/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/nonblocking-cntr.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 16:10:51,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 16:10:51,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 16:10:51,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-18 16:10:51,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-18 16:10:51,075 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-18 16:10:51,076 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-18 16:10:51,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-18 16:10:51,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-18 16:10:51,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-18 16:10:51,081 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-18 16:10:51,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-18 16:10:51,082 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-18 16:10:51,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-18 16:10:51,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-18 16:10:51,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-18 16:10:51,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-18 16:10:51,085 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-18 16:10:51,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-18 16:10:51,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-18 16:10:51,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-18 16:10:51,088 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-18 16:10:51,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-18 16:10:51,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-18 16:10:51,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-18 16:10:51,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 16:10:51,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 16:10:51,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 16:10:51,097 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 16:10:51,109 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 16:10:51,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 16:10:51,109 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 16:10:51,109 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 16:10:51,110 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 16:10:51,110 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 16:10:51,110 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 16:10:51,110 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 16:10:51,111 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 16:10:51,111 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 16:10:51,111 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 16:10:51,111 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 16:10:51,111 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 16:10:51,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 16:10:51,111 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 16:10:51,111 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 16:10:51,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 16:10:51,112 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 16:10:51,112 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 16:10:51,112 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 16:10:51,112 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 16:10:51,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 16:10:51,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 16:10:51,112 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 16:10:51,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 16:10:51,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 16:10:51,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 16:10:51,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 16:10:51,113 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 16:10:51,113 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 16:10:51,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 16:10:51,113 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 16:10:51,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 16:10:51,113 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 16:10:51,114 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 16:10:51,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 16:10:51,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 16:10:51,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 16:10:51,322 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 16:10:51,324 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 16:10:51,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl [2022-01-18 16:10:51,325 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl' [2022-01-18 16:10:51,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 16:10:51,345 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 16:10:51,348 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 16:10:51,348 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 16:10:51,349 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 16:10:51,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:10:51" (1/1) ... [2022-01-18 16:10:51,367 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:10:51" (1/1) ... [2022-01-18 16:10:51,371 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 16:10:51,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 16:10:51,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 16:10:51,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 16:10:51,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 16:10:51,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:10:51" (1/1) ... [2022-01-18 16:10:51,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:10:51" (1/1) ... [2022-01-18 16:10:51,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:10:51" (1/1) ... [2022-01-18 16:10:51,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:10:51" (1/1) ... [2022-01-18 16:10:51,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:10:51" (1/1) ... [2022-01-18 16:10:51,381 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:10:51" (1/1) ... [2022-01-18 16:10:51,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:10:51" (1/1) ... [2022-01-18 16:10:51,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 16:10:51,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 16:10:51,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 16:10:51,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 16:10:51,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:10:51" (1/1) ... [2022-01-18 16:10:51,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 16:10:51,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:51,401 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 16:10:51,407 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 16:10:51,423 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 16:10:51,423 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 16:10:51,424 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 16:10:51,424 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 16:10:51,424 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 16:10:51,424 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 16:10:51,424 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 16:10:51,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 16:10:51,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 16:10:51,425 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 16:10:51,455 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 16:10:51,456 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 16:10:51,541 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 16:10:51,550 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 16:10:51,550 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 16:10:51,551 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:10:51 BoogieIcfgContainer [2022-01-18 16:10:51,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 16:10:51,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 16:10:51,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 16:10:51,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 16:10:51,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:10:51" (1/2) ... [2022-01-18 16:10:51,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49dbc259 and model type nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 04:10:51, skipping insertion in model container [2022-01-18 16:10:51,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:10:51" (2/2) ... [2022-01-18 16:10:51,571 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-cntr.wvr.bpl [2022-01-18 16:10:51,574 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 16:10:51,574 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 16:10:51,574 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 16:10:51,574 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 16:10:51,609 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 16:10:51,645 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 16:10:51,650 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 16:10:51,650 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 16:10:51,656 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2022-01-18 16:10:51,667 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 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 16:10:51,669 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 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 16:10:51,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 16:10:51,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:51,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:10:51,674 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:10:51,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:51,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1631855703, now seen corresponding path program 1 times [2022-01-18 16:10:51,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:51,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977324967] [2022-01-18 16:10:51,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:51,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:51,795 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 16:10:51,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:51,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977324967] [2022-01-18 16:10:51,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977324967] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:10:51,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:10:51,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 16:10:51,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654288557] [2022-01-18 16:10:51,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:10:51,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:10:51,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:51,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:10:51,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:10:51,819 INFO L87 Difference]: Start difference. First operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 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) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 16:10:51,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:51,855 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2022-01-18 16:10:51,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 16:10:51,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 16:10:51,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:51,866 INFO L225 Difference]: With dead ends: 43 [2022-01-18 16:10:51,866 INFO L226 Difference]: Without dead ends: 43 [2022-01-18 16:10:51,867 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 16:10:51,871 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:51,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 30 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:10:51,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-18 16:10:51,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-01-18 16:10:51,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2022-01-18 16:10:51,895 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2022-01-18 16:10:51,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:51,895 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2022-01-18 16:10:51,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 16:10:51,895 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2022-01-18 16:10:51,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 16:10:51,896 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:51,896 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 16:10:51,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 16:10:51,896 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:10:51,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:51,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1473491929, now seen corresponding path program 1 times [2022-01-18 16:10:51,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:51,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990840203] [2022-01-18 16:10:51,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:51,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:51,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:51,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:10:51,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:51,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990840203] [2022-01-18 16:10:51,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990840203] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:10:51,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:10:51,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 16:10:51,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670329701] [2022-01-18 16:10:51,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:10:51,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 16:10:51,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:51,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 16:10:51,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:10:51,980 INFO L87 Difference]: Start difference. First operand 38 states and 67 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 16:10:52,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:52,022 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2022-01-18 16:10:52,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 16:10:52,023 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 16:10:52,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:52,025 INFO L225 Difference]: With dead ends: 50 [2022-01-18 16:10:52,025 INFO L226 Difference]: Without dead ends: 50 [2022-01-18 16:10:52,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:10:52,030 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:52,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 27 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:10:52,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-18 16:10:52,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2022-01-18 16:10:52,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2022-01-18 16:10:52,036 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2022-01-18 16:10:52,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:52,036 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2022-01-18 16:10:52,036 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 16:10:52,036 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2022-01-18 16:10:52,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:10:52,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:52,037 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 16:10:52,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 16:10:52,037 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:10:52,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:52,038 INFO L85 PathProgramCache]: Analyzing trace with hash 917506533, now seen corresponding path program 1 times [2022-01-18 16:10:52,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:52,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593446583] [2022-01-18 16:10:52,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:52,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:52,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:52,106 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 16:10:52,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:52,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593446583] [2022-01-18 16:10:52,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593446583] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:52,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326307076] [2022-01-18 16:10:52,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:52,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:52,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:52,108 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 16:10:52,118 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 16:10:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:52,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 16:10:52,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:52,253 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 16:10:52,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:52,350 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 16:10:52,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326307076] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:52,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:52,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 6 [2022-01-18 16:10:52,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614817554] [2022-01-18 16:10:52,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:52,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 16:10:52,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:52,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 16:10:52,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:10:52,352 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 16:10:52,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:52,381 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2022-01-18 16:10:52,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 16:10:52,381 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 16:10:52,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:52,382 INFO L225 Difference]: With dead ends: 99 [2022-01-18 16:10:52,382 INFO L226 Difference]: Without dead ends: 78 [2022-01-18 16:10:52,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:10:52,383 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:52,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 58 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:10:52,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-18 16:10:52,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2022-01-18 16:10:52,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:52,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2022-01-18 16:10:52,389 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 19 [2022-01-18 16:10:52,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:52,389 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2022-01-18 16:10:52,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 16:10:52,390 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2022-01-18 16:10:52,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:10:52,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:52,390 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 16:10:52,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-18 16:10:52,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:52,607 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:10:52,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:52,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1069238711, now seen corresponding path program 2 times [2022-01-18 16:10:52,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:52,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734917575] [2022-01-18 16:10:52,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:52,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:52,663 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 16:10:52,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:52,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734917575] [2022-01-18 16:10:52,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734917575] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:52,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080930522] [2022-01-18 16:10:52,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:10:52,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:52,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:52,665 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 16:10:52,666 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 16:10:52,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:10:52,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:52,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 16:10:52,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:52,773 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 16:10:52,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:52,883 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 16:10:52,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080930522] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:52,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:52,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 16:10:52,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068050943] [2022-01-18 16:10:52,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:52,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 16:10:52,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:52,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 16:10:52,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-01-18 16:10:52,884 INFO L87 Difference]: Start difference. First operand 59 states and 112 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 16:10:52,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:52,918 INFO L93 Difference]: Finished difference Result 80 states and 151 transitions. [2022-01-18 16:10:52,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 16:10:52,919 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 19 [2022-01-18 16:10:52,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:52,919 INFO L225 Difference]: With dead ends: 80 [2022-01-18 16:10:52,919 INFO L226 Difference]: Without dead ends: 77 [2022-01-18 16:10:52,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-01-18 16:10:52,920 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:52,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 59 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:10:52,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-18 16:10:52,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2022-01-18 16:10:52,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:52,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2022-01-18 16:10:52,925 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 19 [2022-01-18 16:10:52,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:52,926 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2022-01-18 16:10:52,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 16:10:52,926 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2022-01-18 16:10:52,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 16:10:52,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:52,926 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 16:10:52,957 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 16:10:53,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-18 16:10:53,143 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:10:53,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:53,144 INFO L85 PathProgramCache]: Analyzing trace with hash 859525155, now seen corresponding path program 3 times [2022-01-18 16:10:53,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:53,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86784977] [2022-01-18 16:10:53,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:53,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:53,200 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 16:10:53,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:53,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86784977] [2022-01-18 16:10:53,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86784977] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:53,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328175225] [2022-01-18 16:10:53,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:10:53,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:53,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:53,202 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 16:10:53,205 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 16:10:53,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:10:53,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:53,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 16:10:53,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:53,396 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 16:10:53,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:53,497 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 16:10:53,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328175225] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:53,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:53,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 16:10:53,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112051101] [2022-01-18 16:10:53,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:53,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 16:10:53,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:53,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 16:10:53,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-01-18 16:10:53,508 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 16:10:53,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:53,835 INFO L93 Difference]: Finished difference Result 208 states and 386 transitions. [2022-01-18 16:10:53,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 16:10:53,835 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 21 [2022-01-18 16:10:53,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:53,836 INFO L225 Difference]: With dead ends: 208 [2022-01-18 16:10:53,836 INFO L226 Difference]: Without dead ends: 202 [2022-01-18 16:10:53,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=367, Invalid=893, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:10:53,837 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 213 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:53,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 93 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:10:53,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-18 16:10:53,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 90. [2022-01-18 16:10:53,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:53,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 181 transitions. [2022-01-18 16:10:53,844 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 181 transitions. Word has length 21 [2022-01-18 16:10:53,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:53,844 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 181 transitions. [2022-01-18 16:10:53,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 16:10:53,844 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 181 transitions. [2022-01-18 16:10:53,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 16:10:53,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:53,845 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 16:10:53,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 16:10:54,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:54,061 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:10:54,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:54,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1109337493, now seen corresponding path program 4 times [2022-01-18 16:10:54,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:54,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069270343] [2022-01-18 16:10:54,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:54,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:54,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:54,105 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 16:10:54,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:54,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069270343] [2022-01-18 16:10:54,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069270343] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:54,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461702585] [2022-01-18 16:10:54,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:10:54,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:54,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:54,107 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 16:10:54,108 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 16:10:54,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:10:54,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:54,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 16:10:54,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:54,267 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 16:10:54,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:54,379 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 16:10:54,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461702585] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:54,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:54,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 15 [2022-01-18 16:10:54,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188972990] [2022-01-18 16:10:54,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:54,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 16:10:54,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:54,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 16:10:54,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2022-01-18 16:10:54,381 INFO L87 Difference]: Start difference. First operand 90 states and 181 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:54,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:54,628 INFO L93 Difference]: Finished difference Result 170 states and 325 transitions. [2022-01-18 16:10:54,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 16:10:54,629 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 16:10:54,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:54,630 INFO L225 Difference]: With dead ends: 170 [2022-01-18 16:10:54,630 INFO L226 Difference]: Without dead ends: 166 [2022-01-18 16:10:54,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:10:54,631 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 136 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:54,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 44 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:10:54,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-01-18 16:10:54,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 92. [2022-01-18 16:10:54,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 183 transitions. [2022-01-18 16:10:54,635 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 183 transitions. Word has length 21 [2022-01-18 16:10:54,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:54,635 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 183 transitions. [2022-01-18 16:10:54,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:54,635 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 183 transitions. [2022-01-18 16:10:54,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:10:54,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:54,636 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 16:10:54,653 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 16:10:54,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:54,837 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:10:54,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:54,837 INFO L85 PathProgramCache]: Analyzing trace with hash 446728737, now seen corresponding path program 5 times [2022-01-18 16:10:54,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:54,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638486458] [2022-01-18 16:10:54,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:54,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:54,888 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 16:10:54,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:54,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638486458] [2022-01-18 16:10:54,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638486458] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:54,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726910016] [2022-01-18 16:10:54,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:10:54,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:54,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:54,891 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 16:10:54,891 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 16:10:54,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:10:54,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:54,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 16:10:54,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:54,982 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 16:10:54,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:55,092 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 16:10:55,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726910016] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:55,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:55,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 7] total 9 [2022-01-18 16:10:55,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802040237] [2022-01-18 16:10:55,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:55,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 16:10:55,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:55,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 16:10:55,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:10:55,094 INFO L87 Difference]: Start difference. First operand 92 states and 183 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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 16:10:55,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:55,130 INFO L93 Difference]: Finished difference Result 190 states and 376 transitions. [2022-01-18 16:10:55,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 16:10:55,130 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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 16:10:55,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:55,132 INFO L225 Difference]: With dead ends: 190 [2022-01-18 16:10:55,132 INFO L226 Difference]: Without dead ends: 163 [2022-01-18 16:10:55,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:10:55,133 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 50 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:55,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 103 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:10:55,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-18 16:10:55,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 120. [2022-01-18 16:10:55,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0840336134453783) internal successors, (248), 119 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:55,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 248 transitions. [2022-01-18 16:10:55,146 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 248 transitions. Word has length 23 [2022-01-18 16:10:55,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:55,146 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 248 transitions. [2022-01-18 16:10:55,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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 16:10:55,146 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 248 transitions. [2022-01-18 16:10:55,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:10:55,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:55,155 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 16:10:55,171 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 16:10:55,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:55,356 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:10:55,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:55,356 INFO L85 PathProgramCache]: Analyzing trace with hash -948358029, now seen corresponding path program 6 times [2022-01-18 16:10:55,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:55,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938000013] [2022-01-18 16:10:55,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:55,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:55,482 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 16:10:55,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:55,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938000013] [2022-01-18 16:10:55,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938000013] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:55,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410522492] [2022-01-18 16:10:55,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:10:55,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:55,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:55,484 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 16:10:55,485 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 16:10:55,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:10:55,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:55,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 16:10:55,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:55,687 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 16:10:55,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:56,079 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 16:10:56,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410522492] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:56,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:56,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 16:10:56,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793989420] [2022-01-18 16:10:56,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:56,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 16:10:56,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:56,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 16:10:56,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-01-18 16:10:56,080 INFO L87 Difference]: Start difference. First operand 120 states and 248 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 16:10:57,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:57,546 INFO L93 Difference]: Finished difference Result 529 states and 1017 transitions. [2022-01-18 16:10:57,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 16:10:57,547 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 23 [2022-01-18 16:10:57,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:57,549 INFO L225 Difference]: With dead ends: 529 [2022-01-18 16:10:57,549 INFO L226 Difference]: Without dead ends: 493 [2022-01-18 16:10:57,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=948, Invalid=2834, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 16:10:57,550 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 324 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:57,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 130 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:10:57,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-01-18 16:10:57,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 207. [2022-01-18 16:10:57,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.150485436893204) internal successors, (443), 206 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:57,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 443 transitions. [2022-01-18 16:10:57,558 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 443 transitions. Word has length 23 [2022-01-18 16:10:57,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:57,558 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 443 transitions. [2022-01-18 16:10:57,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 16:10:57,558 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 443 transitions. [2022-01-18 16:10:57,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:10:57,559 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:57,559 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 16:10:57,574 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 16:10:57,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:57,775 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:10:57,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:57,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1017367007, now seen corresponding path program 7 times [2022-01-18 16:10:57,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:57,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754448963] [2022-01-18 16:10:57,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:57,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:57,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:57,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754448963] [2022-01-18 16:10:57,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754448963] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:57,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272768111] [2022-01-18 16:10:57,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:10:57,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:57,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:57,839 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 16:10:57,840 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 16:10:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:57,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 16:10:57,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:58,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:58,212 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 16:10:58,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272768111] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:58,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:58,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-01-18 16:10:58,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697768758] [2022-01-18 16:10:58,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:58,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 16:10:58,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:58,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 16:10:58,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-01-18 16:10:58,213 INFO L87 Difference]: Start difference. First operand 207 states and 443 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 16:10:58,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:58,510 INFO L93 Difference]: Finished difference Result 415 states and 857 transitions. [2022-01-18 16:10:58,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 16:10:58,510 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 16:10:58,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:58,512 INFO L225 Difference]: With dead ends: 415 [2022-01-18 16:10:58,512 INFO L226 Difference]: Without dead ends: 411 [2022-01-18 16:10:58,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=864, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:10:58,513 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 229 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:58,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 67 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:10:58,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-01-18 16:10:58,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 259. [2022-01-18 16:10:58,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.197674418604651) internal successors, (567), 258 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:58,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 567 transitions. [2022-01-18 16:10:58,526 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 567 transitions. Word has length 23 [2022-01-18 16:10:58,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:58,527 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 567 transitions. [2022-01-18 16:10:58,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 16:10:58,527 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 567 transitions. [2022-01-18 16:10:58,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:10:58,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:58,527 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 16:10:58,545 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 16:10:58,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:58,735 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:10:58,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:58,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1216183969, now seen corresponding path program 8 times [2022-01-18 16:10:58,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:58,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468798349] [2022-01-18 16:10:58,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:58,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:58,795 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 16:10:58,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:58,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468798349] [2022-01-18 16:10:58,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468798349] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:58,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552874177] [2022-01-18 16:10:58,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:10:58,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:58,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:58,797 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 16:10:58,798 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 16:10:58,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:10:58,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:58,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 16:10:58,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:59,008 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 