:09:55,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:09:56,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:09:56,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:09:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:09:56,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253049697] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:09:56,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:09:56,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-01-18 16:09:56,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151088013] [2022-01-18 16:09:56,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:09:56,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 16:09:56,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:09:56,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 16:09:56,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-18 16:09:56,085 INFO L87 Difference]: Start difference. First operand 328 states and 1001 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:56,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:09:56,163 INFO L93 Difference]: Finished difference Result 646 states and 1931 transitions. [2022-01-18 16:09:56,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 16:09:56,163 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 16:09:56,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:09:56,167 INFO L225 Difference]: With dead ends: 646 [2022-01-18 16:09:56,167 INFO L226 Difference]: Without dead ends: 631 [2022-01-18 16:09:56,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-18 16:09:56,170 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 48 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:09:56,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 113 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:09:56,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-01-18 16:09:56,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 390. [2022-01-18 16:09:56,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.16452442159383) internal successors, (1231), 389 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:56,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1231 transitions. [2022-01-18 16:09:56,185 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1231 transitions. Word has length 19 [2022-01-18 16:09:56,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:09:56,187 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1231 transitions. [2022-01-18 16:09:56,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:56,187 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1231 transitions. [2022-01-18 16:09:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:09:56,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:09:56,188 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:09:56,215 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 16:09:56,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:09:56,411 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:09:56,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:09:56,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1555602956, now seen corresponding path program 3 times [2022-01-18 16:09:56,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:09:56,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999680469] [2022-01-18 16:09:56,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:09:56,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:09:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:09:56,501 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 16:09:56,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:09:56,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999680469] [2022-01-18 16:09:56,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999680469] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:09:56,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718168123] [2022-01-18 16:09:56,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:09:56,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:09:56,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:09:56,503 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 16:09:56,533 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 16:09:56,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 16:09:56,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:09:56,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 16:09:56,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:09:56,593 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 16:09:56,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:09:56,663 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 16:09:56,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718168123] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:09:56,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:09:56,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-18 16:09:56,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432561819] [2022-01-18 16:09:56,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:09:56,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 16:09:56,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:09:56,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 16:09:56,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:09:56,668 INFO L87 Difference]: Start difference. First operand 390 states and 1231 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:56,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:09:56,852 INFO L93 Difference]: Finished difference Result 816 states and 2463 transitions. [2022-01-18 16:09:56,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 16:09:56,853 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 16:09:56,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:09:56,857 INFO L225 Difference]: With dead ends: 816 [2022-01-18 16:09:56,857 INFO L226 Difference]: Without dead ends: 673 [2022-01-18 16:09:56,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-01-18 16:09:56,859 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 59 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:09:56,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 190 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:09:56,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-01-18 16:09:56,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 465. [2022-01-18 16:09:56,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.2349137931034484) internal successors, (1501), 464 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:56,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1501 transitions. [2022-01-18 16:09:56,877 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1501 transitions. Word has length 19 [2022-01-18 16:09:56,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:09:56,877 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 1501 transitions. [2022-01-18 16:09:56,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:56,878 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1501 transitions. [2022-01-18 16:09:56,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:09:56,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:09:56,880 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:09:56,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 16:09:57,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:09:57,094 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:09:57,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:09:57,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1118825264, now seen corresponding path program 2 times [2022-01-18 16:09:57,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:09:57,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990205411] [2022-01-18 16:09:57,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:09:57,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:09:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:09:57,129 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 16:09:57,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:09:57,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990205411] [2022-01-18 16:09:57,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990205411] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:09:57,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88005973] [2022-01-18 16:09:57,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:09:57,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:09:57,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:09:57,131 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 16:09:57,162 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 16:09:57,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:09:57,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:09:57,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 16:09:57,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:09:57,213 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 16:09:57,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:09:57,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:09:57,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88005973] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:09:57,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:09:57,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-18 16:09:57,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384493848] [2022-01-18 16:09:57,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:09:57,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 16:09:57,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:09:57,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 16:09:57,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-18 16:09:57,294 INFO L87 Difference]: Start difference. First operand 465 states and 1501 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:57,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:09:57,490 INFO L93 Difference]: Finished difference Result 1402 states and 4444 transitions. [2022-01-18 16:09:57,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 16:09:57,490 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 16:09:57,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:09:57,499 INFO L225 Difference]: With dead ends: 1402 [2022-01-18 16:09:57,499 INFO L226 Difference]: Without dead ends: 1402 [2022-01-18 16:09:57,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2022-01-18 16:09:57,500 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 88 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:09:57,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 71 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:09:57,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2022-01-18 16:09:57,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 797. [2022-01-18 16:09:57,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 3.4032663316582914) internal successors, (2709), 796 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:57,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2709 transitions. [2022-01-18 16:09:57,536 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2709 transitions. Word has length 19 [2022-01-18 16:09:57,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:09:57,536 INFO L470 AbstractCegarLoop]: Abstraction has 797 states and 2709 transitions. [2022-01-18 16:09:57,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:57,536 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2709 transitions. [2022-01-18 16:09:57,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:09:57,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:09:57,539 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:09:57,565 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 16:09:57,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:09:57,762 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:09:57,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:09:57,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1604629368, now seen corresponding path program 3 times [2022-01-18 16:09:57,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:09:57,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696630529] [2022-01-18 16:09:57,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:09:57,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:09:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:09:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:09:57,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:09:57,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696630529] [2022-01-18 16:09:57,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696630529] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:09:57,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490580333] [2022-01-18 16:09:57,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:09:57,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:09:57,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:09:57,800 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 16:09:57,801 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 16:09:57,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 16:09:57,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:09:57,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 16:09:57,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:09:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:09:57,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:09:57,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:09:57,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490580333] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:09:57,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:09:57,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-18 16:09:57,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999063162] [2022-01-18 16:09:57,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:09:57,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 16:09:57,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:09:57,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 16:09:57,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-18 16:09:57,933 INFO L87 Difference]: Start difference. First operand 797 states and 2709 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:58,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:09:58,058 INFO L93 Difference]: Finished difference Result 1152 states and 3746 transitions. [2022-01-18 16:09:58,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 16:09:58,058 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 16:09:58,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:09:58,065 INFO L225 Difference]: With dead ends: 1152 [2022-01-18 16:09:58,065 INFO L226 Difference]: Without dead ends: 1140 [2022-01-18 16:09:58,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2022-01-18 16:09:58,066 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 88 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:09:58,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 21 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:09:58,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-01-18 16:09:58,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 653. [2022-01-18 16:09:58,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 3.585889570552147) internal successors, (2338), 652 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:58,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 2338 transitions. [2022-01-18 16:09:58,089 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 2338 transitions. Word has length 19 [2022-01-18 16:09:58,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:09:58,090 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 2338 transitions. [2022-01-18 16:09:58,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:58,090 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 2338 transitions. [2022-01-18 16:09:58,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 16:09:58,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:09:58,093 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:09:58,117 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 16:09:58,315 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,SelfDestructingSolverStorable11 [2022-01-18 16:09:58,315 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:09:58,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:09:58,316 INFO L85 PathProgramCache]: Analyzing trace with hash -671302374, now seen corresponding path program 4 times [2022-01-18 16:09:58,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:09:58,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560237964] [2022-01-18 16:09:58,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:09:58,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:09:58,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:09:58,374 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 16:09:58,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:09:58,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560237964] [2022-01-18 16:09:58,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560237964] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:09:58,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733235564] [2022-01-18 16:09:58,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:09:58,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:09:58,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:09:58,376 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 16:09:58,412 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 16:09:58,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:09:58,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:09:58,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 16:09:58,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:09:58,488 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 16:09:58,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:09:58,557 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 16:09:58,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733235564] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:09:58,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:09:58,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-01-18 16:09:58,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871549161] [2022-01-18 16:09:58,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:09:58,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 16:09:58,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:09:58,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 16:09:58,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:09:58,558 INFO L87 Difference]: Start difference. First operand 653 states and 2338 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:58,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:09:58,654 INFO L93 Difference]: Finished difference Result 1011 states and 3340 transitions. [2022-01-18 16:09:58,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 16:09:58,654 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 16:09:58,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:09:58,660 INFO L225 Difference]: With dead ends: 1011 [2022-01-18 16:09:58,660 INFO L226 Difference]: Without dead ends: 990 [2022-01-18 16:09:58,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:09:58,661 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 57 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:09:58,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 170 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:09:58,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-01-18 16:09:58,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 730. [2022-01-18 16:09:58,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 3.5486968449931413) internal successors, (2587), 729 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:58,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2587 transitions. [2022-01-18 16:09:58,686 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2587 transitions. Word has length 21 [2022-01-18 16:09:58,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:09:58,686 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 2587 transitions. [2022-01-18 16:09:58,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:58,686 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2587 transitions. [2022-01-18 16:09:58,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 16:09:58,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:09:58,689 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:09:58,712 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 16:09:58,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 16:09:58,902 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:09:58,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:09:58,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1112056780, now seen corresponding path program 5 times [2022-01-18 16:09:58,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:09:58,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143383476] [2022-01-18 16:09:58,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:09:58,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:09:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:09:58,964 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 16:09:58,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:09:58,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143383476] [2022-01-18 16:09:58,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143383476] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:09:58,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031410069] [2022-01-18 16:09:58,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:09:58,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:09:58,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:09:58,966 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 16:09:58,968 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 16:09:58,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:09:58,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:09:58,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 16:09:58,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:09:59,054 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 16:09:59,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:09:59,152 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 16:09:59,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031410069] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:09:59,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:09:59,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-18 16:09:59,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010974266] [2022-01-18 16:09:59,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:09:59,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 16:09:59,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:09:59,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 16:09:59,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-18 16:09:59,155 INFO L87 Difference]: Start difference. First operand 730 states and 2587 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:59,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:09:59,276 INFO L93 Difference]: Finished difference Result 1051 states and 3509 transitions. [2022-01-18 16:09:59,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 16:09:59,277 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 16:09:59,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:09:59,283 INFO L225 Difference]: With dead ends: 1051 [2022-01-18 16:09:59,283 INFO L226 Difference]: Without dead ends: 1030 [2022-01-18 16:09:59,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 16:09:59,284 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 55 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:09:59,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 135 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:09:59,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2022-01-18 16:09:59,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 779. [2022-01-18 16:09:59,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 3.575835475578406) internal successors, (2782), 778 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:59,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2782 transitions. [2022-01-18 16:09:59,309 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2782 transitions. Word has length 21 [2022-01-18 16:09:59,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:09:59,309 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 2782 transitions. [2022-01-18 16:09:59,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:59,310 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2782 transitions. [2022-01-18 16:09:59,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 16:09:59,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:09:59,312 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:09:59,335 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 16:09:59,531 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,SelfDestructingSolverStorable13 [2022-01-18 16:09:59,531 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:09:59,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:09:59,532 INFO L85 PathProgramCache]: Analyzing trace with hash 190269072, now seen corresponding path program 6 times [2022-01-18 16:09:59,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:09:59,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672931026] [2022-01-18 16:09:59,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:09:59,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:09:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:09:59,607 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 16:09:59,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:09:59,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672931026] [2022-01-18 16:09:59,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672931026] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:09:59,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467757369] [2022-01-18 16:09:59,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:09:59,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:09:59,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:09:59,609 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 16:09:59,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:09:59,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:09:59,639 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 16:09:59,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 16:09:59,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:09:59,710 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 16:09:59,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:09:59,831 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 16:09:59,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467757369] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:09:59,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:09:59,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-01-18 16:09:59,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266292078] [2022-01-18 16:09:59,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:09:59,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 16:09:59,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:09:59,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 16:09:59,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-18 16:09:59,832 INFO L87 Difference]: Start difference. First operand 779 states and 2782 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:59,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:09:59,995 INFO L93 Difference]: Finished difference Result 912 states and 3156 transitions. [2022-01-18 16:09:59,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 16:09:59,996 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 16:09:59,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:00,001 INFO L225 Difference]: With dead ends: 912 [2022-01-18 16:10:00,001 INFO L226 Difference]: Without dead ends: 885 [2022-01-18 16:10:00,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-18 16:10:00,003 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 39 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:00,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 178 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:10:00,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2022-01-18 16:10:00,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 798. [2022-01-18 16:10:00,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.5809284818067755) internal successors, (2854), 797 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:00,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2854 transitions. [2022-01-18 16:10:00,049 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2854 transitions. Word has length 21 [2022-01-18 16:10:00,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:00,050 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 2854 transitions. [2022-01-18 16:10:00,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:00,050 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2854 transitions. [2022-01-18 16:10:00,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 16:10:00,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:00,052 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:10:00,080 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 16:10:00,263 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,SelfDestructingSolverStorable14 [2022-01-18 16:10:00,263 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:00,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:00,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1942186592, now seen corresponding path program 4 times [2022-01-18 16:10:00,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:00,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63339988] [2022-01-18 16:10:00,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:00,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:00,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:00,288 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 16:10:00,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:00,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63339988] [2022-01-18 16:10:00,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63339988] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:00,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787991010] [2022-01-18 16:10:00,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:10:00,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:00,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:00,290 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 16:10:00,291 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 16:10:00,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:10:00,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:00,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 16:10:00,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:00,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 16:10:00,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787991010] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:10:00,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-18 16:10:00,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-01-18 16:10:00,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988078937] [2022-01-18 16:10:00,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:10:00,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 16:10:00,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:00,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 16:10:00,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-18 16:10:00,357 INFO L87 Difference]: Start difference. First operand 798 states and 2854 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:00,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:00,433 INFO L93 Difference]: Finished difference Result 1037 states and 3469 transitions. [2022-01-18 16:10:00,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 16:10:00,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 16:10:00,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:00,437 INFO L225 Difference]: With dead ends: 1037 [2022-01-18 16:10:00,438 INFO L226 Difference]: Without dead ends: 1005 [2022-01-18 16:10:00,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:10:00,438 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:00,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 29 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:10:00,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-01-18 16:10:00,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 884. [2022-01-18 16:10:00,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.5130237825594564) internal successors, (3102), 883 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:00,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3102 transitions. [2022-01-18 16:10:00,463 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3102 transitions. Word has length 21 [2022-01-18 16:10:00,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:00,464 INFO L470 AbstractCegarLoop]: Abstraction has 884 states and 3102 transitions. [2022-01-18 16:10:00,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:00,464 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3102 transitions. [2022-01-18 16:10:00,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 16:10:00,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:00,466 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:10:00,493 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 16:10:00,688 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,SelfDestructingSolverStorable15 [2022-01-18 16:10:00,688 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:00,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:00,689 INFO L85 PathProgramCache]: Analyzing trace with hash 57075100, now seen corresponding path program 5 times [2022-01-18 16:10:00,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:00,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845755187] [2022-01-18 16:10:00,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:00,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:10:00,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:00,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845755187] [2022-01-18 16:10:00,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845755187] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:10:00,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:10:00,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 16:10:00,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102784986] [2022-01-18 16:10:00,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:10:00,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 16:10:00,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:00,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 16:10:00,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:10:00,729 INFO L87 Difference]: Start difference. First operand 884 states and 3102 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:00,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:00,767 INFO L93 Difference]: Finished difference Result 974 states and 3311 transitions. [2022-01-18 16:10:00,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 16:10:00,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 16:10:00,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:00,772 INFO L225 Difference]: With dead ends: 974 [2022-01-18 16:10:00,772 INFO L226 Difference]: Without dead ends: 926 [2022-01-18 16:10:00,772 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 16:10:00,773 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:00,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 51 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:10:00,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-01-18 16:10:00,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 830. [2022-01-18 16:10:00,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.525934861278649) internal successors, (2923), 829 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:00,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2923 transitions. [2022-01-18 16:10:00,794 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2923 transitions. Word has length 21 [2022-01-18 16:10:00,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:00,795 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 2923 transitions. [2022-01-18 16:10:00,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:00,795 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2923 transitions. [2022-01-18 16:10:00,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 16:10:00,797 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:00,797 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:10:00,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-18 16:10:00,797 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:00,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:00,798 INFO L85 PathProgramCache]: Analyzing trace with hash -369540448, now seen corresponding path program 6 times [2022-01-18 16:10:00,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:00,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561057532] [2022-01-18 16:10:00,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:00,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:00,818 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 16:10:00,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:00,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561057532] [2022-01-18 16:10:00,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561057532] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:00,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102053236] [2022-01-18 16:10:00,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:10:00,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:00,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:00,820 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 16:10:00,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 16:10:00,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:00,851 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 16:10:00,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 16:10:00,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:00,890 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 16:10:00,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:00,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102053236] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:00,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 16:10:00,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2022-01-18 16:10:00,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026392116] [2022-01-18 16:10:00,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:10:00,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 16:10:00,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:00,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 16:10:00,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 16:10:00,951 INFO L87 Difference]: Start difference. First operand 830 states and 2923 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:00,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:00,986 INFO L93 Difference]: Finished difference Result 870 states and 3033 transitions. [2022-01-18 16:10:00,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 16:10:00,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 16:10:00,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:00,990 INFO L225 Difference]: With dead ends: 870 [2022-01-18 16:10:00,991 INFO L226 Difference]: Without dead ends: 857 [2022-01-18 16:10:00,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 16:10:00,991 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:00,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 16 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:10:00,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-01-18 16:10:01,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 804. [2022-01-18 16:10:01,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.5454545454545454) internal successors, (2847), 803 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:01,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2847 transitions. [2022-01-18 16:10:01,012 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2847 transitions. Word has length 21 [2022-01-18 16:10:01,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:01,012 INFO L470 AbstractCegarLoop]: Abstraction has 804 states and 2847 transitions. [2022-01-18 16:10:01,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:01,012 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2847 transitions. [2022-01-18 16:10:01,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 16:10:01,015 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:01,015 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:10:01,040 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 16:10:01,228 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,SelfDestructingSolverStorable17 [2022-01-18 16:10:01,228 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:01,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:01,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1428493028, now seen corresponding path program 7 times [2022-01-18 16:10:01,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:01,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055461442] [2022-01-18 16:10:01,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:01,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:01,248 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 16:10:01,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:01,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055461442] [2022-01-18 16:10:01,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055461442] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:01,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246150571] [2022-01-18 16:10:01,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:10:01,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:01,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:01,250 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 16:10:01,255 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 16:10:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:01,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 16:10:01,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:01,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 16:10:01,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246150571] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:10:01,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-18 16:10:01,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-01-18 16:10:01,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017822548] [2022-01-18 16:10:01,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:10:01,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 16:10:01,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:01,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 16:10:01,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:10:01,335 INFO L87 Difference]: Start difference. First operand 804 states and 2847 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:01,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:01,418 INFO L93 Difference]: Finished difference Result 1221 states and 4056 transitions. [2022-01-18 16:10:01,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 16:10:01,418 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 16:10:01,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:01,424 INFO L225 Difference]: With dead ends: 1221 [2022-01-18 16:10:01,424 INFO L226 Difference]: Without dead ends: 1201 [2022-01-18 16:10:01,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-18 16:10:01,425 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:01,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 42 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:10:01,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2022-01-18 16:10:01,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 904. [2022-01-18 16:10:01,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.5957918050941307) internal successors, (3247), 903 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:01,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 3247 transitions. [2022-01-18 16:10:01,449 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 3247 transitions. Word has length 21 [2022-01-18 16:10:01,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:01,449 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 3247 transitions. [2022-01-18 16:10:01,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:01,449 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 3247 transitions. [2022-01-18 16:10:01,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 16:10:01,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:01,452 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:10:01,471 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 16:10:01,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:01,667 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:01,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:01,668 INFO L85 PathProgramCache]: Analyzing trace with hash -679790180, now seen corresponding path program 8 times [2022-01-18 16:10:01,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:01,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147347850] [2022-01-18 16:10:01,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:01,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:01,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:01,696 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 16:10:01,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:01,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147347850] [2022-01-18 16:10:01,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147347850] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:01,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138799585] [2022-01-18 16:10:01,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:10:01,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:01,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:01,697 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 16:10:01,698 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 16:10:01,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:10:01,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:01,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:10:01,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:01,784 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 16:10:01,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:01,880 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 16:10:01,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138799585] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:01,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:01,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2022-01-18 16:10:01,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414268977] [2022-01-18 16:10:01,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:01,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 16:10:01,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:01,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 16:10:01,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-01-18 16:10:01,882 INFO L87 Difference]: Start difference. First operand 904 states and 3247 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) 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 16:10:02,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:02,096 INFO L93 Difference]: Finished difference Result 1454 states and 4620 transitions. [2022-01-18 16:10:02,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 16:10:02,097 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 21 [2022-01-18 16:10:02,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:02,104 INFO L225 Difference]: With dead ends: 1454 [2022-01-18 16:10:02,104 INFO L226 Difference]: Without dead ends: 1412 [2022-01-18 16:10:02,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2022-01-18 16:10:02,105 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 139 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:02,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 118 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:10:02,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2022-01-18 16:10:02,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 920. [2022-01-18 16:10:02,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 3.5070729053318823) internal successors, (3223), 919 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:02,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 3223 transitions. [2022-01-18 16:10:02,132 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 3223 transitions. Word has length 21 [2022-01-18 16:10:02,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:02,132 INFO L470 AbstractCegarLoop]: Abstraction has 920 states and 3223 transitions. [2022-01-18 16:10:02,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 16:10:02,132 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 3223 transitions. [2022-01-18 16:10:02,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 16:10:02,134 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:02,135 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:10:02,159 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 16:10:02,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:02,357 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:02,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:02,357 INFO L85 PathProgramCache]: Analyzing trace with hash -849904168, now seen corresponding path program 9 times [2022-01-18 16:10:02,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:02,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974580978] [2022-01-18 16:10:02,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:02,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:02,410 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 16:10:02,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:02,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974580978] [2022-01-18 16:10:02,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974580978] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:02,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110935724] [2022-01-18 16:10:02,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:10:02,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:02,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:02,412 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 16:10:02,421 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 16:10:02,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:10:02,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:02,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:10:02,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:02,508 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 16:10:02,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:02,597 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 16:10:02,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110935724] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:02,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:02,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 11 [2022-01-18 16:10:02,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695782099] [2022-01-18 16:10:02,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:02,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 16:10:02,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:02,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 16:10:02,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-01-18 16:10:02,598 INFO L87 Difference]: Start difference. First operand 920 states and 3223 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:02,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:02,780 INFO L93 Difference]: Finished difference Result 1679 states and 5671 transitions. [2022-01-18 16:10:02,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 16:10:02,781 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 16:10:02,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:02,787 INFO L225 Difference]: With dead ends: 1679 [2022-01-18 16:10:02,787 INFO L226 Difference]: Without dead ends: 1653 [2022-01-18 16:10:02,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-01-18 16:10:02,788 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 88 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:02,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 46 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:10:02,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2022-01-18 16:10:02,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1158. [2022-01-18 16:10:02,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 3.5419187554019014) internal successors, (4098), 1157 states have internal predecessors, (4098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 4098 transitions. [2022-01-18 16:10:02,819 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 4098 transitions. Word has length 21 [2022-01-18 16:10:02,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:02,819 INFO L470 AbstractCegarLoop]: Abstraction has 1158 states and 4098 transitions. [2022-01-18 16:10:02,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:02,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 4098 transitions. [2022-01-18 16:10:02,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 16:10:02,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:02,823 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:10:02,852 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 16:10:03,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:03,035 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:03,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:03,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1595463124, now seen corresponding path program 10 times [2022-01-18 16:10:03,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:03,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434185078] [2022-01-18 16:10:03,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:03,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:03,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:03,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434185078] [2022-01-18 16:10:03,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434185078] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:03,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055123376] [2022-01-18 16:10:03,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:10:03,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:03,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:03,080 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 16:10:03,092 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 16:10:03,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:10:03,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:03,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:10:03,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:03,178 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 16:10:03,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:03,285 