16:10:59,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:10:59,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552874177] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:59,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:59,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 24 [2022-01-18 16:10:59,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800671086] [2022-01-18 16:10:59,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:59,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:10:59,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:59,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:10:59,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:10:59,245 INFO L87 Difference]: Start difference. First operand 259 states and 567 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:59,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:10:59,872 INFO L93 Difference]: Finished difference Result 574 states and 1166 transitions. [2022-01-18 16:10:59,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 16:10:59,873 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 16:10:59,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:10:59,875 INFO L225 Difference]: With dead ends: 574 [2022-01-18 16:10:59,875 INFO L226 Difference]: Without dead ends: 553 [2022-01-18 16:10:59,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=769, Invalid=2201, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 16:10:59,876 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 199 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:10:59,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 132 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:10:59,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-01-18 16:10:59,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 235. [2022-01-18 16:10:59,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.1709401709401708) internal successors, (508), 234 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:59,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 508 transitions. [2022-01-18 16:10:59,883 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 508 transitions. Word has length 25 [2022-01-18 16:10:59,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:59,884 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 508 transitions. [2022-01-18 16:10:59,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:59,884 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 508 transitions. [2022-01-18 16:10:59,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 16:10:59,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:59,884 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 16:10:59,905 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 16:11:00,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-18 16:11:00,106 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:11:00,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:00,107 INFO L85 PathProgramCache]: Analyzing trace with hash -580006123, now seen corresponding path program 9 times [2022-01-18 16:11:00,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:00,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56897341] [2022-01-18 16:11:00,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:00,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:00,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:00,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:00,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56897341] [2022-01-18 16:11:00,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56897341] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:00,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316419321] [2022-01-18 16:11:00,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:11:00,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:00,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:00,168 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 16:11:00,169 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 16:11:00,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 16:11:00,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:00,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 16:11:00,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:00,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:00,575 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:00,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316419321] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:00,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:00,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 9] total 20 [2022-01-18 16:11:00,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600221060] [2022-01-18 16:11:00,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:00,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 16:11:00,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:00,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 16:11:00,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-01-18 16:11:00,577 INFO L87 Difference]: Start difference. First operand 235 states and 508 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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 16:11:00,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:00,961 INFO L93 Difference]: Finished difference Result 389 states and 796 transitions. [2022-01-18 16:11:00,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 16:11:00,961 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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 16:11:00,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:00,962 INFO L225 Difference]: With dead ends: 389 [2022-01-18 16:11:00,962 INFO L226 Difference]: Without dead ends: 385 [2022-01-18 16:11:00,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=549, Invalid=1343, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 16:11:00,963 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 212 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:00,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 43 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:11:00,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-01-18 16:11:00,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 235. [2022-01-18 16:11:00,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.1666666666666665) internal successors, (507), 234 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:00,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 507 transitions. [2022-01-18 16:11:00,969 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 507 transitions. Word has length 25 [2022-01-18 16:11:00,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:00,969 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 507 transitions. [2022-01-18 16:11:00,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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 16:11:00,969 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 507 transitions. [2022-01-18 16:11:00,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:11:00,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:00,969 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:00,991 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 16:11:01,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:01,187 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:11:01,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:01,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1444914083, now seen corresponding path program 10 times [2022-01-18 16:11:01,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:01,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654266675] [2022-01-18 16:11:01,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:01,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:01,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:01,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654266675] [2022-01-18 16:11:01,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654266675] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:01,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391350415] [2022-01-18 16:11:01,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:11:01,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:01,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:01,257 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 16:11:01,258 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 16:11:01,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:11:01,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:01,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 16:11:01,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:01,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:01,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:01,471 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:01,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391350415] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:01,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:01,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 9] total 12 [2022-01-18 16:11:01,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791284734] [2022-01-18 16:11:01,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:01,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 16:11:01,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:01,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 16:11:01,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-18 16:11:01,472 INFO L87 Difference]: Start difference. First operand 235 states and 507 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:01,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:01,522 INFO L93 Difference]: Finished difference Result 428 states and 902 transitions. [2022-01-18 16:11:01,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 16:11:01,522 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:11:01,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:01,524 INFO L225 Difference]: With dead ends: 428 [2022-01-18 16:11:01,524 INFO L226 Difference]: Without dead ends: 395 [2022-01-18 16:11:01,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-18 16:11:01,525 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 101 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:01,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 151 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:11:01,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-01-18 16:11:01,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 313. [2022-01-18 16:11:01,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.217948717948718) internal successors, (692), 312 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:01,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 692 transitions. [2022-01-18 16:11:01,531 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 692 transitions. Word has length 27 [2022-01-18 16:11:01,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:01,531 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 692 transitions. [2022-01-18 16:11:01,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:01,531 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 692 transitions. [2022-01-18 16:11:01,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:11:01,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:01,532 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:01,553 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 16:11:01,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-18 16:11:01,743 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:11:01,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:01,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1020645679, now seen corresponding path program 11 times [2022-01-18 16:11:01,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:01,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977111017] [2022-01-18 16:11:01,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:01,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:01,863 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:01,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:01,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977111017] [2022-01-18 16:11:01,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977111017] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:01,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719614886] [2022-01-18 16:11:01,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:11:01,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:01,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:01,864 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 16:11:01,865 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 16:11:01,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 16:11:01,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:01,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:11:01,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:02,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:02,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719614886] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:02,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:02,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2022-01-18 16:11:02,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656053052] [2022-01-18 16:11:02,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:02,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:11:02,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:02,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:11:02,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:11:02,619 INFO L87 Difference]: Start difference. First operand 313 states and 692 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:05,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:05,352 INFO L93 Difference]: Finished difference Result 1070 states and 2162 transitions. [2022-01-18 16:11:05,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 16:11:05,352 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:11:05,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:05,355 INFO L225 Difference]: With dead ends: 1070 [2022-01-18 16:11:05,355 INFO L226 Difference]: Without dead ends: 989 [2022-01-18 16:11:05,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2262 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1613, Invalid=5193, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 16:11:05,357 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 474 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:05,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 209 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:11:05,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-01-18 16:11:05,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 448. [2022-01-18 16:11:05,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 2.1834451901565997) internal successors, (976), 447 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:05,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 976 transitions. [2022-01-18 16:11:05,368 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 976 transitions. Word has length 27 [2022-01-18 16:11:05,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:05,368 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 976 transitions. [2022-01-18 16:11:05,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:05,368 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 976 transitions. [2022-01-18 16:11:05,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:11:05,369 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:05,369 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:05,386 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 16:11:05,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 16:11:05,585 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:11:05,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:05,585 INFO L85 PathProgramCache]: Analyzing trace with hash 275669725, now seen corresponding path program 12 times [2022-01-18 16:11:05,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:05,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11942711] [2022-01-18 16:11:05,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:05,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:05,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:05,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11942711] [2022-01-18 16:11:05,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11942711] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:05,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877859533] [2022-01-18 16:11:05,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:11:05,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:05,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:05,706 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 16:11:05,707 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 16:11:05,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 16:11:05,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:05,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 16:11:05,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:05,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:05,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:06,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877859533] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:06,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:06,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-01-18 16:11:06,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205918030] [2022-01-18 16:11:06,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:06,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 16:11:06,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:06,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 16:11:06,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2022-01-18 16:11:06,298 INFO L87 Difference]: Start difference. First operand 448 states and 976 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:07,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:07,251 INFO L93 Difference]: Finished difference Result 1546 states and 3357 transitions. [2022-01-18 16:11:07,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 16:11:07,251 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:11:07,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:07,256 INFO L225 Difference]: With dead ends: 1546 [2022-01-18 16:11:07,256 INFO L226 Difference]: Without dead ends: 1536 [2022-01-18 16:11:07,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1059, Invalid=2973, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 16:11:07,257 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 248 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:07,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 123 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:11:07,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2022-01-18 16:11:07,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 546. [2022-01-18 16:11:07,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.2605504587155965) internal successors, (1232), 545 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:07,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1232 transitions. [2022-01-18 16:11:07,274 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1232 transitions. Word has length 27 [2022-01-18 16:11:07,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:07,275 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 1232 transitions. [2022-01-18 16:11:07,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:07,275 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1232 transitions. [2022-01-18 16:11:07,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:11:07,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:07,276 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:07,291 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 16:11:07,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 16:11:07,491 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:11:07,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:07,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1973910373, now seen corresponding path program 13 times [2022-01-18 16:11:07,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:07,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171646415] [2022-01-18 16:11:07,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:07,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:07,589 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:07,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:07,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171646415] [2022-01-18 16:11:07,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171646415] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:07,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913236531] [2022-01-18 16:11:07,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:11:07,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:07,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:07,590 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 16:11:07,593 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 16:11:07,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:07,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 16:11:07,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:07,867 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:07,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:08,124 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:08,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913236531] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:08,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:08,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 30 [2022-01-18 16:11:08,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093854568] [2022-01-18 16:11:08,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:08,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:11:08,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:08,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:11:08,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=731, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:11:08,126 INFO L87 Difference]: Start difference. First operand 546 states and 1232 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:09,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:09,090 INFO L93 Difference]: Finished difference Result 1098 states and 2300 transitions. [2022-01-18 16:11:09,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:11:09,090 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 16:11:09,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:09,093 INFO L225 Difference]: With dead ends: 1098 [2022-01-18 16:11:09,093 INFO L226 Difference]: Without dead ends: 1035 [2022-01-18 16:11:09,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1432, Invalid=4268, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 16:11:09,096 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 273 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:09,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 174 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:11:09,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2022-01-18 16:11:09,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 503. [2022-01-18 16:11:09,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.256972111553785) internal successors, (1133), 502 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:09,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1133 transitions. [2022-01-18 16:11:09,111 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1133 transitions. Word has length 29 [2022-01-18 16:11:09,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:09,111 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1133 transitions. [2022-01-18 16:11:09,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:09,111 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1133 transitions. [2022-01-18 16:11:09,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:11:09,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:09,112 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:09,130 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 16:11:09,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 16:11:09,328 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:11:09,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:09,328 INFO L85 PathProgramCache]: Analyzing trace with hash 592333205, now seen corresponding path program 14 times [2022-01-18 16:11:09,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:09,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278987864] [2022-01-18 16:11:09,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:09,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:09,390 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:09,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:09,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278987864] [2022-01-18 16:11:09,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278987864] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:09,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019370088] [2022-01-18 16:11:09,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:11:09,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:09,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:09,391 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 16:11:09,391 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 16:11:09,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:11:09,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:09,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:11:09,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:09,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:09,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019370088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:09,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:09,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 11] total 25 [2022-01-18 16:11:09,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273587834] [2022-01-18 16:11:09,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:09,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:11:09,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:09,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:11:09,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:11:09,904 INFO L87 Difference]: Start difference. First operand 503 states and 1133 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:10,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:10,565 INFO L93 Difference]: Finished difference Result 753 states and 1609 transitions. [2022-01-18 16:11:10,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:11:10,566 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 16:11:10,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:10,568 INFO L225 Difference]: With dead ends: 753 [2022-01-18 16:11:10,568 INFO L226 Difference]: Without dead ends: 749 [2022-01-18 16:11:10,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=992, Invalid=2548, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 16:11:10,569 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 175 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:10,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 84 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:11:10,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-01-18 16:11:10,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 503. [2022-01-18 16:11:10,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.254980079681275) internal successors, (1132), 502 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:10,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1132 transitions. [2022-01-18 16:11:10,577 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1132 transitions. Word has length 29 [2022-01-18 16:11:10,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:10,577 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1132 transitions. [2022-01-18 16:11:10,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:10,577 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1132 transitions. [2022-01-18 16:11:10,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:11:10,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:10,578 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:10,595 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 16:11:10,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:10,779 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:11:10,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:10,779 INFO L85 PathProgramCache]: Analyzing trace with hash -224049671, now seen corresponding path program 15 times [2022-01-18 16:11:10,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:10,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173249306] [2022-01-18 16:11:10,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:10,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:10,872 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:10,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:10,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173249306] [2022-01-18 16:11:10,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173249306] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:10,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191360992] [2022-01-18 16:11:10,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:11:10,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:10,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:10,873 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 16:11:10,874 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 16:11:10,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:11:10,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:10,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 16:11:10,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:11,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:11,496 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:11,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191360992] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:11,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:11,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 15] total 36 [2022-01-18 16:11:11,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400683660] [2022-01-18 16:11:11,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:11,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:11:11,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:11,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:11:11,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1055, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:11:11,498 INFO L87 Difference]: Start difference. First operand 503 states and 1132 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:13,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:13,710 INFO L93 Difference]: Finished difference Result 2242 states and 4712 transitions. [2022-01-18 16:11:13,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-18 16:11:13,710 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 16:11:13,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:13,716 INFO L225 Difference]: With dead ends: 2242 [2022-01-18 16:11:13,716 INFO L226 Difference]: Without dead ends: 2141 [2022-01-18 16:11:13,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6873 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3989, Invalid=13041, Unknown=0, NotChecked=0, Total=17030 [2022-01-18 16:11:13,720 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 779 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:13,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 354 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:11:13,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2022-01-18 16:11:13,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 828. [2022-01-18 16:11:13,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 2.2781136638452235) internal successors, (1884), 827 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:13,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1884 transitions. [2022-01-18 16:11:13,743 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1884 transitions. Word has length 29 [2022-01-18 16:11:13,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:13,743 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 1884 transitions. [2022-01-18 16:11:13,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:13,743 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1884 transitions. [2022-01-18 16:11:13,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 16:11:13,745 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:13,745 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:13,760 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 16:11:13,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-18 16:11:13,959 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:11:13,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:13,960 INFO L85 PathProgramCache]: Analyzing trace with hash 524451993, now seen corresponding path program 16 times [2022-01-18 16:11:13,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:13,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936902575] [2022-01-18 16:11:13,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:13,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:13,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:14,027 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:14,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:14,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936902575] [2022-01-18 16:11:14,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936902575] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:14,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334124542] [2022-01-18 16:11:14,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:11:14,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:14,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:14,029 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 16:11:14,029 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 16:11:14,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:11:14,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:14,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:11:14,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:14,136 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:14,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:14,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334124542] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:14,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:14,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 11] total 15 [2022-01-18 16:11:14,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290541863] [2022-01-18 16:11:14,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:14,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 16:11:14,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:14,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 16:11:14,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-01-18 16:11:14,420 INFO L87 Difference]: Start difference. First operand 828 states and 1884 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 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 16:11:14,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:14,498 INFO L93 Difference]: Finished difference Result 1335 states and 3045 transitions. [2022-01-18 16:11:14,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 16:11:14,498 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 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 31 [2022-01-18 16:11:14,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:14,502 INFO L225 Difference]: With dead ends: 1335 [2022-01-18 16:11:14,502 INFO L226 Difference]: Without dead ends: 1296 [2022-01-18 16:11:14,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-01-18 16:11:14,502 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 160 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:14,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 228 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:11:14,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2022-01-18 16:11:14,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1137. [2022-01-18 16:11:14,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 2.3107394366197185) internal successors, (2625), 1136 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:14,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 2625 transitions. [2022-01-18 16:11:14,520 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 2625 transitions. Word has length 31 [2022-01-18 16:11:14,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:14,520 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 2625 transitions. [2022-01-18 16:11:14,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 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 16:11:14,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 2625 transitions. [2022-01-18 16:11:14,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 16:11:14,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:14,522 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:14,537 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 16:11:14,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 16:11:14,735 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:11:14,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:14,736 INFO L85 PathProgramCache]: Analyzing trace with hash -2075385877, now seen corresponding path program 17 times [2022-01-18 16:11:14,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:14,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831596405] [2022-01-18 16:11:14,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:14,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:14,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:14,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831596405] [2022-01-18 16:11:14,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831596405] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:14,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418023661] [2022-01-18 16:11:14,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:11:14,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:14,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:14,892 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 16:11:14,893 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 16:11:14,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 16:11:14,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:14,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 16:11:14,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:15,190 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:15,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:15,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418023661] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:15,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:15,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-01-18 16:11:15,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006457743] [2022-01-18 16:11:15,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:15,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 16:11:15,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:15,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 16:11:15,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:11:15,983 INFO L87 Difference]: Start difference. First operand 1137 states and 2625 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:20,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:20,275 INFO L93 Difference]: Finished difference Result 2543 states and 5521 transitions. [2022-01-18 16:11:20,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 16:11:20,276 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 16:11:20,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:20,282 INFO L225 Difference]: With dead ends: 2543 [2022-01-18 16:11:20,282 INFO L226 Difference]: Without dead ends: 2402 [2022-01-18 16:11:20,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3588 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2373, Invalid=8133, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 16:11:20,284 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 560 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:20,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 339 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:11:20,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2022-01-18 16:11:20,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 1423. [2022-01-18 16:11:20,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 2.2623066104078764) internal successors, (3217), 1422 states have internal predecessors, (3217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:20,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 3217 transitions. [2022-01-18 16:11:20,310 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 3217 transitions. Word has length 31 [2022-01-18 16:11:20,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:20,310 INFO L470 AbstractCegarLoop]: Abstraction has 1423 states and 3217 transitions. [2022-01-18 16:11:20,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:20,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 3217 transitions. [2022-01-18 16:11:20,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 16:11:20,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:20,312 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:20,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 16:11:20,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:20,528 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:11:20,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:20,528 INFO L85 PathProgramCache]: Analyzing trace with hash 410403225, now seen corresponding path program 18 times [2022-01-18 16:11:20,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:20,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750184628] [2022-01-18 16:11:20,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:20,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:20,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:20,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750184628] [2022-01-18 16:11:20,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750184628] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:20,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723629283] [2022-01-18 16:11:20,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:11:20,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:20,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:20,640 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 16:11:20,641 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 16:11:20,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 16:11:20,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:20,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 16:11:20,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:20,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:21,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723629283] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:21,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:21,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 31 [2022-01-18 16:11:21,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375335708] [2022-01-18 16:11:21,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:21,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:11:21,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:21,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:11:21,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=756, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:11:21,444 INFO L87 Difference]: Start difference. First operand 1423 states and 3217 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:22,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:22,959 INFO L93 Difference]: Finished difference Result 3227 states and 7200 transitions. [2022-01-18 16:11:22,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 16:11:22,960 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 16:11:22,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:22,969 INFO L225 Difference]: With dead ends: 3227 [2022-01-18 16:11:22,970 INFO L226 Difference]: Without dead ends: 3219 [2022-01-18 16:11:22,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2063 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1631, Invalid=4689, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 16:11:22,971 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 447 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:22,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 165 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:11:22,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2022-01-18 16:11:22,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 1442. [2022-01-18 16:11:23,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 2.2873004857737684) internal successors, (3296), 1441 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:23,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 3296 transitions. [2022-01-18 16:11:23,003 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 3296 transitions. Word has length 31 [2022-01-18 16:11:23,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:23,003 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 3296 transitions. [2022-01-18 16:11:23,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:23,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 3296 transitions. [2022-01-18 16:11:23,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 16:11:23,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:23,005 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:23,030 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 16:11:23,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:23,219 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:11:23,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:23,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1802444585, now seen corresponding path program 19 times [2022-01-18 16:11:23,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:23,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272221614] [2022-01-18 16:11:23,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:23,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:23,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:23,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:23,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272221614] [2022-01-18 16:11:23,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272221614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:23,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802759138] [2022-01-18 16:11:23,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:11:23,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:23,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:23,308 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 16:11:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:23,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 16:11:23,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:23,339 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 16:11:23,628 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:23,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:23,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802759138] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:23,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:23,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 32 [2022-01-18 16:11:23,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76641638] [2022-01-18 16:11:23,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:23,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 16:11:23,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:23,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 16:11:23,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=805, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 16:11:23,947 INFO L87 Difference]: Start difference. First operand 1442 states and 3296 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:24,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:24,930 INFO L93 Difference]: Finished difference Result 2321 states and 5141 transitions. [2022-01-18 16:11:24,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 16:11:24,931 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 16:11:24,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:24,937 INFO L225 Difference]: With dead ends: 2321 [2022-01-18 16:11:24,938 INFO L226 Difference]: Without dead ends: 2313 [2022-01-18 16:11:24,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1957 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1719, Invalid=4761, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 16:11:24,939 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 388 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:24,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 126 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:11:24,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2022-01-18 16:11:24,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1166. [2022-01-18 16:11:24,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1165 states have (on average 2.2643776824034334) internal successors, (2638), 1165 states have internal predecessors, (2638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:24,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 2638 transitions. [2022-01-18 16:11:24,958 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 2638 transitions. Word has length 31 [2022-01-18 16:11:24,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:24,958 INFO L470 AbstractCegarLoop]: Abstraction has 1166 states and 2638 transitions. [2022-01-18 16:11:24,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:24,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 2638 transitions. [2022-01-18 16:11:24,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:11:24,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:24,960 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:24,975 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 16:11:25,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:25,175 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:11:25,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:25,175 INFO L85 PathProgramCache]: Analyzing trace with hash 986733015, now seen corresponding path program 20 times [2022-01-18 16:11:25,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:25,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980312565] [2022-01-18 16:11:25,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:25,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:25,279 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:25,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:25,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980312565] [2022-01-18 16:11:25,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980312565] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:25,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458849481] [2022-01-18 16:11:25,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:11:25,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:25,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:25,280 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 16:11:25,281 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 16:11:25,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:11:25,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:25,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:11:25,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:25,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:25,880 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:25,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458849481] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:25,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:25,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 36 [2022-01-18 16:11:25,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572046002] [2022-01-18 16:11:25,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:25,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:11:25,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:25,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:11:25,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1057, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:11:25,882 INFO L87 Difference]: Start difference. First operand 1166 states and 2638 transitions. Second operand has 37 states, 37 states have (on average 2.324324324324324) internal successors, (86), 36 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:27,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:27,236 INFO L93 Difference]: Finished difference Result 2121 states and 4524 transitions. [2022-01-18 16:11:27,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 16:11:27,236 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.324324324324324) internal successors, (86), 36 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:11:27,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:27,241 INFO L225 Difference]: With dead ends: 2121 [2022-01-18 16:11:27,241 INFO L226 Difference]: Without dead ends: 1995 [2022-01-18 16:11:27,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2991 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2447, Invalid=7453, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 16:11:27,243 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 359 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:27,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 174 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:11:27,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2022-01-18 16:11:27,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1115. [2022-01-18 16:11:27,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 2.2594254937163374) internal successors, (2517), 1114 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:27,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 2517 transitions. [2022-01-18 16:11:27,262 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 2517 transitions. Word has length 33 [2022-01-18 16:11:27,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:27,262 INFO L470 AbstractCegarLoop]: Abstraction has 1115 states and 2517 transitions. [2022-01-18 16:11:27,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.324324324324324) internal successors, (86), 36 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:27,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 2517 transitions. [2022-01-18 16:11:27,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:11:27,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:27,263 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:27,279 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 16:11:27,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-18 16:11:27,479 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:11:27,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:27,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1374694123, now seen corresponding path program 21 times [2022-01-18 16:11:27,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:27,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919940992] [2022-01-18 16:11:27,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:27,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:27,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:27,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919940992] [2022-01-18 16:11:27,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919940992] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:27,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466363477] [2022-01-18 16:11:27,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:11:27,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:27,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:27,557 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 16:11:27,558 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 16:11:27,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-18 16:11:27,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:27,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 16:11:27,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:27,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:28,177 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:28,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466363477] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:28,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:28,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 14] total 32 [2022-01-18 16:11:28,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763653043] [2022-01-18 16:11:28,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:28,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 16:11:28,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:28,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 16:11:28,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=789, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 16:11:28,179 INFO L87 Difference]: Start difference. First operand 1115 states and 2517 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:29,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:29,583 INFO L93 Difference]: Finished difference Result 1545 states and 3349 transitions. [2022-01-18 16:11:29,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 16:11:29,583 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:11:29,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:29,586 INFO L225 Difference]: With dead ends: 1545 [2022-01-18 16:11:29,587 INFO L226 Difference]: Without dead ends: 1541 [2022-01-18 16:11:29,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3225 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2764, Invalid=7538, Unknown=0, NotChecked=0, Total=10302 [2022-01-18 16:11:29,588 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 264 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:29,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 89 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:11:29,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2022-01-18 16:11:29,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1115. [2022-01-18 16:11:29,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 2.258527827648115) internal successors, (2516), 1114 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:29,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 2516 transitions. [2022-01-18 16:11:29,604 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 2516 transitions. Word has length 33 [2022-01-18 16:11:29,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:29,604 INFO L470 AbstractCegarLoop]: Abstraction has 1115 states and 2516 transitions. [2022-01-18 16:11:29,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:29,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 2516 transitions. [2022-01-18 16:11:29,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:11:29,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:29,605 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:29,620 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 16:11:29,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-18 16:11:29,821 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:11:29,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:29,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1860569387, now seen corresponding path program 22 times [2022-01-18 16:11:29,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:29,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311185979] [2022-01-18 16:11:29,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:29,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:29,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:29,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311185979] [2022-01-18 16:11:29,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311185979] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:29,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906105180] [2022-01-18 16:11:29,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:11:29,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:29,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:29,902 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 16:11:29,903 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 16:11:29,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:11:29,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:29,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 16:11:29,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:30,024 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:30,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:30,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906105180] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:30,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:30,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 13] total 18 [2022-01-18 16:11:30,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191824274] [2022-01-18 16:11:30,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:30,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 16:11:30,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:30,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 16:11:30,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-01-18 16:11:30,207 INFO L87 Difference]: Start difference. First operand 1115 states and 2516 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:30,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:30,301 INFO L93 Difference]: Finished difference Result 1715 states and 3869 transitions. [2022-01-18 16:11:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 16:11:30,301 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:11:30,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:30,304 INFO L225 Difference]: With dead ends: 1715 [2022-01-18 16:11:30,304 INFO L226 Difference]: Without dead ends: 1670 [2022-01-18 16:11:30,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-01-18 16:11:30,305 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 129 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:30,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 349 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:11:30,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2022-01-18 16:11:30,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1471. [2022-01-18 16:11:30,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 2.314965986394558) internal successors, (3403), 1470 states have internal predecessors, (3403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:30,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 3403 transitions. [2022-01-18 16:11:30,325 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 3403 transitions. Word has length 35 [2022-01-18 16:11:30,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:30,325 INFO L470 AbstractCegarLoop]: Abstraction has 1471 states and 3403 transitions. [2022-01-18 16:11:30,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:30,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 3403 transitions. [2022-01-18 16:11:30,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:11:30,327 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:30,327 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:30,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 16:11:30,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:30,539 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:11:30,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:30,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1814617945, now seen corresponding path program 23 times [2022-01-18 16:11:30,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:30,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188318237] [2022-01-18 16:11:30,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:30,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:30,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:30,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:30,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188318237] [2022-01-18 16:11:30,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188318237] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:30,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602208655] [2022-01-18 16:11:30,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:11:30,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:30,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:30,713 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 16:11:30,713 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 16:11:30,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 16:11:30,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:30,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:11:30,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:31,067 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:31,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:32,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602208655] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:32,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:32,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 16:11:32,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279393693] [2022-01-18 16:11:32,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:32,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:11:32,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:32,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:11:32,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:11:32,185 INFO L87 Difference]: Start difference. First operand 1471 states and 3403 transitions. Second operand has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:39,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:39,034 INFO L93 Difference]: Finished difference Result 3304 states and 7063 transitions. [2022-01-18 16:11:39,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 16:11:39,034 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:11:39,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:39,039 INFO L225 Difference]: With dead ends: 3304 [2022-01-18 16:11:39,039 INFO L226 Difference]: Without dead ends: 3031 [2022-01-18 16:11:39,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=3270, Invalid=11736, Unknown=0, NotChecked=0, Total=15006 [2022-01-18 16:11:39,040 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 669 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 1671 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 1671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:39,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 435 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 1671 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:11:39,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3031 states. [2022-01-18 16:11:39,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3031 to 1747. [2022-01-18 16:11:39,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 2.2262313860252005) internal successors, (3887), 1746 states have internal predecessors, (3887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:39,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 3887 transitions. [2022-01-18 16:11:39,072 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 3887 transitions. Word has length 35 [2022-01-18 16:11:39,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:39,072 INFO L470 AbstractCegarLoop]: Abstraction has 1747 states and 3887 transitions. [2022-01-18 16:11:39,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:39,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 3887 transitions. [2022-01-18 16:11:39,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:11:39,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:39,075 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:39,091 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 16:11:39,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:39,283 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:11:39,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:39,283 INFO L85 PathProgramCache]: Analyzing trace with hash 175034965, now seen corresponding path program 24 times [2022-01-18 16:11:39,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:39,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667206451] [2022-01-18 16:11:39,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:39,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:39,417 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:39,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:39,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667206451] [2022-01-18 16:11:39,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667206451] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:39,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041251175] [2022-01-18 16:11:39,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:11:39,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:39,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:39,418 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 16:11:39,419 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 16:11:39,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-18 16:11:39,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:39,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 16:11:39,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:39,763 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:39,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:40,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041251175] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:40,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:40,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 38 [2022-01-18 16:11:40,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12944087] [2022-01-18 16:11:40,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:40,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 16:11:40,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:40,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 16:11:40,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1143, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 16:11:40,628 INFO L87 Difference]: Start difference. First operand 1747 states and 3887 transitions. Second operand has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:43,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:43,476 INFO L93 Difference]: Finished difference Result 4310 states and 9592 transitions. [2022-01-18 16:11:43,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 16:11:43,477 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:11:43,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:43,484 INFO L225 Difference]: With dead ends: 4310 [2022-01-18 16:11:43,484 INFO L226 Difference]: Without dead ends: 4302 [2022-01-18 16:11:43,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3782 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2695, Invalid=8225, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 16:11:43,486 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 593 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:43,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 173 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:11:43,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4302 states. [2022-01-18 16:11:43,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4302 to 2269. [2022-01-18 16:11:43,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2268 states have (on average 2.2755731922398588) internal successors, (5161), 2268 states have internal predecessors, (5161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:43,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 5161 transitions. [2022-01-18 16:11:43,527 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 5161 transitions. Word has length 35 [2022-01-18 16:11:43,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:43,527 INFO L470 AbstractCegarLoop]: Abstraction has 2269 states and 5161 transitions. [2022-01-18 16:11:43,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:43,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 5161 transitions. [2022-01-18 16:11:43,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:11:43,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:43,530 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:43,549 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 16:11:43,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-18 16:11:43,742 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:11:43,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:43,742 INFO L85 PathProgramCache]: Analyzing trace with hash 674574509, now seen corresponding path program 25 times [2022-01-18 16:11:43,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:43,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603662511] [2022-01-18 16:11:43,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:43,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:43,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:43,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603662511] [2022-01-18 16:11:43,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603662511] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:43,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804004169] [2022-01-18 16:11:43,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:11:43,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:43,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:43,830 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 16:11:43,830 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 16:11:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:43,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 16:11:43,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:44,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:44,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804004169] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:44,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:44,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 37 [2022-01-18 16:11:44,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469753246] [2022-01-18 16:11:44,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:44,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 16:11:44,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:44,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 16:11:44,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=1078, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 16:11:44,593 INFO L87 Difference]: Start difference. First operand 2269 states and 5161 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:46,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:46,125 INFO L93 Difference]: Finished difference Result 4342 states and 9549 transitions. [2022-01-18 16:11:46,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 16:11:46,126 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:11:46,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:46,132 INFO L225 Difference]: With dead ends: 4342 [2022-01-18 16:11:46,133 INFO L226 Difference]: Without dead ends: 4334 [2022-01-18 16:11:46,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3769 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3075, Invalid=8697, Unknown=0, NotChecked=0, Total=11772 [2022-01-18 16:11:46,134 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 471 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:46,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 209 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:11:46,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4334 states. [2022-01-18 16:11:46,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4334 to 2100. [2022-01-18 16:11:46,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2100 states, 2099 states have (on average 2.2725107193901857) internal successors, (4770), 2099 states have internal predecessors, (4770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:46,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 4770 transitions. [2022-01-18 16:11:46,169 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 4770 transitions. Word has length 35 [2022-01-18 16:11:46,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:46,169 INFO L470 AbstractCegarLoop]: Abstraction has 2100 states and 4770 transitions. [2022-01-18 16:11:46,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:46,170 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 4770 transitions. [2022-01-18 16:11:46,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 16:11:46,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:46,172 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:46,187 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 16:11:46,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 16:11:46,387 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:11:46,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:46,387 INFO L85 PathProgramCache]: Analyzing trace with hash 326959379, now seen corresponding path program 26 times [2022-01-18 16:11:46,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:46,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903363751] [2022-01-18 16:11:46,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:46,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:46,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:46,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903363751] [2022-01-18 16:11:46,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903363751] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:46,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040234801] [2022-01-18 16:11:46,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:11:46,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:46,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:46,513 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 16:11:46,513 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 16:11:46,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:11:46,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:46,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 16:11:46,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:46,904 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:46,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:47,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040234801] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:47,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:47,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 42 [2022-01-18 16:11:47,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791919226] [2022-01-18 16:11:47,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:47,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 16:11:47,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:47,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 16:11:47,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1443, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 16:11:47,352 INFO L87 Difference]: Start difference. First operand 2100 states and 4770 transitions. Second operand has 43 states, 43 states have (on average 2.2790697674418605) internal successors, (98), 42 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:49,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:49,269 INFO L93 Difference]: Finished difference Result 3300 states and 7116 transitions. [2022-01-18 16:11:49,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 16:11:49,269 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2790697674418605) internal successors, (98), 42 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 16:11:49,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:49,274 INFO L225 Difference]: With dead ends: 3300 [2022-01-18 16:11:49,274 INFO L226 Difference]: Without dead ends: 3111 [2022-01-18 16:11:49,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5089 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3920, Invalid=12082, Unknown=0, NotChecked=0, Total=16002 [2022-01-18 16:11:49,276 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 478 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:49,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 225 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1246 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:11:49,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2022-01-18 16:11:49,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 2017. [2022-01-18 16:11:49,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.275297619047619) internal successors, (4587), 2016 states have internal predecessors, (4587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:49,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 4587 transitions. [2022-01-18 16:11:49,304 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 4587 transitions. Word has length 37 [2022-01-18 16:11:49,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:49,304 INFO L470 AbstractCegarLoop]: Abstraction has 2017 states and 4587 transitions. [2022-01-18 16:11:49,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2790697674418605) internal successors, (98), 42 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:49,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 4587 transitions. [2022-01-18 16:11:49,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 16:11:49,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:49,306 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:49,322 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 16:11:49,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 16:11:49,522 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:11:49,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:49,522 INFO L85 PathProgramCache]: Analyzing trace with hash -177098347, now seen corresponding path program 27 times [2022-01-18 16:11:49,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:49,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85678675] [2022-01-18 16:11:49,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:49,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:49,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:49,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85678675] [2022-01-18 16:11:49,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85678675] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:49,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812731452] [2022-01-18 16:11:49,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:11:49,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:49,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:49,610 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 16:11:49,611 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 16:11:49,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-18 16:11:49,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:49,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 16:11:49,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:49,975 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:49,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:50,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812731452] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:50,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:50,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 16] total 37 [2022-01-18 16:11:50,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114299464] [2022-01-18 16:11:50,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:50,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 16:11:50,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:50,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 16:11:50,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1057, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 16:11:50,338 INFO L87 Difference]: Start difference. First operand 2017 states and 4587 transitions. Second operand has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 37 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:52,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:52,455 INFO L93 Difference]: Finished difference Result 2617 states and 5755 transitions. [2022-01-18 16:11:52,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-18 16:11:52,455 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 37 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 16:11:52,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:52,459 INFO L225 Difference]: With dead ends: 2617 [2022-01-18 16:11:52,459 INFO L226 Difference]: Without dead ends: 2613 [2022-01-18 16:11:52,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5796 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4528, Invalid=12764, Unknown=0, NotChecked=0, Total=17292 [2022-01-18 16:11:52,462 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 394 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:52,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 128 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:11:52,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2022-01-18 16:11:52,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2017. [2022-01-18 16:11:52,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.2748015873015874) internal successors, (4586), 2016 states have internal predecessors, (4586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:52,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 4586 transitions. [2022-01-18 16:11:52,488 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 4586 transitions. Word has length 37 [2022-01-18 16:11:52,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:52,488 INFO L470 AbstractCegarLoop]: Abstraction has 2017 states and 4586 transitions. [2022-01-18 16:11:52,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 37 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:52,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 4586 transitions. [2022-01-18 16:11:52,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 16:11:52,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:52,490 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:52,517 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 16:11:52,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 16:11:52,703 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:11:52,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:52,704 INFO L85 PathProgramCache]: Analyzing trace with hash -35070279, now seen corresponding path program 28 times [2022-01-18 16:11:52,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:52,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758481830] [2022-01-18 16:11:52,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:52,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:52,798 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:11:52,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:52,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758481830] [2022-01-18 16:11:52,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758481830] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:52,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928097136] [2022-01-18 16:11:52,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:11:52,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:52,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:52,799 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 16:11:52,800 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 16:11:52,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:11:52,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:52,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:11:52,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:11:53,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:53,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928097136] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:53,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:53,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 17] total 41 [2022-01-18 16:11:53,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59750716] [2022-01-18 16:11:53,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:53,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:11:53,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:53,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:11:53,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=1290, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:11:53,698 INFO L87 Difference]: Start difference. First operand 2017 states and 4586 transitions. Second operand has 42 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 41 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:56,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:11:56,307 INFO L93 Difference]: Finished difference Result 6297 states and 13794 transitions. [2022-01-18 16:11:56,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-18 16:11:56,308 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 41 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 16:11:56,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:11:56,314 INFO L225 Difference]: With dead ends: 6297 [2022-01-18 16:11:56,314 INFO L226 Difference]: Without dead ends: 6192 [2022-01-18 16:11:56,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8663 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5776, Invalid=13964, Unknown=0, NotChecked=0, Total=19740 [2022-01-18 16:11:56,316 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 755 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:11:56,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 321 Invalid, 1526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:11:56,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6192 states. [2022-01-18 16:11:56,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6192 to 3061. [2022-01-18 16:11:56,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3061 states, 3060 states have (on average 2.2669934640522875) internal successors, (6937), 3060 states have internal predecessors, (6937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:56,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3061 states to 3061 states and 6937 transitions. [2022-01-18 16:11:56,365 INFO L78 Accepts]: Start accepts. Automaton has 3061 states and 6937 transitions. Word has length 37 [2022-01-18 16:11:56,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:11:56,365 INFO L470 AbstractCegarLoop]: Abstraction has 3061 states and 6937 transitions. [2022-01-18 16:11:56,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 41 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:11:56,366 INFO L276 IsEmpty]: Start isEmpty. Operand 3061 states and 6937 transitions. [2022-01-18 16:11:56,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 16:11:56,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:11:56,369 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:11:56,386 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 16:11:56,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:56,579 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:11:56,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:11:56,580 INFO L85 PathProgramCache]: Analyzing trace with hash -148555911, now seen corresponding path program 29 times [2022-01-18 16:11:56,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:11:56,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981129077] [2022-01-18 16:11:56,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:11:56,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:11:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:11:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:56,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:11:56,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981129077] [2022-01-18 16:11:56,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981129077] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:11:56,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009217337] [2022-01-18 16:11:56,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:11:56,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:11:56,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:11:56,722 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 16:11:56,723 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 16:11:56,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 16:11:56,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:11:56,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 