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 16:10:03,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055123376] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:03,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:03,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 11 [2022-01-18 16:10:03,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063323266] [2022-01-18 16:10:03,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:03,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 16:10:03,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:03,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 16:10:03,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-01-18 16:10:03,286 INFO L87 Difference]: Start difference. First operand 1158 states and 4098 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 16:10:03,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:03,501 INFO L93 Difference]: Finished difference Result 2209 states and 7293 transitions. [2022-01-18 16:10:03,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 16:10:03,501 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 21 [2022-01-18 16:10:03,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:03,508 INFO L225 Difference]: With dead ends: 2209 [2022-01-18 16:10:03,508 INFO L226 Difference]: Without dead ends: 2209 [2022-01-18 16:10:03,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2022-01-18 16:10:03,509 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 125 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:03,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 103 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:10:03,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2022-01-18 16:10:03,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 1285. [2022-01-18 16:10:03,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 3.5856697819314642) internal successors, (4604), 1284 states have internal predecessors, (4604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:03,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 4604 transitions. [2022-01-18 16:10:03,546 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 4604 transitions. Word has length 21 [2022-01-18 16:10:03,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:03,546 INFO L470 AbstractCegarLoop]: Abstraction has 1285 states and 4604 transitions. [2022-01-18 16:10:03,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 16:10:03,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 4604 transitions. [2022-01-18 16:10:03,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 16:10:03,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:03,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:10:03,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-01-18 16:10:03,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:03,771 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:03,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:03,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1594229548, now seen corresponding path program 11 times [2022-01-18 16:10:03,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:03,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541557247] [2022-01-18 16:10:03,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:03,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:03,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:03,799 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 16:10:03,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:03,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541557247] [2022-01-18 16:10:03,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541557247] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:03,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988139925] [2022-01-18 16:10:03,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:10:03,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:03,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:03,800 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 16:10:03,802 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 16:10:03,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:10:03,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:03,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:10:03,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:03,892 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 16:10:03,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:03,988 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 16:10:03,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988139925] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:03,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:03,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-01-18 16:10:03,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016715641] [2022-01-18 16:10:03,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:03,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 16:10:03,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:03,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 16:10:03,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-01-18 16:10:03,989 INFO L87 Difference]: Start difference. First operand 1285 states and 4604 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 16:10:04,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:04,253 INFO L93 Difference]: Finished difference Result 1613 states and 5504 transitions. [2022-01-18 16:10:04,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 16:10:04,253 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 21 [2022-01-18 16:10:04,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:04,258 INFO L225 Difference]: With dead ends: 1613 [2022-01-18 16:10:04,258 INFO L226 Difference]: Without dead ends: 1581 [2022-01-18 16:10:04,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:10:04,259 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 95 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:04,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 106 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:10:04,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2022-01-18 16:10:04,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1273. [2022-01-18 16:10:04,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1272 states have (on average 3.5550314465408803) internal successors, (4522), 1272 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:04,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 4522 transitions. [2022-01-18 16:10:04,291 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 4522 transitions. Word has length 21 [2022-01-18 16:10:04,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:04,292 INFO L470 AbstractCegarLoop]: Abstraction has 1273 states and 4522 transitions. [2022-01-18 16:10:04,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 16:10:04,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 4522 transitions. [2022-01-18 16:10:04,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 16:10:04,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:04,295 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:10:04,315 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 16:10:04,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:04,511 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:04,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:04,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1935867080, now seen corresponding path program 12 times [2022-01-18 16:10:04,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:04,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910464744] [2022-01-18 16:10:04,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:04,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:04,537 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 16:10:04,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:04,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910464744] [2022-01-18 16:10:04,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910464744] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:04,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882328797] [2022-01-18 16:10:04,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:10:04,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:04,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:04,539 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 16:10:04,541 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 16:10:04,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:10:04,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:04,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:10:04,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:04,635 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 16:10:04,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:04,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882328797] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:04,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:04,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-01-18 16:10:04,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615464720] [2022-01-18 16:10:04,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:04,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 16:10:04,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:04,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 16:10:04,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-01-18 16:10:04,737 INFO L87 Difference]: Start difference. First operand 1273 states and 4522 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 16:10:04,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:04,932 INFO L93 Difference]: Finished difference Result 2164 states and 7115 transitions. [2022-01-18 16:10:04,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 16:10:04,933 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 21 [2022-01-18 16:10:04,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:04,939 INFO L225 Difference]: With dead ends: 2164 [2022-01-18 16:10:04,939 INFO L226 Difference]: Without dead ends: 2156 [2022-01-18 16:10:04,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2022-01-18 16:10:04,940 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 164 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:04,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 108 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:10:04,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2022-01-18 16:10:04,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1534. [2022-01-18 16:10:04,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1533 states have (on average 3.5851272015655575) internal successors, (5496), 1533 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:04,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 5496 transitions. [2022-01-18 16:10:04,986 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 5496 transitions. Word has length 21 [2022-01-18 16:10:04,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:04,987 INFO L470 AbstractCegarLoop]: Abstraction has 1534 states and 5496 transitions. [2022-01-18 16:10:04,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 16:10:04,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 5496 transitions. [2022-01-18 16:10:04,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 16:10:04,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:04,991 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:10:05,017 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 16:10:05,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:05,215 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:05,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:05,215 INFO L85 PathProgramCache]: Analyzing trace with hash 524199368, now seen corresponding path program 13 times [2022-01-18 16:10:05,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:05,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027709008] [2022-01-18 16:10:05,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:05,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:05,253 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 16:10:05,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:05,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027709008] [2022-01-18 16:10:05,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027709008] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:05,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885189249] [2022-01-18 16:10:05,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:10:05,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:05,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:05,255 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 16:10:05,256 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 16:10:05,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:05,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:10:05,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:05,347 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 16:10:05,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:05,442 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 16:10:05,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885189249] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:05,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:05,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2022-01-18 16:10:05,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184741337] [2022-01-18 16:10:05,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:05,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 16:10:05,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:05,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 16:10:05,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-01-18 16:10:05,444 INFO L87 Difference]: Start difference. First operand 1534 states and 5496 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 16:10:05,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:05,722 INFO L93 Difference]: Finished difference Result 2841 states and 9935 transitions. [2022-01-18 16:10:05,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 16:10:05,722 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 21 [2022-01-18 16:10:05,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:05,730 INFO L225 Difference]: With dead ends: 2841 [2022-01-18 16:10:05,730 INFO L226 Difference]: Without dead ends: 2831 [2022-01-18 16:10:05,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:10:05,731 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 162 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:05,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 53 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:10:05,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2022-01-18 16:10:05,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 1813. [2022-01-18 16:10:05,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 3.587748344370861) internal successors, (6501), 1812 states have internal predecessors, (6501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:05,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 6501 transitions. [2022-01-18 16:10:05,781 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 6501 transitions. Word has length 21 [2022-01-18 16:10:05,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:05,782 INFO L470 AbstractCegarLoop]: Abstraction has 1813 states and 6501 transitions. [2022-01-18 16:10:05,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 16:10:05,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 6501 transitions. [2022-01-18 16:10:05,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 16:10:05,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:05,786 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:10:05,813 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 16:10:05,999 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,SelfDestructingSolverStorable24 [2022-01-18 16:10:05,999 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:06,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:06,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1808991432, now seen corresponding path program 14 times [2022-01-18 16:10:06,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:06,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299471365] [2022-01-18 16:10:06,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:06,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:06,028 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 16:10:06,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:06,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299471365] [2022-01-18 16:10:06,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299471365] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:06,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984430403] [2022-01-18 16:10:06,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:10:06,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:06,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:06,030 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 16:10:06,032 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 16:10:06,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:10:06,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:06,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:10:06,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:06,118 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 16:10:06,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:06,238 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 16:10:06,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984430403] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:06,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:06,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-01-18 16:10:06,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017055581] [2022-01-18 16:10:06,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:06,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 16:10:06,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:06,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 16:10:06,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-01-18 16:10:06,240 INFO L87 Difference]: Start difference. First operand 1813 states and 6501 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 16:10:06,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:06,485 INFO L93 Difference]: Finished difference Result 2259 states and 7725 transitions. [2022-01-18 16:10:06,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 16:10:06,485 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 21 [2022-01-18 16:10:06,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:06,492 INFO L225 Difference]: With dead ends: 2259 [2022-01-18 16:10:06,492 INFO L226 Difference]: Without dead ends: 2247 [2022-01-18 16:10:06,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=232, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:10:06,493 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 144 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:06,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 83 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:10:06,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2022-01-18 16:10:06,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 1809. [2022-01-18 16:10:06,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 3.587942477876106) internal successors, (6487), 1808 states have internal predecessors, (6487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:06,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6487 transitions. [2022-01-18 16:10:06,547 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6487 transitions. Word has length 21 [2022-01-18 16:10:06,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:06,547 INFO L470 AbstractCegarLoop]: Abstraction has 1809 states and 6487 transitions. [2022-01-18 16:10:06,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 16:10:06,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6487 transitions. [2022-01-18 16:10:06,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 16:10:06,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:06,552 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:10:06,576 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 16:10:06,767 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,SelfDestructingSolverStorable25 [2022-01-18 16:10:06,767 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:06,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:06,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1458153844, now seen corresponding path program 15 times [2022-01-18 16:10:06,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:06,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108089552] [2022-01-18 16:10:06,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:06,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:06,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:06,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:06,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108089552] [2022-01-18 16:10:06,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108089552] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:06,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235716661] [2022-01-18 16:10:06,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:10:06,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:06,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:06,801 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 16:10:06,806 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 16:10:06,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:10:06,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:06,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:10:06,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:06,887 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 16:10:06,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:06,980 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 16:10:06,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235716661] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:06,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:06,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 11 [2022-01-18 16:10:06,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346611906] [2022-01-18 16:10:06,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:06,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 16:10:06,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:06,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 16:10:06,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-01-18 16:10:06,981 INFO L87 Difference]: Start difference. First operand 1809 states and 6487 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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 16:10:07,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:07,236 INFO L93 Difference]: Finished difference Result 3116 states and 10468 transitions. [2022-01-18 16:10:07,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 16:10:07,237 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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 21 [2022-01-18 16:10:07,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:07,246 INFO L225 Difference]: With dead ends: 3116 [2022-01-18 16:10:07,246 INFO L226 Difference]: Without dead ends: 3116 [2022-01-18 16:10:07,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2022-01-18 16:10:07,247 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 119 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:07,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 161 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:10:07,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2022-01-18 16:10:07,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 1975. [2022-01-18 16:10:07,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1974 states have (on average 3.569908814589666) internal successors, (7047), 1974 states have internal predecessors, (7047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:07,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 7047 transitions. [2022-01-18 16:10:07,295 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 7047 transitions. Word has length 21 [2022-01-18 16:10:07,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:07,296 INFO L470 AbstractCegarLoop]: Abstraction has 1975 states and 7047 transitions. [2022-01-18 16:10:07,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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 16:10:07,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 7047 transitions. [2022-01-18 16:10:07,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 16:10:07,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:07,300 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:10:07,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-18 16:10:07,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 16:10:07,515 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:07,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:07,516 INFO L85 PathProgramCache]: Analyzing trace with hash -27282996, now seen corresponding path program 16 times [2022-01-18 16:10:07,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:07,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743111897] [2022-01-18 16:10:07,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:07,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:07,540 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 16:10:07,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:07,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743111897] [2022-01-18 16:10:07,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743111897] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:07,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752922060] [2022-01-18 16:10:07,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:10:07,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:07,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:07,542 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 16:10:07,543 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 16:10:07,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:10:07,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:07,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:10:07,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:07,613 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 16:10:07,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:07,703 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 16:10:07,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752922060] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:07,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:07,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2022-01-18 16:10:07,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194842448] [2022-01-18 16:10:07,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:07,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 16:10:07,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:07,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 16:10:07,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-01-18 16:10:07,705 INFO L87 Difference]: Start difference. First operand 1975 states and 7047 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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 16:10:07,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:07,929 INFO L93 Difference]: Finished difference Result 2407 states and 8257 transitions. [2022-01-18 16:10:07,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 16:10:07,929 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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 21 [2022-01-18 16:10:07,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:07,957 INFO L225 Difference]: With dead ends: 2407 [2022-01-18 16:10:07,958 INFO L226 Difference]: Without dead ends: 2361 [2022-01-18 16:10:07,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:10:07,958 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:07,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 73 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:10:07,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2022-01-18 16:10:07,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2032. [2022-01-18 16:10:07,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2031 states have (on average 3.539635647464303) internal successors, (7189), 2031 states have internal predecessors, (7189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:07,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 7189 transitions. [2022-01-18 16:10:07,999 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 7189 transitions. Word has length 21 [2022-01-18 16:10:07,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:07,999 INFO L470 AbstractCegarLoop]: Abstraction has 2032 states and 7189 transitions. [2022-01-18 16:10:07,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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 16:10:07,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 7189 transitions. [2022-01-18 16:10:08,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 16:10:08,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:08,004 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:10:08,029 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 16:10:08,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:08,219 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:08,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:08,220 INFO L85 PathProgramCache]: Analyzing trace with hash 263688078, now seen corresponding path program 7 times [2022-01-18 16:10:08,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:08,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849964268] [2022-01-18 16:10:08,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:08,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:08,276 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 16:10:08,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:08,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849964268] [2022-01-18 16:10:08,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849964268] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:08,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867546148] [2022-01-18 16:10:08,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:10:08,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:08,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:08,278 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 16:10:08,279 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 16:10:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:08,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 16:10:08,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:08,342 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 16:10:08,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:08,407 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 16:10:08,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867546148] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:08,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:08,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-18 16:10:08,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125280694] [2022-01-18 16:10:08,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:08,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 16:10:08,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:08,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 16:10:08,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-18 16:10:08,408 INFO L87 Difference]: Start difference. First operand 2032 states and 7189 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:08,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:08,547 INFO L93 Difference]: Finished difference Result 2352 states and 8100 transitions. [2022-01-18 16:10:08,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 16:10:08,547 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 16:10:08,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:08,552 INFO L225 Difference]: With dead ends: 2352 [2022-01-18 16:10:08,552 INFO L226 Difference]: Without dead ends: 2331 [2022-01-18 16:10:08,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 16:10:08,553 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 60 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:08,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 207 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:10:08,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2022-01-18 16:10:08,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2045. [2022-01-18 16:10:08,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 2044 states have (on average 3.5484344422700587) internal successors, (7253), 2044 states have internal predecessors, (7253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:08,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 7253 transitions. [2022-01-18 16:10:08,598 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 7253 transitions. Word has length 21 [2022-01-18 16:10:08,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:08,598 INFO L470 AbstractCegarLoop]: Abstraction has 2045 states and 7253 transitions. [2022-01-18 16:10:08,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:08,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 7253 transitions. [2022-01-18 16:10:08,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 16:10:08,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:08,603 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:10:08,629 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 16:10:08,821 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,SelfDestructingSolverStorable28 [2022-01-18 16:10:08,822 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:08,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:08,822 INFO L85 PathProgramCache]: Analyzing trace with hash -658099630, now seen corresponding path program 8 times [2022-01-18 16:10:08,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:08,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510766353] [2022-01-18 16:10:08,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:08,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:08,898 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 16:10:08,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:08,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510766353] [2022-01-18 16:10:08,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510766353] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:08,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454639984] [2022-01-18 16:10:08,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:10:08,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:08,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:08,900 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 16:10:08,900 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 16:10:08,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:10:08,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:08,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 16:10:08,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:08,980 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 16:10:08,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:09,076 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 16:10:09,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454639984] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:09,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:09,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-01-18 16:10:09,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077259053] [2022-01-18 16:10:09,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:09,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 16:10:09,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:09,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 16:10:09,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-18 16:10:09,078 INFO L87 Difference]: Start difference. First operand 2045 states and 7253 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:09,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:09,207 INFO L93 Difference]: Finished difference Result 2262 states and 7867 transitions. [2022-01-18 16:10:09,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 16:10:09,207 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 16:10:09,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:09,212 INFO L225 Difference]: With dead ends: 2262 [2022-01-18 16:10:09,212 INFO L226 Difference]: Without dead ends: 2241 [2022-01-18 16:10:09,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-01-18 16:10:09,213 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 58 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:09,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 189 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:10:09,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2022-01-18 16:10:09,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 2055. [2022-01-18 16:10:09,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.552093476144109) internal successors, (7296), 2054 states have internal predecessors, (7296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:09,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 7296 transitions. [2022-01-18 16:10:09,254 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 7296 transitions. Word has length 21 [2022-01-18 16:10:09,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:09,255 INFO L470 AbstractCegarLoop]: Abstraction has 2055 states and 7296 transitions. [2022-01-18 16:10:09,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:09,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 7296 transitions. [2022-01-18 16:10:09,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 16:10:09,259 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:09,260 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:10:09,277 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 16:10:09,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:09,467 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:09,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:09,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1826441102, now seen corresponding path program 9 times [2022-01-18 16:10:09,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:09,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983774730] [2022-01-18 16:10:09,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:09,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:09,555 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 16:10:09,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:09,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983774730] [2022-01-18 16:10:09,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983774730] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:09,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148174988] [2022-01-18 16:10:09,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:10:09,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:09,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:09,557 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 16:10:09,557 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 16:10:09,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:10:09,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:09,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 16:10:09,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:09,643 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 16:10:09,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:09,701 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 16:10:09,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148174988] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:09,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:09,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-01-18 16:10:09,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636104235] [2022-01-18 16:10:09,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:09,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 16:10:09,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:09,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 16:10:09,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-18 16:10:09,703 INFO L87 Difference]: Start difference. First operand 2055 states and 7296 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:09,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:09,859 INFO L93 Difference]: Finished difference Result 2335 states and 8077 transitions. [2022-01-18 16:10:09,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 16:10:09,859 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 16:10:09,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:09,865 INFO L225 Difference]: With dead ends: 2335 [2022-01-18 16:10:09,865 INFO L226 Difference]: Without dead ends: 2314 [2022-01-18 16:10:09,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-18 16:10:09,866 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 61 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:09,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 276 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:10:09,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-01-18 16:10:09,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2071. [2022-01-18 16:10:09,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2071 states, 2070 states have (on average 3.557487922705314) internal successors, (7364), 2070 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:09,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 7364 transitions. [2022-01-18 16:10:09,938 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 7364 transitions. Word has length 21 [2022-01-18 16:10:09,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:09,938 INFO L470 AbstractCegarLoop]: Abstraction has 2071 states and 7364 transitions. [2022-01-18 16:10:09,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:09,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 7364 transitions. [2022-01-18 16:10:09,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:10:09,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:09,943 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:10:09,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 16:10:10,159 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,SelfDestructingSolverStorable30 [2022-01-18 16:10:10,159 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:10,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:10,160 INFO L85 PathProgramCache]: Analyzing trace with hash 766837372, now seen corresponding path program 10 times [2022-01-18 16:10:10,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:10,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197152031] [2022-01-18 16:10:10,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:10,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:10,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:10,205 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 16:10:10,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:10,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197152031] [2022-01-18 16:10:10,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197152031] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:10,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559715759] [2022-01-18 16:10:10,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:10:10,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:10,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:10,206 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 16:10:10,208 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 16:10:10,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:10:10,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:10,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:10:10,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:10,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:10,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:10,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559715759] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:10,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:10,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-01-18 16:10:10,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939614091] [2022-01-18 16:10:10,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:10,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 16:10:10,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:10,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 16:10:10,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-01-18 16:10:10,370 INFO L87 Difference]: Start difference. First operand 2071 states and 7364 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 16:10:10,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:10,681 INFO L93 Difference]: Finished difference Result 8017 states and 28472 transitions. [2022-01-18 16:10:10,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 16:10:10,681 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 23 [2022-01-18 16:10:10,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:10,703 INFO L225 Difference]: With dead ends: 8017 [2022-01-18 16:10:10,703 INFO L226 Difference]: Without dead ends: 8017 [2022-01-18 16:10:10,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:10:10,705 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 192 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:10,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 104 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:10:10,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8017 states. [2022-01-18 16:10:10,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8017 to 4750. [2022-01-18 16:10:10,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4750 states, 4749 states have (on average 3.6249736786691935) internal successors, (17215), 4749 states have internal predecessors, (17215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:10,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4750 states to 4750 states and 17215 transitions. [2022-01-18 16:10:10,836 INFO L78 Accepts]: Start accepts. Automaton has 4750 states and 17215 transitions. Word has length 23 [2022-01-18 16:10:10,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:10,836 INFO L470 AbstractCegarLoop]: Abstraction has 4750 states and 17215 transitions. [2022-01-18 16:10:10,836 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 16:10:10,836 INFO L276 IsEmpty]: Start isEmpty. Operand 4750 states and 17215 transitions. [2022-01-18 16:10:10,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:10:10,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:10,847 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:10:10,862 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 16:10:11,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:11,047 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:11,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:11,048 INFO L85 PathProgramCache]: Analyzing trace with hash -439625992, now seen corresponding path program 11 times [2022-01-18 16:10:11,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:11,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95815895] [2022-01-18 16:10:11,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:11,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:11,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:11,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95815895] [2022-01-18 16:10:11,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95815895] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:11,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168824145] [2022-01-18 16:10:11,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:10:11,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:11,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:11,080 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 16:10:11,082 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 16:10:11,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:10:11,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:11,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:10:11,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:11,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:11,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168824145] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:11,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:11,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-01-18 16:10:11,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536555538] [2022-01-18 16:10:11,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:11,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 16:10:11,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:11,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 16:10:11,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-01-18 16:10:11,259 INFO L87 Difference]: Start difference. First operand 4750 states and 17215 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 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 16:10:11,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:11,519 INFO L93 Difference]: Finished difference Result 5512 states and 19596 transitions. [2022-01-18 16:10:11,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 16:10:11,519 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 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 23 [2022-01-18 16:10:11,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:11,531 INFO L225 Difference]: With dead ends: 5512 [2022-01-18 16:10:11,531 INFO L226 Difference]: Without dead ends: 5456 [2022-01-18 16:10:11,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2022-01-18 16:10:11,532 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 165 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:11,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 53 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:10:11,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5456 states. [2022-01-18 16:10:11,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5456 to 4829. [2022-01-18 16:10:11,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4829 states, 4828 states have (on average 3.6184755592377797) internal successors, (17470), 4828 states have internal predecessors, (17470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:11,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 17470 transitions. [2022-01-18 16:10:11,680 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 17470 transitions. Word has length 23 [2022-01-18 16:10:11,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:11,680 INFO L470 AbstractCegarLoop]: Abstraction has 4829 states and 17470 transitions. [2022-01-18 16:10:11,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 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 16:10:11,680 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 17470 transitions. [2022-01-18 16:10:11,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:10:11,691 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:11,691 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:10:11,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 16:10:11,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:11,914 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:11,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:11,915 INFO L85 PathProgramCache]: Analyzing trace with hash -630242892, now seen corresponding path program 12 times [2022-01-18 16:10:11,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:11,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898771928] [2022-01-18 16:10:11,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:11,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:11,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:11,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898771928] [2022-01-18 16:10:11,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898771928] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:11,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765456046] [2022-01-18 16:10:11,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:10:11,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:11,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:11,962 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 16:10:11,987 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 16:10:11,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:10:11,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:11,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:10:11,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:12,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:12,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765456046] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:12,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:12,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-01-18 16:10:12,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157691416] [2022-01-18 16:10:12,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:12,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 16:10:12,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:12,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 16:10:12,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-01-18 16:10:12,244 INFO L87 Difference]: Start difference. First operand 4829 states and 17470 transitions. Second operand has 16 states, 16 states have (on average 3.0625) 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 16:10:12,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:12,627 INFO L93 Difference]: Finished difference Result 7408 states and 25768 transitions. [2022-01-18 16:10:12,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 16:10:12,627 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) 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 23 [2022-01-18 16:10:12,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:12,643 INFO L225 Difference]: With dead ends: 7408 [2022-01-18 16:10:12,643 INFO L226 Difference]: Without dead ends: 7400 [2022-01-18 16:10:12,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2022-01-18 16:10:12,643 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 294 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:12,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 136 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:10:12,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7400 states. [2022-01-18 16:10:12,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7400 to 6112. [2022-01-18 16:10:12,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6112 states, 6111 states have (on average 3.6293568973981345) internal successors, (22179), 6111 states have internal predecessors, (22179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:12,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6112 states to 6112 states and 22179 transitions. [2022-01-18 16:10:12,770 INFO L78 Accepts]: Start accepts. Automaton has 6112 states and 22179 transitions. Word has length 23 [2022-01-18 16:10:12,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:12,771 INFO L470 AbstractCegarLoop]: Abstraction has 6112 states and 22179 transitions. [2022-01-18 16:10:12,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) 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 