16:11:56,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:11:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:57,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:11:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:11:57,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009217337] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:11:57,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:11:57,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2022-01-18 16:11:57,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311721792] [2022-01-18 16:11:57,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:11:57,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-18 16:11:57,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:11:57,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-18 16:11:57,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1814, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 16:11:57,509 INFO L87 Difference]: Start difference. First operand 3061 states and 6937 transitions. Second operand has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:00,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:12:00,332 INFO L93 Difference]: Finished difference Result 7660 states and 16591 transitions. [2022-01-18 16:12:00,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-18 16:12:00,333 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 16:12:00,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:12:00,343 INFO L225 Difference]: With dead ends: 7660 [2022-01-18 16:12:00,343 INFO L226 Difference]: Without dead ends: 7474 [2022-01-18 16:12:00,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10600 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6820, Invalid=18940, Unknown=0, NotChecked=0, Total=25760 [2022-01-18 16:12:00,346 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 798 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:12:00,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 300 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:12:00,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7474 states. [2022-01-18 16:12:00,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7474 to 3144. [2022-01-18 16:12:00,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3144 states, 3143 states have (on average 2.2742602608972318) internal successors, (7148), 3143 states have internal predecessors, (7148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:00,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3144 states to 3144 states and 7148 transitions. [2022-01-18 16:12:00,414 INFO L78 Accepts]: Start accepts. Automaton has 3144 states and 7148 transitions. Word has length 37 [2022-01-18 16:12:00,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:12:00,414 INFO L470 AbstractCegarLoop]: Abstraction has 3144 states and 7148 transitions. [2022-01-18 16:12:00,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:00,415 INFO L276 IsEmpty]: Start isEmpty. Operand 3144 states and 7148 transitions. [2022-01-18 16:12:00,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:12:00,418 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:12:00,418 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:12:00,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 16:12:00,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:00,626 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:12:00,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:12:00,626 INFO L85 PathProgramCache]: Analyzing trace with hash -247873775, now seen corresponding path program 30 times [2022-01-18 16:12:00,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:12:00,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034947748] [2022-01-18 16:12:00,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:12:00,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:12:00,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:00,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:12:00,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034947748] [2022-01-18 16:12:00,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034947748] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:12:00,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263931006] [2022-01-18 16:12:00,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:12:00,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:00,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:12:00,723 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 16:12:00,724 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 16:12:00,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 16:12:00,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:12:00,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 16:12:00,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:12:00,892 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:00,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:12:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:01,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263931006] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:12:01,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:12:01,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 21 [2022-01-18 16:12:01,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194988266] [2022-01-18 16:12:01,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:12:01,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 16:12:01,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:12:01,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 16:12:01,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-01-18 16:12:01,075 INFO L87 Difference]: Start difference. First operand 3144 states and 7148 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:01,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:12:01,386 INFO L93 Difference]: Finished difference Result 5118 states and 11762 transitions. [2022-01-18 16:12:01,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 16:12:01,386 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:12:01,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:12:01,392 INFO L225 Difference]: With dead ends: 5118 [2022-01-18 16:12:01,393 INFO L226 Difference]: Without dead ends: 5048 [2022-01-18 16:12:01,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:12:01,393 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 198 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:12:01,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 644 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:12:01,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5048 states. [2022-01-18 16:12:01,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5048 to 3958. [2022-01-18 16:12:01,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3958 states, 3957 states have (on average 2.3040181956027292) internal successors, (9117), 3957 states have internal predecessors, (9117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:01,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3958 states to 3958 states and 9117 transitions. [2022-01-18 16:12:01,445 INFO L78 Accepts]: Start accepts. Automaton has 3958 states and 9117 transitions. Word has length 39 [2022-01-18 16:12:01,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:12:01,445 INFO L470 AbstractCegarLoop]: Abstraction has 3958 states and 9117 transitions. [2022-01-18 16:12:01,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:01,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3958 states and 9117 transitions. [2022-01-18 16:12:01,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:12:01,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:12:01,448 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:12:01,463 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 16:12:01,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-01-18 16:12:01,649 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:12:01,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:12:01,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1725109521, now seen corresponding path program 31 times [2022-01-18 16:12:01,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:12:01,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46568124] [2022-01-18 16:12:01,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:12:01,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:12:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:01,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:12:01,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46568124] [2022-01-18 16:12:01,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46568124] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:12:01,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338078163] [2022-01-18 16:12:01,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:12:01,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:01,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:12:01,792 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 16:12:01,793 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 16:12:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:01,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:12:01,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:12:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:02,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:12:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:03,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338078163] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:12:03,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:12:03,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 18] total 43 [2022-01-18 16:12:03,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728240727] [2022-01-18 16:12:03,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:12:03,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 16:12:03,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:12:03,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 16:12:03,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=1459, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 16:12:03,364 INFO L87 Difference]: Start difference. First operand 3958 states and 9117 transitions. Second operand has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:07,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:12:07,381 INFO L93 Difference]: Finished difference Result 7185 states and 16496 transitions. [2022-01-18 16:12:07,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-18 16:12:07,381 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:12:07,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:12:07,392 INFO L225 Difference]: With dead ends: 7185 [2022-01-18 16:12:07,392 INFO L226 Difference]: Without dead ends: 7179 [2022-01-18 16:12:07,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5139 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3544, Invalid=10976, Unknown=0, NotChecked=0, Total=14520 [2022-01-18 16:12:07,393 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 773 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 1975 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 1975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:12:07,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 230 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 1975 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:12:07,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7179 states. [2022-01-18 16:12:07,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7179 to 4213. [2022-01-18 16:12:07,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 4212 states have (on average 2.3409306742640075) internal successors, (9860), 4212 states have internal predecessors, (9860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:07,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 9860 transitions. [2022-01-18 16:12:07,466 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 9860 transitions. Word has length 39 [2022-01-18 16:12:07,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:12:07,466 INFO L470 AbstractCegarLoop]: Abstraction has 4213 states and 9860 transitions. [2022-01-18 16:12:07,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:07,466 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 9860 transitions. [2022-01-18 16:12:07,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:12:07,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:12:07,470 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:12:07,485 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 16:12:07,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:07,671 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:12:07,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:12:07,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1853554639, now seen corresponding path program 32 times [2022-01-18 16:12:07,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:12:07,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143603595] [2022-01-18 16:12:07,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:12:07,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:12:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:07,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:12:07,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143603595] [2022-01-18 16:12:07,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143603595] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:12:07,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91548049] [2022-01-18 16:12:07,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:12:07,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:07,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:12:07,764 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 16:12:07,765 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 16:12:07,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:12:07,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:12:07,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 16:12:07,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:12:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:08,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:12:08,641 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 32 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:08,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91548049] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:12:08,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:12:08,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18] total 42 [2022-01-18 16:12:08,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867539872] [2022-01-18 16:12:08,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:12:08,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 16:12:08,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:12:08,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 16:12:08,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1391, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 16:12:08,642 INFO L87 Difference]: Start difference. First operand 4213 states and 9860 transitions. Second operand has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:10,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:12:10,863 INFO L93 Difference]: Finished difference Result 5916 states and 13505 transitions. [2022-01-18 16:12:10,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-18 16:12:10,863 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:12:10,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:12:10,869 INFO L225 Difference]: With dead ends: 5916 [2022-01-18 16:12:10,869 INFO L226 Difference]: Without dead ends: 5912 [2022-01-18 16:12:10,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6354 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4949, Invalid=13957, Unknown=0, NotChecked=0, Total=18906 [2022-01-18 16:12:10,870 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 416 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:12:10,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 123 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:12:10,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5912 states. [2022-01-18 16:12:10,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5912 to 3527. [2022-01-18 16:12:10,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3527 states, 3526 states have (on average 2.356211003970505) internal successors, (8308), 3526 states have internal predecessors, (8308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:10,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3527 states to 3527 states and 8308 transitions. [2022-01-18 16:12:10,918 INFO L78 Accepts]: Start accepts. Automaton has 3527 states and 8308 transitions. Word has length 39 [2022-01-18 16:12:10,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:12:10,918 INFO L470 AbstractCegarLoop]: Abstraction has 3527 states and 8308 transitions. [2022-01-18 16:12:10,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:10,918 INFO L276 IsEmpty]: Start isEmpty. Operand 3527 states and 8308 transitions. [2022-01-18 16:12:10,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 16:12:10,921 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:12:10,921 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:12:10,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 16:12:11,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:11,135 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:12:11,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:12:11,136 INFO L85 PathProgramCache]: Analyzing trace with hash 725410591, now seen corresponding path program 33 times [2022-01-18 16:12:11,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:12:11,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502419490] [2022-01-18 16:12:11,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:12:11,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:12:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:12:11,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:12:11,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502419490] [2022-01-18 16:12:11,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502419490] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:12:11,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575046190] [2022-01-18 16:12:11,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:12:11,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:11,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:12:11,265 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 16:12:11,267 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 16:12:11,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-18 16:12:11,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:12:11,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 16:12:11,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:12:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:11,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:12:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:12,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575046190] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:12:12,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:12:12,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 20] total 49 [2022-01-18 16:12:12,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726116819] [2022-01-18 16:12:12,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:12:12,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-18 16:12:12,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:12:12,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-18 16:12:12,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=2064, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 16:12:12,293 INFO L87 Difference]: Start difference. First operand 3527 states and 8308 transitions. Second operand has 50 states, 50 states have (on average 2.28) internal successors, (114), 49 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:19,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:12:19,091 INFO L93 Difference]: Finished difference Result 8303 states and 17604 transitions. [2022-01-18 16:12:19,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2022-01-18 16:12:19,091 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 49 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 16:12:19,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:12:19,102 INFO L225 Difference]: With dead ends: 8303 [2022-01-18 16:12:19,102 INFO L226 Difference]: Without dead ends: 7946 [2022-01-18 16:12:19,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30616 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=18238, Invalid=56564, Unknown=0, NotChecked=0, Total=74802 [2022-01-18 16:12:19,105 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1008 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 2087 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 2363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 2087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:12:19,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1008 Valid, 424 Invalid, 2363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 2087 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:12:19,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7946 states. [2022-01-18 16:12:19,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7946 to 3824. [2022-01-18 16:12:19,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3824 states, 3823 states have (on average 2.3481558985090243) internal successors, (8977), 3823 states have internal predecessors, (8977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:19,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3824 states to 3824 states and 8977 transitions. [2022-01-18 16:12:19,175 INFO L78 Accepts]: Start accepts. Automaton has 3824 states and 8977 transitions. Word has length 41 [2022-01-18 16:12:19,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:12:19,175 INFO L470 AbstractCegarLoop]: Abstraction has 3824 states and 8977 transitions. [2022-01-18 16:12:19,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 49 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:19,175 INFO L276 IsEmpty]: Start isEmpty. Operand 3824 states and 8977 transitions. [2022-01-18 16:12:19,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 16:12:19,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:12:19,179 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:12:19,197 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 16:12:19,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-01-18 16:12:19,391 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:12:19,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:12:19,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1834803435, now seen corresponding path program 34 times [2022-01-18 16:12:19,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:12:19,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924178842] [2022-01-18 16:12:19,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:12:19,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:12:19,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:19,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:12:19,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924178842] [2022-01-18 16:12:19,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924178842] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:12:19,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5339485] [2022-01-18 16:12:19,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:12:19,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:19,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:12:19,487 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 16:12:19,487 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 16:12:19,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:12:19,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:12:19,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 16:12:19,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:12:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:19,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:12:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:20,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5339485] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:12:20,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:12:20,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18, 17] total 40 [2022-01-18 16:12:20,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294232840] [2022-01-18 16:12:20,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:12:20,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:12:20,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:12:20,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:12:20,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=1230, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:12:20,338 INFO L87 Difference]: Start difference. First operand 3824 states and 8977 transitions. Second operand has 41 states, 41 states have (on average 2.4878048780487805) internal successors, (102), 40 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:22,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:12:22,088 INFO L93 Difference]: Finished difference Result 5731 states and 13056 transitions. [2022-01-18 16:12:22,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 16:12:22,088 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4878048780487805) internal successors, (102), 40 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-18 16:12:22,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:12:22,095 INFO L225 Difference]: With dead ends: 5731 [2022-01-18 16:12:22,095 INFO L226 Difference]: Without dead ends: 5727 [2022-01-18 16:12:22,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4451 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3813, Invalid=10467, Unknown=0, NotChecked=0, Total=14280 [2022-01-18 16:12:22,097 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 377 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:12:22,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 166 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:12:22,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5727 states. [2022-01-18 16:12:22,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5727 to 4625. [2022-01-18 16:12:22,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4625 states, 4624 states have (on average 2.343425605536332) internal successors, (10836), 4624 states have internal predecessors, (10836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:22,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4625 states to 4625 states and 10836 transitions. [2022-01-18 16:12:22,158 INFO L78 Accepts]: Start accepts. Automaton has 4625 states and 10836 transitions. Word has length 41 [2022-01-18 16:12:22,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:12:22,158 INFO L470 AbstractCegarLoop]: Abstraction has 4625 states and 10836 transitions. [2022-01-18 16:12:22,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4878048780487805) internal successors, (102), 40 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:22,158 INFO L276 IsEmpty]: Start isEmpty. Operand 4625 states and 10836 transitions. [2022-01-18 16:12:22,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:12:22,163 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:12:22,163 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:12:22,178 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 16:12:22,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 16:12:22,378 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:12:22,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:12:22,378 INFO L85 PathProgramCache]: Analyzing trace with hash 217373005, now seen corresponding path program 35 times [2022-01-18 16:12:22,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:12:22,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574240851] [2022-01-18 16:12:22,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:12:22,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:12:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:22,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:12:22,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574240851] [2022-01-18 16:12:22,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574240851] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:12:22,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096642511] [2022-01-18 16:12:22,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:12:22,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:22,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:12:22,470 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 16:12:22,471 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 16:12:22,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-18 16:12:22,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:12:22,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:12:22,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:12:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:22,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:12:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:23,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096642511] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:12:23,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:12:23,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 17] total 24 [2022-01-18 16:12:23,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577036286] [2022-01-18 16:12:23,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:12:23,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 16:12:23,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:12:23,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 16:12:23,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2022-01-18 16:12:23,135 INFO L87 Difference]: Start difference. First operand 4625 states and 10836 transitions. Second operand has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:23,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:12:23,349 INFO L93 Difference]: Finished difference Result 6487 states and 15374 transitions. [2022-01-18 16:12:23,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 16:12:23,349 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:12:23,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:12:23,358 INFO L225 Difference]: With dead ends: 6487 [2022-01-18 16:12:23,358 INFO L226 Difference]: Without dead ends: 6430 [2022-01-18 16:12:23,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2022-01-18 16:12:23,359 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 182 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:12:23,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 616 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:12:23,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6430 states. [2022-01-18 16:12:23,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6430 to 6189. [2022-01-18 16:12:23,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6189 states, 6188 states have (on average 2.397382029734971) internal successors, (14835), 6188 states have internal predecessors, (14835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:23,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6189 states to 6189 states and 14835 transitions. [2022-01-18 16:12:23,443 INFO L78 Accepts]: Start accepts. Automaton has 6189 states and 14835 transitions. Word has length 43 [2022-01-18 16:12:23,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:12:23,443 INFO L470 AbstractCegarLoop]: Abstraction has 6189 states and 14835 transitions. [2022-01-18 16:12:23,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:23,443 INFO L276 IsEmpty]: Start isEmpty. Operand 6189 states and 14835 transitions. [2022-01-18 16:12:23,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:12:23,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:12:23,449 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:12:23,465 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 16:12:23,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 16:12:23,649 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:12:23,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:12:23,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1423537757, now seen corresponding path program 36 times [2022-01-18 16:12:23,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:12:23,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75956997] [2022-01-18 16:12:23,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:12:23,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:12:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:23,825 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:23,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:12:23,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75956997] [2022-01-18 16:12:23,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75956997] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:12:23,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387798356] [2022-01-18 16:12:23,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:12:23,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:23,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:12:23,827 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 16:12:23,827 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 16:12:23,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-01-18 16:12:23,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:12:23,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-18 16:12:23,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:12:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:24,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:12:26,021 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:26,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387798356] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:12:26,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:12:26,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 20] total 48 [2022-01-18 16:12:26,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189134676] [2022-01-18 16:12:26,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:12:26,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 16:12:26,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:12:26,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 16:12:26,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=1883, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 16:12:26,022 INFO L87 Difference]: Start difference. First operand 6189 states and 14835 transitions. Second operand has 49 states, 49 states have (on average 2.36734693877551) internal successors, (116), 48 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:35,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:12:35,335 INFO L93 Difference]: Finished difference Result 14113 states and 32350 transitions. [2022-01-18 16:12:35,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-18 16:12:35,335 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.36734693877551) internal successors, (116), 48 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:12:35,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:12:35,355 INFO L225 Difference]: With dead ends: 14113 [2022-01-18 16:12:35,355 INFO L226 Difference]: Without dead ends: 14074 [2022-01-18 16:12:35,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12397 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=6675, Invalid=25905, Unknown=0, NotChecked=0, Total=32580 [2022-01-18 16:12:35,357 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1375 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 3756 mSolverCounterSat, 618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 4374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 618 IncrementalHoareTripleChecker+Valid, 3756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:12:35,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1375 Valid, 505 Invalid, 4374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [618 Valid, 3756 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 16:12:35,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14074 states. [2022-01-18 16:12:35,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14074 to 7107. [2022-01-18 16:12:35,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7107 states, 7106 states have (on average 2.41345341964537) internal successors, (17150), 7106 states have internal predecessors, (17150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:35,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7107 states to 7107 states and 17150 transitions. [2022-01-18 16:12:35,515 INFO L78 Accepts]: Start accepts. Automaton has 7107 states and 17150 transitions. Word has length 43 [2022-01-18 16:12:35,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:12:35,515 INFO L470 AbstractCegarLoop]: Abstraction has 7107 states and 17150 transitions. [2022-01-18 16:12:35,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.36734693877551) internal successors, (116), 48 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:35,515 INFO L276 IsEmpty]: Start isEmpty. Operand 7107 states and 17150 transitions. [2022-01-18 16:12:35,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:12:35,521 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:12:35,521 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:12:35,539 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 16:12:35,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:35,739 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:12:35,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:12:35,740 INFO L85 PathProgramCache]: Analyzing trace with hash 2141063629, now seen corresponding path program 37 times [2022-01-18 16:12:35,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:12:35,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489774689] [2022-01-18 16:12:35,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:12:35,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:12:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:35,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:12:35,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489774689] [2022-01-18 16:12:35,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489774689] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:12:35,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933335729] [2022-01-18 16:12:35,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:12:35,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:35,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:12:35,939 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 16:12:35,940 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 16:12:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:35,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-18 16:12:35,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:12:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:36,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:12:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 19 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:38,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933335729] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:12:38,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:12:38,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 20] total 48 [2022-01-18 16:12:38,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815390942] [2022-01-18 16:12:38,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:12:38,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 16:12:38,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:12:38,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 16:12:38,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=1812, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 16:12:38,051 INFO L87 Difference]: Start difference. First operand 7107 states and 17150 transitions. Second operand has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 48 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:44,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:12:44,349 INFO L93 Difference]: Finished difference Result 11263 states and 26738 transitions. [2022-01-18 16:12:44,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-18 16:12:44,350 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 48 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:12:44,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:12:44,365 INFO L225 Difference]: With dead ends: 11263 [2022-01-18 16:12:44,365 INFO L226 Difference]: Without dead ends: 11257 [2022-01-18 16:12:44,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5198, Invalid=16264, Unknown=0, NotChecked=0, Total=21462 [2022-01-18 16:12:44,366 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 695 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 3735 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 4158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 3735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:12:44,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [695 Valid, 418 Invalid, 4158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 3735 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 16:12:44,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11257 states. [2022-01-18 16:12:44,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11257 to 7121. [2022-01-18 16:12:44,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7121 states, 7120 states have (on average 2.3985955056179775) internal successors, (17078), 7120 states have internal predecessors, (17078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:44,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7121 states to 7121 states and 17078 transitions. [2022-01-18 16:12:44,501 INFO L78 Accepts]: Start accepts. Automaton has 7121 states and 17078 transitions. Word has length 43 [2022-01-18 16:12:44,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:12:44,501 INFO L470 AbstractCegarLoop]: Abstraction has 7121 states and 17078 transitions. [2022-01-18 16:12:44,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 48 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:44,501 INFO L276 IsEmpty]: Start isEmpty. Operand 7121 states and 17078 transitions. [2022-01-18 16:12:44,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:12:44,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:12:44,508 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:12:44,523 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 16:12:44,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 16:12:44,721 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:12:44,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:12:44,722 INFO L85 PathProgramCache]: Analyzing trace with hash -2112358153, now seen corresponding path program 38 times [2022-01-18 16:12:44,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:12:44,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105413464] [2022-01-18 16:12:44,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:12:44,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:12:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 19 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:12:44,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:12:44,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105413464] [2022-01-18 16:12:44,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105413464] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:12:44,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001304156] [2022-01-18 16:12:44,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:12:44,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:44,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:12:44,893 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 16:12:44,894 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 16:12:44,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:12:44,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:12:44,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:12:44,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:12:45,391 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:45,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:12:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 17 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:45,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001304156] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:12:45,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:12:45,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 20] total 51 [2022-01-18 16:12:45,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220509035] [2022-01-18 16:12:45,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:12:45,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-18 16:12:45,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:12:45,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-18 16:12:45,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=2232, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 16:12:45,949 INFO L87 Difference]: Start difference. First operand 7121 states and 17078 transitions. Second operand has 52 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:51,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:12:51,167 INFO L93 Difference]: Finished difference Result 23199 states and 51780 transitions. [2022-01-18 16:12:51,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-01-18 16:12:51,168 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:12:51,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:12:51,200 INFO L225 Difference]: With dead ends: 23199 [2022-01-18 16:12:51,200 INFO L226 Difference]: Without dead ends: 22782 [2022-01-18 16:12:51,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17718 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=10278, Invalid=36594, Unknown=0, NotChecked=0, Total=46872 [2022-01-18 16:12:51,203 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 870 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 2092 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 2373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 2092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:12:51,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [870 Valid, 337 Invalid, 2373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 2092 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:12:51,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22782 states. [2022-01-18 16:12:51,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22782 to 8676. [2022-01-18 