16:10:12,771 INFO L276 IsEmpty]: Start isEmpty. Operand 6112 states and 22179 transitions. [2022-01-18 16:10:12,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:10:12,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:12,784 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] [2022-01-18 16:10:12,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-18 16:10:13,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:13,006 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:13,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:13,006 INFO L85 PathProgramCache]: Analyzing trace with hash -2041910604, now seen corresponding path program 1 times [2022-01-18 16:10:13,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:13,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836028123] [2022-01-18 16:10:13,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:13,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:13,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:13,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:13,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836028123] [2022-01-18 16:10:13,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836028123] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:13,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375336337] [2022-01-18 16:10:13,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:13,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:13,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:13,052 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 16:10:13,054 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 16:10:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:13,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:10:13,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:13,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:13,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:13,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:13,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375336337] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:13,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:13,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-18 16:10:13,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40824280] [2022-01-18 16:10:13,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:13,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 16:10:13,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:13,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 16:10:13,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-01-18 16:10:13,292 INFO L87 Difference]: Start difference. First operand 6112 states and 22179 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 16:10:13,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:13,683 INFO L93 Difference]: Finished difference Result 14261 states and 51664 transitions. [2022-01-18 16:10:13,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 16:10:13,684 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 23 [2022-01-18 16:10:13,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:13,723 INFO L225 Difference]: With dead ends: 14261 [2022-01-18 16:10:13,723 INFO L226 Difference]: Without dead ends: 14255 [2022-01-18 16:10:13,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:10:13,724 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 222 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:13,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 70 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:10:13,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14255 states. [2022-01-18 16:10:13,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14255 to 11458. [2022-01-18 16:10:13,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11458 states, 11457 states have (on average 3.6823775857554333) internal successors, (42189), 11457 states have internal predecessors, (42189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:13,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11458 states to 11458 states and 42189 transitions. [2022-01-18 16:10:13,984 INFO L78 Accepts]: Start accepts. Automaton has 11458 states and 42189 transitions. Word has length 23 [2022-01-18 16:10:13,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:13,985 INFO L470 AbstractCegarLoop]: Abstraction has 11458 states and 42189 transitions. [2022-01-18 16:10:13,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 16:10:13,985 INFO L276 IsEmpty]: Start isEmpty. Operand 11458 states and 42189 transitions. [2022-01-18 16:10:14,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:10:14,011 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:14,011 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] [2022-01-18 16:10:14,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 16:10:14,227 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,SelfDestructingSolverStorable34 [2022-01-18 16:10:14,227 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:14,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:14,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1063353160, now seen corresponding path program 2 times [2022-01-18 16:10:14,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:14,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049577839] [2022-01-18 16:10:14,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:14,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:14,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:14,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049577839] [2022-01-18 16:10:14,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049577839] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:14,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808432943] [2022-01-18 16:10:14,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:10:14,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:14,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:14,272 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 16:10:14,277 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 16:10:14,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:10:14,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:14,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:10:14,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:14,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:14,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:14,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808432943] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:14,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:14,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-18 16:10:14,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057674356] [2022-01-18 16:10:14,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:14,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 16:10:14,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:14,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 16:10:14,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-01-18 16:10:14,487 INFO L87 Difference]: Start difference. First operand 11458 states and 42189 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 16:10:15,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:15,012 INFO L93 Difference]: Finished difference Result 23254 states and 84564 transitions. [2022-01-18 16:10:15,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 16:10:15,013 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 23 [2022-01-18 16:10:15,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:15,073 INFO L225 Difference]: With dead ends: 23254 [2022-01-18 16:10:15,073 INFO L226 Difference]: Without dead ends: 23254 [2022-01-18 16:10:15,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=357, Invalid=699, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 16:10:15,074 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 294 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:15,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 162 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:10:15,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23254 states. [2022-01-18 16:10:15,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23254 to 18401. [2022-01-18 16:10:15,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18401 states, 18400 states have (on average 3.7019021739130435) internal successors, (68115), 18400 states have internal predecessors, (68115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:15,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18401 states to 18401 states and 68115 transitions. [2022-01-18 16:10:15,603 INFO L78 Accepts]: Start accepts. Automaton has 18401 states and 68115 transitions. Word has length 23 [2022-01-18 16:10:15,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:15,603 INFO L470 AbstractCegarLoop]: Abstraction has 18401 states and 68115 transitions. [2022-01-18 16:10:15,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 16:10:15,604 INFO L276 IsEmpty]: Start isEmpty. Operand 18401 states and 68115 transitions. [2022-01-18 16:10:15,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:10:15,644 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:15,644 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:10:15,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 16:10:15,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 16:10:15,859 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:15,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:15,860 INFO L85 PathProgramCache]: Analyzing trace with hash -757118540, now seen corresponding path program 13 times [2022-01-18 16:10:15,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:15,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104214416] [2022-01-18 16:10:15,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:15,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:15,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:15,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104214416] [2022-01-18 16:10:15,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104214416] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:15,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810248401] [2022-01-18 16:10:15,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:10:15,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:15,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:15,895 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 16:10:15,896 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 16:10:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:15,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:10:15,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:15,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:16,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810248401] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:16,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:16,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-01-18 16:10:16,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515447469] [2022-01-18 16:10:16,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:16,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 16:10:16,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:16,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 16:10:16,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-01-18 16:10:16,107 INFO L87 Difference]: Start difference. First operand 18401 states and 68115 transitions. Second operand has 16 states, 16 states have (on average 3.0625) 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 16:10:16,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:16,600 INFO L93 Difference]: Finished difference Result 19801 states and 72677 transitions. [2022-01-18 16:10:16,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 16:10:16,600 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) 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 23 [2022-01-18 16:10:16,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:16,653 INFO L225 Difference]: With dead ends: 19801 [2022-01-18 16:10:16,654 INFO L226 Difference]: Without dead ends: 19781 [2022-01-18 16:10:16,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=281, Invalid=475, Unknown=0, NotChecked=0, Total=756 [2022-01-18 16:10:16,654 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 223 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:16,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 98 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:10:16,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19781 states. [2022-01-18 16:10:17,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19781 to 18392. [2022-01-18 16:10:17,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18392 states, 18391 states have (on average 3.7013756728834757) internal successors, (68072), 18391 states have internal predecessors, (68072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:17,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18392 states to 18392 states and 68072 transitions. [2022-01-18 16:10:17,406 INFO L78 Accepts]: Start accepts. Automaton has 18392 states and 68072 transitions. Word has length 23 [2022-01-18 16:10:17,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:17,406 INFO L470 AbstractCegarLoop]: Abstraction has 18392 states and 68072 transitions. [2022-01-18 16:10:17,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) 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 16:10:17,406 INFO L276 IsEmpty]: Start isEmpty. Operand 18392 states and 68072 transitions. [2022-01-18 16:10:17,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:10:17,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:17,432 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] [2022-01-18 16:10:17,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-01-18 16:10:17,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:17,633 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:17,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:17,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1151142540, now seen corresponding path program 3 times [2022-01-18 16:10:17,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:17,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044455381] [2022-01-18 16:10:17,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:17,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:17,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:17,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044455381] [2022-01-18 16:10:17,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044455381] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:17,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014772188] [2022-01-18 16:10:17,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:10:17,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:17,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:17,733 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 16:10:17,735 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 16:10:17,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:10:17,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:17,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:10:17,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:17,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:17,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014772188] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:17,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:17,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-01-18 16:10:17,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139413691] [2022-01-18 16:10:17,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:17,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 16:10:17,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:17,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 16:10:17,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-01-18 16:10:17,957 INFO L87 Difference]: Start difference. First operand 18392 states and 68072 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 16:10:18,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:18,575 INFO L93 Difference]: Finished difference Result 31050 states and 114087 transitions. [2022-01-18 16:10:18,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 16:10:18,575 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 23 [2022-01-18 16:10:18,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:18,687 INFO L225 Difference]: With dead ends: 31050 [2022-01-18 16:10:18,688 INFO L226 Difference]: Without dead ends: 31050 [2022-01-18 16:10:18,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:10:18,688 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 302 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:18,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 121 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:10:18,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31050 states. [2022-01-18 16:10:19,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31050 to 18487. [2022-01-18 16:10:19,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18487 states, 18486 states have (on average 3.6850589635399764) internal successors, (68122), 18486 states have internal predecessors, (68122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18487 states to 18487 states and 68122 transitions. [2022-01-18 16:10:19,324 INFO L78 Accepts]: Start accepts. Automaton has 18487 states and 68122 transitions. Word has length 23 [2022-01-18 16:10:19,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:19,325 INFO L470 AbstractCegarLoop]: Abstraction has 18487 states and 68122 transitions. [2022-01-18 16:10:19,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 16:10:19,325 INFO L276 IsEmpty]: Start isEmpty. Operand 18487 states and 68122 transitions. [2022-01-18 16:10:19,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:10:19,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:19,351 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:10:19,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-18 16:10:19,551 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,SelfDestructingSolverStorable37 [2022-01-18 16:10:19,552 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:19,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:19,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1701574328, now seen corresponding path program 14 times [2022-01-18 16:10:19,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:19,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966458613] [2022-01-18 16:10:19,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:19,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:19,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:19,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:19,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966458613] [2022-01-18 16:10:19,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966458613] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:19,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112902243] [2022-01-18 16:10:19,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:10:19,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:19,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:19,581 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 16:10:19,582 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 16:10:19,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:10:19,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:19,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:10:19,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:19,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:19,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:19,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112902243] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:19,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:19,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-01-18 16:10:19,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943035576] [2022-01-18 16:10:19,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:19,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 16:10:19,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:19,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 16:10:19,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-01-18 16:10:19,782 INFO L87 Difference]: Start difference. First operand 18487 states and 68122 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 16:10:20,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:20,260 INFO L93 Difference]: Finished difference Result 19677 states and 71789 transitions. [2022-01-18 16:10:20,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 16:10:20,261 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 23 [2022-01-18 16:10:20,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:20,441 INFO L225 Difference]: With dead ends: 19677 [2022-01-18 16:10:20,441 INFO L226 Difference]: Without dead ends: 19617 [2022-01-18 16:10:20,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=260, Invalid=442, Unknown=0, NotChecked=0, Total=702 [2022-01-18 16:10:20,442 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 247 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:20,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 75 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:10:20,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19617 states. [2022-01-18 16:10:20,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19617 to 18487. [2022-01-18 16:10:20,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18487 states, 18486 states have (on average 3.6806231742940603) internal successors, (68040), 18486 states have internal predecessors, (68040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:20,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18487 states to 18487 states and 68040 transitions. [2022-01-18 16:10:20,898 INFO L78 Accepts]: Start accepts. Automaton has 18487 states and 68040 transitions. Word has length 23 [2022-01-18 16:10:20,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:20,898 INFO L470 AbstractCegarLoop]: Abstraction has 18487 states and 68040 transitions. [2022-01-18 16:10:20,898 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 16:10:20,898 INFO L276 IsEmpty]: Start isEmpty. Operand 18487 states and 68040 transitions. [2022-01-18 16:10:20,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:10:20,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:20,942 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] [2022-01-18 16:10:20,967 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 16:10:21,165 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,SelfDestructingSolverStorable38 [2022-01-18 16:10:21,165 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:21,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:21,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1169726578, now seen corresponding path program 4 times [2022-01-18 16:10:21,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:21,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869148890] [2022-01-18 16:10:21,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:21,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:21,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:21,246 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 16:10:21,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:21,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869148890] [2022-01-18 16:10:21,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869148890] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:21,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653274267] [2022-01-18 16:10:21,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:10:21,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:21,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:21,252 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 16:10:21,254 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 16:10:21,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:10:21,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:21,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:10:21,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:21,433 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 16:10:21,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:21,841 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 16:10:21,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653274267] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:21,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:21,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 16:10:21,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591278322] [2022-01-18 16:10:21,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:21,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 16:10:21,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:21,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 16:10:21,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-01-18 16:10:21,842 INFO L87 Difference]: Start difference. First operand 18487 states and 68040 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 16:10:23,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:23,095 INFO L93 Difference]: Finished difference Result 26583 states and 95562 transitions. [2022-01-18 16:10:23,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 16:10:23,096 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 23 [2022-01-18 16:10:23,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:23,171 INFO L225 Difference]: With dead ends: 26583 [2022-01-18 16:10:23,171 INFO L226 Difference]: Without dead ends: 26479 [2022-01-18 16:10:23,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=391, Invalid=1415, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 16:10:23,172 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 285 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:23,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 211 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:10:23,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26479 states. [2022-01-18 16:10:23,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26479 to 19145. [2022-01-18 16:10:23,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19145 states, 19144 states have (on average 3.6745716673631423) internal successors, (70346), 19144 states have internal predecessors, (70346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:23,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19145 states to 19145 states and 70346 transitions. [2022-01-18 16:10:23,695 INFO L78 Accepts]: Start accepts. Automaton has 19145 states and 70346 transitions. Word has length 23 [2022-01-18 16:10:23,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:23,695 INFO L470 AbstractCegarLoop]: Abstraction has 19145 states and 70346 transitions. [2022-01-18 16:10:23,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 16:10:23,695 INFO L276 IsEmpty]: Start isEmpty. Operand 19145 states and 70346 transitions. [2022-01-18 16:10:23,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:10:23,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:23,728 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] [2022-01-18 16:10:23,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 16:10:23,928 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,SelfDestructingSolverStorable39 [2022-01-18 16:10:23,929 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:23,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:23,929 INFO L85 PathProgramCache]: Analyzing trace with hash -373032338, now seen corresponding path program 5 times [2022-01-18 16:10:23,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:23,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154452978] [2022-01-18 16:10:23,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:23,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:23,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:24,024 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 16:10:24,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:24,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154452978] [2022-01-18 16:10:24,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154452978] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:24,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579687638] [2022-01-18 16:10:24,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:10:24,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:24,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:24,026 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 16:10:24,034 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 16:10:24,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:10:24,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:24,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:10:24,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:24,227 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 16:10:24,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:24,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579687638] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:24,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:24,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 16:10:24,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514594215] [2022-01-18 16:10:24,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:24,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 16:10:24,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:24,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 16:10:24,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2022-01-18 16:10:24,637 INFO L87 Difference]: Start difference. First operand 19145 states and 70346 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:25,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:25,602 INFO L93 Difference]: Finished difference Result 20543 states and 74413 transitions. [2022-01-18 16:10:25,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 16:10:25,602 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 16:10:25,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:25,660 INFO L225 Difference]: With dead ends: 20543 [2022-01-18 16:10:25,660 INFO L226 Difference]: Without dead ends: 20495 [2022-01-18 16:10:25,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=328, Invalid=932, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:10:25,661 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 153 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:25,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 216 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 575 Invalid, 0 Unknown, 198 Unchecked, 0.3s Time] [2022-01-18 16:10:25,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20495 states. [2022-01-18 16:10:26,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20495 to 19199. [2022-01-18 16:10:26,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19199 states, 19198 states have (on average 3.672465881862694) internal successors, (70504), 19198 states have internal predecessors, (70504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:26,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19199 states to 19199 states and 70504 transitions. [2022-01-18 16:10:26,114 INFO L78 Accepts]: Start accepts. Automaton has 19199 states and 70504 transitions. Word has length 23 [2022-01-18 16:10:26,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:26,114 INFO L470 AbstractCegarLoop]: Abstraction has 19199 states and 70504 transitions. [2022-01-18 16:10:26,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:26,114 INFO L276 IsEmpty]: Start isEmpty. Operand 19199 states and 70504 transitions. [2022-01-18 16:10:26,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:10:26,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:26,144 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] [2022-01-18 16:10:26,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 16:10:26,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:26,345 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:26,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:26,345 INFO L85 PathProgramCache]: Analyzing trace with hash -454431394, now seen corresponding path program 6 times [2022-01-18 16:10:26,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:26,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908873157] [2022-01-18 16:10:26,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:26,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:26,435 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 16:10:26,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:26,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908873157] [2022-01-18 16:10:26,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908873157] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:26,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841063542] [2022-01-18 16:10:26,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:10:26,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:26,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:26,437 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 16:10:26,438 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 16:10:26,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:10:26,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:26,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:10:26,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:26,830 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 16:10:26,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:27,090 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 16:10:27,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841063542] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:27,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:27,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 16:10:27,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895245392] [2022-01-18 16:10:27,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:27,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 16:10:27,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:27,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 16:10:27,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-01-18 16:10:27,092 INFO L87 Difference]: Start difference. First operand 19199 states and 70504 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 16:10:29,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:29,027 INFO L93 Difference]: Finished difference Result 30752 states and 110074 transitions. [2022-01-18 16:10:29,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 16:10:29,027 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 23 [2022-01-18 16:10:29,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:29,132 INFO L225 Difference]: With dead ends: 30752 [2022-01-18 16:10:29,132 INFO L226 Difference]: Without dead ends: 30612 [2022-01-18 16:10:29,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=883, Invalid=2657, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 16:10:29,133 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 335 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:29,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 216 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:10:29,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30612 states. [2022-01-18 16:10:29,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30612 to 19275. [2022-01-18 16:10:29,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19275 states, 19274 states have (on average 3.6694510739856803) internal successors, (70725), 19274 states have internal predecessors, (70725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:29,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19275 states to 19275 states and 70725 transitions. [2022-01-18 16:10:29,703 INFO L78 Accepts]: Start accepts. Automaton has 19275 states and 70725 transitions. Word has length 23 [2022-01-18 16:10:29,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:29,703 INFO L470 AbstractCegarLoop]: Abstraction has 19275 states and 70725 transitions. [2022-01-18 16:10:29,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 16:10:29,703 INFO L276 IsEmpty]: Start isEmpty. Operand 19275 states and 70725 transitions. [2022-01-18 16:10:29,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:10:29,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:29,733 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] [2022-01-18 16:10:29,749 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 16:10:29,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:29,934 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:29,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:29,934 INFO L85 PathProgramCache]: Analyzing trace with hash -40815462, now seen corresponding path program 7 times [2022-01-18 16:10:29,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:29,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616950657] [2022-01-18 16:10:29,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:29,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:30,016 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 16:10:30,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:30,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616950657] [2022-01-18 16:10:30,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616950657] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:30,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985631104] [2022-01-18 16:10:30,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:10:30,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:30,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:30,018 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 16:10:30,019 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 16:10:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:30,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:10:30,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:30,259 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 16:10:30,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:30,595 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 16:10:30,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985631104] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:30,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:30,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 16:10:30,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500640934] [2022-01-18 16:10:30,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:30,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 16:10:30,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:30,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 16:10:30,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-01-18 16:10:30,597 INFO L87 Difference]: Start difference. First operand 19275 states and 70725 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:31,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:31,871 INFO L93 Difference]: Finished difference Result 26138 states and 93717 transitions. [2022-01-18 16:10:31,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 16:10:31,871 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 16:10:31,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:31,949 INFO L225 Difference]: With dead ends: 26138 [2022-01-18 16:10:31,949 INFO L226 Difference]: Without dead ends: 26054 [2022-01-18 16:10:31,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=577, Invalid=1775, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 16:10:31,950 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 347 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:31,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 145 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:10:31,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26054 states. [2022-01-18 16:10:32,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26054 to 19283. [2022-01-18 16:10:32,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19283 states, 19282 states have (on average 3.668395394668603) internal successors, (70734), 19282 states have internal predecessors, (70734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:32,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19283 states to 19283 states and 70734 transitions. [2022-01-18 16:10:32,455 INFO L78 Accepts]: Start accepts. Automaton has 19283 states and 70734 transitions. Word has length 23 [2022-01-18 16:10:32,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:32,456 INFO L470 AbstractCegarLoop]: Abstraction has 19283 states and 70734 transitions. [2022-01-18 16:10:32,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:32,456 INFO L276 IsEmpty]: Start isEmpty. Operand 19283 states and 70734 transitions. [2022-01-18 16:10:32,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:10:32,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:32,569 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] [2022-01-18 16:10:32,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 16:10:32,769 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,SelfDestructingSolverStorable42 [2022-01-18 16:10:32,770 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:32,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:32,770 INFO L85 PathProgramCache]: Analyzing trace with hash 18908732, now seen corresponding path program 8 times [2022-01-18 16:10:32,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:32,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448178905] [2022-01-18 16:10:32,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:32,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:32,855 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 16:10:32,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:32,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448178905] [2022-01-18 16:10:32,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448178905] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:32,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071010747] [2022-01-18 16:10:32,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:10:32,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:32,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:32,857 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 16:10:32,883 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 16:10:32,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:10:32,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:32,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:10:32,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:33,033 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 16:10:33,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:33,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071010747] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:33,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:33,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 16:10:33,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156843914] [2022-01-18 16:10:33,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:33,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 16:10:33,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:33,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 16:10:33,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-01-18 16:10:33,373 INFO L87 Difference]: Start difference. First operand 19283 states and 70734 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 16:10:34,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:34,192 INFO L93 Difference]: Finished difference Result 24943 states and 90273 transitions. [2022-01-18 16:10:34,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 16:10:34,193 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 23 [2022-01-18 16:10:34,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:34,284 INFO L225 Difference]: With dead ends: 24943 [2022-01-18 16:10:34,284 INFO L226 Difference]: Without dead ends: 24663 [2022-01-18 16:10:34,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=254, Invalid=802, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 16:10:34,284 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 172 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:34,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 156 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 568 Invalid, 0 Unknown, 177 Unchecked, 0.3s Time] [2022-01-18 16:10:34,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24663 states. [2022-01-18 16:10:34,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24663 to 19600. [2022-01-18 16:10:34,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19600 states, 19599 states have (on average 3.6688606561559265) internal successors, (71906), 19599 states have internal predecessors, (71906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:34,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19600 states to 19600 states and 71906 transitions. [2022-01-18 16:10:34,805 INFO L78 Accepts]: Start accepts. Automaton has 19600 states and 71906 transitions. Word has length 23 [2022-01-18 16:10:34,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:34,805 INFO L470 AbstractCegarLoop]: Abstraction has 19600 states and 71906 transitions. [2022-01-18 16:10:34,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 16:10:34,806 INFO L276 IsEmpty]: Start isEmpty. Operand 19600 states and 71906 transitions. [2022-01-18 16:10:34,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:10:34,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:34,838 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] [2022-01-18 16:10:34,853 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 16:10:35,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-01-18 16:10:35,038 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:35,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:35,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1523850184, now seen corresponding path program 9 times [2022-01-18 16:10:35,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:35,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063661478] [2022-01-18 16:10:35,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:35,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:35,193 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 16:10:35,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:35,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063661478] [2022-01-18 16:10:35,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063661478] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:35,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913604448] [2022-01-18 16:10:35,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:10:35,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:35,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:35,194 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 16:10:35,195 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 16:10:35,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 16:10:35,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:35,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:10:35,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:35,367 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 16:10:35,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:35,676 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 16:10:35,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913604448] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:35,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:35,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 16:10:35,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510328557] [2022-01-18 16:10:35,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:35,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 16:10:35,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:35,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 16:10:35,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-01-18 16:10:35,677 INFO L87 Difference]: Start difference. First operand 19600 states and 71906 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:36,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:36,413 INFO L93 Difference]: Finished difference Result 22433 states and 81186 transitions. [2022-01-18 16:10:36,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 16:10:36,413 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 16:10:36,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:36,476 INFO L225 Difference]: With dead ends: 22433 [2022-01-18 16:10:36,477 INFO L226 Difference]: Without dead ends: 22344 [2022-01-18 16:10:36,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:10:36,477 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 204 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:36,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 176 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 545 Invalid, 0 Unknown, 159 Unchecked, 0.3s Time] [2022-01-18 16:10:36,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22344 states. [2022-01-18 16:10:36,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22344 to 19686. [2022-01-18 16:10:36,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19686 states, 19685 states have (on average 3.6756413512827026) internal successors, (72355), 19685 states have internal predecessors, (72355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:36,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19686 states to 19686 states and 72355 transitions. [2022-01-18 16:10:36,953 INFO L78 Accepts]: Start accepts. Automaton has 19686 states and 72355 transitions. Word has length 23 [2022-01-18 16:10:36,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:36,953 INFO L470 AbstractCegarLoop]: Abstraction has 19686 states and 72355 transitions. [2022-01-18 16:10:36,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:36,953 INFO L276 IsEmpty]: Start isEmpty. Operand 19686 states and 72355 transitions. [2022-01-18 16:10:36,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:10:36,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:36,983 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] [2022-01-18 16:10:36,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-01-18 16:10:37,184 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,SelfDestructingSolverStorable44 [2022-01-18 16:10:37,184 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:37,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:37,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1508260856, now seen corresponding path program 10 times [2022-01-18 16:10:37,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:37,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491543874] [2022-01-18 16:10:37,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:37,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:37,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:37,284 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 16:10:37,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:37,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491543874] [2022-01-18 16:10:37,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491543874] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:37,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822760903] [2022-01-18 16:10:37,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:10:37,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:37,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:37,285 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 16:10:37,286 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 16:10:37,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:10:37,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:37,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:10:37,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:37,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:37,837 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 16:10:37,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822760903] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:37,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:37,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 16:10:37,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795639478] [2022-01-18 16:10:37,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:37,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 16:10:37,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:37,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 16:10:37,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-01-18 16:10:37,839 INFO L87 Difference]: Start difference. First operand 19686 states and 72355 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 16:10:38,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:38,546 INFO L93 Difference]: Finished difference Result 20917 states and 75946 transitions. [2022-01-18 16:10:38,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 16:10:38,547 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 23 [2022-01-18 16:10:38,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:38,616 INFO L225 Difference]: With dead ends: 20917 [2022-01-18 16:10:38,616 INFO L226 Difference]: Without dead ends: 20783 [2022-01-18 16:10:38,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:10:38,617 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 202 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:38,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 131 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 499 Invalid, 0 Unknown, 113 Unchecked, 0.3s Time] [2022-01-18 16:10:38,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20783 states. [2022-01-18 16:10:38,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20783 to 19749. [2022-01-18 16:10:39,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19749 states, 19748 states have (on average 3.675055701843225) internal successors, (72575), 19748 states have internal predecessors, (72575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:39,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19749 states to 19749 states and 72575 transitions. [2022-01-18 16:10:39,075 INFO L78 Accepts]: Start accepts. Automaton has 19749 states and 72575 transitions. Word has length 23 [2022-01-18 16:10:39,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:39,075 INFO L470 AbstractCegarLoop]: Abstraction has 19749 states and 72575 transitions. [2022-01-18 16:10:39,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 16:10:39,075 INFO L276 IsEmpty]: Start isEmpty. Operand 19749 states and 72575 transitions. [2022-01-18 16:10:39,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:10:39,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:39,106 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] [2022-01-18 16:10:39,122 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 16:10:39,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 16:10:39,307 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:39,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:39,307 INFO L85 PathProgramCache]: Analyzing trace with hash 449096986, now seen corresponding path program 11 times [2022-01-18 16:10:39,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:39,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624942736] [2022-01-18 16:10:39,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:39,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:39,425 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 16:10:39,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:39,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624942736] [2022-01-18 16:10:39,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624942736] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:39,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959485252] [2022-01-18 16:10:39,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:10:39,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:39,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:39,426 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 16:10:39,427 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 16:10:39,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:10:39,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:39,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:10:39,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:39,568 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 16:10:39,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:39,940 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 16:10:39,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959485252] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:39,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:39,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 16:10:39,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115187511] [2022-01-18 16:10:39,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:39,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:10:39,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:39,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:10:39,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:10:39,943 INFO L87 Difference]: Start difference. First operand 19749 states and 72575 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 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 16:10:40,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:40,653 INFO L93 Difference]: Finished difference Result 24592 states and 89552 transitions. [2022-01-18 16:10:40,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 16:10:40,660 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 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 23 [2022-01-18 16:10:40,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:40,736 INFO L225 Difference]: With dead ends: 24592 [2022-01-18 16:10:40,736 INFO L226 Difference]: Without dead ends: 24408 [2022-01-18 16:10:40,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:10:40,737 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 125 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:40,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 221 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 681 Invalid, 0 Unknown, 216 Unchecked, 0.3s Time] [2022-01-18 16:10:40,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24408 states. [2022-01-18 16:10:41,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24408 to 19744. [2022-01-18 16:10:41,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19744 states, 19743 states have (on average 3.6747708048422227) internal successors, (72551), 19743 states have internal predecessors, (72551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:41,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19744 states to 19744 states and 72551 transitions. [2022-01-18 16:10:41,184 INFO L78 Accepts]: Start accepts. Automaton has 19744 states and 72551 transitions. Word has length 23 [2022-01-18 16:10:41,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:41,185 INFO L470 AbstractCegarLoop]: Abstraction has 19744 states and 72551 transitions. [2022-01-18 16:10:41,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 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 16:10:41,185 INFO L276 IsEmpty]: Start isEmpty. Operand 19744 states and 72551 transitions. [2022-01-18 16:10:41,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:10:41,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:41,216 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] [2022-01-18 16:10:41,231 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 16:10:41,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:41,416 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:41,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:41,417 INFO L85 PathProgramCache]: Analyzing trace with hash 470852840, now seen corresponding path program 12 times [2022-01-18 16:10:41,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:41,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124242737] [2022-01-18 16:10:41,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:41,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:41,487 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 16:10:41,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:41,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124242737] [2022-01-18 16:10:41,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124242737] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:41,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854968524] [2022-01-18 16:10:41,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:10:41,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:41,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:41,489 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 16:10:41,491 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 16:10:41,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:10:41,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:41,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 16:10:41,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:41,584 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 16:10:41,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:41,814 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 16:10:41,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854968524] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:41,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:41,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-01-18 16:10:41,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891769428] [2022-01-18 16:10:41,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:41,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 16:10:41,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:41,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 16:10:41,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-01-18 16:10:41,815 INFO L87 Difference]: Start difference. First operand 19744 states and 72551 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 16:10:42,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:42,720 INFO L93 Difference]: Finished difference Result 26675 states and 95881 transitions. [2022-01-18 16:10:42,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 16:10:42,721 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 23 [2022-01-18 16:10:42,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:42,832 INFO L225 Difference]: With dead ends: 26675 [2022-01-18 16:10:42,832 INFO L226 Difference]: Without dead ends: 26613 [2022-01-18 16:10:42,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=416, Invalid=1476, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 16:10:42,833 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 305 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:42,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 210 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:10:42,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26613 states. [2022-01-18 16:10:43,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26613 to 20348. [2022-01-18 16:10:43,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20348 states, 20347 states have (on average 3.6653069248537866) internal successors, (74578), 20347 states have internal predecessors, (74578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:43,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20348 states to 20348 states and 74578 transitions. [2022-01-18 16:10:43,434 INFO L78 Accepts]: Start accepts. Automaton has 20348 states and 74578 transitions. Word has length 23 [2022-01-18 16:10:43,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:43,434 INFO L470 AbstractCegarLoop]: Abstraction has 20348 states and 74578 transitions. [2022-01-18 16:10:43,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 16:10:43,434 INFO L276 IsEmpty]: Start isEmpty. Operand 20348 states and 74578 transitions. [2022-01-18 16:10:43,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:10:43,469 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:43,469 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] [2022-01-18 16:10:43,485 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 16:10:43,670 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,SelfDestructingSolverStorable47 [2022-01-18 16:10:43,670 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:43,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:43,670 INFO L85 PathProgramCache]: Analyzing trace with hash 328283496, now seen corresponding path program 13 times [2022-01-18 16:10:43,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:43,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188432036] [2022-01-18 16:10:43,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:43,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:43,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:43,732 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 16:10:43,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:43,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188432036] [2022-01-18 16:10:43,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188432036] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:43,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479145383] [2022-01-18 16:10:43,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:10:43,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:43,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:43,734 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 16:10:43,736 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 16:10:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:43,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 16:10:43,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:43,852 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 16:10:43,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:44,101 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 16:10:44,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479145383] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:44,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:44,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2022-01-18 16:10:44,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153812827] [2022-01-18 16:10:44,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:44,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 16:10:44,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:44,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 16:10:44,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-01-18 16:10:44,102 INFO L87 Difference]: Start difference. First operand 20348 states and 74578 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) 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 16:10:45,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:45,739 INFO L93 Difference]: Finished difference Result 49018 states and 178154 transitions. [2022-01-18 16:10:45,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 16:10:45,739 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) 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 23 [2022-01-18 16:10:45,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:45,968 INFO L225 Difference]: With dead ends: 49018 [2022-01-18 16:10:45,968 INFO L226 Difference]: Without dead ends: 49000 [2022-01-18 16:10:45,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=914, Invalid=2746, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 16:10:45,970 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 468 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:45,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 227 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:10:46,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49000 states. [2022-01-18 16:10:46,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49000 to 29431. [2022-01-18 16:10:46,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29431 states, 29430 states have (on average 3.6643221202854233) internal successors, (107841), 29430 states have internal predecessors, (107841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29431 states to 29431 states and 107841 transitions. [2022-01-18 16:10:47,029 INFO L78 Accepts]: Start accepts. Automaton has 29431 states and 107841 transitions. Word has length 23 [2022-01-18 16:10:47,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:47,029 INFO L470 AbstractCegarLoop]: Abstraction has 29431 states and 107841 transitions. [2022-01-18 16:10:47,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) 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 16:10:47,029 INFO L276 IsEmpty]: Start isEmpty. Operand 29431 states and 107841 transitions. [2022-01-18 16:10:47,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:10:47,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:47,086 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] [2022-01-18 16:10:47,101 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 16:10:47,286 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,SelfDestructingSolverStorable48 [2022-01-18 16:10:47,286 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:47,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:47,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1368451066, now seen corresponding path program 14 times [2022-01-18 16:10:47,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:47,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751664266] [2022-01-18 16:10:47,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:47,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:47,360 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 16:10:47,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:47,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751664266] [2022-01-18 16:10:47,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751664266] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:47,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374089671] [2022-01-18 16:10:47,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:10:47,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:47,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:47,362 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 16:10:47,364 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 16:10:47,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:10:47,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:47,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 16:10:47,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:47,447 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 16:10:47,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:47,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374089671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:47,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:47,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2022-01-18 16:10:47,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367116510] [2022-01-18 16:10:47,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:47,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 16:10:47,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:47,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 16:10:47,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-01-18 16:10:47,672 INFO L87 Difference]: Start difference. First operand 29431 states and 107841 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 16:10:48,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:48,953 INFO L93 Difference]: Finished difference Result 40726 states and 147311 transitions. [2022-01-18 16:10:48,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 16:10:48,954 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 23 [2022-01-18 16:10:48,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:49,074 INFO L225 Difference]: With dead ends: 40726 [2022-01-18 16:10:49,074 INFO L226 Difference]: Without dead ends: 40718 [2022-01-18 16:10:49,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=655, Invalid=2101, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 16:10:49,075 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 353 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:49,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 286 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:10:49,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40718 states. [2022-01-18 16:10:49,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40718 to 29455. [2022-01-18 16:10:49,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29455 states, 29454 states have (on average 3.6647653968900658) internal successors, (107942), 29454 states have internal predecessors, (107942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29455 states to 29455 states and 107942 transitions. [2022-01-18 16:10:49,948 INFO L78 Accepts]: Start accepts. Automaton has 29455 states and 107942 transitions. Word has length 23 [2022-01-18 16:10:49,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:49,949 INFO L470 AbstractCegarLoop]: Abstraction has 29455 states and 107942 transitions. [2022-01-18 16:10:49,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 16:10:49,949 INFO L276 IsEmpty]: Start isEmpty. Operand 29455 states and 107942 transitions. [2022-01-18 16:10:49,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:10:49,997 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:49,997 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] [2022-01-18 16:10:50,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 16:10:50,197 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,SelfDestructingSolverStorable49 [2022-01-18 16:10:50,198 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:50,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:50,198 INFO L85 PathProgramCache]: Analyzing trace with hash 545416052, now seen corresponding path program 15 times [2022-01-18 16:10:50,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:50,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442949062] [2022-01-18 16:10:50,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:50,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:50,262 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 16:10:50,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:50,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442949062] [2022-01-18 16:10:50,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442949062] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:50,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870148109] [2022-01-18 16:10:50,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:10:50,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:50,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:50,264 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 16:10:50,287 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 16:10:50,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 16:10:50,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:50,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 16:10:50,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:50,463 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 16:10:50,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:50,651 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 16:10:50,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870148109] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:50,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:50,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2022-01-18 16:10:50,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332067103] [2022-01-18 16:10:50,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:50,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 16:10:50,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:50,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 16:10:50,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2022-01-18 16:10:50,652 INFO L87 Difference]: Start difference. First operand 29455 states and 107942 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) 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 16:10:51,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:51,968 INFO L93 Difference]: Finished difference Result 54419 states and 194123 transitions. [2022-01-18 16:10:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 16:10:51,968 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) 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 23 [2022-01-18 16:10:51,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:52,189 INFO L225 Difference]: With dead ends: 54419 [2022-01-18 16:10:52,190 INFO L226 Difference]: Without dead ends: 54419 [2022-01-18 16:10:52,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=963, Invalid=2343, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 16:10:52,191 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 407 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:52,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 190 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:10:52,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54419 states. [2022-01-18 16:10:53,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54419 to 31116. [2022-01-18 16:10:53,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31116 states, 31115 states have (on average 3.6714767796882533) internal successors, (114238), 31115 states have internal predecessors, (114238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:53,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31116 states to 31116 states and 114238 transitions. [2022-01-18 16:10:53,355 INFO L78 Accepts]: Start accepts. Automaton has 31116 states and 114238 transitions. Word has length 23 [2022-01-18 16:10:53,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:53,355 INFO L470 AbstractCegarLoop]: Abstraction has 31116 states and 114238 transitions. [2022-01-18 16:10:53,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) 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 16:10:53,355 INFO L276 IsEmpty]: Start isEmpty. Operand 31116 states and 114238 transitions. [2022-01-18 16:10:53,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:10:53,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:53,408 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] [2022-01-18 16:10:53,423 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 16:10:53,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:53,608 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:53,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:53,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1796586428, now seen corresponding path program 16 times [2022-01-18 16:10:53,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:53,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473992154] [2022-01-18 16:10:53,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:53,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:53,674 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 16:10:53,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:53,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473992154] [2022-01-18 16:10:53,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473992154] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:53,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087221747] [2022-01-18 16:10:53,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:10:53,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:53,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:53,675 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 16:10:53,677 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 16:10:53,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:10:53,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:53,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 16:10:53,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:53,786 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 16:10:53,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:54,103 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 16:10:54,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087221747] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:54,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:54,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2022-01-18 16:10:54,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559043149] [2022-01-18 16:10:54,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:54,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 16:10:54,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:54,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 16:10:54,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2022-01-18 16:10:54,104 INFO L87 Difference]: Start difference. First operand 31116 states and 114238 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) 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 16:10:55,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:55,872 INFO L93 Difference]: Finished difference Result 81071 states and 296560 transitions. [2022-01-18 16:10:55,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 16:10:55,873 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) 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 23 [2022-01-18 16:10:55,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:56,179 INFO L225 Difference]: With dead ends: 81071 [2022-01-18 16:10:56,179 INFO L226 Difference]: Without dead ends: 81043 [2022-01-18 16:10:56,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=980, Invalid=2560, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 16:10:56,180 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 540 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:56,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 203 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:10:56,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81043 states. [2022-01-18 16:10:57,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81043 to 48981. [2022-01-18 16:10:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48981 states, 48980 states have (on average 3.6829726418946507) internal successors, (180392), 48980 states have internal predecessors, (180392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:57,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48981 states to 48981 states and 180392 transitions. [2022-01-18 16:10:57,779 INFO L78 Accepts]: Start accepts. Automaton has 48981 states and 180392 transitions. Word has length 23 [2022-01-18 16:10:57,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:57,780 INFO L470 AbstractCegarLoop]: Abstraction has 48981 states and 180392 transitions. [2022-01-18 16:10:57,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) 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 16:10:57,780 INFO L276 IsEmpty]: Start isEmpty. Operand 48981 states and 180392 transitions. [2022-01-18 16:10:57,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:10:57,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:57,841 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] [2022-01-18 16:10:57,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 16:10:58,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:58,041 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:10:58,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:58,042 INFO L85 PathProgramCache]: Analyzing trace with hash 99851866, now seen corresponding path program 17 times [2022-01-18 16:10:58,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:58,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072912239] [2022-01-18 16:10:58,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:58,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:58,103 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 16:10:58,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:58,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072912239] [2022-01-18 16:10:58,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072912239] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:58,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028599200] [2022-01-18 16:10:58,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:10:58,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:58,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:58,105 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 16:10:58,106 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 16:10:58,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:10:58,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:58,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 16:10:58,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:58,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:58,379 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 16:10:58,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028599200] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:58,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:58,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2022-01-18 16:10:58,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717431045] [2022-01-18 16:10:58,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:58,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 16:10:58,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:58,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 16:10:58,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-01-18 16:10:58,380 INFO L87 Difference]: Start difference. First operand 48981 states and 180392 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 16:10:59,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:59,772 INFO L93 Difference]: Finished difference Result 69282 states and 253017 transitions. [2022-01-18 16:10:59,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 16:10:59,772 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 23 [2022-01-18 16:10:59,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:00,299 INFO L225 Difference]: With dead ends: 69282 [2022-01-18 16:11:00,299 INFO L226 Difference]: Without dead ends: 69262 [2022-01-18 16:11:00,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=656, Invalid=1696, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 16:11:00,300 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 305 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:00,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 252 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:11:00,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69262 states. [2022-01-18 16:11:01,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69262 to 48988. [2022-01-18 16:11:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48988 states, 48987 states have (on average 3.6832220793271686) internal successors, (180430), 48987 states have internal predecessors, (180430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:01,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48988 states to 48988 states and 180430 transitions. [2022-01-18 16:11:01,648 INFO L78 Accepts]: Start accepts. Automaton has 48988 states and 180430 transitions. Word has length 23 [2022-01-18 16:11:01,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:01,648 INFO L470 AbstractCegarLoop]: Abstraction has 48988 states and 180430 transitions. [2022-01-18 16:11:01,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 16:11:01,649 INFO L276 IsEmpty]: Start isEmpty. Operand 48988 states and 180430 transitions. [2022-01-18 16:11:01,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:11:01,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:01,705 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:01,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 16:11:01,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:01,905 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:11:01,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:01,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1945857750, now seen corresponding path program 15 times [2022-01-18 16:11:01,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:01,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661104314] [2022-01-18 16:11:01,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:01,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:01,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:01,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661104314] [2022-01-18 16:11:01,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661104314] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:01,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759073429] [2022-01-18 16:11:01,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:11:01,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:01,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:01,934 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 16:11:01,936 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 16:11:01,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:11:01,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:01,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:11:01,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:02,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:02,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759073429] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:02,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:02,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-01-18 16:11:02,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266169088] [2022-01-18 16:11:02,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:02,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 16:11:02,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:02,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 16:11:02,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-01-18 16:11:02,142 INFO L87 Difference]: Start difference. First operand 48988 states and 180430 transitions. Second operand has 16 states, 16 states have (on average 3.0625) 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 16:11:02,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:02,983 INFO L93 Difference]: Finished difference Result 51481 states and 188036 transitions. [2022-01-18 16:11:02,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 16:11:02,984 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) 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 23 [2022-01-18 16:11:02,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:03,178 INFO L225 Difference]: With dead ends: 51481 [2022-01-18 16:11:03,179 INFO L226 Difference]: Without dead ends: 51425 [2022-01-18 16:11:03,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=276, Invalid=536, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:11:03,179 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 280 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:03,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 132 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:11:03,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51425 states. [2022-01-18 16:11:04,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51425 to 49350. [2022-01-18 16:11:04,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49350 states, 49349 states have (on average 3.682404911953636) internal successors, (181723), 49349 states have internal predecessors, (181723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:04,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49350 states to 49350 states and 181723 transitions. [2022-01-18 16:11:04,584 INFO L78 Accepts]: Start accepts. Automaton has 49350 states and 181723 transitions. Word has length 23 [2022-01-18 16:11:04,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:04,584 INFO L470 AbstractCegarLoop]: Abstraction has 49350 states and 181723 transitions. [2022-01-18 16:11:04,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) 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 16:11:04,584 INFO L276 IsEmpty]: Start isEmpty. Operand 49350 states and 181723 transitions. [2022-01-18 16:11:04,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:11:04,644 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:04,644 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:04,659 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 16:11:04,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-01-18 16:11:04,845 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:11:04,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:04,845 INFO L85 PathProgramCache]: Analyzing trace with hash -2072733398, now seen corresponding path program 16 times [2022-01-18 16:11:04,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:04,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143967989] [2022-01-18 16:11:04,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:04,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:04,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:04,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143967989] [2022-01-18 16:11:04,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143967989] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:04,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702858144] [2022-01-18 16:11:04,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:11:04,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:04,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:04,882 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 16:11:04,883 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 16:11:04,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:11:04,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:04,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:11:04,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:04,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:05,126 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:05,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702858144] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:05,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:05,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-01-18 16:11:05,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397982731] [2022-01-18 16:11:05,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:05,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 16:11:05,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:05,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 16:11:05,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-01-18 16:11:05,127 INFO L87 Difference]: Start difference. First operand 49350 states and 181723 transitions. Second operand has 16 states, 16 states have (on average 3.0625) 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 16:11:06,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:06,068 INFO L93 Difference]: Finished difference Result 50955 states and 186662 transitions. [2022-01-18 16:11:06,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 16:11:06,068 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) 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 23 [2022-01-18 16:11:06,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:06,244 INFO L225 Difference]: With dead ends: 50955 [2022-01-18 16:11:06,244 INFO L226 Difference]: Without dead ends: 50937 [2022-01-18 16:11:06,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2022-01-18 16:11:06,245 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 192 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:06,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 130 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:11:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50937 states. [2022-01-18 16:11:07,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50937 to 49260. [2022-01-18 16:11:07,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49260 states, 49259 states have (on average 3.6830426927059015) internal successors, (181423), 49259 states have internal predecessors, (181423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:07,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49260 states to 49260 states and 181423 transitions. [2022-01-18 16:11:07,675 INFO L78 Accepts]: Start accepts. Automaton has 49260 states and 181423 transitions. Word has length 23 [2022-01-18 16:11:07,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:07,675 INFO L470 AbstractCegarLoop]: Abstraction has 49260 states and 181423 transitions. [2022-01-18 16:11:07,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) 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 16:11:07,675 INFO L276 IsEmpty]: Start isEmpty. Operand 49260 states and 181423 transitions. [2022-01-18 16:11:07,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:11:07,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:07,751 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:07,766 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 16:11:07,951 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,SelfDestructingSolverStorable54 [2022-01-18 16:11:07,951 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:11:07,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:07,952 INFO L85 PathProgramCache]: Analyzing trace with hash 385959470, now seen corresponding path program 17 times [2022-01-18 16:11:07,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:07,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682504398] [2022-01-18 16:11:07,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:07,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:07,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:07,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682504398] [2022-01-18 16:11:07,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682504398] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:07,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832458220] [2022-01-18 16:11:07,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:11:07,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:07,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:07,983 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 16:11:07,984 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 16:11:08,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:11:08,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:08,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:11:08,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:08,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:08,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:08,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832458220] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:08,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:08,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-01-18 16:11:08,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463507831] [2022-01-18 16:11:08,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:08,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 16:11:08,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:08,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 16:11:08,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-18 16:11:08,241 INFO L87 Difference]: Start difference. First operand 49260 states and 181423 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 16:11:08,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:08,853 INFO L93 Difference]: Finished difference Result 50587 states and 185637 transitions. [2022-01-18 16:11:08,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 16:11:08,854 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 23 [2022-01-18 16:11:08,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:09,332 INFO L225 Difference]: With dead ends: 50587 [2022-01-18 16:11:09,332 INFO L226 Difference]: Without dead ends: 50502 [2022-01-18 16:11:09,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=457, Unknown=0, NotChecked=0, Total=702 [2022-01-18 16:11:09,333 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 168 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:09,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 73 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:11:09,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50502 states. [2022-01-18 16:11:10,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50502 to 49092. [2022-01-18 16:11:10,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49092 states, 49091 states have (on average 3.684870953942678) internal successors, (180894), 49091 states have internal predecessors, (180894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:10,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49092 states to 49092 states and 180894 transitions. [2022-01-18 16:11:10,469 INFO L78 Accepts]: Start accepts. Automaton has 49092 states and 180894 transitions. Word has length 23 [2022-01-18 16:11:10,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:10,469 INFO L470 AbstractCegarLoop]: Abstraction has 49092 states and 180894 transitions. [2022-01-18 16:11:10,469 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 16:11:10,470 INFO L276 IsEmpty]: Start isEmpty. Operand 49092 states and 180894 transitions. [2022-01-18 16:11:10,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:11:10,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:10,538 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:10,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-18 16:11:10,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-18 16:11:10,739 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:11:10,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:10,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1274385134, now seen corresponding path program 18 times [2022-01-18 16:11:10,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:10,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644446439] [2022-01-18 16:11:10,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:10,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:10,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:10,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644446439] [2022-01-18 16:11:10,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644446439] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:10,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331674435] [2022-01-18 16:11:10,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:11:10,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:10,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:10,768 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 16:11:10,769 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 16:11:10,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:11:10,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:10,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:11:10,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:10,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:10,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331674435] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:10,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:10,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-01-18 16:11:10,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667610129] [2022-01-18 16:11:10,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:10,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 16:11:10,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:10,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 16:11:10,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-01-18 16:11:10,982 INFO L87 Difference]: Start difference. First operand 49092 states and 180894 transitions. Second operand has 16 states, 16 states have (on average 3.0625) 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 16:11:11,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:11,927 INFO L93 Difference]: Finished difference Result 51022 states and 186831 transitions. [2022-01-18 16:11:11,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 16:11:11,928 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) 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 23 [2022-01-18 16:11:11,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:12,089 INFO L225 Difference]: With dead ends: 51022 [2022-01-18 16:11:12,089 INFO L226 Difference]: Without dead ends: 50982 [2022-01-18 16:11:12,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:11:12,090 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 167 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:12,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 145 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:11:12,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50982 states. [2022-01-18 16:11:13,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50982 to 49178. [2022-01-18 16:11:13,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49178 states, 49177 states have (on average 3.6849340138682716) internal successors, (181214), 49177 states have internal predecessors, (181214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:13,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49178 states to 49178 states and 181214 transitions. [2022-01-18 16:11:13,441 INFO L78 Accepts]: Start accepts. Automaton has 49178 states and 181214 transitions. Word has length 23 [2022-01-18 16:11:13,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:13,441 INFO L470 AbstractCegarLoop]: Abstraction has 49178 states and 181214 transitions. [2022-01-18 16:11:13,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) 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 16:11:13,441 INFO L276 IsEmpty]: Start isEmpty. Operand 49178 states and 181214 transitions. [2022-01-18 16:11:13,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:11:13,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:13,510 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:13,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-01-18 16:11:13,710 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,SelfDestructingSolverStorable56 [2022-01-18 16:11:13,710 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:11:13,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:13,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1147509486, now seen corresponding path program 19 times [2022-01-18 16:11:13,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:13,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642631576] [2022-01-18 16:11:13,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:13,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:13,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:13,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642631576] [2022-01-18 16:11:13,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642631576] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:13,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341422681] [2022-01-18 16:11:13,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:11:13,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:13,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:13,739 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 16:11:13,763 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 16:11:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:13,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:11:13,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:13,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:14,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:14,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341422681] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:14,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:14,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-01-18 16:11:14,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749359111] [2022-01-18 16:11:14,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:14,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 16:11:14,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:14,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 16:11:14,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2022-01-18 16:11:14,279 INFO L87 Difference]: Start difference. First operand 49178 states and 181214 transitions. Second operand has 16 states, 16 states have (on average 3.0625) 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 16:11:14,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:14,854 INFO L93 Difference]: Finished difference Result 50540 states and 185579 transitions. [2022-01-18 16:11:14,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 16:11:14,854 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) 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 23 [2022-01-18 16:11:14,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:15,016 INFO L225 Difference]: With dead ends: 50540 [2022-01-18 16:11:15,016 INFO L226 Difference]: Without dead ends: 50527 [2022-01-18 16:11:15,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2022-01-18 16:11:15,017 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 129 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:15,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 83 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:11:15,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50527 states. [2022-01-18 16:11:16,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50527 to 49172. [2022-01-18 16:11:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49172 states, 49171 states have (on average 3.6848142197636817) internal successors, (181186), 49171 states have internal predecessors, (181186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:16,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49172 states to 49172 states and 181186 transitions. [2022-01-18 16:11:16,247 INFO L78 Accepts]: Start accepts. Automaton has 49172 states and 181186 transitions. Word has length 23 [2022-01-18 16:11:16,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:16,247 INFO L470 AbstractCegarLoop]: Abstraction has 49172 states and 181186 transitions. [2022-01-18 16:11:16,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) 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 16:11:16,248 INFO L276 IsEmpty]: Start isEmpty. Operand 49172 states and 181186 transitions. [2022-01-18 16:11:16,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:11:16,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:16,528 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:16,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-18 16:11:16,749 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,SelfDestructingSolverStorable57 [2022-01-18 16:11:16,749 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:11:16,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:16,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1508650798, now seen corresponding path program 20 times [2022-01-18 16:11:16,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:16,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339567866] [2022-01-18 16:11:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:16,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:16,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:16,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339567866] [2022-01-18 