16:12:51,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8676 states, 8675 states have (on average 2.400806916426513) internal successors, (20827), 8675 states have internal predecessors, (20827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:51,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8676 states to 8676 states and 20827 transitions. [2022-01-18 16:12:51,394 INFO L78 Accepts]: Start accepts. Automaton has 8676 states and 20827 transitions. Word has length 43 [2022-01-18 16:12:51,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:12:51,394 INFO L470 AbstractCegarLoop]: Abstraction has 8676 states and 20827 transitions. [2022-01-18 16:12:51,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:51,394 INFO L276 IsEmpty]: Start isEmpty. Operand 8676 states and 20827 transitions. [2022-01-18 16:12:51,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:12:51,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:12:51,401 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:12:51,415 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 16:12:51,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 16:12:51,601 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:12:51,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:12:51,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1531415989, now seen corresponding path program 39 times [2022-01-18 16:12:51,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:12:51,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387117853] [2022-01-18 16:12:51,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:12:51,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:12:51,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:51,726 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:51,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:12:51,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387117853] [2022-01-18 16:12:51,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387117853] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:12:51,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603742754] [2022-01-18 16:12:51,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:12:51,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:51,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:12:51,732 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 16:12:51,732 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 16:12:51,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-18 16:12:51,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:12:51,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:12:51,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:12:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:52,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:12:52,734 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 44 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:52,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603742754] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:12:52,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:12:52,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 20] total 47 [2022-01-18 16:12:52,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599743858] [2022-01-18 16:12:52,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:12:52,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-18 16:12:52,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:12:52,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-18 16:12:52,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=1743, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 16:12:52,736 INFO L87 Difference]: Start difference. First operand 8676 states and 20827 transitions. Second operand has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:55,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:12:55,835 INFO L93 Difference]: Finished difference Result 12074 states and 28318 transitions. [2022-01-18 16:12:55,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-18 16:12:55,835 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:12:55,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:12:55,873 INFO L225 Difference]: With dead ends: 12074 [2022-01-18 16:12:55,874 INFO L226 Difference]: Without dead ends: 12070 [2022-01-18 16:12:55,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10473 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7559, Invalid=21853, Unknown=0, NotChecked=0, Total=29412 [2022-01-18 16:12:55,875 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 692 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:12:55,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 190 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:12:55,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12070 states. [2022-01-18 16:12:55,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12070 to 7183. [2022-01-18 16:12:55,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7183 states, 7182 states have (on average 2.404204956836536) internal successors, (17267), 7182 states have internal predecessors, (17267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:55,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7183 states to 7183 states and 17267 transitions. [2022-01-18 16:12:55,981 INFO L78 Accepts]: Start accepts. Automaton has 7183 states and 17267 transitions. Word has length 43 [2022-01-18 16:12:55,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:12:55,981 INFO L470 AbstractCegarLoop]: Abstraction has 7183 states and 17267 transitions. [2022-01-18 16:12:55,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:12:55,981 INFO L276 IsEmpty]: Start isEmpty. Operand 7183 states and 17267 transitions. [2022-01-18 16:12:55,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-18 16:12:55,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:12:55,988 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:12:56,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 16:12:56,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:56,191 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:12:56,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:12:56,192 INFO L85 PathProgramCache]: Analyzing trace with hash 289457547, now seen corresponding path program 40 times [2022-01-18 16:12:56,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:12:56,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064701715] [2022-01-18 16:12:56,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:12:56,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:12:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:12:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:56,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:12:56,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064701715] [2022-01-18 16:12:56,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064701715] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:12:56,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5004469] [2022-01-18 16:12:56,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:12:56,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:12:56,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:12:56,367 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 16:12:56,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:12:56,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:12:56,394 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 16:12:56,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:12:56,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:12:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:56,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:12:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 56 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:12:57,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5004469] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:12:57,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:12:57,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 20] total 54 [2022-01-18 16:12:57,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551792734] [2022-01-18 16:12:57,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:12:57,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-18 16:12:57,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:12:57,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-18 16:12:57,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=2395, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 16:12:57,415 INFO L87 Difference]: Start difference. First operand 7183 states and 17267 transitions. Second operand has 55 states, 55 states have (on average 2.2181818181818183) internal successors, (122), 54 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:13:01,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:13:01,030 INFO L93 Difference]: Finished difference Result 11408 states and 26181 transitions. [2022-01-18 16:13:01,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-18 16:13:01,030 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2181818181818183) internal successors, (122), 54 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-01-18 16:13:01,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:13:01,043 INFO L225 Difference]: With dead ends: 11408 [2022-01-18 16:13:01,043 INFO L226 Difference]: Without dead ends: 10835 [2022-01-18 16:13:01,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12470 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8734, Invalid=27176, Unknown=0, NotChecked=0, Total=35910 [2022-01-18 16:13:01,044 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 729 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 1683 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:13:01,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [729 Valid, 270 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1683 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:13:01,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10835 states. [2022-01-18 16:13:01,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10835 to 7730. [2022-01-18 16:13:01,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7730 states, 7729 states have (on average 2.387631000129383) internal successors, (18454), 7729 states have internal predecessors, (18454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:13:01,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7730 states to 7730 states and 18454 transitions. [2022-01-18 16:13:01,152 INFO L78 Accepts]: Start accepts. Automaton has 7730 states and 18454 transitions. Word has length 45 [2022-01-18 16:13:01,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:13:01,152 INFO L470 AbstractCegarLoop]: Abstraction has 7730 states and 18454 transitions. [2022-01-18 16:13:01,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.2181818181818183) internal successors, (122), 54 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:13:01,152 INFO L276 IsEmpty]: Start isEmpty. Operand 7730 states and 18454 transitions. [2022-01-18 16:13:01,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-18 16:13:01,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:13:01,158 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:13:01,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 16:13:01,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-18 16:13:01,359 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:13:01,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:13:01,359 INFO L85 PathProgramCache]: Analyzing trace with hash -2075959915, now seen corresponding path program 41 times [2022-01-18 16:13:01,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:13:01,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784801820] [2022-01-18 16:13:01,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:13:01,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:13:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:13:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:01,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:13:01,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784801820] [2022-01-18 16:13:01,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784801820] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:13:01,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677045674] [2022-01-18 16:13:01,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:13:01,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:13:01,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:13:01,477 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 16:13:01,478 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 16:13:01,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-01-18 16:13:01,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:13:01,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 16:13:01,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:13:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:02,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:13:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:02,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677045674] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:13:02,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:13:02,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 20] total 47 [2022-01-18 16:13:02,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010601118] [2022-01-18 16:13:02,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:13:02,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-18 16:13:02,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:13:02,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-18 16:13:02,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 16:13:02,588 INFO L87 Difference]: Start difference. First operand 7730 states and 18454 transitions. Second operand has 48 states, 48 states have (on average 2.375) internal successors, (114), 47 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:13:06,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:13:06,592 INFO L93 Difference]: Finished difference Result 8996 states and 21001 transitions. [2022-01-18 16:13:06,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-01-18 16:13:06,592 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.375) internal successors, (114), 47 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-01-18 16:13:06,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:13:06,601 INFO L225 Difference]: With dead ends: 8996 [2022-01-18 16:13:06,602 INFO L226 Difference]: Without dead ends: 8992 [2022-01-18 16:13:06,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15551 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=10580, Invalid=31240, Unknown=0, NotChecked=0, Total=41820 [2022-01-18 16:13:06,603 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 390 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:13:06,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 182 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:13:06,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8992 states. [2022-01-18 16:13:06,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8992 to 7730. [2022-01-18 16:13:06,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7730 states, 7729 states have (on average 2.387242851597878) internal successors, (18451), 7729 states have internal predecessors, (18451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:13:06,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7730 states to 7730 states and 18451 transitions. [2022-01-18 16:13:06,696 INFO L78 Accepts]: Start accepts. Automaton has 7730 states and 18451 transitions. Word has length 45 [2022-01-18 16:13:06,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:13:06,696 INFO L470 AbstractCegarLoop]: Abstraction has 7730 states and 18451 transitions. [2022-01-18 16:13:06,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.375) internal successors, (114), 47 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:13:06,696 INFO L276 IsEmpty]: Start isEmpty. Operand 7730 states and 18451 transitions. [2022-01-18 16:13:06,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-18 16:13:06,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:13:06,702 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:13:06,717 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 16:13:06,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:13:06,903 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:13:06,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:13:06,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1464272399, now seen corresponding path program 42 times [2022-01-18 16:13:06,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:13:06,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434299375] [2022-01-18 16:13:06,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:13:06,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:13:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:13:07,037 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 38 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:13:07,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:13:07,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434299375] [2022-01-18 16:13:07,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434299375] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:13:07,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381140151] [2022-01-18 16:13:07,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:13:07,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:13:07,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:13:07,038 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 16:13:07,040 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 16:13:07,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-01-18 16:13:07,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:13:07,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:13:07,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:13:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 20 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:07,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:13:08,309 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 25 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:08,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381140151] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:13:08,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:13:08,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 22] total 52 [2022-01-18 16:13:08,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309687434] [2022-01-18 16:13:08,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:13:08,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-18 16:13:08,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:13:08,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-18 16:13:08,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=516, Invalid=2240, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 16:13:08,310 INFO L87 Difference]: Start difference. First operand 7730 states and 18451 transitions. Second operand has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 52 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:13:13,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:13:13,113 INFO L93 Difference]: Finished difference Result 27688 states and 62379 transitions. [2022-01-18 16:13:13,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-01-18 16:13:13,113 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 52 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-01-18 16:13:13,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:13:13,161 INFO L225 Difference]: With dead ends: 27688 [2022-01-18 16:13:13,161 INFO L226 Difference]: Without dead ends: 27340 [2022-01-18 16:13:13,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15186 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=9660, Invalid=28170, Unknown=0, NotChecked=0, Total=37830 [2022-01-18 16:13:13,162 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 995 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 1993 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 2325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:13:13,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [995 Valid, 254 Invalid, 2325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1993 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:13:13,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27340 states. [2022-01-18 16:13:13,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27340 to 10468. [2022-01-18 16:13:13,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10468 states, 10467 states have (on average 2.3889366580682143) internal successors, (25005), 10467 states have internal predecessors, (25005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:13:13,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10468 states to 10468 states and 25005 transitions. [2022-01-18 16:13:13,425 INFO L78 Accepts]: Start accepts. Automaton has 10468 states and 25005 transitions. Word has length 45 [2022-01-18 16:13:13,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:13:13,425 INFO L470 AbstractCegarLoop]: Abstraction has 10468 states and 25005 transitions. [2022-01-18 16:13:13,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 52 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:13:13,426 INFO L276 IsEmpty]: Start isEmpty. Operand 10468 states and 25005 transitions. [2022-01-18 16:13:13,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 16:13:13,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:13:13,434 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:13:13,451 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 16:13:13,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:13:13,635 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:13:13,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:13:13,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1927395959, now seen corresponding path program 43 times [2022-01-18 16:13:13,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:13:13,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411723648] [2022-01-18 16:13:13,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:13:13,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:13:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:13:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 1 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:13,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:13:13,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411723648] [2022-01-18 16:13:13,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411723648] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:13:13,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785717376] [2022-01-18 16:13:13,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:13:13,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:13:13,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:13:13,751 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 16:13:13,752 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 16:13:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:13:13,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:13:13,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:13:13,919 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:13,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:13:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:14,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785717376] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:13:14,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:13:14,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 19] total 27 [2022-01-18 16:13:14,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779578841] [2022-01-18 16:13:14,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:13:14,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 16:13:14,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:13:14,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 16:13:14,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2022-01-18 16:13:14,593 INFO L87 Difference]: Start difference. First operand 10468 states and 25005 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:13:14,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:13:14,845 INFO L93 Difference]: Finished difference Result 13463 states and 32382 transitions. [2022-01-18 16:13:14,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 16:13:14,846 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 16:13:14,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:13:14,868 INFO L225 Difference]: With dead ends: 13463 [2022-01-18 16:13:14,868 INFO L226 Difference]: Without dead ends: 13400 [2022-01-18 16:13:14,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2022-01-18 16:13:14,873 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 290 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:13:14,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 700 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:13:14,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13400 states. [2022-01-18 16:13:15,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13400 to 12840. [2022-01-18 16:13:15,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12840 states, 12839 states have (on average 2.4131941740010903) internal successors, (30983), 12839 states have internal predecessors, (30983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:13:15,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12840 states to 12840 states and 30983 transitions. [2022-01-18 16:13:15,075 INFO L78 Accepts]: Start accepts. Automaton has 12840 states and 30983 transitions. Word has length 47 [2022-01-18 16:13:15,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:13:15,075 INFO L470 AbstractCegarLoop]: Abstraction has 12840 states and 30983 transitions. [2022-01-18 16:13:15,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:13:15,076 INFO L276 IsEmpty]: Start isEmpty. Operand 12840 states and 30983 transitions. [2022-01-18 16:13:15,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 16:13:15,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:13:15,086 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:13:15,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 16:13:15,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-01-18 16:13:15,287 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:13:15,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:13:15,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1790816549, now seen corresponding path program 44 times [2022-01-18 16:13:15,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:13:15,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221579652] [2022-01-18 16:13:15,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:13:15,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:13:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:13:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:15,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:13:15,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221579652] [2022-01-18 16:13:15,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221579652] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:13:15,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897588091] [2022-01-18 16:13:15,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:13:15,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:13:15,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:13:15,647 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 16:13:15,648 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 16:13:15,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:13:15,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:13:15,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:13:15,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:13:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:16,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:13:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:19,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897588091] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:13:19,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:13:19,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 58 [2022-01-18 16:13:19,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834919258] [2022-01-18 16:13:19,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:13:19,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-18 16:13:19,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:13:19,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-18 16:13:19,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=2904, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 16:13:19,084 INFO L87 Difference]: Start difference. First operand 12840 states and 30983 transitions. Second operand has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 58 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:13:38,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:13:38,610 INFO L93 Difference]: Finished difference Result 20720 states and 47882 transitions. [2022-01-18 16:13:38,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-18 16:13:38,610 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 58 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 16:13:38,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:13:38,637 INFO L225 Difference]: With dead ends: 20720 [2022-01-18 16:13:38,637 INFO L226 Difference]: Without dead ends: 19952 [2022-01-18 16:13:38,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11526 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=6771, Invalid=26535, Unknown=0, NotChecked=0, Total=33306 [2022-01-18 16:13:38,639 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 972 mSDsluCounter, 1532 mSDsCounter, 0 mSdLazyCounter, 3529 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 3950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 3529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:13:38,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [972 Valid, 776 Invalid, 3950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 3529 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 16:13:38,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19952 states. [2022-01-18 16:13:38,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19952 to 14485. [2022-01-18 16:13:38,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14485 states, 14484 states have (on average 2.24081745374206) internal successors, (32456), 14484 states have internal predecessors, (32456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:13:38,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14485 states to 14485 states and 32456 transitions. [2022-01-18 16:13:38,879 INFO L78 Accepts]: Start accepts. Automaton has 14485 states and 32456 transitions. Word has length 47 [2022-01-18 16:13:38,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:13:38,879 INFO L470 AbstractCegarLoop]: Abstraction has 14485 states and 32456 transitions. [2022-01-18 16:13:38,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 58 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:13:38,879 INFO L276 IsEmpty]: Start isEmpty. Operand 14485 states and 32456 transitions. [2022-01-18 16:13:38,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 16:13:38,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:13:38,888 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:13:38,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-18 16:13:39,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 16:13:39,089 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:13:39,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:13:39,089 INFO L85 PathProgramCache]: Analyzing trace with hash -129322871, now seen corresponding path program 45 times [2022-01-18 16:13:39,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:13:39,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030146928] [2022-01-18 16:13:39,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:13:39,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:13:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:13:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:39,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:13:39,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030146928] [2022-01-18 16:13:39,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030146928] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:13:39,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285737910] [2022-01-18 16:13:39,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:13:39,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:13:39,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:13:39,282 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 16:13:39,284 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 16:13:39,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-18 16:13:39,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:13:39,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2022-01-18 16:13:39,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:13:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:39,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:13:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 22 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:42,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285737910] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:13:42,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:13:42,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 22] total 53 [2022-01-18 16:13:42,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103309273] [2022-01-18 16:13:42,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:13:42,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-18 16:13:42,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:13:42,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-18 16:13:42,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=2202, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 16:13:42,040 INFO L87 Difference]: Start difference. First operand 14485 states and 32456 transitions. Second operand has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:13:50,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:13:50,046 INFO L93 Difference]: Finished difference Result 24787 states and 56061 transitions. [2022-01-18 16:13:50,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-18 16:13:50,046 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 16:13:50,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:13:50,088 INFO L225 Difference]: With dead ends: 24787 [2022-01-18 16:13:50,088 INFO L226 Difference]: Without dead ends: 24781 [2022-01-18 16:13:50,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8411 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=5603, Invalid=17653, Unknown=0, NotChecked=0, Total=23256 [2022-01-18 16:13:50,089 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 986 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 3687 mSolverCounterSat, 608 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 986 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 4295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 608 IncrementalHoareTripleChecker+Valid, 3687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:13:50,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [986 Valid, 283 Invalid, 4295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [608 Valid, 3687 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 16:13:50,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24781 states. [2022-01-18 16:13:50,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24781 to 18743. [2022-01-18 16:13:50,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18743 states, 18742 states have (on average 2.2557891366983247) internal successors, (42278), 18742 states have internal predecessors, (42278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:13:50,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18743 states to 18743 states and 42278 transitions. [2022-01-18 16:13:50,406 INFO L78 Accepts]: Start accepts. Automaton has 18743 states and 42278 transitions. Word has length 47 [2022-01-18 16:13:50,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:13:50,406 INFO L470 AbstractCegarLoop]: Abstraction has 18743 states and 42278 transitions. [2022-01-18 16:13:50,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:13:50,406 INFO L276 IsEmpty]: Start isEmpty. Operand 18743 states and 42278 transitions. [2022-01-18 16:13:50,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-18 16:13:50,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:13:50,417 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:13:50,432 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 16:13:50,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 16:13:50,628 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:13:50,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:13:50,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1055250745, now seen corresponding path program 46 times [2022-01-18 16:13:50,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:13:50,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818912485] [2022-01-18 16:13:50,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:13:50,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:13:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:13:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:50,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:13:50,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818912485] [2022-01-18 16:13:50,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818912485] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:13:50,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484055130] [2022-01-18 16:13:50,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:13:50,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:13:50,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:13:50,761 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 16:13:50,766 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 16:13:50,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:13:50,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:13:50,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 16:13:50,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:13:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:51,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:13:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 58 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:52,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484055130] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:13:52,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:13:52,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22, 22] total 52 [2022-01-18 16:13:52,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801648434] [2022-01-18 16:13:52,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:13:52,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-18 16:13:52,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:13:52,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-18 16:13:52,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=619, Invalid=2137, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 16:13:52,011 INFO L87 Difference]: Start difference. First operand 18743 states and 42278 transitions. Second operand has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:13:56,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:13:56,414 INFO L93 Difference]: Finished difference Result 26020 states and 58276 transitions. [2022-01-18 16:13:56,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-01-18 16:13:56,414 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-18 16:13:56,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:13:56,460 INFO L225 Difference]: With dead ends: 26020 [2022-01-18 16:13:56,460 INFO L226 Difference]: Without dead ends: 26016 [2022-01-18 16:13:56,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16812 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=11497, Invalid=34085, Unknown=0, NotChecked=0, Total=45582 [2022-01-18 16:13:56,462 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 728 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:13:56,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 345 Invalid, 1760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1552 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:13:56,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26016 states. [2022-01-18 16:13:56,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26016 to 18578. [2022-01-18 16:13:56,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18578 states, 18577 states have (on average 2.264143833772945) internal successors, (42061), 18577 states have internal predecessors, (42061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:13:56,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18578 states to 18578 states and 42061 transitions. [2022-01-18 16:13:56,779 INFO L78 Accepts]: Start accepts. Automaton has 18578 states and 42061 transitions. Word has length 47 [2022-01-18 16:13:56,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:13:56,779 INFO L470 AbstractCegarLoop]: Abstraction has 18578 states and 42061 transitions. [2022-01-18 16:13:56,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:13:56,779 INFO L276 IsEmpty]: Start isEmpty. Operand 18578 states and 42061 transitions. [2022-01-18 16:13:56,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-18 16:13:56,791 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:13:56,791 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:13:56,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 16:13:57,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:13:57,007 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:13:57,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:13:57,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1962795719, now seen corresponding path program 47 times [2022-01-18 16:13:57,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:13:57,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289822722] [2022-01-18 16:13:57,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:13:57,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:13:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:13:57,185 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:57,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:13:57,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289822722] [2022-01-18 16:13:57,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289822722] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:13:57,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023399490] [2022-01-18 16:13:57,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:13:57,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:13:57,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:13:57,187 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 16:13:57,187 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 16:13:57,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-01-18 16:13:57,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:13:57,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-18 16:13:57,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:13:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:57,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:13:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 72 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:13:58,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023399490] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:13:58,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:13:58,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 22] total 60 [2022-01-18 16:13:58,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050298373] [2022-01-18 16:13:58,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:13:58,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-18 16:13:58,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:13:58,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-18 16:13:58,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=699, Invalid=2961, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 16:13:58,541 INFO L87 Difference]: Start difference. First operand 18578 states and 42061 transitions. Second operand has 61 states, 61 states have (on average 2.19672131147541) internal successors, (134), 60 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:03,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:14:03,232 INFO L93 Difference]: Finished difference Result 21738 states and 48486 transitions. [2022-01-18 16:14:03,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-01-18 16:14:03,232 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.19672131147541) internal successors, (134), 60 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-01-18 16:14:03,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:14:03,262 INFO L225 Difference]: With dead ends: 21738 [2022-01-18 16:14:03,262 INFO L226 Difference]: Without dead ends: 21222 [2022-01-18 16:14:03,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18341 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=12357, Invalid=38493, Unknown=0, NotChecked=0, Total=50850 [2022-01-18 16:14:03,266 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 906 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1845 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 2002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:14:03,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [906 Valid, 294 Invalid, 2002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1845 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:14:03,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21222 states. [2022-01-18 16:14:03,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21222 to 18290. [2022-01-18 16:14:03,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18290 states, 18289 states have (on average 2.263601071682432) internal successors, (41399), 18289 states have internal predecessors, (41399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:03,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18290 states to 18290 states and 41399 transitions. [2022-01-18 16:14:03,529 INFO L78 Accepts]: Start accepts. Automaton has 18290 states and 41399 transitions. Word has length 49 [2022-01-18 16:14:03,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:14:03,529 INFO L470 AbstractCegarLoop]: Abstraction has 18290 states and 41399 