16:11:16,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339567866] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:16,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946278185] [2022-01-18 16:11:16,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:11:16,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:16,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:16,775 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:11:16,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 16:11:16,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:11:16,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:16,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:11:16,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:16,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:16,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:16,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946278185] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:16,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:16,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-01-18 16:11:16,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194724604] [2022-01-18 16:11:16,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:16,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 16:11:16,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:16,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 16:11:16,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-01-18 16:11:16,988 INFO L87 Difference]: Start difference. First operand 49172 states and 181186 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 16:11:17,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:17,580 INFO L93 Difference]: Finished difference Result 50754 states and 186141 transitions. [2022-01-18 16:11:17,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 16:11:17,581 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 23 [2022-01-18 16:11:17,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:17,735 INFO L225 Difference]: With dead ends: 50754 [2022-01-18 16:11:17,735 INFO L226 Difference]: Without dead ends: 50754 [2022-01-18 16:11:17,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=296, Invalid=634, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:11:17,736 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 114 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:17,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 123 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:11:17,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50754 states. [2022-01-18 16:11:18,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50754 to 49168. [2022-01-18 16:11:18,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49168 states, 49167 states have (on average 3.6840563792787844) internal successors, (181134), 49167 states have internal predecessors, (181134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:19,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49168 states to 49168 states and 181134 transitions. [2022-01-18 16:11:19,083 INFO L78 Accepts]: Start accepts. Automaton has 49168 states and 181134 transitions. Word has length 23 [2022-01-18 16:11:19,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:19,084 INFO L470 AbstractCegarLoop]: Abstraction has 49168 states and 181134 transitions. [2022-01-18 16:11:19,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 16:11:19,084 INFO L276 IsEmpty]: Start isEmpty. Operand 49168 states and 181134 transitions. [2022-01-18 16:11:19,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:11:19,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:19,476 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] [2022-01-18 16:11:19,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-18 16:11:19,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-18 16:11:19,698 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:11:19,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:19,698 INFO L85 PathProgramCache]: Analyzing trace with hash 2041659458, now seen corresponding path program 18 times [2022-01-18 16:11:19,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:19,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554665257] [2022-01-18 16:11:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:19,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:19,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:19,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554665257] [2022-01-18 16:11:19,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554665257] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:19,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979838335] [2022-01-18 16:11:19,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:11:19,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:19,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:19,778 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:11:19,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 16:11:19,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:11:19,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:19,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:11:19,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:19,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:20,228 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 16:11:20,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979838335] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:20,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:20,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 16:11:20,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941693292] [2022-01-18 16:11:20,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:20,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 16:11:20,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:20,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 16:11:20,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-01-18 16:11:20,229 INFO L87 Difference]: Start difference. First operand 49168 states and 181134 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 16:11:21,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:21,687 INFO L93 Difference]: Finished difference Result 64396 states and 235136 transitions. [2022-01-18 16:11:21,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 16:11:21,688 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 23 [2022-01-18 16:11:21,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:21,895 INFO L225 Difference]: With dead ends: 64396 [2022-01-18 16:11:21,895 INFO L226 Difference]: Without dead ends: 64052 [2022-01-18 16:11:21,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=1611, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:11:21,895 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 335 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:21,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 200 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 715 Invalid, 0 Unknown, 156 Unchecked, 0.4s Time] [2022-01-18 16:11:21,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64052 states. [2022-01-18 16:11:23,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64052 to 49946. [2022-01-18 16:11:23,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49946 states, 49945 states have (on average 3.6853138452297527) internal successors, (184063), 49945 states have internal predecessors, (184063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:23,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49946 states to 49946 states and 184063 transitions. [2022-01-18 16:11:23,419 INFO L78 Accepts]: Start accepts. Automaton has 49946 states and 184063 transitions. Word has length 23 [2022-01-18 16:11:23,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:23,419 INFO L470 AbstractCegarLoop]: Abstraction has 49946 states and 184063 transitions. [2022-01-18 16:11:23,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 16:11:23,419 INFO L276 IsEmpty]: Start isEmpty. Operand 49946 states and 184063 transitions. [2022-01-18 16:11:23,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:11:23,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:23,480 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] [2022-01-18 16:11:23,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-01-18 16:11:23,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:23,681 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:11:23,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:23,682 INFO L85 PathProgramCache]: Analyzing trace with hash 498900542, now seen corresponding path program 19 times [2022-01-18 16:11:23,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:23,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790644706] [2022-01-18 16:11:23,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:23,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:23,767 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 16:11:23,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:23,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790644706] [2022-01-18 16:11:23,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790644706] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:23,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181316222] [2022-01-18 16:11:23,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:11:23,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:23,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:23,768 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:11:23,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 16:11:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:23,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:11:23,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:23,915 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 16:11:23,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:24,227 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 16:11:24,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181316222] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:24,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:24,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 16:11:24,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520012242] [2022-01-18 16:11:24,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:24,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 16:11:24,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:24,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 16:11:24,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-01-18 16:11:24,229 INFO L87 Difference]: Start difference. First operand 49946 states and 184063 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:26,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:26,580 INFO L93 Difference]: Finished difference Result 54689 states and 198839 transitions. [2022-01-18 16:11:26,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 16:11:26,581 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 16:11:26,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:26,778 INFO L225 Difference]: With dead ends: 54689 [2022-01-18 16:11:26,779 INFO L226 Difference]: Without dead ends: 54301 [2022-01-18 16:11:26,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=914, Invalid=2626, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 16:11:26,779 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 329 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:26,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 334 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 988 Invalid, 0 Unknown, 183 Unchecked, 0.5s Time] [2022-01-18 16:11:26,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54301 states. [2022-01-18 16:11:28,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54301 to 49927. [2022-01-18 16:11:28,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49927 states, 49926 states have (on average 3.6852341465368745) internal successors, (183989), 49926 states have internal predecessors, (183989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:28,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49927 states to 49927 states and 183989 transitions. [2022-01-18 16:11:28,315 INFO L78 Accepts]: Start accepts. Automaton has 49927 states and 183989 transitions. Word has length 23 [2022-01-18 16:11:28,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:28,315 INFO L470 AbstractCegarLoop]: Abstraction has 49927 states and 183989 transitions. [2022-01-18 16:11:28,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:28,315 INFO L276 IsEmpty]: Start isEmpty. Operand 49927 states and 183989 transitions. [2022-01-18 16:11:28,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:11:28,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:28,376 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] [2022-01-18 16:11:28,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-01-18 16:11:28,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:28,577 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:11:28,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:28,577 INFO L85 PathProgramCache]: Analyzing trace with hash -763955714, now seen corresponding path program 20 times [2022-01-18 16:11:28,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:28,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667927023] [2022-01-18 16:11:28,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:28,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:28,667 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 16:11:28,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:28,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667927023] [2022-01-18 16:11:28,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667927023] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:28,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816837840] [2022-01-18 16:11:28,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:11:28,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:28,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:28,669 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:11:28,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 16:11:28,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:11:28,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:28,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:11:28,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:28,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:28,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:29,128 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 16:11:29,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816837840] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:29,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:29,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 16:11:29,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291006445] [2022-01-18 16:11:29,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:29,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 16:11:29,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:29,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 16:11:29,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-01-18 16:11:29,129 INFO L87 Difference]: Start difference. First operand 49927 states and 183989 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 16:11:31,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:31,176 INFO L93 Difference]: Finished difference Result 52898 states and 192993 transitions. [2022-01-18 16:11:31,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 16:11:31,176 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 23 [2022-01-18 16:11:31,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:31,346 INFO L225 Difference]: With dead ends: 52898 [2022-01-18 16:11:31,346 INFO L226 Difference]: Without dead ends: 52535 [2022-01-18 16:11:31,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=613, Invalid=1937, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 16:11:31,347 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 245 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:31,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 302 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 929 Invalid, 0 Unknown, 82 Unchecked, 0.8s Time] [2022-01-18 16:11:31,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52535 states. [2022-01-18 16:11:32,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52535 to 50150. [2022-01-18 16:11:32,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50150 states, 50149 states have (on average 3.685397515404096) internal successors, (184819), 50149 states have internal predecessors, (184819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:32,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50150 states to 50150 states and 184819 transitions. [2022-01-18 16:11:32,614 INFO L78 Accepts]: Start accepts. Automaton has 50150 states and 184819 transitions. Word has length 23 [2022-01-18 16:11:32,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:32,614 INFO L470 AbstractCegarLoop]: Abstraction has 50150 states and 184819 transitions. [2022-01-18 16:11:32,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 16:11:32,615 INFO L276 IsEmpty]: Start isEmpty. Operand 50150 states and 184819 transitions. [2022-01-18 16:11:32,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:11:32,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:32,977 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] [2022-01-18 16:11:32,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-18 16:11:33,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:33,191 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:11:33,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:33,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1823119584, now seen corresponding path program 21 times [2022-01-18 16:11:33,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:33,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385488957] [2022-01-18 16:11:33,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:33,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:33,325 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 16:11:33,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:33,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385488957] [2022-01-18 16:11:33,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385488957] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:33,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814050203] [2022-01-18 16:11:33,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:11:33,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:33,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:33,327 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:11:33,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 16:11:33,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:11:33,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:33,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:11:33,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:33,502 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 16:11:33,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:33,856 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 16:11:33,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814050203] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:33,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:33,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 16:11:33,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851107278] [2022-01-18 16:11:33,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:33,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:11:33,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:33,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:11:33,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:11:33,858 INFO L87 Difference]: Start difference. First operand 50150 states and 184819 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 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 16:11:35,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:35,351 INFO L93 Difference]: Finished difference Result 64329 states and 235588 transitions. [2022-01-18 16:11:35,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 16:11:35,351 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 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 23 [2022-01-18 16:11:35,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:35,565 INFO L225 Difference]: With dead ends: 64329 [2022-01-18 16:11:35,566 INFO L226 Difference]: Without dead ends: 64063 [2022-01-18 16:11:35,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=321, Invalid=1401, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:11:35,566 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 213 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:35,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 305 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 921 Invalid, 0 Unknown, 129 Unchecked, 0.5s Time] [2022-01-18 16:11:35,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64063 states. [2022-01-18 16:11:36,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64063 to 50291. [2022-01-18 16:11:36,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50291 states, 50290 states have (on average 3.6863591171206997) internal successors, (185387), 50290 states have internal predecessors, (185387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:37,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50291 states to 50291 states and 185387 transitions. [2022-01-18 16:11:37,180 INFO L78 Accepts]: Start accepts. Automaton has 50291 states and 185387 transitions. Word has length 23 [2022-01-18 16:11:37,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:37,180 INFO L470 AbstractCegarLoop]: Abstraction has 50291 states and 185387 transitions. [2022-01-18 16:11:37,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 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 16:11:37,180 INFO L276 IsEmpty]: Start isEmpty. Operand 50291 states and 185387 transitions. [2022-01-18 16:11:37,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:11:37,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:37,245 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] [2022-01-18 16:11:37,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-01-18 16:11:37,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-01-18 16:11:37,446 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:11:37,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:37,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1052604350, now seen corresponding path program 22 times [2022-01-18 16:11:37,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:37,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346494623] [2022-01-18 16:11:37,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:37,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:37,553 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 16:11:37,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:37,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346494623] [2022-01-18 16:11:37,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346494623] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:37,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806351889] [2022-01-18 16:11:37,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:11:37,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:37,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:37,555 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:11:37,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 16:11:37,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:11:37,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:37,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:11:37,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:37,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:37,954 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 16:11:37,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806351889] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:37,954 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:37,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 16:11:37,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828567910] [2022-01-18 16:11:37,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:37,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 16:11:37,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:37,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 16:11:37,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-01-18 16:11:37,955 INFO L87 Difference]: Start difference. First operand 50291 states and 185387 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 16:11:39,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:39,385 INFO L93 Difference]: Finished difference Result 54198 states and 198484 transitions. [2022-01-18 16:11:39,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 16:11:39,385 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 23 [2022-01-18 16:11:39,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:39,559 INFO L225 Difference]: With dead ends: 54198 [2022-01-18 16:11:39,559 INFO L226 Difference]: Without dead ends: 53891 [2022-01-18 16:11:39,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=522, Invalid=1548, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:11:39,560 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 231 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:39,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 215 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 723 Invalid, 0 Unknown, 127 Unchecked, 0.3s Time] [2022-01-18 16:11:39,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53891 states. [2022-01-18 16:11:40,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53891 to 50627. [2022-01-18 16:11:40,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50627 states, 50626 states have (on average 3.6878876466637696) internal successors, (186703), 50626 states have internal predecessors, (186703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:41,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50627 states to 50627 states and 186703 transitions. [2022-01-18 16:11:41,148 INFO L78 Accepts]: Start accepts. Automaton has 50627 states and 186703 transitions. Word has length 23 [2022-01-18 16:11:41,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:41,148 INFO L470 AbstractCegarLoop]: Abstraction has 50627 states and 186703 transitions. [2022-01-18 16:11:41,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 16:11:41,148 INFO L276 IsEmpty]: Start isEmpty. Operand 50627 states and 186703 transitions. [2022-01-18 16:11:41,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:11:41,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:41,220 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] [2022-01-18 16:11:41,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-18 16:11:41,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-01-18 16:11:41,421 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:11:41,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:41,421 INFO L85 PathProgramCache]: Analyzing trace with hash -2111768220, now seen corresponding path program 23 times [2022-01-18 16:11:41,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:41,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603135979] [2022-01-18 16:11:41,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:41,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:41,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:41,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603135979] [2022-01-18 16:11:41,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603135979] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:41,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388549732] [2022-01-18 16:11:41,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:11:41,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:41,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:41,540 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:11:41,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 16:11:41,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:11:41,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:41,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:11:41,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:41,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:42,033 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 16:11:42,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388549732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:42,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:42,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 16:11:42,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116711950] [2022-01-18 16:11:42,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:42,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:11:42,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:42,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:11:42,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:11:42,035 INFO L87 Difference]: Start difference. First operand 50627 states and 186703 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 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 16:11:43,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:43,091 INFO L93 Difference]: Finished difference Result 63055 states and 232764 transitions. [2022-01-18 16:11:43,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 16:11:43,092 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 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 23 [2022-01-18 16:11:43,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:43,297 INFO L225 Difference]: With dead ends: 63055 [2022-01-18 16:11:43,297 INFO L226 Difference]: Without dead ends: 62953 [2022-01-18 16:11:43,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:11:43,298 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 203 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:43,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 163 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 580 Invalid, 0 Unknown, 97 Unchecked, 0.3s Time] [2022-01-18 16:11:43,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62953 states. [2022-01-18 16:11:44,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62953 to 50622. [2022-01-18 16:11:44,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50622 states, 50621 states have (on average 3.687856818316509) internal successors, (186683), 50621 states have internal predecessors, (186683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:44,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50622 states to 50622 states and 186683 transitions. [2022-01-18 16:11:44,894 INFO L78 Accepts]: Start accepts. Automaton has 50622 states and 186683 transitions. Word has length 23 [2022-01-18 16:11:44,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:44,895 INFO L470 AbstractCegarLoop]: Abstraction has 50622 states and 186683 transitions. [2022-01-18 16:11:44,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 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 16:11:44,895 INFO L276 IsEmpty]: Start isEmpty. Operand 50622 states and 186683 transitions. [2022-01-18 16:11:44,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:11:44,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:44,958 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] [2022-01-18 16:11:44,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-01-18 16:11:45,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:45,158 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:11:45,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:45,159 INFO L85 PathProgramCache]: Analyzing trace with hash 365651024, now seen corresponding path program 24 times [2022-01-18 16:11:45,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:45,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445608965] [2022-01-18 16:11:45,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:45,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:45,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:45,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:11:45,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:45,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445608965] [2022-01-18 16:11:45,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445608965] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:45,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043757201] [2022-01-18 16:11:45,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:11:45,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:45,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:45,225 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:11:45,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 16:11:45,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:11:45,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:45,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 16:11:45,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:45,317 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 16:11:45,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:45,523 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 16:11:45,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043757201] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:45,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:45,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-01-18 16:11:45,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365150902] [2022-01-18 16:11:45,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:45,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 16:11:45,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:45,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 16:11:45,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-01-18 16:11:45,524 INFO L87 Difference]: Start difference. First operand 50622 states and 186683 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 16:11:47,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:47,518 INFO L93 Difference]: Finished difference Result 74584 states and 272486 transitions. [2022-01-18 16:11:47,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 16:11:47,527 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 23 [2022-01-18 16:11:47,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:47,810 INFO L225 Difference]: With dead ends: 74584 [2022-01-18 16:11:47,810 INFO L226 Difference]: Without dead ends: 74568 [2022-01-18 16:11:47,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=753, Invalid=3029, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 16:11:47,810 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 419 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:47,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 292 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:11:47,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74568 states. [2022-01-18 16:11:49,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74568 to 50705. [2022-01-18 16:11:49,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50705 states, 50704 states have (on average 3.688407226254339) internal successors, (187017), 50704 states have internal predecessors, (187017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:49,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50705 states to 50705 states and 187017 transitions. [2022-01-18 16:11:49,346 INFO L78 Accepts]: Start accepts. Automaton has 50705 states and 187017 transitions. Word has length 23 [2022-01-18 16:11:49,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:49,346 INFO L470 AbstractCegarLoop]: Abstraction has 50705 states and 187017 transitions. [2022-01-18 16:11:49,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 16:11:49,347 INFO L276 IsEmpty]: Start isEmpty. Operand 50705 states and 187017 transitions. [2022-01-18 16:11:49,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:11:49,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:49,411 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] [2022-01-18 16:11:49,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-01-18 16:11:49,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:49,611 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:11:49,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:49,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1122420986, now seen corresponding path program 25 times [2022-01-18 16:11:49,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:49,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721793126] [2022-01-18 16:11:49,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:49,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:49,738 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 16:11:49,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:49,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721793126] [2022-01-18 16:11:49,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721793126] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:49,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258312014] [2022-01-18 16:11:49,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:11:49,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:49,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:49,740 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:11:49,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 16:11:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:49,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:11:49,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:49,869 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 16:11:49,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:50,145 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 16:11:50,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258312014] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:50,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:50,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 16:11:50,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575021893] [2022-01-18 16:11:50,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:50,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:11:50,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:50,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:11:50,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:11:50,146 INFO L87 Difference]: Start difference. First operand 50705 states and 187017 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 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 16:11:51,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:51,275 INFO L93 Difference]: Finished difference Result 53238 states and 195578 transitions. [2022-01-18 16:11:51,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 16:11:51,276 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 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 23 [2022-01-18 16:11:51,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:51,458 INFO L225 Difference]: With dead ends: 53238 [2022-01-18 16:11:51,458 INFO L226 Difference]: Without dead ends: 53080 [2022-01-18 16:11:51,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:11:51,458 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 146 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:51,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 125 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 534 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2022-01-18 16:11:51,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53080 states. [2022-01-18 16:11:52,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53080 to 50820. [2022-01-18 16:11:52,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50820 states, 50819 states have (on average 3.6885023318050334) internal successors, (187446), 50819 states have internal predecessors, (187446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:52,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50820 states to 50820 states and 187446 transitions. [2022-01-18 16:11:52,807 INFO L78 Accepts]: Start accepts. Automaton has 50820 states and 187446 transitions. Word has length 23 [2022-01-18 16:11:52,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:52,807 INFO L470 AbstractCegarLoop]: Abstraction has 50820 states and 187446 transitions. [2022-01-18 16:11:52,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 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 16:11:52,807 INFO L276 IsEmpty]: Start isEmpty. Operand 50820 states and 187446 transitions. [2022-01-18 16:11:52,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:11:52,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:52,870 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:52,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-18 16:11:53,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-01-18 16:11:53,072 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:11:53,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:53,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1254398970, now seen corresponding path program 17 times [2022-01-18 16:11:53,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:53,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879160784] [2022-01-18 16:11:53,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:53,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:53,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:53,164 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 16:11:53,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:53,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879160784] [2022-01-18 16:11:53,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879160784] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:53,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156070812] [2022-01-18 16:11:53,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:11:53,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:53,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:53,166 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:11:53,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 16:11:53,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:11:53,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:53,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 16:11:53,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:11:53,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:11:53,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156070812] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:53,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:53,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-01-18 16:11:53,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419427532] [2022-01-18 16:11:53,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:53,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 16:11:53,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:53,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 16:11:53,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-01-18 16:11:53,433 INFO L87 Difference]: Start difference. First operand 50820 states and 187446 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 16:11:53,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:53,792 INFO L93 Difference]: Finished difference Result 51214 states and 188578 transitions. [2022-01-18 16:11:53,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 16:11:53,792 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 23 [2022-01-18 16:11:53,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:53,961 INFO L225 Difference]: With dead ends: 51214 [2022-01-18 16:11:53,961 INFO L226 Difference]: Without dead ends: 51141 [2022-01-18 16:11:53,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 16:11:53,961 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 49 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:53,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 218 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:11:54,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51141 states. [2022-01-18 16:11:55,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51141 to 50768. [2022-01-18 16:11:55,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50768 states, 50767 states have (on average 3.688262059999606) internal successors, (187242), 50767 states have internal predecessors, (187242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:55,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50768 states to 50768 states and 187242 transitions. [2022-01-18 16:11:55,723 INFO L78 Accepts]: Start accepts. Automaton has 50768 states and 187242 transitions. Word has length 23 [2022-01-18 16:11:55,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:55,724 INFO L470 AbstractCegarLoop]: Abstraction has 50768 states and 187242 transitions. [2022-01-18 16:11:55,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 16:11:55,724 INFO L276 IsEmpty]: Start isEmpty. Operand 50768 states and 187242 transitions. [2022-01-18 16:11:55,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:11:55,797 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:55,797 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:55,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 16:11:55,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-01-18 16:11:55,998 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:11:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:55,998 INFO L85 PathProgramCache]: Analyzing trace with hash -97569618, now seen corresponding path program 18 times [2022-01-18 16:11:55,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:55,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331926452] [2022-01-18 16:11:55,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:55,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:56,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:11:56,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:56,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331926452] [2022-01-18 16:11:56,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331926452] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:56,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031833642] [2022-01-18 16:11:56,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:11:56,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:56,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:56,058 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:11:56,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 16:11:56,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:11:56,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:56,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 16:11:56,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:11:56,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:11:56,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031833642] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:56,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:56,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 10 [2022-01-18 16:11:56,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237610872] [2022-01-18 16:11:56,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:56,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 16:11:56,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:56,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 16:11:56,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 16:11:56,330 INFO L87 Difference]: Start difference. First operand 50768 states and 187242 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:56,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:56,769 INFO L93 Difference]: Finished difference Result 51568 states and 189738 transitions. [2022-01-18 16:11:56,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 16:11:56,770 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 16:11:56,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:56,936 INFO L225 Difference]: With dead ends: 51568 [2022-01-18 16:11:56,936 INFO L226 Difference]: Without dead ends: 51449 [2022-01-18 16:11:56,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 10 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-01-18 16:11:56,937 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 70 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:56,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 188 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:11:56,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51449 states. [2022-01-18 16:11:58,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51449 to 51115. [2022-01-18 16:11:58,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51115 states, 51114 states have (on average 3.6864068552647025) internal successors, (188427), 51114 states have internal predecessors, (188427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:58,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51115 states to 51115 states and 188427 transitions. [2022-01-18 16:11:58,228 INFO L78 Accepts]: Start accepts. Automaton has 51115 states and 188427 transitions. Word has length 23 [2022-01-18 16:11:58,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:58,228 INFO L470 AbstractCegarLoop]: Abstraction has 51115 states and 188427 transitions. [2022-01-18 16:11:58,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:58,228 INFO L276 IsEmpty]: Start isEmpty. Operand 51115 states and 188427 transitions. [2022-01-18 16:11:58,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:11:58,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:58,292 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:58,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-18 16:11:58,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:58,492 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:11:58,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:58,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1949809626, now seen corresponding path program 19 times [2022-01-18 16:11:58,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:58,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131493489] [2022-01-18 16:11:58,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:58,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:58,559 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 16:11:58,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:58,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131493489] [2022-01-18 16:11:58,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131493489] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:58,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185079674] [2022-01-18 16:11:58,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:11:58,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:58,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:58,561 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:11:58,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 16:11:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:58,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 16:11:58,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:58,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:11:58,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:58,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:11:58,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185079674] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:58,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:58,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-01-18 16:11:58,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479740174] [2022-01-18 16:11:58,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:58,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 16:11:58,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:58,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 16:11:58,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 16:11:58,780 INFO L87 Difference]: Start difference. First operand 51115 states and 188427 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:59,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:59,448 INFO L93 Difference]: Finished difference Result 51903 states and 190754 transitions. [2022-01-18 16:11:59,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 16:11:59,448 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 16:11:59,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:59,614 INFO L225 Difference]: With dead ends: 51903 [2022-01-18 16:11:59,615 INFO L226 Difference]: Without dead ends: 51757 [2022-01-18 16:11:59,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-18 16:11:59,615 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 50 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:59,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 285 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:11:59,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51757 states. [2022-01-18 16:12:00,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51757 to 51285. [2022-01-18 16:12:00,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51285 states, 51284 states have (on average 3.6865884096404336) internal successors, (189063), 51284 states have internal predecessors, (189063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:00,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51285 states to 51285 states and 189063 transitions. [2022-01-18 16:12:00,891 INFO L78 Accepts]: Start accepts. Automaton has 51285 states and 189063 transitions. Word has length 23 [2022-01-18 16:12:00,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:12:00,891 INFO L470 AbstractCegarLoop]: Abstraction has 51285 states and 189063 transitions. [2022-01-18 16:12:00,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:00,892 INFO L276 IsEmpty]: Start isEmpty. Operand 51285 states and 189063 transitions. [2022-01-18 16:12:00,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:12:00,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:12:00,958 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:12:00,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-18 16:12:01,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-18 16:12:01,159 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:12:01,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:12:01,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1845249086, now seen corresponding path program 20 times [2022-01-18 16:12:01,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:12:01,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683608776] [2022-01-18 16:12:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:12:01,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:12:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:01,229 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 16:12:01,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:12:01,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683608776] [2022-01-18 16:12:01,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683608776] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:12:01,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180925349] [2022-01-18 16:12:01,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:12:01,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:01,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:12:01,231 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:12:01,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 16:12:01,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:12:01,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:12:01,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 