transitions. [2022-01-18 16:14:03,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.19672131147541) internal successors, (134), 60 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:03,530 INFO L276 IsEmpty]: Start isEmpty. Operand 18290 states and 41399 transitions. [2022-01-18 16:14:03,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-18 16:14:03,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:14:03,541 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:14:03,556 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 16:14:03,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-01-18 16:14:03,741 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:14:03,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:14:03,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1919003925, now seen corresponding path program 48 times [2022-01-18 16:14:03,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:14:03,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615065307] [2022-01-18 16:14:03,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:14:03,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:14:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:14:03,873 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:03,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:14:03,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615065307] [2022-01-18 16:14:03,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615065307] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:14:03,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612714511] [2022-01-18 16:14:03,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:14:03,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:14:03,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:14:03,874 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 16:14:03,875 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 16:14:03,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-01-18 16:14:03,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:14:03,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 16:14:03,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:14:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:04,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:14:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:05,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612714511] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:14:05,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:14:05,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 23, 22] total 52 [2022-01-18 16:14:05,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484350662] [2022-01-18 16:14:05,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:14:05,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-18 16:14:05,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:14:05,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-18 16:14:05,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=661, Invalid=2095, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 16:14:05,149 INFO L87 Difference]: Start difference. First operand 18290 states and 41399 transitions. Second operand has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:10,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:14:10,476 INFO L93 Difference]: Finished difference Result 19699 states and 44208 transitions. [2022-01-18 16:14:10,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2022-01-18 16:14:10,476 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-01-18 16:14:10,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:14:10,503 INFO L225 Difference]: With dead ends: 19699 [2022-01-18 16:14:10,503 INFO L226 Difference]: Without dead ends: 19695 [2022-01-18 16:14:10,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23346 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=14862, Invalid=44918, Unknown=0, NotChecked=0, Total=59780 [2022-01-18 16:14:10,506 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 482 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:14:10,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 167 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:14:10,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19695 states. [2022-01-18 16:14:10,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19695 to 18290. [2022-01-18 16:14:10,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18290 states, 18289 states have (on average 2.2634917163322217) internal successors, (41397), 18289 states have internal predecessors, (41397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:10,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18290 states to 18290 states and 41397 transitions. [2022-01-18 16:14:10,756 INFO L78 Accepts]: Start accepts. Automaton has 18290 states and 41397 transitions. Word has length 49 [2022-01-18 16:14:10,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:14:10,756 INFO L470 AbstractCegarLoop]: Abstraction has 18290 states and 41397 transitions. [2022-01-18 16:14:10,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:10,756 INFO L276 IsEmpty]: Start isEmpty. Operand 18290 states and 41397 transitions. [2022-01-18 16:14:10,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-18 16:14:10,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:14:10,767 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:14:10,782 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 16:14:10,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 16:14:10,968 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:14:10,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:14:10,968 INFO L85 PathProgramCache]: Analyzing trace with hash 736975417, now seen corresponding path program 49 times [2022-01-18 16:14:10,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:14:10,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967287542] [2022-01-18 16:14:10,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:14:10,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:14:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:14:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 56 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:11,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:14:11,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967287542] [2022-01-18 16:14:11,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967287542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:14:11,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461857467] [2022-01-18 16:14:11,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:14:11,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:14:11,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:14:11,186 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 16:14:11,186 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 16:14:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:14:11,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:14:11,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:14:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 56 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:11,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:14:12,605 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:12,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461857467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:14:12,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:14:12,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 24] total 65 [2022-01-18 16:14:12,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575850394] [2022-01-18 16:14:12,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:14:12,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-18 16:14:12,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:14:12,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-18 16:14:12,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=772, Invalid=3518, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 16:14:12,607 INFO L87 Difference]: Start difference. First operand 18290 states and 41397 transitions. Second operand has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:21,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:14:21,286 INFO L93 Difference]: Finished difference Result 43892 states and 98386 transitions. [2022-01-18 16:14:21,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 254 states. [2022-01-18 16:14:21,286 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-01-18 16:14:21,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:14:21,357 INFO L225 Difference]: With dead ends: 43892 [2022-01-18 16:14:21,357 INFO L226 Difference]: Without dead ends: 43177 [2022-01-18 16:14:21,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42237 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=24395, Invalid=74515, Unknown=0, NotChecked=0, Total=98910 [2022-01-18 16:14:21,361 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1531 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 2707 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1531 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 3044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 2707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:14:21,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1531 Valid, 665 Invalid, 3044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 2707 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 16:14:21,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43177 states. [2022-01-18 16:14:21,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43177 to 21332. [2022-01-18 16:14:21,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21332 states, 21331 states have (on average 2.2915475130092355) internal successors, (48881), 21331 states have internal predecessors, (48881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:21,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21332 states to 21332 states and 48881 transitions. [2022-01-18 16:14:21,874 INFO L78 Accepts]: Start accepts. Automaton has 21332 states and 48881 transitions. Word has length 49 [2022-01-18 16:14:21,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:14:21,875 INFO L470 AbstractCegarLoop]: Abstraction has 21332 states and 48881 transitions. [2022-01-18 16:14:21,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:21,875 INFO L276 IsEmpty]: Start isEmpty. Operand 21332 states and 48881 transitions. [2022-01-18 16:14:21,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-18 16:14:21,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:14:21,890 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:14:21,906 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 16:14:22,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:14:22,091 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:14:22,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:14:22,091 INFO L85 PathProgramCache]: Analyzing trace with hash -167181371, now seen corresponding path program 50 times [2022-01-18 16:14:22,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:14:22,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293791528] [2022-01-18 16:14:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:14:22,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:14:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:14:22,218 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 1 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:22,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:14:22,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293791528] [2022-01-18 16:14:22,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293791528] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:14:22,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705288523] [2022-01-18 16:14:22,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:14:22,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:14:22,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:14:22,220 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 16:14:22,221 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 16:14:22,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:14:22,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:14:22,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:14:22,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:14:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:22,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:14:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:22,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705288523] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:14:22,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:14:22,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 21] total 30 [2022-01-18 16:14:22,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525347961] [2022-01-18 16:14:22,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:14:22,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:14:22,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:14:22,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:14:22,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:14:22,798 INFO L87 Difference]: Start difference. First operand 21332 states and 48881 transitions. Second operand has 30 states, 30 states have (on average 3.2) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:23,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:14:23,116 INFO L93 Difference]: Finished difference Result 26854 states and 62395 transitions. [2022-01-18 16:14:23,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 16:14:23,117 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-18 16:14:23,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:14:23,163 INFO L225 Difference]: With dead ends: 26854 [2022-01-18 16:14:23,164 INFO L226 Difference]: Without dead ends: 26785 [2022-01-18 16:14:23,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:14:23,164 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 309 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:14:23,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 896 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:14:23,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26785 states. [2022-01-18 16:14:23,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26785 to 25947. [2022-01-18 16:14:23,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25947 states, 25946 states have (on average 2.3242503661450704) internal successors, (60305), 25946 states have internal predecessors, (60305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:23,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25947 states to 25947 states and 60305 transitions. [2022-01-18 16:14:23,707 INFO L78 Accepts]: Start accepts. Automaton has 25947 states and 60305 transitions. Word has length 51 [2022-01-18 16:14:23,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:14:23,707 INFO L470 AbstractCegarLoop]: Abstraction has 25947 states and 60305 transitions. [2022-01-18 16:14:23,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:23,707 INFO L276 IsEmpty]: Start isEmpty. Operand 25947 states and 60305 transitions. [2022-01-18 16:14:23,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-18 16:14:23,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:14:23,727 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:14:23,743 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 16:14:23,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-01-18 16:14:23,934 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:14:23,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:14:23,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1055790999, now seen corresponding path program 51 times [2022-01-18 16:14:23,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:14:23,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326889005] [2022-01-18 16:14:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:14:23,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:14:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:14:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:24,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:14:24,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326889005] [2022-01-18 16:14:24,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326889005] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:14:24,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355703883] [2022-01-18 16:14:24,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:14:24,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:14:24,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:14:24,286 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 16:14:24,287 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 16:14:24,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-18 16:14:24,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:14:24,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 16:14:24,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:14:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 20 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:24,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:14:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:24,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355703883] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:14:24,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:14:24,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 13] total 45 [2022-01-18 16:14:24,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429692088] [2022-01-18 16:14:24,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:14:24,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 16:14:24,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:14:24,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 16:14:24,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1643, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 16:14:24,911 INFO L87 Difference]: Start difference. First operand 25947 states and 60305 transitions. Second operand has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 45 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:26,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:14:26,586 INFO L93 Difference]: Finished difference Result 36532 states and 85714 transitions. [2022-01-18 16:14:26,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:14:26,587 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 45 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-18 16:14:26,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:14:26,649 INFO L225 Difference]: With dead ends: 36532 [2022-01-18 16:14:26,649 INFO L226 Difference]: Without dead ends: 36520 [2022-01-18 16:14:26,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1438 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=946, Invalid=5534, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 16:14:26,650 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 641 mSDsluCounter, 1530 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 2508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:14:26,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 838 Invalid, 2508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:14:26,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36520 states. [2022-01-18 16:14:27,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36520 to 25202. [2022-01-18 16:14:27,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25202 states, 25201 states have (on average 2.336097773897861) internal successors, (58872), 25201 states have internal predecessors, (58872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:27,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25202 states to 25202 states and 58872 transitions. [2022-01-18 16:14:27,092 INFO L78 Accepts]: Start accepts. Automaton has 25202 states and 58872 transitions. Word has length 51 [2022-01-18 16:14:27,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:14:27,093 INFO L470 AbstractCegarLoop]: Abstraction has 25202 states and 58872 transitions. [2022-01-18 16:14:27,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 45 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:27,093 INFO L276 IsEmpty]: Start isEmpty. Operand 25202 states and 58872 transitions. [2022-01-18 16:14:27,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-18 16:14:27,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:14:27,108 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:14:27,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-18 16:14:27,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:14:27,309 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:14:27,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:14:27,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1171523909, now seen corresponding path program 52 times [2022-01-18 16:14:27,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:14:27,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394602974] [2022-01-18 16:14:27,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:14:27,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:14:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:14:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:27,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:14:27,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394602974] [2022-01-18 16:14:27,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394602974] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:14:27,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713628465] [2022-01-18 16:14:27,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:14:27,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:14:27,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:14:27,570 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 16:14:27,571 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 16:14:27,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:14:27,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:14:27,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-18 16:14:27,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:14:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:28,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:14:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 25 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:31,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713628465] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:14:31,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:14:31,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24, 24] total 58 [2022-01-18 16:14:31,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831439401] [2022-01-18 16:14:31,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:14:31,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-18 16:14:31,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:14:31,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-18 16:14:31,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=793, Invalid=2629, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 16:14:31,322 INFO L87 Difference]: Start difference. First operand 25202 states and 58872 transitions. Second operand has 59 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 58 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:42,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:14:42,707 INFO L93 Difference]: Finished difference Result 34543 states and 81614 transitions. [2022-01-18 16:14:42,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-18 16:14:42,708 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 58 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-18 16:14:42,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:14:42,775 INFO L225 Difference]: With dead ends: 34543 [2022-01-18 16:14:42,775 INFO L226 Difference]: Without dead ends: 34535 [2022-01-18 16:14:42,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10326 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=6811, Invalid=21581, Unknown=0, NotChecked=0, Total=28392 [2022-01-18 16:14:42,777 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1051 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 4721 mSolverCounterSat, 691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1051 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 5412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 4721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:14:42,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1051 Valid, 292 Invalid, 5412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [691 Valid, 4721 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 16:14:42,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34535 states. [2022-01-18 16:14:43,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34535 to 25675. [2022-01-18 16:14:43,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25675 states, 25674 states have (on average 2.361221469190621) internal successors, (60622), 25674 states have internal predecessors, (60622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:43,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25675 states to 25675 states and 60622 transitions. [2022-01-18 16:14:43,274 INFO L78 Accepts]: Start accepts. Automaton has 25675 states and 60622 transitions. Word has length 51 [2022-01-18 16:14:43,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:14:43,274 INFO L470 AbstractCegarLoop]: Abstraction has 25675 states and 60622 transitions. [2022-01-18 16:14:43,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 58 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:43,274 INFO L276 IsEmpty]: Start isEmpty. Operand 25675 states and 60622 transitions. [2022-01-18 16:14:43,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-18 16:14:43,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:14:43,294 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:14:43,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 16:14:43,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-01-18 16:14:43,494 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:14:43,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:14:43,495 INFO L85 PathProgramCache]: Analyzing trace with hash -697184709, now seen corresponding path program 53 times [2022-01-18 16:14:43,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:14:43,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111543415] [2022-01-18 16:14:43,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:14:43,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:14:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:14:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 79 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:14:43,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:14:43,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111543415] [2022-01-18 16:14:43,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111543415] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:14:43,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702441472] [2022-01-18 16:14:43,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:14:43,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:14:43,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:14:43,650 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 16:14:43,651 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 16:14:43,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-01-18 16:14:43,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:14:43,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-18 16:14:43,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:14:44,243 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 49 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:44,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:14:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 49 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:44,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702441472] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:14:44,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:14:44,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24, 24] total 62 [2022-01-18 16:14:44,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563284390] [2022-01-18 16:14:44,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:14:44,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-18 16:14:44,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:14:44,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-18 16:14:44,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=3161, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 16:14:44,979 INFO L87 Difference]: Start difference. First operand 25675 states and 60622 transitions. Second operand has 63 states, 63 states have (on average 2.238095238095238) internal successors, (141), 62 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:54,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:14:54,927 INFO L93 Difference]: Finished difference Result 79019 states and 180082 transitions. [2022-01-18 16:14:54,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 272 states. [2022-01-18 16:14:54,927 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.238095238095238) internal successors, (141), 62 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-18 16:14:54,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:14:55,234 INFO L225 Difference]: With dead ends: 79019 [2022-01-18 16:14:55,234 INFO L226 Difference]: Without dead ends: 78230 [2022-01-18 16:14:55,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52482 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=27833, Invalid=80737, Unknown=0, NotChecked=0, Total=108570 [2022-01-18 16:14:55,237 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1246 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 2901 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 3225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 2901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:14:55,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1246 Valid, 441 Invalid, 3225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 2901 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 16:14:55,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78230 states. [2022-01-18 16:14:55,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78230 to 26716. [2022-01-18 16:14:55,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26716 states, 26715 states have (on average 2.348493355792626) internal successors, (62740), 26715 states have internal predecessors, (62740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:55,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26716 states to 26716 states and 62740 transitions. [2022-01-18 16:14:55,957 INFO L78 Accepts]: Start accepts. Automaton has 26716 states and 62740 transitions. Word has length 51 [2022-01-18 16:14:55,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:14:55,957 INFO L470 AbstractCegarLoop]: Abstraction has 26716 states and 62740 transitions. [2022-01-18 16:14:55,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.238095238095238) internal successors, (141), 62 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:14:55,957 INFO L276 IsEmpty]: Start isEmpty. Operand 26716 states and 62740 transitions. [2022-01-18 16:14:55,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-18 16:14:55,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:14:55,976 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:14:55,994 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 16:14:56,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-01-18 16:14:56,177 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:14:56,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:14:56,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1152851267, now seen corresponding path program 54 times [2022-01-18 16:14:56,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:14:56,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653255564] [2022-01-18 16:14:56,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:14:56,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:14:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:14:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:56,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:14:56,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653255564] [2022-01-18 16:14:56,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653255564] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:14:56,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142296491] [2022-01-18 16:14:56,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:14:56,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:14:56,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:14:56,332 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 16:14:56,332 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 16:14:56,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-18 16:14:56,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:14:56,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-18 16:14:56,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:14:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:57,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:14:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 74 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:14:57,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142296491] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:14:57,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:14:57,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24, 24] total 57 [2022-01-18 16:14:57,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495152270] [2022-01-18 16:14:57,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:14:57,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-18 16:14:57,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:14:57,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-18 16:14:57,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 16:14:57,829 INFO L87 Difference]: Start difference. First operand 26716 states and 62740 transitions. Second operand has 58 states, 58 states have (on average 2.293103448275862) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:03,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:15:03,551 INFO L93 Difference]: Finished difference Result 32210 states and 74811 transitions. [2022-01-18 16:15:03,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-01-18 16:15:03,551 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.293103448275862) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-18 16:15:03,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:15:03,609 INFO L225 Difference]: With dead ends: 32210 [2022-01-18 16:15:03,609 INFO L226 Difference]: Without dead ends: 32204 [2022-01-18 16:15:03,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24859 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=16298, Invalid=48472, Unknown=0, NotChecked=0, Total=64770 [2022-01-18 16:15:03,613 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 646 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:15:03,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [646 Valid, 199 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:15:03,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32204 states. [2022-01-18 16:15:04,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32204 to 25976. [2022-01-18 16:15:04,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25976 states, 25975 states have (on average 2.3487584215591917) internal successors, (61009), 25975 states have internal predecessors, (61009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:04,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25976 states to 25976 states and 61009 transitions. [2022-01-18 16:15:04,077 INFO L78 Accepts]: Start accepts. Automaton has 25976 states and 61009 transitions. Word has length 51 [2022-01-18 16:15:04,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:15:04,077 INFO L470 AbstractCegarLoop]: Abstraction has 25976 states and 61009 transitions. [2022-01-18 16:15:04,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.293103448275862) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:04,077 INFO L276 IsEmpty]: Start isEmpty. Operand 25976 states and 61009 transitions. [2022-01-18 16:15:04,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 16:15:04,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:15:04,096 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:15:04,112 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 16:15:04,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:15:04,296 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:15:04,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:15:04,297 INFO L85 PathProgramCache]: Analyzing trace with hash 2117849603, now seen corresponding path program 55 times [2022-01-18 16:15:04,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:15:04,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501410672] [2022-01-18 16:15:04,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:15:04,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:15:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:15:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:04,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:15:04,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501410672] [2022-01-18 16:15:04,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501410672] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:15:04,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136490654] [2022-01-18 16:15:04,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:15:04,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:15:04,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:15:04,503 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 16:15:04,503 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 16:15:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:15:04,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-18 16:15:04,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:15:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:05,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:15:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 90 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:05,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136490654] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:15:05,934 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:15:05,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 24] total 66 [2022-01-18 16:15:05,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538904853] [2022-01-18 16:15:05,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:15:05,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-18 16:15:05,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:15:05,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-18 16:15:05,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=3587, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 16:15:05,935 INFO L87 Difference]: Start difference. First operand 25976 states and 61009 transitions. Second operand has 67 states, 67 states have (on average 2.1791044776119404) internal successors, (146), 66 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:12,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:15:12,095 INFO L93 Difference]: Finished difference Result 31601 states and 72593 transitions. [2022-01-18 16:15:12,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2022-01-18 16:15:12,096 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1791044776119404) internal successors, (146), 66 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 16:15:12,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:15:12,145 INFO L225 Difference]: With dead ends: 31601 [2022-01-18 16:15:12,145 INFO L226 Difference]: Without dead ends: 30794 [2022-01-18 16:15:12,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26120 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=17002, Invalid=52958, Unknown=0, NotChecked=0, Total=69960 [2022-01-18 16:15:12,149 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 765 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 2431 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 2583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:15:12,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 338 Invalid, 2583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2431 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:15:12,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30794 states. [2022-01-18 16:15:12,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30794 to 25945. [2022-01-18 16:15:12,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25945 states, 25944 states have (on average 2.3479031760715388) internal successors, (60914), 25944 states have internal predecessors, (60914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:12,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25945 states to 25945 states and 60914 transitions. [2022-01-18 16:15:12,549 INFO L78 Accepts]: Start accepts. Automaton has 25945 states and 60914 transitions. Word has length 53 [2022-01-18 16:15:12,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:15:12,549 INFO L470 AbstractCegarLoop]: Abstraction has 25945 states and 60914 transitions. [2022-01-18 16:15:12,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1791044776119404) internal successors, (146), 66 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:12,550 INFO L276 IsEmpty]: Start isEmpty. Operand 25945 states and 60914 transitions. [2022-01-18 16:15:12,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-18 16:15:12,567 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:15:12,567 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:15:12,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-18 16:15:12,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:15:12,769 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:15:12,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:15:12,769 INFO L85 PathProgramCache]: Analyzing trace with hash -226669163, now seen corresponding path program 56 times [2022-01-18 16:15:12,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:15:12,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578274094] [2022-01-18 16:15:12,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:15:12,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:15:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:15:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:12,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:15:12,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578274094] [2022-01-18 16:15:12,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578274094] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:15:12,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079397894] [2022-01-18 16:15:12,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:15:12,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:15:12,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:15:12,903 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 16:15:12,904 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 16:15:12,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:15:12,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:15:12,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:15:12,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:15:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:13,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:15:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:14,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079397894] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:15:14,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:15:14,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 24, 23] total 55 [2022-01-18 16:15:14,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615604679] [2022-01-18 16:15:14,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:15:14,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-18 16:15:14,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:15:14,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-18 16:15:14,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=2334, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 16:15:14,313 INFO L87 Difference]: Start difference. First operand 25945 states and 60914 transitions. Second operand has 56 states, 56 states have (on average 2.4642857142857144) internal successors, (138), 55 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:18,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:15:18,024 INFO L93 Difference]: Finished difference Result 27616 states and 64299 transitions. [2022-01-18 16:15:18,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-01-18 16:15:18,025 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.4642857142857144) internal successors, (138), 55 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-18 16:15:18,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:15:18,071 INFO L225 Difference]: With dead ends: 27616 [2022-01-18 16:15:18,071 INFO L226 Difference]: Without dead ends: 27612 [2022-01-18 16:15:18,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13769 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=10216, Invalid=28790, Unknown=0, NotChecked=0, Total=39006 [2022-01-18 16:15:18,076 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 470 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:15:18,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 123 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:15:18,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27612 states. [2022-01-18 16:15:18,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27612 to 25945. [2022-01-18 16:15:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25945 states, 25944 states have (on average 2.347787542399013) internal successors, (60911), 25944 states have internal predecessors, (60911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25945 states to 25945 states and 60911 transitions. [2022-01-18 16:15:18,515 INFO L78 Accepts]: Start accepts. Automaton has 25945 states and 60911 transitions. Word has length 53 [2022-01-18 16:15:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:15:18,515 INFO L470 AbstractCegarLoop]: Abstraction has 25945 states and 60911 transitions. [2022-01-18 16:15:18,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.4642857142857144) internal successors, (138), 55 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:18,515 INFO L276 IsEmpty]: Start isEmpty. Operand 25945 states and 60911 transitions. [2022-01-18 16:15:18,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-18 16:15:18,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:15:18,536 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:15:18,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 16:15:18,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:15:18,737 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:15:18,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:15:18,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1484254207, now seen corresponding path program 57 times [2022-01-18 16:15:18,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:15:18,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289292168] [2022-01-18 16:15:18,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:15:18,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:15:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:15:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 1 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:18,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:15:18,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289292168] [2022-01-18 16:15:18,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289292168] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:15:18,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839409797] [2022-01-18 16:15:18,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:15:18,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:15:18,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:15:18,890 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 16:15:18,891 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 16:15:18,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-18 16:15:18,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:15:18,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:15:18,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:15:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:19,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:15:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:19,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839409797] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:15:19,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:15:19,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 16] total 29 [2022-01-18 16:15:19,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594214396] [2022-01-18 16:15:19,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:15:19,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:15:19,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:15:19,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:15:19,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:15:19,401 INFO L87 Difference]: Start difference. First operand 25945 states and 60911 transitions. Second operand has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:20,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:15:20,051 INFO L93 Difference]: Finished difference Result 36620 states and 86993 transitions. [2022-01-18 16:15:20,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 16:15:20,051 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-01-18 16:15:20,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:15:20,122 INFO L225 Difference]: With dead ends: 36620 [2022-01-18 16:15:20,122 INFO L226 Difference]: Without dead ends: 36529 [2022-01-18 16:15:20,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=1287, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:15:20,122 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 307 mSDsluCounter, 1637 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:15:20,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 1263 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:15:20,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36529 states. [2022-01-18 16:15:20,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36529 to 31629. [2022-01-18 16:15:20,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31629 states, 31628 states have (on average 2.3720753762488935) internal successors, (75024), 31628 states have internal predecessors, (75024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:20,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31629 states to 31629 states and 75024 transitions. [2022-01-18 16:15:20,766 INFO L78 Accepts]: Start accepts. Automaton has 31629 states and 75024 transitions. Word has length 55 [2022-01-18 16:15:20,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:15:20,766 INFO L470 AbstractCegarLoop]: Abstraction has 31629 states and 75024 transitions. [2022-01-18 16:15:20,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:20,766 INFO L276 IsEmpty]: Start isEmpty. Operand 31629 states and 75024 transitions. [2022-01-18 16:15:20,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-18 16:15:20,791 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:15:20,791 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:15:20,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-01-18 16:15:20,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-18 16:15:20,992 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:15:20,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:15:20,992 INFO L85 PathProgramCache]: Analyzing trace with hash 783619073, now seen corresponding path program 58 times [2022-01-18 16:15:20,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:15:20,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987401991] [2022-01-18 16:15:20,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:15:20,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:15:20,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:15:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:21,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:15:21,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987401991] [2022-01-18 16:15:21,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987401991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:15:21,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061594838] [2022-01-18 16:15:21,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:15:21,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:15:21,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:15:21,367 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 16:15:21,368 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 16:15:21,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:15:21,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:15:21,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2022-01-18 16:15:21,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:15:22,188 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:22,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:15:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 28 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:26,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061594838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:15:26,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:15:26,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 26] total 69 [2022-01-18 16:15:26,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544547875] [2022-01-18 16:15:26,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:15:26,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-18 16:15:26,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:15:26,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-18 16:15:26,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1173, Invalid=3657, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 16:15:26,115 INFO L87 Difference]: Start difference. First operand 31629 states and 75024 transitions. Second operand has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:40,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:15:40,156 INFO L93 Difference]: Finished difference Result 48125 states and 112362 transitions. [2022-01-18 16:15:40,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-18 16:15:40,157 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-01-18 16:15:40,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:15:40,239 INFO L225 Difference]: With dead ends: 48125 [2022-01-18 16:15:40,239 INFO L226 Difference]: Without dead ends: 48119 [2022-01-18 16:15:40,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6059 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=5215, Invalid=14245, Unknown=0, NotChecked=0, Total=19460 [2022-01-18 16:15:40,240 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 844 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 3305 mSolverCounterSat, 574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 3879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 574 IncrementalHoareTripleChecker+Valid, 3305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:15:40,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 254 Invalid, 3879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [574 Valid, 3305 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 16:15:40,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48119 states. [2022-01-18 16:15:40,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48119 to 36125. [2022-01-18 16:15:40,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36125 states, 36124 states have (on average 2.3701140516000443) internal successors, (85618), 36124 states have internal predecessors, (85618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:40,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36125 states to 36125 states and 85618 transitions. [2022-01-18 16:15:40,832 INFO L78 Accepts]: Start accepts. Automaton has 36125 states and 85618 transitions. Word has length 55 [2022-01-18 16:15:40,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:15:40,833 INFO L470 AbstractCegarLoop]: Abstraction has 36125 states and 85618 transitions. [2022-01-18 16:15:40,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:40,833 INFO L276 IsEmpty]: Start isEmpty. Operand 36125 states and 85618 transitions. [2022-01-18 16:15:40,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-18 16:15:40,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:15:40,860 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:15:40,875 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 16:15:41,060 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,SelfDestructingSolverStorable59 [2022-01-18 16:15:41,061 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:15:41,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:15:41,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1260759283, now seen corresponding path program 59 times [2022-01-18 16:15:41,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:15:41,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748957966] [2022-01-18 16:15:41,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:15:41,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:15:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:15:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 88 proven. 113 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 16:15:41,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:15:41,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748957966] [2022-01-18 16:15:41,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748957966] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:15:41,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426954260] [2022-01-18 16:15:41,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:15:41,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:15:41,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:15:41,199 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 16:15:41,199 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 16:15:41,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-01-18 16:15:41,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:15:41,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-18 16:15:41,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:15:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 56 proven. 146 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 16:15:41,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:15:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 64 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:43,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426954260] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:15:43,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:15:43,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24, 26] total 63 [2022-01-18 16:15:43,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115990656] [2022-01-18 16:15:43,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:15:43,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-18 16:15:43,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:15:43,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-18 16:15:43,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=977, Invalid=3055, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 16:15:43,518 INFO L87 Difference]: Start difference. First operand 36125 states and 85618 transitions. Second operand has 64 states, 64 states have (on average 2.28125) internal successors, (146), 63 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:59,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:15:59,656 INFO L93 Difference]: Finished difference Result 92096 states and 212175 transitions. [2022-01-18 16:15:59,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 247 states. [2022-01-18 16:15:59,657 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.28125) internal successors, (146), 63 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-01-18 16:15:59,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:15:59,874 INFO L225 Difference]: With dead ends: 92096 [2022-01-18 16:15:59,874 INFO L226 Difference]: Without dead ends: 91757 [2022-01-18 16:15:59,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48591 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=28862, Invalid=64468, Unknown=0, NotChecked=0, Total=93330 [2022-01-18 16:15:59,878 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1458 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 3203 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1458 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 3623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 3203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:15:59,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1458 Valid, 664 Invalid, 3623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 3203 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 16:15:59,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91757 states. [2022-01-18 16:16:00,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91757 to 46870. [2022-01-18 16:16:00,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46870 states, 46869 states have (on average 2.361091553052124) internal successors, (110662), 46869 states have internal predecessors, (110662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:01,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46870 states to 46870 states and 110662 transitions. [2022-01-18 16:16:01,062 INFO L78 Accepts]: Start accepts. Automaton has 46870 states and 110662 transitions. Word has length 55 [2022-01-18 16:16:01,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:01,062 INFO L470 AbstractCegarLoop]: Abstraction has 46870 states and 110662 transitions. [2022-01-18 16:16:01,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.28125) internal successors, (146), 63 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:01,062 INFO L276 IsEmpty]: Start isEmpty. Operand 46870 states and 110662 transitions. [2022-01-18 16:16:01,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-18 16:16:01,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:01,235 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:01,251 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 16:16:01,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:01,451 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:01,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:01,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1421025927, now seen corresponding path program 60 times [2022-01-18 16:16:01,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:01,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823718723] [2022-01-18 16:16:01,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:01,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:01,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 68 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:01,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:01,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823718723] [2022-01-18 16:16:01,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823718723] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:01,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219844094] [2022-01-18 16:16:01,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:16:01,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:01,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:01,741 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 16:16:01,742 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 16:16:01,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-01-18 16:16:01,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:01,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:16:01,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 68 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:02,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 77 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:03,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219844094] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:03,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:03,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26, 26] total 63 [2022-01-18 16:16:03,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781803388] [2022-01-18 16:16:03,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:03,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-18 16:16:03,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:03,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-18 16:16:03,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=3166, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 16:16:03,404 INFO L87 Difference]: Start difference. First operand 46870 states and 110662 transitions. Second operand has 64 states, 64 states have (on average 2.265625) internal successors, (145), 63 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:11,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:11,574 INFO L93 Difference]: Finished difference Result 76643 states and 178884 transitions. [2022-01-18 16:16:11,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2022-01-18 16:16:11,574 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.265625) internal successors, (145), 63 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-01-18 16:16:11,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:11,724 INFO L225 Difference]: With dead ends: 76643 [2022-01-18 16:16:11,724 INFO L226 Difference]: Without dead ends: 76637 [2022-01-18 16:16:11,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29944 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=18642, Invalid=61164, Unknown=0, NotChecked=0, Total=79806 [2022-01-18 16:16:11,728 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 907 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 2912 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 3291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 2912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:11,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 638 Invalid, 3291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 2912 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 16:16:11,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76637 states. [2022-01-18 16:16:12,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76637 to 45819. [2022-01-18 16:16:12,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45819 states, 45818 states have (on average 2.363874459819285) internal successors, (108308), 45818 states have internal predecessors, (108308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:12,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45819 states to 45819 states and 108308 transitions. [2022-01-18 16:16:12,666 INFO L78 Accepts]: Start accepts. Automaton has 45819 states and 108308 transitions. Word has length 55 [2022-01-18 16:16:12,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:12,666 INFO L470 AbstractCegarLoop]: Abstraction has 45819 states and 108308 transitions. [2022-01-18 16:16:12,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.265625) internal successors, (145), 63 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:12,666 INFO L276 IsEmpty]: Start isEmpty. Operand 45819 states and 108308 transitions. [2022-01-18 16:16:12,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-18 16:16:12,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:12,805 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:12,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:13,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:13,019 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:13,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:13,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1501623287, now seen corresponding path program 61 times [2022-01-18 16:16:13,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:13,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807555815] [2022-01-18 16:16:13,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:13,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 72 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:13,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:13,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807555815] [2022-01-18 16:16:13,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807555815] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:13,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531207669] [2022-01-18 16:16:13,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:16:13,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:13,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:13,319 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 16:16:13,319 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 16:16:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:13,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-18 16:16:13,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 72 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:14,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:15,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531207669] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:15,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:15,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 28] total 73 [2022-01-18 16:16:15,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527564069] [2022-01-18 16:16:15,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:15,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-18 16:16:15,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:15,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-18 16:16:15,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=913, Invalid=4489, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 16:16:15,001 INFO L87 Difference]: Start difference. First operand 45819 states and 108308 transitions. Second operand has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:22,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:22,587 INFO L93 Difference]: Finished difference Result 61421 states and 141782 transitions. [2022-01-18 16:16:22,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2022-01-18 16:16:22,587 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-01-18 16:16:22,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:22,706 INFO L225 Difference]: With dead ends: 61421 [2022-01-18 16:16:22,707 INFO L226 Difference]: Without dead ends: 59909 [2022-01-18 16:16:22,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31582 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=20947, Invalid=63443, Unknown=0, NotChecked=0, Total=84390 [2022-01-18 16:16:22,710 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 935 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 2580 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 2825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 2580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:22,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [935 Valid, 433 Invalid, 2825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 2580 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 16:16:22,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59909 states. [2022-01-18 16:16:23,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59909 to 44402. [2022-01-18 16:16:23,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44402 states, 44401 states have (on average 2.3558027972342965) internal successors, (104600), 44401 states have internal predecessors, (104600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:23,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44402 states to 44402 states and 104600 transitions. [2022-01-18 16:16:23,552 INFO L78 Accepts]: Start accepts. Automaton has 44402 states and 104600 transitions. Word has length 55 [2022-01-18 16:16:23,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:23,552 INFO L470 AbstractCegarLoop]: Abstraction has 44402 states and 104600 transitions. [2022-01-18 16:16:23,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:23,552 INFO L276 IsEmpty]: Start isEmpty. Operand 44402 states and 104600 transitions. [2022-01-18 16:16:23,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-18 16:16:23,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:23,591 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:23,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:23,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:23,795 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:23,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:23,796 INFO L85 PathProgramCache]: Analyzing trace with hash 554537791, now seen corresponding path program 62 times [2022-01-18 16:16:23,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:23,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581928408] [2022-01-18 16:16:23,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:23,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:23,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:24,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:24,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581928408] [2022-01-18 16:16:24,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581928408] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:24,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303871742] [2022-01-18 16:16:24,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:16:24,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:24,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:24,036 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 16:16:24,037 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 16:16:24,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:16:24,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:24,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 46 conjunts are in the unsatisfiable core [2022-01-18 16:16:24,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:24,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 110 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:25,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303871742] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:25,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:25,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 26] total 72 [2022-01-18 16:16:25,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550375684] [2022-01-18 16:16:25,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:25,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-18 16:16:25,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:25,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-18 16:16:25,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=983, Invalid=4273, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 16:16:25,822 INFO L87 Difference]: Start difference. First operand 44402 states and 104600 transitions. Second operand has 73 states, 73 states have (on average 2.164383561643836) internal successors, (158), 72 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:33,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:33,666 INFO L93 Difference]: Finished difference Result 50011 states and 116036 transitions. [2022-01-18 16:16:33,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2022-01-18 16:16:33,667 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.164383561643836) internal successors, (158), 72 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-01-18 16:16:33,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:33,755 INFO L225 Difference]: With dead ends: 50011 [2022-01-18 16:16:33,755 INFO L226 Difference]: Without dead ends: 48994 [2022-01-18 16:16:33,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36195 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=22845, Invalid=71097, Unknown=0, NotChecked=0, Total=93942 [2022-01-18 16:16:33,760 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1228 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 2001 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1228 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 2191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 2001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:33,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1228 Valid, 309 Invalid, 2191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 2001 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:16:33,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48994 states. [2022-01-18 16:16:34,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48994 to 44076. [2022-01-18 16:16:34,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44076 states, 44075 states have (on average 2.3537379466817923) internal successors, (103741), 44075 states have internal predecessors, (103741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:34,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44076 states to 44076 states and 103741 transitions. [2022-01-18 16:16:34,537 INFO L78 Accepts]: Start accepts. Automaton has 44076 states and 103741 transitions. Word has length 57 [2022-01-18 16:16:34,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:34,538 INFO L470 AbstractCegarLoop]: Abstraction has 44076 states and 103741 transitions. [2022-01-18 16:16:34,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.164383561643836) internal successors, (158), 72 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:34,538 INFO L276 IsEmpty]: Start isEmpty. Operand 44076 states and 103741 transitions. [2022-01-18 16:16:34,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-18 16:16:34,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:34,577 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:34,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-01-18 16:16:34,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:34,777 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:34,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:34,778 INFO L85 PathProgramCache]: Analyzing trace with hash -880443627, now seen corresponding path program 63 times [2022-01-18 16:16:34,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:34,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418396495] [2022-01-18 16:16:34,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:34,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:34,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:34,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418396495] [2022-01-18 16:16:34,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418396495] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:34,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765581068] [2022-01-18 16:16:34,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:16:34,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:34,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:34,937 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 16:16:34,938 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 16:16:34,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-01-18 16:16:34,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:34,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 62 conjunts are in the unsatisfiable core [2022-01-18 16:16:34,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:35,815 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 21 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:35,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 31 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:37,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765581068] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:37,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:37,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 27, 27] total 63 [2022-01-18 16:16:37,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243633943] [2022-01-18 16:16:37,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:37,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-18 16:16:37,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:37,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-18 16:16:37,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=852, Invalid=3180, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 16:16:37,298 INFO L87 Difference]: Start difference. First operand 44076 states and 103741 transitions. Second operand has 64 states, 64 states have (on average 2.359375) internal successors, (151), 63 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:46,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:46,779 INFO L93 Difference]: Finished difference Result 50542 states and 118060 transitions. [2022-01-18 16:16:46,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 267 states. [2022-01-18 16:16:46,779 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.359375) internal successors, (151), 63 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-01-18 16:16:46,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:46,880 INFO L225 Difference]: With dead ends: 50542 [2022-01-18 16:16:46,880 INFO L226 Difference]: Without dead ends: 50538 [2022-01-18 16:16:46,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43971 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=26436, Invalid=79514, Unknown=0, NotChecked=0, Total=105950 [2022-01-18 16:16:46,884 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 1019 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 3665 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1019 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 4036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 3665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:46,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1019 Valid, 680 Invalid, 4036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 3665 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 16:16:46,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50538 states. [2022-01-18 16:16:47,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50538 to 44017. [2022-01-18 16:16:47,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44017 states, 44016 states have (on average 2.3667984369320245) internal successors, (104177), 44016 states have internal predecessors, (104177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:47,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44017 states to 44017 states and 104177 transitions. [2022-01-18 16:16:47,646 INFO L78 Accepts]: Start accepts. Automaton has 44017 states and 104177 transitions. Word has length 57 [2022-01-18 16:16:47,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:47,647 INFO L470 AbstractCegarLoop]: Abstraction has 44017 states and 104177 transitions. [2022-01-18 16:16:47,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.359375) internal successors, (151), 63 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:47,647 INFO L276 IsEmpty]: Start isEmpty. Operand 44017 states and 104177 transitions. [2022-01-18 16:16:47,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-18 16:16:47,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:47,683 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:47,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-01-18 16:16:47,884 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,SelfDestructingSolverStorable64 [2022-01-18 16:16:47,884 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:47,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:47,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1275848881, now seen corresponding path program 64 times [2022-01-18 16:16:47,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:47,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956470519] [2022-01-18 16:16:47,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:47,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 89 proven. 127 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:16:48,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:48,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956470519] [2022-01-18 16:16:48,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956470519] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:48,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708110196] [2022-01-18 16:16:48,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:16:48,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:48,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:48,084 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 16:16:48,084 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 16:16:48,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:16:48,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:48,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-18 16:16:48,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:48,823 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 56 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:48,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 72 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:49,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708110196] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:49,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:49,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26, 28] total 71 [2022-01-18 16:16:49,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839679450] [2022-01-18 16:16:49,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:49,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-18 16:16:49,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:49,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-18 16:16:49,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=880, Invalid=4232, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 16:16:49,854 INFO L87 Difference]: Start difference. First operand 44017 states and 104177 transitions. Second operand has 72 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 71 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:00,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:00,418 INFO L93 Difference]: Finished difference Result 93082 states and 211418 transitions. [2022-01-18 16:17:00,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 259 states. [2022-01-18 16:17:00,419 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 71 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-01-18 16:17:00,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:00,605 INFO L225 Difference]: With dead ends: 93082 [2022-01-18 16:17:00,606 INFO L226 Difference]: Without dead ends: 91810 [2022-01-18 16:17:00,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44504 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=25610, Invalid=80340, Unknown=0, NotChecked=0, Total=105950 [2022-01-18 16:17:00,610 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1388 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 3548 mSolverCounterSat, 560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1388 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 4108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 560 IncrementalHoareTripleChecker+Valid, 3548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:00,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1388 Valid, 438 Invalid, 4108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [560 Valid, 3548 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 16:17:00,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91810 states. [2022-01-18 16:17:01,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91810 to 44442. [2022-01-18 16:17:01,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44442 states, 44441 states have (on average 2.3639207038545487) internal successors, (105055), 44441 states have internal predecessors, (105055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:01,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44442 states to 44442 states and 105055 transitions. [2022-01-18 16:17:01,685 INFO L78 Accepts]: Start accepts. Automaton has 44442 states and 105055 transitions. Word has length 57 [2022-01-18 16:17:01,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:17:01,685 INFO L470 AbstractCegarLoop]: Abstraction has 44442 states and 105055 transitions. [2022-01-18 16:17:01,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 71 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:01,686 INFO L276 IsEmpty]: Start isEmpty. Operand 44442 states and 105055 transitions. [2022-01-18 16:17:01,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-18 16:17:01,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:17:01,724 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:17:01,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-01-18 16:17:01,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:01,924 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:17:01,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:17:01,925 INFO L85 PathProgramCache]: Analyzing trace with hash 38084029, now seen corresponding path program 65 times [2022-01-18 16:17:01,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:17:01,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388812348] [2022-01-18 16:17:01,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:17:01,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:17:01,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 98 proven. 113 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-18 16:17:02,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:02,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388812348] [2022-01-18 16:17:02,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388812348] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:02,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913594459] [2022-01-18 16:17:02,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:17:02,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:02,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:02,086 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 16:17:02,087 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 16:17:02,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-01-18 16:17:02,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:17:02,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-18 16:17:02,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:02,771 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 49 proven. 