16:12:01,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:12:01,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:12:01,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:12:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:12:01,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180925349] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:12:01,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:12:01,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 13 [2022-01-18 16:12:01,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989324308] [2022-01-18 16:12:01,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:12:01,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 16:12:01,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:12:01,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 16:12:01,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 16:12:01,484 INFO L87 Difference]: Start difference. First operand 51285 states and 189063 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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 16:12:01,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:12:01,920 INFO L93 Difference]: Finished difference Result 51877 states and 190892 transitions. [2022-01-18 16:12:01,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 16:12:01,921 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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 23 [2022-01-18 16:12:01,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:12:02,086 INFO L225 Difference]: With dead ends: 51877 [2022-01-18 16:12:02,086 INFO L226 Difference]: Without dead ends: 51783 [2022-01-18 16:12:02,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-18 16:12:02,087 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 77 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:12:02,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 304 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:12:02,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51783 states. [2022-01-18 16:12:03,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51783 to 51526. [2022-01-18 16:12:03,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51526 states, 51525 states have (on average 3.6843085880640465) internal successors, (189834), 51525 states have internal predecessors, (189834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:03,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51526 states to 51526 states and 189834 transitions. [2022-01-18 16:12:03,913 INFO L78 Accepts]: Start accepts. Automaton has 51526 states and 189834 transitions. Word has length 23 [2022-01-18 16:12:03,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:12:03,913 INFO L470 AbstractCegarLoop]: Abstraction has 51526 states and 189834 transitions. [2022-01-18 16:12:03,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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 16:12:03,913 INFO L276 IsEmpty]: Start isEmpty. Operand 51526 states and 189834 transitions. [2022-01-18 16:12:03,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:12:03,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:12:03,979 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:12:03,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 16:12:04,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:04,179 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:12:04,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:12:04,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1982895082, now seen corresponding path program 21 times [2022-01-18 16:12:04,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:12:04,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291567132] [2022-01-18 16:12:04,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:12:04,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:12:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:04,246 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 16:12:04,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:12:04,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291567132] [2022-01-18 16:12:04,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291567132] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:12:04,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560762219] [2022-01-18 16:12:04,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:12:04,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:04,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:12:04,247 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:12:04,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 16:12:04,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:12:04,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:12:04,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 16:12:04,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:12:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:12:04,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:12:04,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:12:04,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560762219] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:12:04,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:12:04,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-01-18 16:12:04,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168693125] [2022-01-18 16:12:04,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:12:04,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 16:12:04,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:12:04,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 16:12:04,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-01-18 16:12:04,400 INFO L87 Difference]: Start difference. First operand 51526 states and 189834 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 16:12:04,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:12:04,802 INFO L93 Difference]: Finished difference Result 52407 states and 192327 transitions. [2022-01-18 16:12:04,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 16:12:04,802 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 23 [2022-01-18 16:12:04,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:12:04,968 INFO L225 Difference]: With dead ends: 52407 [2022-01-18 16:12:04,968 INFO L226 Difference]: Without dead ends: 52346 [2022-01-18 16:12:04,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-18 16:12:04,968 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 91 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:12:04,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 262 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:12:05,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52346 states. [2022-01-18 16:12:06,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52346 to 51817. [2022-01-18 16:12:06,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51817 states, 51816 states have (on average 3.6825304925119653) internal successors, (190814), 51816 states have internal predecessors, (190814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:06,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51817 states to 51817 states and 190814 transitions. [2022-01-18 16:12:06,290 INFO L78 Accepts]: Start accepts. Automaton has 51817 states and 190814 transitions. Word has length 23 [2022-01-18 16:12:06,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:12:06,290 INFO L470 AbstractCegarLoop]: Abstraction has 51817 states and 190814 transitions. [2022-01-18 16:12:06,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 16:12:06,290 INFO L276 IsEmpty]: Start isEmpty. Operand 51817 states and 190814 transitions. [2022-01-18 16:12:06,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:12:06,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:12:06,354 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] [2022-01-18 16:12:06,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-18 16:12:06,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:06,556 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:12:06,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:12:06,556 INFO L85 PathProgramCache]: Analyzing trace with hash 759447458, now seen corresponding path program 26 times [2022-01-18 16:12:06,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:12:06,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440717563] [2022-01-18 16:12:06,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:12:06,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:12:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:06,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:12:06,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440717563] [2022-01-18 16:12:06,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440717563] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:12:06,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331459906] [2022-01-18 16:12:06,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:12:06,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:06,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:12:06,600 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:12:06,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 16:12:06,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:12:06,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:12:06,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:12:06,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:12:06,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:06,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:12:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:06,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331459906] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:12:06,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:12:06,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 15 [2022-01-18 16:12:06,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564495777] [2022-01-18 16:12:06,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:12:06,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 16:12:06,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:12:06,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 16:12:06,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-01-18 16:12:06,769 INFO L87 Difference]: Start difference. First operand 51817 states and 190814 transitions. Second operand has 16 states, 16 states have (on average 2.8125) 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 16:12:08,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:12:08,191 INFO L93 Difference]: Finished difference Result 149980 states and 550232 transitions. [2022-01-18 16:12:08,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 16:12:08,192 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) 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 23 [2022-01-18 16:12:08,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:12:08,784 INFO L225 Difference]: With dead ends: 149980 [2022-01-18 16:12:08,784 INFO L226 Difference]: Without dead ends: 149950 [2022-01-18 16:12:08,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=299, Invalid=571, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:12:08,784 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 206 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:12:08,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 146 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:12:09,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149950 states. [2022-01-18 16:12:11,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149950 to 74032. [2022-01-18 16:12:11,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74032 states, 74031 states have (on average 3.695762585943726) internal successors, (273601), 74031 states have internal predecessors, (273601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:12,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74032 states to 74032 states and 273601 transitions. [2022-01-18 16:12:12,235 INFO L78 Accepts]: Start accepts. Automaton has 74032 states and 273601 transitions. Word has length 23 [2022-01-18 16:12:12,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:12:12,235 INFO L470 AbstractCegarLoop]: Abstraction has 74032 states and 273601 transitions. [2022-01-18 16:12:12,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) 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 16:12:12,236 INFO L276 IsEmpty]: Start isEmpty. Operand 74032 states and 273601 transitions. [2022-01-18 16:12:12,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:12:12,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:12:12,320 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] [2022-01-18 16:12:12,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-18 16:12:12,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-01-18 16:12:12,521 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:12:12,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:12:12,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1245251562, now seen corresponding path program 27 times [2022-01-18 16:12:12,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:12:12,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249559935] [2022-01-18 16:12:12,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:12:12,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:12:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:12,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:12:12,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249559935] [2022-01-18 16:12:12,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249559935] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:12:12,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464302644] [2022-01-18 16:12:12,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:12:12,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:12,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:12:12,555 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:12:12,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 16:12:12,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:12:12,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:12:12,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:12:12,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:12:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:12,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:12:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:12,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464302644] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:12:12,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:12:12,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 15 [2022-01-18 16:12:12,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182687461] [2022-01-18 16:12:12,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:12:12,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 16:12:12,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:12:12,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 16:12:12,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-01-18 16:12:12,721 INFO L87 Difference]: Start difference. First operand 74032 states and 273601 transitions. Second operand has 16 states, 16 states have (on average 2.8125) 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 16:12:14,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:12:14,383 INFO L93 Difference]: Finished difference Result 158003 states and 582353 transitions. [2022-01-18 16:12:14,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 16:12:14,383 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) 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 23 [2022-01-18 16:12:14,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:12:15,064 INFO L225 Difference]: With dead ends: 158003 [2022-01-18 16:12:15,064 INFO L226 Difference]: Without dead ends: 158003 [2022-01-18 16:12:15,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=256, Invalid=446, Unknown=0, NotChecked=0, Total=702 [2022-01-18 16:12:15,064 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 219 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:12:15,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 62 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:12:15,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158003 states. [2022-01-18 16:12:17,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158003 to 98285. [2022-01-18 16:12:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98285 states, 98284 states have (on average 3.7211753693378373) internal successors, (365732), 98284 states have internal predecessors, (365732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:18,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98285 states to 98285 states and 365732 transitions. [2022-01-18 16:12:18,264 INFO L78 Accepts]: Start accepts. Automaton has 98285 states and 365732 transitions. Word has length 23 [2022-01-18 16:12:18,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:12:18,264 INFO L470 AbstractCegarLoop]: Abstraction has 98285 states and 365732 transitions. [2022-01-18 16:12:18,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) 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 16:12:18,264 INFO L276 IsEmpty]: Start isEmpty. Operand 98285 states and 365732 transitions. [2022-01-18 16:12:18,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:12:18,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:12:18,382 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:12:18,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-01-18 16:12:18,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:18,583 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:12:18,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:12:18,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1186532844, now seen corresponding path program 22 times [2022-01-18 16:12:18,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:12:18,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434167404] [2022-01-18 16:12:18,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:12:18,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:12:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:18,651 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 16:12:18,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:12:18,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434167404] [2022-01-18 16:12:18,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434167404] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:12:18,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026419430] [2022-01-18 16:12:18,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:12:18,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:18,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:12:18,653 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:12:18,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 16:12:18,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:12:18,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:12:18,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 16:12:18,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:12:18,757 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 16:12:18,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:12:18,854 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 16:12:18,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026419430] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:12:18,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:12:18,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-01-18 16:12:18,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234489782] [2022-01-18 16:12:18,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:12:18,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 16:12:18,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:12:18,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 16:12:18,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-18 16:12:18,855 INFO L87 Difference]: Start difference. First operand 98285 states and 365732 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 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 16:12:20,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:12:20,070 INFO L93 Difference]: Finished difference Result 99056 states and 368040 transitions. [2022-01-18 16:12:20,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 16:12:20,071 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 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 23 [2022-01-18 16:12:20,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:12:20,452 INFO L225 Difference]: With dead ends: 99056 [2022-01-18 16:12:20,452 INFO L226 Difference]: Without dead ends: 98998 [2022-01-18 16:12:20,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-01-18 16:12:20,452 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 47 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:12:20,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 227 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:12:20,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98998 states. [2022-01-18 16:12:22,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98998 to 98589. [2022-01-18 16:12:23,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98589 states, 98588 states have (on average 3.7205745121110074) internal successors, (366804), 98588 states have internal predecessors, (366804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:23,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98589 states to 98589 states and 366804 transitions. [2022-01-18 16:12:23,458 INFO L78 Accepts]: Start accepts. Automaton has 98589 states and 366804 transitions. Word has length 23 [2022-01-18 16:12:23,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:12:23,458 INFO L470 AbstractCegarLoop]: Abstraction has 98589 states and 366804 transitions. [2022-01-18 16:12:23,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 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 16:12:23,458 INFO L276 IsEmpty]: Start isEmpty. Operand 98589 states and 366804 transitions. [2022-01-18 16:12:23,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:12:23,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:12:23,591 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:12:23,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-01-18 16:12:23,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:23,792 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:12:23,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:12:23,792 INFO L85 PathProgramCache]: Analyzing trace with hash 786212196, now seen corresponding path program 28 times [2022-01-18 16:12:23,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:12:23,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869419448] [2022-01-18 16:12:23,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:12:23,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:12:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:23,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:12:23,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869419448] [2022-01-18 16:12:23,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869419448] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:12:23,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956351043] [2022-01-18 16:12:23,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:12:23,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:23,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:12:23,888 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:12:23,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 16:12:23,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:12:23,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:12:23,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 16:12:23,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:12:24,005 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:24,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:12:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:24,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956351043] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:12:24,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:12:24,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-01-18 16:12:24,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066114510] [2022-01-18 16:12:24,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:12:24,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 16:12:24,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:12:24,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 16:12:24,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-01-18 16:12:24,159 INFO L87 Difference]: Start difference. First operand 98589 states and 366804 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) 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 16:12:25,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:12:25,890 INFO L93 Difference]: Finished difference Result 99789 states and 370318 transitions. [2022-01-18 16:12:25,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 16:12:25,891 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) 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 25 [2022-01-18 16:12:25,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:12:26,479 INFO L225 Difference]: With dead ends: 99789 [2022-01-18 16:12:26,479 INFO L226 Difference]: Without dead ends: 99743 [2022-01-18 16:12:26,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:12:26,479 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 109 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:12:26,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 490 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:12:26,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99743 states. [2022-01-18 16:12:28,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99743 to 99080. [2022-01-18 16:12:28,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99080 states, 99079 states have (on average 3.7192139605769134) internal successors, (368496), 99079 states have internal predecessors, (368496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:29,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99080 states to 99080 states and 368496 transitions. [2022-01-18 16:12:29,480 INFO L78 Accepts]: Start accepts. Automaton has 99080 states and 368496 transitions. Word has length 25 [2022-01-18 16:12:29,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:12:29,481 INFO L470 AbstractCegarLoop]: Abstraction has 99080 states and 368496 transitions. [2022-01-18 16:12:29,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) 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 16:12:29,481 INFO L276 IsEmpty]: Start isEmpty. Operand 99080 states and 368496 transitions. [2022-01-18 16:12:29,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:12:29,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:12:29,627 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:12:29,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-01-18 16:12:29,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:29,827 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:12:29,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:12:29,828 INFO L85 PathProgramCache]: Analyzing trace with hash -94226864, now seen corresponding path program 29 times [2022-01-18 16:12:29,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:12:29,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830390448] [2022-01-18 16:12:29,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:12:29,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:12:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:29,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:12:29,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830390448] [2022-01-18 16:12:29,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830390448] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:12:29,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086503774] [2022-01-18 16:12:29,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:12:29,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:29,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:12:29,899 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:12:29,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 16:12:29,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 16:12:29,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:12:29,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 16:12:29,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:12:30,010 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:30,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:12:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:30,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086503774] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:12:30,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:12:30,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 16:12:30,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104573919] [2022-01-18 16:12:30,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:12:30,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 16:12:30,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:12:30,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 16:12:30,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-18 16:12:30,136 INFO L87 Difference]: Start difference. First operand 99080 states and 368496 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 16:12:30,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:12:30,921 INFO L93 Difference]: Finished difference Result 101021 states and 374921 transitions. [2022-01-18 16:12:30,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 16:12:30,921 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 25 [2022-01-18 16:12:30,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:12:31,880 INFO L225 Difference]: With dead ends: 101021 [2022-01-18 16:12:31,880 INFO L226 Difference]: Without dead ends: 100948 [2022-01-18 16:12:31,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-01-18 16:12:31,881 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 99 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:12:31,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 447 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:12:31,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100948 states. [2022-01-18 16:12:33,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100948 to 100006. [2022-01-18 16:12:33,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100006 states, 100005 states have (on average 3.7180740962951853) internal successors, (371826), 100005 states have internal predecessors, (371826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:34,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100006 states to 100006 states and 371826 transitions. [2022-01-18 16:12:34,742 INFO L78 Accepts]: Start accepts. Automaton has 100006 states and 371826 transitions. Word has length 25 [2022-01-18 16:12:34,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:12:34,743 INFO L470 AbstractCegarLoop]: Abstraction has 100006 states and 371826 transitions. [2022-01-18 16:12:34,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 16:12:34,743 INFO L276 IsEmpty]: Start isEmpty. Operand 100006 states and 371826 transitions. [2022-01-18 16:12:34,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:12:34,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:12:34,886 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:12:34,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-18 16:12:35,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-01-18 16:12:35,087 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:12:35,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:12:35,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1627658808, now seen corresponding path program 30 times [2022-01-18 16:12:35,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:12:35,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18570567] [2022-01-18 16:12:35,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:12:35,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:12:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:35,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:12:35,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18570567] [2022-01-18 16:12:35,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18570567] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:12:35,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490364482] [2022-01-18 16:12:35,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:12:35,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:35,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:12:35,166 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:12:35,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 16:12:35,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:12:35,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:12:35,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 16:12:35,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:12:35,280 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:35,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:12:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:35,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490364482] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:12:35,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:12:35,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 13 [2022-01-18 16:12:35,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134972710] [2022-01-18 16:12:35,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:12:35,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 16:12:35,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:12:35,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 16:12:35,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-18 16:12:35,382 INFO L87 Difference]: Start difference. First operand 100006 states and 371826 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) 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 16:12:36,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:12:36,255 INFO L93 Difference]: Finished difference Result 101212 states and 375366 transitions. [2022-01-18 16:12:36,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 16:12:36,255 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) 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 25 [2022-01-18 16:12:36,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:12:37,269 INFO L225 Difference]: With dead ends: 101212 [2022-01-18 16:12:37,269 INFO L226 Difference]: Without dead ends: 101187 [2022-01-18 16:12:37,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-18 16:12:37,270 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 98 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:12:37,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 456 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:12:37,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101187 states. [2022-01-18 16:12:39,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101187 to 100410. [2022-01-18 16:12:39,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100410 states, 100409 states have (on average 3.7174556065691324) internal successors, (373266), 100409 states have internal predecessors, (373266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:40,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100410 states to 100410 states and 373266 transitions. [2022-01-18 16:12:40,180 INFO L78 Accepts]: Start accepts. Automaton has 100410 states and 373266 transitions. Word has length 25 [2022-01-18 16:12:40,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:12:40,180 INFO L470 AbstractCegarLoop]: Abstraction has 100410 states and 373266 transitions. [2022-01-18 16:12:40,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) 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 16:12:40,180 INFO L276 IsEmpty]: Start isEmpty. Operand 100410 states and 373266 transitions. [2022-01-18 16:12:40,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:12:40,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:12:40,331 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:12:40,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-18 16:12:40,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:40,531 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:12:40,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:12:40,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1624702482, now seen corresponding path program 31 times [2022-01-18 16:12:40,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:12:40,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032551092] [2022-01-18 16:12:40,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:12:40,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:12:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:40,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:12:40,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032551092] [2022-01-18 16:12:40,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032551092] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:12:40,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852045983] [2022-01-18 16:12:40,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:12:40,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:40,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:12:40,608 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:12:40,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 16:12:40,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:40,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 16:12:40,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:12:40,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:40,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:12:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:40,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852045983] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:12:40,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:12:40,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2022-01-18 16:12:40,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79130197] [2022-01-18 16:12:40,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:12:40,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 16:12:40,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:12:40,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 16:12:40,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-01-18 16:12:40,872 INFO L87 Difference]: Start difference. First operand 100410 states and 373266 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) 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 16:12:41,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:12:41,609 INFO L93 Difference]: Finished difference Result 101635 states and 376817 transitions. [2022-01-18 16:12:41,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 16:12:41,609 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 25 [2022-01-18 16:12:41,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:12:42,511 INFO L225 Difference]: With dead ends: 101635 [2022-01-18 16:12:42,512 INFO L226 Difference]: Without dead ends: 101562 [2022-01-18 16:12:42,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-18 16:12:42,512 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 75 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:12:42,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 341 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:12:42,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101562 states. [2022-01-18 16:12:44,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101562 to 100619. [2022-01-18 16:12:44,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100619 states, 100618 states have (on average 3.7178238486155557) internal successors, (374080), 100618 states have internal predecessors, (374080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:45,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100619 states to 100619 states and 374080 transitions. [2022-01-18 16:12:45,382 INFO L78 Accepts]: Start accepts. Automaton has 100619 states and 374080 transitions. Word has length 25 [2022-01-18 16:12:45,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:12:45,382 INFO L470 AbstractCegarLoop]: Abstraction has 100619 states and 374080 transitions. [2022-01-18 16:12:45,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 16:12:45,382 INFO L276 IsEmpty]: Start isEmpty. Operand 100619 states and 374080 transitions. [2022-01-18 16:12:45,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:12:45,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:12:45,532 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:12:45,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-18 16:12:45,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:45,733 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:12:45,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:12:45,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1401888858, now seen corresponding path program 32 times [2022-01-18 16:12:45,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:12:45,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379690584] [2022-01-18 16:12:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:12:45,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:12:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:45,805 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:12:45,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:12:45,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379690584] [2022-01-18 16:12:45,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379690584] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:12:45,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568910682] [2022-01-18 16:12:45,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:12:45,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:45,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:12:45,807 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:12:45,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 16:12:45,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:12:45,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:12:45,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 16:12:45,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:12:45,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:12:45,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:12:46,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:12:46,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568910682] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:12:46,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:12:46,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-01-18 16:12:46,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535187495] [2022-01-18 16:12:46,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:12:46,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 16:12:46,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:12:46,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 16:12:46,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-01-18 16:12:46,067 INFO L87 Difference]: Start difference. First operand 100619 states and 374080 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:46,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:12:46,830 INFO L93 Difference]: Finished difference Result 102353 states and 379262 transitions. [2022-01-18 16:12:46,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 16:12:46,830 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 16:12:46,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:12:47,741 INFO L225 Difference]: With dead ends: 102353 [2022-01-18 16:12:47,741 INFO L226 Difference]: Without dead ends: 102254 [2022-01-18 16:12:47,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-01-18 16:12:47,742 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 88 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:12:47,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 377 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:12:47,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102254 states. [2022-01-18 16:12:49,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102254 to 100990. [2022-01-18 16:12:49,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100990 states, 100989 states have (on average 3.7180088920575507) internal successors, (375478), 100989 states have internal predecessors, (375478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:50,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100990 states to 100990 states and 375478 transitions. [2022-01-18 16:12:50,631 INFO L78 Accepts]: Start accepts. Automaton has 100990 states and 375478 transitions. Word has length 25 [2022-01-18 16:12:50,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:12:50,631 INFO L470 AbstractCegarLoop]: Abstraction has 100990 states and 375478 transitions. [2022-01-18 16:12:50,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:50,631 INFO L276 IsEmpty]: Start isEmpty. Operand 100990 states and 375478 transitions. [2022-01-18 16:12:50,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:12:50,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:12:50,778 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:12:50,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-18 16:12:50,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-01-18 16:12:50,978 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:12:50,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:12:50,979 INFO L85 PathProgramCache]: Analyzing trace with hash -195414166, now seen corresponding path program 33 times [2022-01-18 16:12:50,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:12:50,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937145023] [2022-01-18 16:12:50,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:12:50,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:12:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:51,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:12:51,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937145023] [2022-01-18 16:12:51,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937145023] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:12:51,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374544161] [2022-01-18 16:12:51,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:12:51,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:51,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:12:51,054 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:12:51,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 16:12:51,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:12:51,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:12:51,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 16:12:51,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:12:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:51,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:12:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:51,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374544161] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:12:51,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:12:51,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-01-18 16:12:51,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839552348] [2022-01-18 16:12:51,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:12:51,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 16:12:51,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:12:51,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 16:12:51,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 16:12:51,284 INFO L87 Difference]: Start difference. First operand 100990 states and 375478 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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 16:12:52,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:12:52,104 INFO L93 Difference]: Finished difference Result 104802 states and 388036 transitions. [2022-01-18 16:12:52,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 16:12:52,104 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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 25 [2022-01-18 16:12:52,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:12:53,050 INFO L225 Difference]: With dead ends: 104802 [2022-01-18 16:12:53,050 INFO L226 Difference]: Without dead ends: 104702 [2022-01-18 16:12:53,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-18 16:12:53,051 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 107 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:12:53,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 419 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:12:53,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104702 states. [2022-01-18 16:12:55,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104702 to 102377. [2022-01-18 16:12:55,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102377 states, 102376 states have (on average 3.716349535047277) internal successors, (380465), 102376 states have internal predecessors, (380465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:56,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102377 states to 102377 states and 380465 transitions. [2022-01-18 16:12:56,034 INFO L78 Accepts]: Start accepts. Automaton has 102377 states and 380465 transitions. Word has length 25 [2022-01-18 16:12:56,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:12:56,034 INFO L470 AbstractCegarLoop]: Abstraction has 102377 states and 380465 transitions. [2022-01-18 16:12:56,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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 16:12:56,034 INFO L276 IsEmpty]: Start isEmpty. Operand 102377 states and 380465 transitions. [2022-01-18 16:12:56,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:12:56,173 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:12:56,173 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:12:56,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-18 16:12:56,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:56,374 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:12:56,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:12:56,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1981712050, now seen corresponding path program 21 times [2022-01-18 16:12:56,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:12:56,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884895226] [2022-01-18 16:12:56,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:12:56,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:12:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:56,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:12:56,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884895226] [2022-01-18 16:12:56,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884895226] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:12:56,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995993107] [2022-01-18 16:12:56,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:12:56,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:56,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:12:56,420 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:12:56,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 16:12:56,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:12:56,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:12:56,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 16:12:56,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:12:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:56,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:12:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:56,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995993107] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:12:56,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:12:56,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-01-18 16:12:56,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571676399] [2022-01-18 16:12:56,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:12:56,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 16:12:56,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:12:56,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 16:12:56,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2022-01-18 16:12:56,669 INFO L87 Difference]: Start difference. First operand 102377 states and 380465 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 16:12:59,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:12:59,367 INFO L93 Difference]: Finished difference Result 276637 states and 1019556 transitions. [2022-01-18 16:12:59,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 16:12:59,367 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 25 [2022-01-18 16:12:59,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:13:01,326 INFO L225 Difference]: With dead ends: 276637 [2022-01-18 16:13:01,326 INFO L226 Difference]: Without dead ends: 276621 [2022-01-18 16:13:01,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=639, Invalid=1341, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 16:13:01,327 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 532 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:13:01,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 135 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:13:01,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276621 states. [2022-01-18 16:13:07,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276621 to 204366. [2022-01-18 16:13:07,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204366 states, 204365 states have (on average 3.7172901426369487) internal successors, (759684), 204365 states have internal predecessors, (759684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:13:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204366 states to 204366 states and 759684 transitions. [2022-01-18 16:13:09,510 INFO L78 Accepts]: Start accepts. Automaton has 204366 states and 759684 transitions. Word has length 25 [2022-01-18 16:13:09,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:13:09,510 INFO L470 AbstractCegarLoop]: Abstraction has 204366 states and 759684 transitions. [2022-01-18 16:13:09,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 16:13:09,510 INFO L276 IsEmpty]: Start isEmpty. Operand 204366 states and 759684 transitions. [2022-01-18 16:13:09,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:13:09,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:13:09,750 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:13:09,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-18 16:13:09,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:13:09,951 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:13:09,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:13:09,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1495907946, now seen corresponding path program 22 times [2022-01-18 16:13:09,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:13:09,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065111017] [2022-01-18 16:13:09,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:13:09,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:13:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:13:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:09,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:13:09,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065111017] [2022-01-18 16:13:09,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065111017] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:13:09,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769029455] [2022-01-18 16:13:09,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:13:09,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:13:09,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:13:09,988 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:13:09,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 16:13:10,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:13:10,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:13:10,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 16:13:10,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:13:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:10,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:13:10,184 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:10,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769029455] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:13:10,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:13:10,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-01-18 16:13:10,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117304930] [2022-01-18 16:13:10,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:13:10,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 16:13:10,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:13:10,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 16:13:10,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2022-01-18 16:13:10,185 INFO L87 Difference]: Start difference. First operand 204366 states and 759684 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 16:13:14,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:13:14,625 INFO L93 Difference]: Finished difference Result 450253 states and 1667299 transitions. [2022-01-18 16:13:14,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 16:13:14,625 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 25 [2022-01-18 16:13:14,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:13:17,908 INFO L225 Difference]: With dead ends: 450253 [2022-01-18 16:13:17,908 INFO L226 Difference]: Without dead ends: 450253 [2022-01-18 16:13:17,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:13:17,909 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 250 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:13:17,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 90 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:13:18,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450253 states. [2022-01-18 16:13:27,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450253 to 286637. [2022-01-18 16:13:27,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286637 states, 286636 states have (on average 3.705075426673551) internal successors, (1062008), 286636 states have internal predecessors, (1062008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:13:29,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286637 states to 286637 states and 1062008 transitions. [2022-01-18 16:13:29,932 INFO L78 Accepts]: Start accepts. Automaton has 286637 states and 1062008 transitions. Word has length 25 [2022-01-18 16:13:29,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:13:29,932 INFO L470 AbstractCegarLoop]: Abstraction has 286637 states and 1062008 transitions. [2022-01-18 16:13:29,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 16:13:29,932 INFO L276 IsEmpty]: Start isEmpty. Operand 286637 states and 1062008 transitions. [2022-01-18 16:13:30,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:13:30,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:13:30,227 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:13:30,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-01-18 16:13:30,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:13:30,428 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:13:30,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:13:30,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1886312940, now seen corresponding path program 34 times [2022-01-18 16:13:30,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:13:30,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212483447] [2022-01-18 16:13:30,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:13:30,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:13:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:13:30,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:30,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:13:30,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212483447] [2022-01-18 16:13:30,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212483447] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:13:30,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171889755] [2022-01-18 16:13:30,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:13:30,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:13:30,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:13:30,528 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:13:30,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 16:13:30,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:13:30,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:13:30,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:13:30,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:13:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:30,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:13:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:31,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171889755] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:13:31,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:13:31,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 16:13:31,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834126159] [2022-01-18 16:13:31,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:13:31,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 16:13:31,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:13:31,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 16:13:31,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-01-18 16:13:31,039 INFO L87 Difference]: Start difference. First operand 286637 states and 1062008 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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 16:13:36,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:13:36,420 INFO L93 Difference]: Finished difference Result 291437 states and 1076297 transitions. [2022-01-18 16:13:36,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 16:13:36,420 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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 25 [2022-01-18 16:13:36,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:13:38,528 INFO L225 Difference]: With dead ends: 291437 [2022-01-18 16:13:38,528 INFO L226 Difference]: Without dead ends: 290870 [2022-01-18 16:13:38,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1066, Invalid=4786, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 16:13:38,528 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 312 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 1842 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:13:38,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 440 Invalid, 1954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1842 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 16:13:38,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290870 states. [2022-01-18 16:13:45,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290870 to 287839. [2022-01-18 16:13:46,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287839 states, 287838 states have (on average 3.7038473029968246) internal successors, (1066108), 287838 states have internal predecessors, (1066108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:13:49,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287839 states to 287839 states and 1066108 transitions. [2022-01-18 16:13:49,298 INFO L78 Accepts]: Start accepts. Automaton has 287839 states and 1066108 transitions. Word has length 25 [2022-01-18 16:13:49,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:13:49,298 INFO L470 AbstractCegarLoop]: Abstraction has 287839 states and 1066108 transitions. [2022-01-18 16:13:49,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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 16:13:49,299 INFO L276 IsEmpty]: Start isEmpty. Operand 287839 states and 1066108 transitions. [2022-01-18 16:13:49,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:13:49,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:13:49,838 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:13:49,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-01-18 16:13:50,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-01-18 16:13:50,061 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:13:50,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:13:50,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1438054580, now seen corresponding path program 35 times [2022-01-18 16:13:50,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:13:50,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194850363] [2022-01-18 16:13:50,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:13:50,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:13:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:13:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:50,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:13:50,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194850363] [2022-01-18 16:13:50,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194850363] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:13:50,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658201150] [2022-01-18 16:13:50,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:13:50,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:13:50,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:13:50,222 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:13:50,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 16:13:50,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:13:50,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:13:50,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:13:50,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:13:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:50,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:13:51,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:51,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658201150] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:13:51,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:13:51,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 16:13:51,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831124731] [2022-01-18 16:13:51,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:13:51,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:13:51,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:13:51,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:13:51,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:13:51,010 INFO L87 Difference]: Start difference. First operand 287839 states and 1066108 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:13:56,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:13:56,960 INFO L93 Difference]: Finished difference Result 292124 states and 1079217 transitions. [2022-01-18 16:13:56,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 16:13:56,960 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 16:13:56,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:13:59,100 INFO L225 Difference]: With dead ends: 292124 [2022-01-18 16:13:59,101 INFO L226 Difference]: Without dead ends: 291998 [2022-01-18 16:13:59,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=589, Invalid=2833, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 16:13:59,101 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 233 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:13:59,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 295 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1435 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:13:59,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291998 states. [2022-01-18 16:14:06,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291998 to 288449. [2022-01-18 16:14:06,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288449 states, 288448 states have (on average 3.703249805857555) internal successors, (1068195), 288448 states have internal predecessors, (1068195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:09,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288449 states to 288449 states and 1068195 transitions. [2022-01-18 16:14:09,046 INFO L78 Accepts]: Start accepts. Automaton has 288449 states and 1068195 transitions. Word has length 25 [2022-01-18 16:14:09,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:14:09,046 INFO L470 AbstractCegarLoop]: Abstraction has 288449 states and 1068195 transitions. [2022-01-18 16:14:09,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:09,046 INFO L276 IsEmpty]: Start isEmpty. Operand 288449 states and 1068195 transitions. [2022-01-18 16:14:09,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:14:09,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:14:09,378 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:14:09,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-01-18 16:14:09,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:14:09,578 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:14:09,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:14:09,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1941831228, now seen corresponding path program 36 times [2022-01-18 16:14:09,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:14:09,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359358630] [2022-01-18 16:14:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:14:09,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:14:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:14:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:09,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:14:09,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359358630] [2022-01-18 16:14:09,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359358630] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:14:09,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618755786] [2022-01-18 16:14:09,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:14:09,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:14:09,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:14:09,669 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:14:09,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 16:14:09,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:14:09,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:14:09,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:14:09,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:14:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:09,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:14:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:10,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618755786] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:14:10,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:14:10,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 16:14:10,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707517926] [2022-01-18 16:14:10,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:14:10,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:14:10,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:14:10,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:14:10,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:14:10,057 INFO L87 Difference]: Start difference. First operand 288449 states and 1068195 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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 16:14:14,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:14:14,873 INFO L93 Difference]: Finished difference Result 294813 states and 1088732 transitions. [2022-01-18 16:14:14,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 16:14:14,882 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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 25 [2022-01-18 16:14:14,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:14:16,384 INFO L225 Difference]: With dead ends: 294813 [2022-01-18 16:14:16,384 INFO L226 Difference]: Without dead ends: 294328 [2022-01-18 16:14:16,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=771, Invalid=3261, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 16:14:16,384 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 272 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:14:16,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 356 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1510 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:14:16,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294328 states. [2022-01-18 16:14:24,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294328 to 289983. [2022-01-18 16:14:24,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289983 states, 289982 states have (on average 3.7032298556462124) internal successors, (1073870), 289982 states have internal predecessors, (1073870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:26,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289983 states to 289983 states and 1073870 transitions. [2022-01-18 16:14:26,640 INFO L78 Accepts]: Start accepts. Automaton has 289983 states and 1073870 transitions. Word has length 25 [2022-01-18 16:14:26,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:14:26,641 INFO L470 AbstractCegarLoop]: Abstraction has 289983 states and 1073870 transitions. [2022-01-18 16:14:26,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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 16:14:26,641 INFO L276 IsEmpty]: Start isEmpty. Operand 289983 states and 1073870 transitions. [2022-01-18 16:14:26,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:14:26,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:14:26,965 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:14:26,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-01-18 16:14:27,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:14:27,166 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:14:27,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:14:27,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1014514812, now seen corresponding path program 37 times [2022-01-18 16:14:27,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:14:27,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766587738] [2022-01-18 16:14:27,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:14:27,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:14:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:14:27,266 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:27,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:14:27,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766587738] [2022-01-18 16:14:27,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766587738] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:14:27,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639344578] [2022-01-18 16:14:27,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:14:27,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:14:27,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:14:27,269 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:14:27,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 16:14:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:14:27,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:14:27,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:14:28,305 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:28,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:14:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:28,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639344578] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:14:28,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:14:28,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 16:14:28,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258063400] [2022-01-18 16:14:28,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:14:28,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:14:28,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:14:28,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:14:28,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:14:28,543 INFO L87 Difference]: Start difference. First operand 289983 states and 1073870 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:31,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:14:31,944 INFO L93 Difference]: Finished difference Result 292093 states and 1079963 transitions. [2022-01-18 16:14:31,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 16:14:31,945 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 16:14:31,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:14:34,075 INFO L225 Difference]: With dead ends: 292093 [2022-01-18 16:14:34,076 INFO L226 Difference]: Without dead ends: 292068 [2022-01-18 16:14:34,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=379, Invalid=1973, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 16:14:34,076 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 259 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:14:34,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 329 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:14:34,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292068 states. [2022-01-18 16:14:41,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292068 to 290104. [2022-01-18 16:14:41,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290104 states, 290103 states have (on average 3.703291589538888) internal successors, (1074336), 290103 states have internal predecessors, (1074336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:43,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290104 states to 290104 states and 1074336 transitions. [2022-01-18 16:14:43,760 INFO L78 Accepts]: Start accepts. Automaton has 290104 states and 1074336 transitions. Word has length 25 [2022-01-18 16:14:43,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:14:43,760 INFO L470 AbstractCegarLoop]: Abstraction has 290104 states and 1074336 transitions. [2022-01-18 16:14:43,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:43,760 INFO L276 IsEmpty]: Start isEmpty. Operand 290104 states and 1074336 transitions. [2022-01-18 16:14:44,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:14:44,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:14:44,083 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:14:44,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-01-18 16:14:44,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-01-18 16:14:44,283 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:14:44,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:14:44,284 INFO L85 PathProgramCache]: Analyzing trace with hash 279299422, now seen corresponding path program 38 times [2022-01-18 16:14:44,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:14:44,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527312782] [2022-01-18 16:14:44,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:14:44,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:14:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:14:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:44,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:14:44,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527312782] [2022-01-18 16:14:44,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527312782] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:14:44,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581824670] [2022-01-18 16:14:44,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:14:44,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:14:44,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:14:44,408 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:14:44,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 16:14:44,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:14:44,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:14:44,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:14:44,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:14:44,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:44,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:14:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:44,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581824670] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:14:44,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:14:44,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 16:14:44,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480978045] [2022-01-18 16:14:44,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:14:44,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 16:14:44,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:14:44,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 16:14:44,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-01-18 16:14:44,941 INFO L87 Difference]: Start difference. First operand 290104 states and 1074336 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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 16:14:50,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:14:50,223 INFO L93 Difference]: Finished difference Result 294291 states and 1087343 transitions. [2022-01-18 16:14:50,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 16:14:50,224 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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 25 [2022-01-18 16:14:50,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:14:53,070 INFO L225 Difference]: With dead ends: 294291 [2022-01-18 16:14:53,071 INFO L226 Difference]: Without dead ends: 294046 [2022-01-18 16:14:53,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=773, Invalid=3649, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 16:14:53,071 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 249 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 1667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:14:53,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 400 Invalid, 1667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1588 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:14:53,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294046 states. [2022-01-18 16:15:01,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294046 to 291437. [2022-01-18 16:15:01,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291437 states, 291436 states have (on average 3.7028884557844606) internal successors, (1079155), 291436 states have internal predecessors, (1079155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:03,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291437 states to 291437 states and 1079155 transitions. [2022-01-18 16:15:03,906 INFO L78 Accepts]: Start accepts. Automaton has 291437 states and 1079155 transitions. Word has length 25 [2022-01-18 16:15:03,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:15:03,907 INFO L470 AbstractCegarLoop]: Abstraction has 291437 states and 1079155 transitions. [2022-01-18 16:15:03,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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 16:15:03,907 INFO L276 IsEmpty]: Start isEmpty. Operand 291437 states and 1079155 transitions. [2022-01-18 16:15:04,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:15:04,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:15:04,228 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:15:04,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-01-18 16:15:04,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:15:04,428 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:15:04,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:15:04,429 INFO L85 PathProgramCache]: Analyzing trace with hash 727557782, now seen corresponding path program 39 times [2022-01-18 16:15:04,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:15:04,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406785044] [2022-01-18 16:15:04,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:15:04,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:15:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:15:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:05,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:15:05,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406785044] [2022-01-18 16:15:05,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406785044] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:15:05,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844517368] [2022-01-18 16:15:05,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:15:05,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:15:05,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:15:05,346 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:15:05,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 16:15:05,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:15:05,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:15:05,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:15:05,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:15:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:05,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:15:05,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:05,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844517368] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:15:05,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:15:05,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 16:15:05,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378131444] [2022-01-18 16:15:05,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:15:05,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:15:05,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:15:05,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:15:05,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:15:05,894 INFO L87 Difference]: Start difference. First operand 291437 states and 1079155 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:10,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:15:10,180 INFO L93 Difference]: Finished difference Result 295235 states and 1091102 transitions. [2022-01-18 16:15:10,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 16:15:10,180 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 16:15:10,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:15:12,344 INFO L225 Difference]: With dead ends: 295235 [2022-01-18 16:15:12,344 INFO L226 Difference]: Without dead ends: 295095 [2022-01-18 16:15:12,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=649, Invalid=2773, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 16:15:12,344 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 239 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:15:12,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 277 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1356 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:15:12,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295095 states. [2022-01-18 16:15:19,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295095 to 292362. [2022-01-18 16:15:20,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292362 states, 292361 states have (on average 3.7026347563457507) internal successors, (1082506), 292361 states have internal predecessors, (1082506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:22,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292362 states to 292362 states and 1082506 transitions. [2022-01-18 16:15:22,523 INFO L78 Accepts]: Start accepts. Automaton has 292362 states and 1082506 transitions. Word has length 25 [2022-01-18 16:15:22,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:15:22,523 INFO L470 AbstractCegarLoop]: Abstraction has 292362 states and 1082506 transitions. [2022-01-18 16:15:22,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:22,523 INFO L276 IsEmpty]: Start isEmpty. Operand 292362 states and 1082506 transitions. [2022-01-18 16:15:22,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:15:22,852 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:15:22,852 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:15:22,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-01-18 16:15:23,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:15:23,052 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:15:23,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:15:23,053 INFO L85 PathProgramCache]: Analyzing trace with hash 832207754, now seen corresponding path program 40 times [2022-01-18 16:15:23,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:15:23,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960998886] [2022-01-18 16:15:23,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:15:23,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:15:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:15:23,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:23,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:15:23,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960998886] [2022-01-18 16:15:23,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960998886] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:15:23,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104725607] [2022-01-18 16:15:23,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:15:23,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:15:23,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:15:23,145 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:15:23,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 16:15:23,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:15:23,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:15:23,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:15:23,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:15:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:23,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:15:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:23,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104725607] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:15:23,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:15:23,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 16:15:23,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681208438] [2022-01-18 16:15:23,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:15:23,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:15:23,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:15:23,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:15:23,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:15:23,582 INFO L87 Difference]: Start difference. First operand 292362 states and 1082506 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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 16:15:28,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:15:28,189 INFO L93 Difference]: Finished difference Result 297667 states and 1099857 transitions. [2022-01-18 16:15:28,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 16:15:28,190 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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 25 [2022-01-18 16:15:28,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:15:29,659 INFO L225 Difference]: With dead ends: 297667 [2022-01-18 16:15:29,659 INFO L226 Difference]: Without dead ends: 297642 [2022-01-18 16:15:29,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=550, Invalid=2312, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 16:15:29,659 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 230 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:15:29,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 304 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1406 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 16:15:30,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297642 states. [2022-01-18 16:15:37,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297642 to 293583. [2022-01-18 16:15:38,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293583 states, 293582 states have (on average 3.703598994488763) internal successors, (1087310), 293582 states have internal predecessors, (1087310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:40,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293583 states to 293583 states and 1087310 transitions. [2022-01-18 16:15:40,297 INFO L78 Accepts]: Start accepts. Automaton has 293583 states and 1087310 transitions. Word has length 25 [2022-01-18 16:15:40,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:15:40,297 INFO L470 AbstractCegarLoop]: Abstraction has 293583 states and 1087310 transitions. [2022-01-18 16:15:40,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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 16:15:40,297 INFO L276 IsEmpty]: Start isEmpty. Operand 293583 states and 1087310 transitions. [2022-01-18 16:15:40,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:15:40,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:15:40,643 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:15:40,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-18 16:15:40,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-01-18 16:15:40,844 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:15:40,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:15:40,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1322581018, now seen corresponding path program 41 times [2022-01-18 16:15:40,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:15:40,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853578214] [2022-01-18 16:15:40,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:15:40,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:15:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:15:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:40,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:15:40,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853578214] [2022-01-18 16:15:40,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853578214] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:15:40,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395023526] [2022-01-18 16:15:40,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:15:40,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:15:40,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:15:40,954 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:15:40,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 16:15:40,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:15:40,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:15:40,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:15:40,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:15:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:41,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:15:41,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:41,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395023526] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:15:41,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:15:41,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 16:15:41,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108731083] [2022-01-18 16:15:41,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:15:41,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 16:15:41,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:15:41,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 16:15:41,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-01-18 16:15:41,503 INFO L87 Difference]: Start difference. First operand 293583 states and 1087310 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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 16:15:46,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:15:46,790 INFO L93 Difference]: Finished difference Result 295683 states and 1093304 transitions. [2022-01-18 16:15:46,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 16:15:46,791 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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 25 [2022-01-18 16:15:46,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:15:48,249 INFO L225 Difference]: With dead ends: 295683 [2022-01-18 16:15:48,249 INFO L226 Difference]: Without dead ends: 295490 [2022-01-18 16:15:48,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=773, Invalid=3517, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 16:15:48,249 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 260 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:15:48,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 352 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 16:15:49,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295490 states. [2022-01-18 16:15:56,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295490 to 293891. [2022-01-18 16:15:56,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293891 states, 293890 states have (on average 3.7033413862329443) internal successors, (1088375), 293890 states have internal predecessors, (1088375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:58,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293891 states to 293891 states and 1088375 transitions. [2022-01-18 16:15:58,913 INFO L78 Accepts]: Start accepts. Automaton has 293891 states and 1088375 transitions. Word has length 25 [2022-01-18 16:15:58,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:15:58,913 INFO L470 AbstractCegarLoop]: Abstraction has 293891 states and 1088375 transitions. [2022-01-18 16:15:58,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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 16:15:58,913 INFO L276 IsEmpty]: Start isEmpty. Operand 293891 states and 1088375 transitions. [2022-01-18 16:15:59,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:15:59,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:15:59,799 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:15:59,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:00,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:00,000 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:16:00,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:00,000 INFO L85 PathProgramCache]: Analyzing trace with hash 442141958, now seen corresponding path program 42 times [2022-01-18 16:16:00,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:00,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145811943] [2022-01-18 16:16:00,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:00,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:00,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:00,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145811943] [2022-01-18 16:16:00,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145811943] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:00,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812932114] [2022-01-18 16:16:00,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:16:00,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:00,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:00,164 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:16:00,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 16:16:00,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:16:00,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:00,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:16:00,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:00,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:00,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812932114] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:00,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:00,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 16:16:00,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989143612] [2022-01-18 16:16:00,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:00,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:16:00,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:00,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:16:00,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:16:00,890 INFO L87 Difference]: Start difference. First operand 293891 states and 1088375 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:05,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:05,595 INFO L93 Difference]: Finished difference Result 296367 states and 1095507 transitions. [2022-01-18 16:16:05,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 16:16:05,595 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 16:16:05,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:07,785 INFO L225 Difference]: With dead ends: 296367 [2022-01-18 16:16:07,785 INFO L226 Difference]: Without dead ends: 296289 [2022-01-18 16:16:07,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=680, Invalid=2980, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 16:16:07,785 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 249 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:07,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 360 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:16:08,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296289 states. [2022-01-18 16:16:15,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296289 to 294244. [2022-01-18 16:16:15,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294244 states, 294243 states have (on average 3.7033302406514346) internal successors, (1089679), 294243 states have internal predecessors, (1089679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:18,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294244 states to 294244 states and 1089679 transitions. [2022-01-18 16:16:18,189 INFO L78 Accepts]: Start accepts. Automaton has 294244 states and 1089679 transitions. Word has length 25 [2022-01-18 16:16:18,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:18,189 INFO L470 AbstractCegarLoop]: Abstraction has 294244 states and 1089679 transitions. [2022-01-18 16:16:18,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:18,189 INFO L276 IsEmpty]: Start isEmpty. Operand 294244 states and 1089679 transitions. [2022-01-18 16:16:19,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:16:19,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:19,312 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:19,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:19,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:19,513 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:16:19,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:19,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1643963730, now seen corresponding path program 43 times [2022-01-18 16:16:19,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:19,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633356458] [2022-01-18 16:16:19,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:19,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:19,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:19,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633356458] [2022-01-18 16:16:19,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633356458] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:19,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654330967] [2022-01-18 16:16:19,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:16:19,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:19,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:19,610 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:16:19,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 16:16:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:19,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:16:19,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:19,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:19,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:20,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654330967] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:20,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:20,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 16:16:20,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022685772] [2022-01-18 16:16:20,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:20,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:16:20,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:20,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:16:20,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:16:20,197 INFO L87 Difference]: Start difference. First operand 294244 states and 1089679 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:24,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:24,208 INFO L93 Difference]: Finished difference Result 296525 states and 1096387 transitions. [2022-01-18 16:16:24,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 16:16:24,208 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 16:16:24,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:26,410 INFO L225 Difference]: With dead ends: 296525 [2022-01-18 16:16:26,410 INFO L226 Difference]: Without dead ends: 296420 [2022-01-18 16:16:26,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=563, Invalid=2193, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 16:16:26,411 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 193 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:26,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 307 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1388 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:16:26,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296420 states. [2022-01-18 16:16:33,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296420 to 294304. [2022-01-18 16:16:34,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294304 states, 294303 states have (on average 3.7035911968277593) internal successors, (1089978), 294303 states have internal predecessors, (1089978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:36,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294304 states to 294304 states and 1089978 transitions. [2022-01-18 16:16:36,541 INFO L78 Accepts]: Start accepts. Automaton has 294304 states and 1089978 transitions. Word has length 25 [2022-01-18 16:16:36,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:36,541 INFO L470 AbstractCegarLoop]: Abstraction has 294304 states and 1089978 transitions. [2022-01-18 16:16:36,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:36,542 INFO L276 IsEmpty]: Start isEmpty. Operand 294304 states and 1089978 transitions. [2022-01-18 16:16:36,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:16:36,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:36,876 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:36,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:37,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:37,077 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:16:37,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:37,077 INFO L85 PathProgramCache]: Analyzing trace with hash -5117990, now seen corresponding path program 44 times [2022-01-18 16:16:37,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:37,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909141989] [2022-01-18 16:16:37,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:37,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:37,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:37,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:37,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909141989] [2022-01-18 16:16:37,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909141989] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:37,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331654747] [2022-01-18 16:16:37,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:16:37,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:37,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:37,193 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:16:37,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 16:16:37,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:16:37,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:37,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:16:37,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:37,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:38,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331654747] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:38,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:38,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 16:16:38,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037282890] [2022-01-18 16:16:38,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:38,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 16:16:38,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:38,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 16:16:38,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-18 16:16:38,463 INFO L87 Difference]: Start difference. First operand 294304 states and 1089978 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:43,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:43,321 INFO L93 Difference]: Finished difference Result 296678 states and 1096654 transitions. [2022-01-18 16:16:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 16:16:43,322 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 16:16:43,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:45,435 INFO L225 Difference]: With dead ends: 296678 [2022-01-18 16:16:45,435 INFO L226 Difference]: Without dead ends: 296410 [2022-01-18 16:16:45,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1827 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=923, Invalid=5239, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 16:16:45,435 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 277 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1832 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:45,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 513 Invalid, 1915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1832 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:16:45,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296410 states. [2022-01-18 16:16:53,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296410 to 294486. [2022-01-18 16:16:53,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294486 states, 294485 states have (on average 3.7033770820245513) internal successors, (1090589), 294485 states have internal predecessors, (1090589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:55,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294486 states to 294486 states and 1090589 transitions. [2022-01-18 16:16:55,692 INFO L78 Accepts]: Start accepts. Automaton has 294486 states and 1090589 transitions. Word has length 25 [2022-01-18 16:16:55,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:55,692 INFO L470 AbstractCegarLoop]: Abstraction has 294486 states and 1090589 transitions. [2022-01-18 16:16:55,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:55,692 INFO L276 IsEmpty]: Start isEmpty. Operand 294486 states and 1090589 transitions. [2022-01-18 16:16:56,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:16:56,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:56,018 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:56,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:56,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2022-01-18 16:16:56,219 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:16:56,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:56,219 INFO L85 PathProgramCache]: Analyzing trace with hash 134174410, now seen corresponding path program 45 times [2022-01-18 16:16:56,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:56,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317458306] [2022-01-18 16:16:56,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:56,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:56,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:56,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:56,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317458306] [2022-01-18 16:16:56,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317458306] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:56,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046613887] [2022-01-18 16:16:56,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:16:56,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:56,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:56,314 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:16:56,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 16:16:56,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:16:56,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:56,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:16:56,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:57,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:57,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046613887] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:57,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:57,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 16:16:57,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053786864] [2022-01-18 16:16:57,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:57,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 16:16:57,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:57,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 16:16:57,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 16:16:57,584 INFO L87 Difference]: Start difference. First operand 294486 states and 1090589 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:02,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:02,088 INFO L93 Difference]: Finished difference Result 296892 states and 1097441 transitions. [2022-01-18 16:17:02,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 16:17:02,089 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 16:17:02,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:04,208 INFO L225 Difference]: With dead ends: 296892 [2022-01-18 16:17:04,208 INFO L226 Difference]: Without dead ends: 296847 [2022-01-18 16:17:04,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=693, Invalid=3999, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 16:17:04,209 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 209 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 1848 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:04,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 472 Invalid, 1920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1848 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:17:04,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296847 states. [2022-01-18 16:17:11,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296847 to 294456. [2022-01-18 16:17:12,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294456 states, 294455 states have (on average 3.7034725170229748) internal successors, (1090506), 294455 states have internal predecessors, (1090506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:15,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294456 states to 294456 states and 1090506 transitions. [2022-01-18 16:17:15,262 INFO L78 Accepts]: Start accepts. Automaton has 294456 states and 1090506 transitions. Word has length 25 [2022-01-18 16:17:15,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:17:15,262 INFO L470 AbstractCegarLoop]: Abstraction has 294456 states and 1090506 transitions. [2022-01-18 16:17:15,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:15,262 INFO L276 IsEmpty]: Start isEmpty. Operand 294456 states and 1090506 transitions. [2022-01-18 16:17:15,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:17:15,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:17:15,788 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:17:15,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-01-18 16:17:16,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:16,003 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:17:16,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:17:16,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1483034154, now seen corresponding path program 46 times [2022-01-18 16:17:16,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:17:16,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080989792] [2022-01-18 16:17:16,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:17:16,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:17:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:16,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:16,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:16,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080989792] [2022-01-18 16:17:16,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080989792] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:16,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701765586] [2022-01-18 16:17:16,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:17:16,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:16,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:16,165 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:17:16,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 16:17:16,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:17:16,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:17:16,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:17:16,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:16,413 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:16,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:17:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:16,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701765586] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:17:16,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:17:16,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 16:17:16,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733330085] [2022-01-18 16:17:16,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:17:16,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 16:17:16,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:17:16,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 16:17:16,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 16:17:16,937 INFO L87 Difference]: Start difference. First operand 294456 states and 1090506 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:23,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:23,021 INFO L93 Difference]: Finished difference Result 296114 states and 1095132 transitions. [2022-01-18 16:17:23,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 16:17:23,021 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 16:17:23,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:25,206 INFO L225 Difference]: With dead ends: 296114 [2022-01-18 16:17:25,206 INFO L226 Difference]: Without dead ends: 295983 [2022-01-18 16:17:25,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=653, Invalid=3903, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 16:17:25,207 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 220 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:25,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 495 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1747 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 16:17:25,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295983 states. [2022-01-18 16:17:32,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295983 to 294478. [2022-01-18 16:17:33,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294478 states, 294477 states have (on average 3.703426753192949) internal successors, (1090574), 294477 states have internal predecessors, (1090574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:35,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294478 states to 294478 states and 1090574 transitions. [2022-01-18 16:17:35,221 INFO L78 Accepts]: Start accepts. Automaton has 294478 states and 1090574 transitions. Word has length 25 [2022-01-18 16:17:35,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:17:35,221 INFO L470 AbstractCegarLoop]: Abstraction has 294478 states and 1090574 transitions. [2022-01-18 16:17:35,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:35,221 INFO L276 IsEmpty]: Start isEmpty. Operand 294478 states and 1090574 transitions. [2022-01-18 16:17:35,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:17:35,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:17:35,543 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:17:35,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-01-18 16:17:35,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:35,744 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:17:35,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:17:35,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1774525126, now seen corresponding path program 47 times [2022-01-18 16:17:35,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:17:35,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926456494] [2022-01-18 16:17:35,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:17:35,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:17:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:35,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:35,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926456494] [2022-01-18 16:17:35,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926456494] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:35,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076854989] [2022-01-18 16:17:35,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:17:35,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:35,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:35,868 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:17:35,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 16:17:35,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 16:17:35,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:17:35,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:17:35,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:36,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:17:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:36,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076854989] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:17:36,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:17:36,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 16:17:36,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324046510] [2022-01-18 16:17:36,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:17:36,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 16:17:36,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:17:36,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 16:17:36,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 16:17:36,358 INFO L87 Difference]: Start difference. First operand 294478 states and 1090574 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:40,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:40,300 INFO L93 Difference]: Finished difference Result 295327 states and 1093005 transitions. [2022-01-18 16:17:40,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 16:17:40,301 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 16:17:40,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:41,735 INFO L225 Difference]: With dead ends: 295327 [2022-01-18 16:17:41,735 INFO L226 Difference]: Without dead ends: 295306 [2022-01-18 16:17:41,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 16 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=247, Invalid=1475, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:17:41,735 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 154 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:41,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 256 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 919 Invalid, 0 Unknown, 29 Unchecked, 0.4s Time] [2022-01-18 16:17:42,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295306 states. [2022-01-18 16:17:49,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295306 to 294739. [2022-01-18 16:17:50,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294739 states, 294738 states have (on average 3.7033161655436353) internal successors, (1091508), 294738 states have internal predecessors, (1091508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:52,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294739 states to 294739 states and 1091508 transitions. [2022-01-18 16:17:52,550 INFO L78 Accepts]: Start accepts. Automaton has 294739 states and 1091508 transitions. Word has length 25 [2022-01-18 16:17:52,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:17:52,550 INFO L470 AbstractCegarLoop]: Abstraction has 294739 states and 1091508 transitions. [2022-01-18 16:17:52,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:52,550 INFO L276 IsEmpty]: Start isEmpty. Operand 294739 states and 1091508 transitions. [2022-01-18 16:17:52,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:17:52,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:17:52,929 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:17:52,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-01-18 16:17:53,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:53,131 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:17:53,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:17:53,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1631955782, now seen corresponding path program 48 times [2022-01-18 16:17:53,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:17:53,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799919084] [2022-01-18 16:17:53,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:17:53,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:17:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:53,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:53,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:53,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799919084] [2022-01-18 16:17:53,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799919084] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:53,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091070311] [2022-01-18 16:17:53,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:17:53,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:53,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:53,232 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:17:53,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 16:17:53,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:17:53,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:17:53,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 16:17:53,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:53,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:53,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:17:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:53,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091070311] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:17:53,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:17:53,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-01-18 16:17:53,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242096039] [2022-01-18 16:17:53,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:17:53,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:17:53,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:17:53,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:17:53,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:17:53,918 INFO L87 Difference]: Start difference. First operand 294739 states and 1091508 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 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 16:17:57,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:57,756 INFO L93 Difference]: Finished difference Result 309184 states and 1138967 transitions. [2022-01-18 16:17:57,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 16:17:57,756 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 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 25 [2022-01-18 16:17:57,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:59,314 INFO L225 Difference]: With dead ends: 309184 [2022-01-18 16:17:59,314 INFO L226 Difference]: Without dead ends: 309077 [2022-01-18 16:17:59,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=297, Invalid=1425, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:17:59,315 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 145 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:59,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 286 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 682 Invalid, 0 Unknown, 212 Unchecked, 0.3s Time] [2022-01-18 16:17:59,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309077 states. [2022-01-18 16:18:07,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309077 to 294886. [2022-01-18 16:18:08,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294886 states, 294885 states have (on average 3.7032029435203553) internal successors, (1092019), 294885 states have internal predecessors, (1092019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:10,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294886 states to 294886 states and 1092019 transitions. [2022-01-18 16:18:10,258 INFO L78 Accepts]: Start accepts. Automaton has 294886 states and 1092019 transitions. Word has length 25 [2022-01-18 16:18:10,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:18:10,258 INFO L470 AbstractCegarLoop]: Abstraction has 294886 states and 1092019 transitions. [2022-01-18 16:18:10,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 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 16:18:10,258 INFO L276 IsEmpty]: Start isEmpty. Operand 294886 states and 1092019 transitions. [2022-01-18 16:18:11,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:18:11,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:18:11,129 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] [2022-01-18 16:18:11,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-01-18 16:18:11,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:11,351 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:18:11,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:18:11,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1079221178, now seen corresponding path program 49 times [2022-01-18 16:18:11,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:18:11,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268639814] [2022-01-18 16:18:11,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:18:11,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:18:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:18:11,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:11,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:18:11,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268639814] [2022-01-18 16:18:11,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268639814] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:18:11,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015509373] [2022-01-18 16:18:11,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:18:11,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:11,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:18:11,518 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:18:11,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 16:18:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:18:11,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 16:18:11,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:18:11,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:11,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:18:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:12,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015509373] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:18:12,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:18:12,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 16:18:12,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370839657] [2022-01-18 16:18:12,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:18:12,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 16:18:12,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:18:12,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 16:18:12,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 16:18:12,276 INFO L87 Difference]: Start difference. First operand 294886 states and 1092019 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:18,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:18:18,376 INFO L93 Difference]: Finished difference Result 363390 states and 1340875 transitions. [2022-01-18 16:18:18,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-18 16:18:18,377 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 16:18:18,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:18:20,221 INFO L225 Difference]: With dead ends: 363390 [2022-01-18 16:18:20,221 INFO L226 Difference]: Without dead ends: 362845 [2022-01-18 16:18:20,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=898, Invalid=4214, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 16:18:20,222 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 315 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:18:20,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 611 Invalid, 2038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 16:18:21,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362845 states. [2022-01-18 16:18:29,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362845 to 295410. [2022-01-18 16:18:29,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295410 states, 295409 states have (on average 3.7028628105440253) internal successors, (1093859), 295409 states have internal predecessors, (1093859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:31,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295410 states to 295410 states and 1093859 transitions. [2022-01-18 16:18:31,775 INFO L78 Accepts]: Start accepts. Automaton has 295410 states and 1093859 transitions. Word has length 25 [2022-01-18 16:18:31,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:18:31,775 INFO L470 AbstractCegarLoop]: Abstraction has 295410 states and 1093859 transitions. [2022-01-18 16:18:31,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:31,775 INFO L276 IsEmpty]: Start isEmpty. Operand 295410 states and 1093859 transitions. [2022-01-18 16:18:32,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:18:32,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:18:32,111 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:18:32,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-18 16:18:32,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-01-18 16:18:32,312 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:18:32,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:18:32,312 INFO L85 PathProgramCache]: Analyzing trace with hash 762260422, now seen corresponding path program 50 times [2022-01-18 16:18:32,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:18:32,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637573767] [2022-01-18 16:18:32,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:18:32,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:18:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:18:32,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:32,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:18:32,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637573767] [2022-01-18 16:18:32,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637573767] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:18:32,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833217452] [2022-01-18 16:18:32,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:18:32,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:32,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:18:32,404 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:18:32,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 16:18:32,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:18:32,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:18:32,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:18:32,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:18:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:32,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:18:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:33,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833217452] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:18:33,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:18:33,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 16:18:33,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133018901] [2022-01-18 16:18:33,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:18:33,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 16:18:33,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:18:33,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 16:18:33,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-01-18 16:18:33,562 INFO L87 Difference]: Start difference. First operand 295410 states and 1093859 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:36,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:18:36,865 INFO L93 Difference]: Finished difference Result 297973 states and 1101719 transitions. [2022-01-18 16:18:36,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 16:18:36,865 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 16:18:36,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:18:39,048 INFO L225 Difference]: With dead ends: 297973 [2022-01-18 16:18:39,049 INFO L226 Difference]: Without dead ends: 297734 [2022-01-18 16:18:39,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:18:39,049 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 221 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:18:39,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 340 Invalid, 1551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1312 Invalid, 0 Unknown, 171 Unchecked, 0.5s Time] [2022-01-18 16:18:39,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297734 states. [2022-01-18 16:18:46,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297734 to 295781. [2022-01-18 16:18:46,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295781 states, 295780 states have (on average 3.702823044154439) internal successors, (1095221), 295780 states have internal predecessors, (1095221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:49,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295781 states to 295781 states and 1095221 transitions. [2022-01-18 16:18:49,217 INFO L78 Accepts]: Start accepts. Automaton has 295781 states and 1095221 transitions. Word has length 25 [2022-01-18 16:18:49,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:18:49,217 INFO L470 AbstractCegarLoop]: Abstraction has 295781 states and 1095221 transitions. [2022-01-18 16:18:49,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:49,217 INFO L276 IsEmpty]: Start isEmpty. Operand 295781 states and 1095221 transitions. [2022-01-18 16:18:49,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:18:49,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:18:49,562 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] [2022-01-18 16:18:49,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-01-18 16:18:49,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-01-18 16:18:49,763 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:18:49,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:18:49,763 INFO L85 PathProgramCache]: Analyzing trace with hash -649407290, now seen corresponding path program 51 times [2022-01-18 16:18:49,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:18:49,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172354206] [2022-01-18 16:18:49,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:18:49,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:18:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:18:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:49,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:18:49,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172354206] [2022-01-18 16:18:49,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172354206] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:18:49,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327993898] [2022-01-18 16:18:49,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:18:49,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:49,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:18:49,888 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:18:49,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 16:18:49,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:18:49,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:18:49,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 16:18:49,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:18:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:50,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:18:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:50,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327993898] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:18:50,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:18:50,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 16:18:50,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363822527] [2022-01-18 16:18:50,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:18:50,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 16:18:50,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:18:50,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 16:18:50,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-01-18 16:18:50,468 INFO L87 Difference]: Start difference. First operand 295781 states and 1095221 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:56,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:18:56,701 INFO L93 Difference]: Finished difference Result 302724 states and 1117035 transitions. [2022-01-18 16:18:56,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-18 16:18:56,702 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 16:18:56,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:18:58,953 INFO L225 Difference]: With dead ends: 302724 [2022-01-18 16:18:58,953 INFO L226 Difference]: Without dead ends: 302050 [2022-01-18 16:18:58,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1473, Invalid=5837, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 16:18:58,953 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 423 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:18:58,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 478 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 16:18:59,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302050 states. [2022-01-18 16:19:07,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302050 to 296088. [2022-01-18 16:19:08,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296088 states, 296087 states have (on average 3.703293288796874) internal successors, (1096497), 296087 states have internal predecessors, (1096497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:10,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296088 states to 296088 states and 1096497 transitions. [2022-01-18 16:19:10,497 INFO L78 Accepts]: Start accepts. Automaton has 296088 states and 1096497 transitions. Word has length 25 [2022-01-18 16:19:10,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:19:10,497 INFO L470 AbstractCegarLoop]: Abstraction has 296088 states and 1096497 transitions. [2022-01-18 16:19:10,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:10,497 INFO L276 IsEmpty]: Start isEmpty. Operand 296088 states and 1096497 transitions. [2022-01-18 16:19:10,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:19:10,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:19:10,829 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] [2022-01-18 16:19:10,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-01-18 16:19:11,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-01-18 16:19:11,029 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:19:11,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:19:11,030 INFO L85 PathProgramCache]: Analyzing trace with hash 329150154, now seen corresponding path program 52 times [2022-01-18 16:19:11,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:19:11,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620711734] [2022-01-18 16:19:11,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:19:11,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:19:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:11,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:19:11,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620711734] [2022-01-18 16:19:11,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620711734] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:19:11,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182083463] [2022-01-18 16:19:11,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:19:11,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:11,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:19:11,141 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:19:11,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 16:19:11,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:19:11,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:19:11,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 16:19:11,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:19:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:11,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:19:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:11,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182083463] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:19:11,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:19:11,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 16:19:11,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264513328] [2022-01-18 16:19:11,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:19:11,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:19:11,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:19:11,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:19:11,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:19:11,737 INFO L87 Difference]: Start difference. First operand 296088 states and 1096497 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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 16:19:19,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:19:19,364 INFO L93 Difference]: Finished difference Result 338251 states and 1259640 transitions. [2022-01-18 16:19:19,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-18 16:19:19,364 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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 25 [2022-01-18 16:19:19,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:19:21,137 INFO L225 Difference]: With dead ends: 338251 [2022-01-18 16:19:21,137 INFO L226 Difference]: Without dead ends: 337273 [2022-01-18 16:19:21,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3223 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2042, Invalid=7464, Unknown=0, NotChecked=0, Total=9506 [2022-01-18 16:19:21,137 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 600 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 2139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:19:21,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 577 Invalid, 2139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1821 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 16:19:21,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337273 states. [2022-01-18 16:19:30,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337273 to 296607. [2022-01-18 16:19:31,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296607 states, 296606 states have (on average 3.703171884587635) internal successors, (1098383), 296606 states have internal predecessors, (1098383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:34,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296607 states to 296607 states and 1098383 transitions. [2022-01-18 16:19:34,360 INFO L78 Accepts]: Start accepts. Automaton has 296607 states and 1098383 transitions. Word has length 25 [2022-01-18 16:19:34,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:19:34,361 INFO L470 AbstractCegarLoop]: Abstraction has 296607 states and 1098383 transitions. [2022-01-18 16:19:34,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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 16:19:34,361 INFO L276 IsEmpty]: Start isEmpty. Operand 296607 states and 1098383 transitions. [2022-01-18 16:19:34,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:19:34,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:19:34,830 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:19:34,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-01-18 16:19:35,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:35,053 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:19:35,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:19:35,053 INFO L85 PathProgramCache]: Analyzing trace with hash 996526086, now seen corresponding path program 53 times [2022-01-18 16:19:35,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:19:35,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240142074] [2022-01-18 16:19:35,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:19:35,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:19:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:35,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:19:35,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240142074] [2022-01-18 16:19:35,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240142074] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:19:35,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140243689] [2022-01-18 16:19:35,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:19:35,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:35,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:19:35,231 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:19:35,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 16:19:35,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:19:35,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:19:35,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:19:35,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:19:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:35,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:19:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:35,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140243689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:19:35,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:19:35,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 16:19:35,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404986976] [2022-01-18 16:19:35,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:19:35,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 16:19:35,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:19:35,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 16:19:35,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-01-18 16:19:35,795 INFO L87 Difference]: Start difference. First operand 296607 states and 1098383 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:40,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:19:40,596 INFO L93 Difference]: Finished difference Result 297220 states and 1100215 transitions. [2022-01-18 16:19:40,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 16:19:40,596 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 16:19:40,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:19:42,407 INFO L225 Difference]: With dead ends: 297220 [2022-01-18 16:19:42,407 INFO L226 Difference]: Without dead ends: 297205 [2022-01-18 16:19:42,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:19:42,407 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 153 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:19:42,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 248 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 815 Invalid, 0 Unknown, 89 Unchecked, 0.4s Time] [2022-01-18 16:19:43,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297205 states. [2022-01-18 16:19:50,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297205 to 296766. [2022-01-18 16:19:50,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296766 states, 296765 states have (on average 3.7030748235135547) internal successors, (1098943), 296765 states have internal predecessors, (1098943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:52,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296766 states to 296766 states and 1098943 transitions. [2022-01-18 16:19:52,999 INFO L78 Accepts]: Start accepts. Automaton has 296766 states and 1098943 transitions. Word has length 25 [2022-01-18 16:19:52,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:19:52,999 INFO L470 AbstractCegarLoop]: Abstraction has 296766 states and 1098943 transitions. [2022-01-18 16:19:52,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:52,999 INFO L276 IsEmpty]: Start isEmpty. Operand 296766 states and 1098943 transitions. [2022-01-18 16:19:53,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:19:53,345 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:19:53,345 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:19:53,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-01-18 16:19:53,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-01-18 16:19:53,545 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:19:53,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:19:53,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1530415618, now seen corresponding path program 54 times [2022-01-18 16:19:53,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:19:53,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813814406] [2022-01-18 16:19:53,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:19:53,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:19:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:53,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:19:53,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813814406] [2022-01-18 16:19:53,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813814406] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:19:53,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038136573] [2022-01-18 16:19:53,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:19:53,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:53,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:19:53,642 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:19:53,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 16:19:53,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:19:53,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:19:53,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:19:53,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:19:53,792 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:53,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:19:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:54,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038136573] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:19:54,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:19:54,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 16:19:54,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133969390] [2022-01-18 16:19:54,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:19:54,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 16:19:54,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:19:54,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 16:19:54,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-01-18 16:19:54,045 INFO L87 Difference]: Start difference. First operand 296766 states and 1098943 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:58,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:19:58,134 INFO L93 Difference]: Finished difference Result 298225 states and 1103300 transitions. [2022-01-18 16:19:58,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 16:19:58,135 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 16:19:58,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:19:59,686 INFO L225 Difference]: With dead ends: 298225 [2022-01-18 16:19:59,686 INFO L226 Difference]: Without dead ends: 298184 [2022-01-18 16:19:59,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 11 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=249, Invalid=1233, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 16:19:59,686 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 173 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:19:59,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 305 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1267 Invalid, 0 Unknown, 59 Unchecked, 0.5s Time] [2022-01-18 16:19:59,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298184 states. [2022-01-18 16:20:08,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298184 to 296648. [2022-01-18 16:20:08,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296648 states, 296647 states have (on average 3.703132005380132) internal successors, (1098523), 296647 states have internal predecessors, (1098523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:10,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296648 states to 296648 states and 1098523 transitions. [2022-01-18 16:20:10,672 INFO L78 Accepts]: Start accepts. Automaton has 296648 states and 1098523 transitions. Word has length 25 [2022-01-18 16:20:10,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:10,672 INFO L470 AbstractCegarLoop]: Abstraction has 296648 states and 1098523 transitions. [2022-01-18 16:20:10,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:10,672 INFO L276 IsEmpty]: Start isEmpty. Operand 296648 states and 1098523 transitions. [2022-01-18 16:20:11,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:20:11,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:11,022 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:11,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-01-18 16:20:11,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-01-18 16:20:11,223 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:20:11,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:11,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1856261848, now seen corresponding path program 55 times [2022-01-18 16:20:11,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:11,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421683982] [2022-01-18 16:20:11,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:11,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:11,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:11,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421683982] [2022-01-18 16:20:11,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421683982] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:11,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535799477] [2022-01-18 16:20:11,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:20:11,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:11,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:11,334 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:11,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 16:20:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:11,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:20:11,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:11,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:11,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:11,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535799477] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:11,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:11,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 16:20:11,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956646001] [2022-01-18 16:20:11,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:11,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 16:20:11,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:11,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 16:20:11,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-18 16:20:11,773 INFO L87 Difference]: Start difference. First operand 296648 states and 1098523 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:15,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:15,419 INFO L93 Difference]: Finished difference Result 297370 states and 1100731 transitions. [2022-01-18 16:20:15,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 16:20:15,419 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 16:20:15,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:16,999 INFO L225 Difference]: With dead ends: 297370 [2022-01-18 16:20:16,999 INFO L226 Difference]: Without dead ends: 297299 [2022-01-18 16:20:16,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:20:16,999 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 136 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:16,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 155 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 675 Invalid, 0 Unknown, 71 Unchecked, 0.3s Time] [2022-01-18 16:20:17,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297299 states. Received shutdown request... [2022-01-18 16:20:20,773 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 16:20:20,787 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 16:20:20,787 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 16:20:20,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-01-18 16:20:20,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:20,973 WARN L594 AbstractCegarLoop]: Verification canceled: while executing MinimizeSevpa. [2022-01-18 16:20:20,975 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 16:20:20,975 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 16:20:20,975 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 16:20:20,977 INFO L732 BasicCegarLoop]: Path program histogram: [55, 22, 22, 2, 2, 1, 1] [2022-01-18 16:20:20,979 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 16:20:20,979 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 16:20:20,982 INFO L202 PluginConnector]: Adding new model mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 04:20:20 BasicIcfg [2022-01-18 16:20:20,983 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 16:20:20,983 INFO L158 Benchmark]: Toolchain (without parser) took 628652.50ms. Allocated memory was 375.4MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 337.1MB in the beginning and 9.1GB in the end (delta: -8.7GB). Peak memory consumption was 7.5GB. Max. memory is 16.0GB. [2022-01-18 16:20:20,983 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 375.4MB. Free memory was 338.3MB in the beginning and 338.2MB in the end (delta: 162.3kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 16:20:20,983 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.35ms. Allocated memory is still 375.4MB. Free memory was 337.1MB in the beginning and 335.5MB in the end (delta: 1.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2022-01-18 16:20:20,983 INFO L158 Benchmark]: Boogie Preprocessor took 19.38ms. Allocated memory is still 375.4MB. Free memory was 335.5MB in the beginning and 334.6MB in the end (delta: 916.6kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 16:20:20,983 INFO L158 Benchmark]: RCFGBuilder took 181.24ms. Allocated memory is still 375.4MB. Free memory was 334.6MB in the beginning and 325.2MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 16:20:20,983 INFO L158 Benchmark]: TraceAbstraction took 628422.40ms. Allocated memory was 375.4MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 324.7MB in the beginning and 9.1GB in the end (delta: -8.7GB). Peak memory consumption was 7.5GB. Max. memory is 16.0GB. [2022-01-18 16:20:20,984 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13ms. Allocated memory is still 375.4MB. Free memory was 338.3MB in the beginning and 338.2MB in the end (delta: 162.3kB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 23.35ms. Allocated memory is still 375.4MB. Free memory was 337.1MB in the beginning and 335.5MB in the end (delta: 1.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 19.38ms. Allocated memory is still 375.4MB. Free memory was 335.5MB in the beginning and 334.6MB in the end (delta: 916.6kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 181.24ms. Allocated memory is still 375.4MB. Free memory was 334.6MB in the beginning and 325.2MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 628422.40ms. Allocated memory was 375.4MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 324.7MB in the beginning and 9.1GB in the end (delta: -8.7GB). Peak memory consumption was 7.5GB. 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: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 39 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 628.3s, OverallIterations: 105, TraceHistogramMax: 3, PathProgramHistogramMax: 55, EmptinessCheckTime: 14.2s, AutomataDifference: 229.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19180 SdHoareTripleChecker+Valid, 33.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19180 mSDsluCounter, 21786 SdHoareTripleChecker+Invalid, 26.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2353 IncrementalHoareTripleChecker+Unchecked, 31924 mSDsCounter, 7018 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 62998 IncrementalHoareTripleChecker+Invalid, 72369 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7018 mSolverCounterUnsat, 2996 mSDtfsCounter, 62998 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6938 GetRequests, 3475 SyntacticMatches, 253 SemanticMatches, 3210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43862 ImplicationChecksByTransitivity, 64.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=296766occurred in iteration=103, InterpolantAutomatonStates: 3083, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 317.7s AutomataMinimizationTime, 105 MinimizatonAttempts, 824374 StatesRemovedByMinimization, 104 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 41.2s InterpolantComputationTime, 4663 NumberOfCodeBlocks, 4656 NumberOfCodeBlocksAsserted, 338 NumberOfCheckSat, 6606 ConstructedInterpolants, 117 QuantifiedInterpolants, 53779 SizeOfPredicates, 184 NumberOfNonLiveVariables, 5952 ConjunctsInSsa, 1215 ConjunctsInUnsatCore, 303 InterpolantComputations, 10 PerfectInterpolantSequences, 371/2248 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