170 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:17:02,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:17:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 49 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:04,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913594459] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:17:04,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:17:04,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26, 27] total 66 [2022-01-18 16:17:04,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32103460] [2022-01-18 16:17:04,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:17:04,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-18 16:17:04,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:17:04,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-18 16:17:04,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=794, Invalid=3628, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 16:17:04,125 INFO L87 Difference]: Start difference. First operand 44442 states and 105055 transitions. Second operand has 67 states, 67 states have (on average 2.283582089552239) internal successors, (153), 66 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:12,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:12,073 INFO L93 Difference]: Finished difference Result 124942 states and 283588 transitions. [2022-01-18 16:17:12,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2022-01-18 16:17:12,074 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.283582089552239) internal successors, (153), 66 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-01-18 16:17:12,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:12,399 INFO L225 Difference]: With dead ends: 124942 [2022-01-18 16:17:12,399 INFO L226 Difference]: Without dead ends: 124468 [2022-01-18 16:17:12,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31245 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=18217, Invalid=55495, Unknown=0, NotChecked=0, Total=73712 [2022-01-18 16:17:12,404 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1125 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 2969 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1125 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 3332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 2969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:12,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1125 Valid, 530 Invalid, 3332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 2969 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 16:17:12,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124468 states. [2022-01-18 16:17:13,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124468 to 53214. [2022-01-18 16:17:14,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53214 states, 53213 states have (on average 2.3461935993084397) internal successors, (124848), 53213 states have internal predecessors, (124848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:14,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53214 states to 53214 states and 124848 transitions. [2022-01-18 16:17:14,167 INFO L78 Accepts]: Start accepts. Automaton has 53214 states and 124848 transitions. Word has length 57 [2022-01-18 16:17:14,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:17:14,167 INFO L470 AbstractCegarLoop]: Abstraction has 53214 states and 124848 transitions. [2022-01-18 16:17:14,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.283582089552239) internal successors, (153), 66 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:14,167 INFO L276 IsEmpty]: Start isEmpty. Operand 53214 states and 124848 transitions. [2022-01-18 16:17:14,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 16:17:14,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:17:14,225 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:17:14,241 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 16:17:14,425 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,SelfDestructingSolverStorable66 [2022-01-18 16:17:14,425 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:17:14,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:17:14,426 INFO L85 PathProgramCache]: Analyzing trace with hash -588351939, now seen corresponding path program 66 times [2022-01-18 16:17:14,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:17:14,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737456756] [2022-01-18 16:17:14,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:17:14,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:17:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 1 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:14,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:14,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737456756] [2022-01-18 16:17:14,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737456756] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:14,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902131617] [2022-01-18 16:17:14,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:17:14,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:14,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:14,579 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 16:17:14,579 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 16:17:14,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-01-18 16:17:14,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:17:14,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-18 16:17:14,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 64 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:14,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:17:15,178 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 100 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:15,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902131617] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:17:15,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:17:15,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24, 17] total 31 [2022-01-18 16:17:15,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491140602] [2022-01-18 16:17:15,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:17:15,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:17:15,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:17:15,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:17:15,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:17:15,180 INFO L87 Difference]: Start difference. First operand 53214 states and 124848 transitions. Second operand has 31 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 31 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:16,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:16,045 INFO L93 Difference]: Finished difference Result 71485 states and 169894 transitions. [2022-01-18 16:17:16,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 16:17:16,045 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 31 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 16:17:16,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:16,430 INFO L225 Difference]: With dead ends: 71485 [2022-01-18 16:17:16,430 INFO L226 Difference]: Without dead ends: 71391 [2022-01-18 16:17:16,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=400, Invalid=1492, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 16:17:16,431 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 321 mSDsluCounter, 2018 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 1551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:16,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 1539 Invalid, 1551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1492 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:17:16,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71391 states. [2022-01-18 16:17:17,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71391 to 63187. [2022-01-18 16:17:17,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63187 states, 63186 states have (on average 2.3767606748330325) internal successors, (150178), 63186 states have internal predecessors, (150178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63187 states to 63187 states and 150178 transitions. [2022-01-18 16:17:17,713 INFO L78 Accepts]: Start accepts. Automaton has 63187 states and 150178 transitions. Word has length 59 [2022-01-18 16:17:17,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:17:17,713 INFO L470 AbstractCegarLoop]: Abstraction has 63187 states and 150178 transitions. [2022-01-18 16:17:17,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 31 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:17,713 INFO L276 IsEmpty]: Start isEmpty. Operand 63187 states and 150178 transitions. [2022-01-18 16:17:17,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 16:17:17,770 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:17:17,770 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:17:17,786 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 16:17:17,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-01-18 16:17:17,971 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:17:17,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:17:17,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1987137683, now seen corresponding path program 67 times [2022-01-18 16:17:17,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:17:17,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078067406] [2022-01-18 16:17:17,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:17:17,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:17:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:18,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:18,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078067406] [2022-01-18 16:17:18,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078067406] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:18,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470912192] [2022-01-18 16:17:18,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:17:18,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:18,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:18,276 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 16:17:18,277 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 16:17:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:18,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 64 conjunts are in the unsatisfiable core [2022-01-18 16:17:18,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:19,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:17:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:23,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470912192] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:17:23,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:17:23,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27, 28] total 68 [2022-01-18 16:17:23,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684601072] [2022-01-18 16:17:23,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:17:23,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-18 16:17:23,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:17:23,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-18 16:17:23,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=987, Invalid=3705, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 16:17:23,488 INFO L87 Difference]: Start difference. First operand 63187 states and 150178 transitions. Second operand has 69 states, 69 states have (on average 2.3768115942028984) internal successors, (164), 68 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:48,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:48,632 INFO L93 Difference]: Finished difference Result 117551 states and 276843 transitions. [2022-01-18 16:17:48,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 213 states. [2022-01-18 16:17:48,632 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.3768115942028984) internal successors, (164), 68 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 16:17:48,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:48,906 INFO L225 Difference]: With dead ends: 117551 [2022-01-18 16:17:48,906 INFO L226 Difference]: Without dead ends: 117509 [2022-01-18 16:17:48,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29336 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=14373, Invalid=62079, Unknown=0, NotChecked=0, Total=76452 [2022-01-18 16:17:48,909 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 2080 mSDsluCounter, 2916 mSDsCounter, 0 mSdLazyCounter, 10758 mSolverCounterSat, 993 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2080 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 11751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 993 IncrementalHoareTripleChecker+Valid, 10758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:48,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2080 Valid, 1543 Invalid, 11751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [993 Valid, 10758 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-01-18 16:17:49,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117509 states. [2022-01-18 16:17:50,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117509 to 78669. [2022-01-18 16:17:50,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78669 states, 78668 states have (on average 2.4081202013525194) internal successors, (189442), 78668 states have internal predecessors, (189442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:50,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78669 states to 78669 states and 189442 transitions. [2022-01-18 16:17:50,872 INFO L78 Accepts]: Start accepts. Automaton has 78669 states and 189442 transitions. Word has length 59 [2022-01-18 16:17:50,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:17:50,872 INFO L470 AbstractCegarLoop]: Abstraction has 78669 states and 189442 transitions. [2022-01-18 16:17:50,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.3768115942028984) internal successors, (164), 68 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:50,873 INFO L276 IsEmpty]: Start isEmpty. Operand 78669 states and 189442 transitions. [2022-01-18 16:17:50,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 16:17:50,934 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:17:50,934 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:17:50,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-01-18 16:17:51,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-01-18 16:17:51,135 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:17:51,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:17:51,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1256771773, now seen corresponding path program 68 times [2022-01-18 16:17:51,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:17:51,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707980869] [2022-01-18 16:17:51,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:17:51,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:17:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:51,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:51,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707980869] [2022-01-18 16:17:51,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707980869] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:51,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885597454] [2022-01-18 16:17:51,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:17:51,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:51,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:51,393 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 16:17:51,393 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 16:17:51,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:17:51,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:17:51,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 64 conjunts are in the unsatisfiable core [2022-01-18 16:17:51,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:52,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:17:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 31 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:56,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885597454] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:17:56,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:17:56,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28, 28] total 68 [2022-01-18 16:17:56,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563503064] [2022-01-18 16:17:56,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:17:56,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-18 16:17:56,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:17:56,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-18 16:17:56,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1098, Invalid=3594, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 16:17:56,878 INFO L87 Difference]: Start difference. First operand 78669 states and 189442 transitions. Second operand has 69 states, 69 states have (on average 2.2753623188405796) internal successors, (157), 68 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:15,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:18:15,902 INFO L93 Difference]: Finished difference Result 93467 states and 225521 transitions. [2022-01-18 16:18:15,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-01-18 16:18:15,902 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.2753623188405796) internal successors, (157), 68 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 16:18:15,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:18:16,098 INFO L225 Difference]: With dead ends: 93467 [2022-01-18 16:18:16,098 INFO L226 Difference]: Without dead ends: 93445 [2022-01-18 16:18:16,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18272 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=11684, Invalid=37822, Unknown=0, NotChecked=0, Total=49506 [2022-01-18 16:18:16,100 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 1389 mSDsluCounter, 1787 mSDsCounter, 0 mSdLazyCounter, 7658 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1389 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 8536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 7658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:18:16,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1389 Valid, 852 Invalid, 8536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 7658 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-18 16:18:16,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93445 states. [2022-01-18 16:18:17,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93445 to 69713. [2022-01-18 16:18:17,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69713 states, 69712 states have (on average 2.4034742942391554) internal successors, (167551), 69712 states have internal predecessors, (167551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:17,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69713 states to 69713 states and 167551 transitions. [2022-01-18 16:18:17,574 INFO L78 Accepts]: Start accepts. Automaton has 69713 states and 167551 transitions. Word has length 59 [2022-01-18 16:18:17,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:18:17,574 INFO L470 AbstractCegarLoop]: Abstraction has 69713 states and 167551 transitions. [2022-01-18 16:18:17,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.2753623188405796) internal successors, (157), 68 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:17,574 INFO L276 IsEmpty]: Start isEmpty. Operand 69713 states and 167551 transitions. [2022-01-18 16:18:17,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 16:18:17,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:18:17,636 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:18:17,653 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 16:18:17,851 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,SelfDestructingSolverStorable69 [2022-01-18 16:18:17,851 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:18:17,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:18:17,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1300336407, now seen corresponding path program 69 times [2022-01-18 16:18:17,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:18:17,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332310097] [2022-01-18 16:18:17,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:18:17,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:18:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:18:18,277 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:18,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:18:18,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332310097] [2022-01-18 16:18:18,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332310097] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:18:18,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185175790] [2022-01-18 16:18:18,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:18:18,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:18,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:18:18,278 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 16:18:18,281 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 16:18:18,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-01-18 16:18:18,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:18:18,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 61 conjunts are in the unsatisfiable core [2022-01-18 16:18:18,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:18:19,090 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:19,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:18:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 6 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:23,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185175790] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:18:23,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:18:23,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 28] total 69 [2022-01-18 16:18:23,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624682644] [2022-01-18 16:18:23,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:18:23,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-18 16:18:23,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:18:23,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-18 16:18:23,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=926, Invalid=3904, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 16:18:23,354 INFO L87 Difference]: Start difference. First operand 69713 states and 167551 transitions. Second operand has 70 states, 70 states have (on average 2.3142857142857145) internal successors, (162), 69 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:55,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:18:55,426 INFO L93 Difference]: Finished difference Result 144092 states and 340742 transitions. [2022-01-18 16:18:55,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-01-18 16:18:55,427 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.3142857142857145) internal successors, (162), 69 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 16:18:55,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:18:55,800 INFO L225 Difference]: With dead ends: 144092 [2022-01-18 16:18:55,800 INFO L226 Difference]: Without dead ends: 144011 [2022-01-18 16:18:55,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 340 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47946 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=22207, Invalid=94415, Unknown=0, NotChecked=0, Total=116622 [2022-01-18 16:18:55,803 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 2185 mSDsluCounter, 2485 mSDsCounter, 0 mSdLazyCounter, 12419 mSolverCounterSat, 1163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2185 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 13582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1163 IncrementalHoareTripleChecker+Valid, 12419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:18:55,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2185 Valid, 1244 Invalid, 13582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1163 Valid, 12419 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-01-18 16:18:55,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144011 states. [2022-01-18 16:18:57,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144011 to 88382. [2022-01-18 16:18:57,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88382 states, 88381 states have (on average 2.4319027845351378) internal successors, (214934), 88381 states have internal predecessors, (214934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:58,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88382 states to 88382 states and 214934 transitions. [2022-01-18 16:18:58,192 INFO L78 Accepts]: Start accepts. Automaton has 88382 states and 214934 transitions. Word has length 59 [2022-01-18 16:18:58,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:18:58,193 INFO L470 AbstractCegarLoop]: Abstraction has 88382 states and 214934 transitions. [2022-01-18 16:18:58,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.3142857142857145) internal successors, (162), 69 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:58,193 INFO L276 IsEmpty]: Start isEmpty. Operand 88382 states and 214934 transitions. [2022-01-18 16:18:58,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 16:18:58,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:18:58,260 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:18:58,275 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 16:18:58,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:58,460 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:18:58,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:18:58,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1468394253, now seen corresponding path program 70 times [2022-01-18 16:18:58,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:18:58,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499906444] [2022-01-18 16:18:58,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:18:58,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:18:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:18:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 81 proven. 152 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-18 16:18:58,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:18:58,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499906444] [2022-01-18 16:18:58,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499906444] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:18:58,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129283154] [2022-01-18 16:18:58,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:18:58,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:58,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:18:58,616 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 16:18:58,617 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 16:18:58,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:18:58,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:18:58,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-18 16:18:58,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:18:59,291 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 56 proven. 176 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-18 16:18:59,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:19:01,743 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 72 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:01,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129283154] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:19:01,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:19:01,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24, 29] total 66 [2022-01-18 16:19:01,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620129188] [2022-01-18 16:19:01,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:19:01,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-18 16:19:01,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:19:01,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-18 16:19:01,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=3472, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 16:19:01,744 INFO L87 Difference]: Start difference. First operand 88382 states and 214934 transitions. Second operand has 67 states, 67 states have (on average 2.328358208955224) internal successors, (156), 66 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:22,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:19:22,754 INFO L93 Difference]: Finished difference Result 222793 states and 531143 transitions. [2022-01-18 16:19:22,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 279 states. [2022-01-18 16:19:22,755 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.328358208955224) internal successors, (156), 66 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 16:19:22,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:19:23,424 INFO L225 Difference]: With dead ends: 222793 [2022-01-18 16:19:23,425 INFO L226 Difference]: Without dead ends: 222270 [2022-01-18 16:19:23,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57237 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=31204, Invalid=84736, Unknown=0, NotChecked=0, Total=115940 [2022-01-18 16:19:23,428 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 1942 mSDsluCounter, 1435 mSDsCounter, 0 mSdLazyCounter, 3651 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1942 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 4195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 3651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:19:23,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1942 Valid, 812 Invalid, 4195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 3651 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 16:19:23,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222270 states. [2022-01-18 16:19:27,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222270 to 135294. [2022-01-18 16:19:27,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135294 states, 135293 states have (on average 2.426112215709608) internal successors, (328236), 135293 states have internal predecessors, (328236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:27,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135294 states to 135294 states and 328236 transitions. [2022-01-18 16:19:27,778 INFO L78 Accepts]: Start accepts. Automaton has 135294 states and 328236 transitions. Word has length 59 [2022-01-18 16:19:27,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:19:27,778 INFO L470 AbstractCegarLoop]: Abstraction has 135294 states and 328236 transitions. [2022-01-18 16:19:27,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.328358208955224) internal successors, (156), 66 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:27,778 INFO L276 IsEmpty]: Start isEmpty. Operand 135294 states and 328236 transitions. [2022-01-18 16:19:27,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 16:19:27,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:19:27,875 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:19:27,890 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 16:19:28,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:28,079 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:19:28,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:19:28,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1511239347, now seen corresponding path program 71 times [2022-01-18 16:19:28,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:19:28,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442373320] [2022-01-18 16:19:28,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:19:28,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:19:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 56 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:19:28,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:19:28,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442373320] [2022-01-18 16:19:28,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442373320] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:19:28,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577933045] [2022-01-18 16:19:28,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:19:28,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:28,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:19:28,330 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 16:19:28,331 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 16:19:28,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-01-18 16:19:28,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:19:28,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-18 16:19:28,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:19:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 56 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:29,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:19:30,251 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 64 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:30,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577933045] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:19:30,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:19:30,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 28] total 75 [2022-01-18 16:19:30,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484614222] [2022-01-18 16:19:30,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:19:30,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-18 16:19:30,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:19:30,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-18 16:19:30,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=4803, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 16:19:30,253 INFO L87 Difference]: Start difference. First operand 135294 states and 328236 transitions. Second operand has 76 states, 76 states have (on average 2.1315789473684212) internal successors, (162), 75 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:39,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:19:39,419 INFO L93 Difference]: Finished difference Result 202243 states and 478613 transitions. [2022-01-18 16:19:39,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2022-01-18 16:19:39,420 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1315789473684212) internal successors, (162), 75 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 16:19:39,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:19:40,014 INFO L225 Difference]: With dead ends: 202243 [2022-01-18 16:19:40,015 INFO L226 Difference]: Without dead ends: 200449 [2022-01-18 16:19:40,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38121 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=20669, Invalid=75121, Unknown=0, NotChecked=0, Total=95790 [2022-01-18 16:19:40,018 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1017 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 4082 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1017 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 4439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 4082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:19:40,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1017 Valid, 356 Invalid, 4439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 4082 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 16:19:40,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200449 states. [2022-01-18 16:19:43,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200449 to 114007. [2022-01-18 16:19:43,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114007 states, 114006 states have (on average 2.4131449221970773) internal successors, (275113), 114006 states have internal predecessors, (275113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:43,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114007 states to 114007 states and 275113 transitions. [2022-01-18 16:19:43,488 INFO L78 Accepts]: Start accepts. Automaton has 114007 states and 275113 transitions. Word has length 59 [2022-01-18 16:19:43,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:19:43,488 INFO L470 AbstractCegarLoop]: Abstraction has 114007 states and 275113 transitions. [2022-01-18 16:19:43,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.1315789473684212) internal successors, (162), 75 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:43,488 INFO L276 IsEmpty]: Start isEmpty. Operand 114007 states and 275113 transitions. [2022-01-18 16:19:43,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-18 16:19:43,831 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:19:43,831 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:19:43,846 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 16:19:44,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:44,046 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:19:44,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:19:44,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1565601971, now seen corresponding path program 72 times [2022-01-18 16:19:44,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:19:44,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147659162] [2022-01-18 16:19:44,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:19:44,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:19:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:44,327 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 72 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:44,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:19:44,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147659162] [2022-01-18 16:19:44,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147659162] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:19:44,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210287881] [2022-01-18 16:19:44,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:19:44,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:44,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:19:44,328 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 16:19:44,329 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 16:19:44,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-01-18 16:19:44,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:19:44,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-18 16:19:44,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:19:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 72 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:45,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:19:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 81 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:46,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210287881] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:19:46,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:19:46,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 77 [2022-01-18 16:19:46,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065833479] [2022-01-18 16:19:46,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:19:46,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-18 16:19:46,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:19:46,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-18 16:19:46,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=968, Invalid=5038, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 16:19:46,214 INFO L87 Difference]: Start difference. First operand 114007 states and 275113 transitions. Second operand has 78 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 77 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:55,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:19:55,632 INFO L93 Difference]: Finished difference Result 152064 states and 360827 transitions. [2022-01-18 16:19:55,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2022-01-18 16:19:55,633 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 77 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-18 16:19:55,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:19:56,017 INFO L225 Difference]: With dead ends: 152064 [2022-01-18 16:19:56,017 INFO L226 Difference]: Without dead ends: 150510 [2022-01-18 16:19:56,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43255 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=23503, Invalid=85067, Unknown=0, NotChecked=0, Total=108570 [2022-01-18 16:19:56,020 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1294 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 3129 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1294 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 3484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 3129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:19:56,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1294 Valid, 390 Invalid, 3484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 3129 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 16:19:56,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150510 states. [2022-01-18 16:19:58,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150510 to 105815. [2022-01-18 16:19:58,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105815 states, 105814 states have (on average 2.402007295820969) internal successors, (254166), 105814 states have internal predecessors, (254166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:58,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105815 states to 105815 states and 254166 transitions. [2022-01-18 16:19:58,790 INFO L78 Accepts]: Start accepts. Automaton has 105815 states and 254166 transitions. Word has length 59 [2022-01-18 16:19:58,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:19:58,791 INFO L470 AbstractCegarLoop]: Abstraction has 105815 states and 254166 transitions. [2022-01-18 16:19:58,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 77 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:58,791 INFO L276 IsEmpty]: Start isEmpty. Operand 105815 states and 254166 transitions. [2022-01-18 16:19:58,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-18 16:19:58,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:19:58,876 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:19:58,891 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 16:19:59,076 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,SelfDestructingSolverStorable73 [2022-01-18 16:19:59,076 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:19:59,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:19:59,076 INFO L85 PathProgramCache]: Analyzing trace with hash 218506875, now seen corresponding path program 73 times [2022-01-18 16:19:59,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:19:59,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737212996] [2022-01-18 16:19:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:19:59,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:19:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:59,345 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:59,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:19:59,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737212996] [2022-01-18 16:19:59,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737212996] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:19:59,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896429694] [2022-01-18 16:19:59,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:19:59,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:59,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:19:59,347 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 16:19:59,347 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 16:19:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:59,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-18 16:19:59,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:00,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 132 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:01,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896429694] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:01,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:01,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 28] total 78 [2022-01-18 16:20:01,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694967348] [2022-01-18 16:20:01,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:01,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-18 16:20:01,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:01,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-18 16:20:01,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1143, Invalid=5019, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 16:20:01,238 INFO L87 Difference]: Start difference. First operand 105815 states and 254166 transitions. Second operand has 79 states, 79 states have (on average 2.151898734177215) internal successors, (170), 78 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:11,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:11,308 INFO L93 Difference]: Finished difference Result 111709 states and 265887 transitions. [2022-01-18 16:20:11,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 278 states. [2022-01-18 16:20:11,309 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.151898734177215) internal successors, (170), 78 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-01-18 16:20:11,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:11,550 INFO L225 Difference]: With dead ends: 111709 [2022-01-18 16:20:11,550 INFO L226 Difference]: Without dead ends: 110518 [2022-01-18 16:20:11,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48991 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=30076, Invalid=93476, Unknown=0, NotChecked=0, Total=123552 [2022-01-18 16:20:11,555 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1303 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 2455 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1303 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 2673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 2455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:11,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1303 Valid, 361 Invalid, 2673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 2455 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 16:20:11,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110518 states. [2022-01-18 16:20:13,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110518 to 105662. [2022-01-18 16:20:13,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105662 states, 105661 states have (on average 2.401501026868949) internal successors, (253745), 105661 states have internal predecessors, (253745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:13,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105662 states to 105662 states and 253745 transitions. [2022-01-18 16:20:13,842 INFO L78 Accepts]: Start accepts. Automaton has 105662 states and 253745 transitions. Word has length 61 [2022-01-18 16:20:13,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:13,842 INFO L470 AbstractCegarLoop]: Abstraction has 105662 states and 253745 transitions. [2022-01-18 16:20:13,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.151898734177215) internal successors, (170), 78 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:13,842 INFO L276 IsEmpty]: Start isEmpty. Operand 105662 states and 253745 transitions. [2022-01-18 16:20:13,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-18 16:20:13,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:13,929 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:13,944 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 16:20:14,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:14,130 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:20:14,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:14,130 INFO L85 PathProgramCache]: Analyzing trace with hash 970555797, now seen corresponding path program 74 times [2022-01-18 16:20:14,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:14,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130744857] [2022-01-18 16:20:14,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:14,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:14,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:14,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130744857] [2022-01-18 16:20:14,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130744857] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:14,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631227345] [2022-01-18 16:20:14,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:20:14,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:14,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:14,296 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 16:20:14,296 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 16:20:14,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:20:14,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:14,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:20:14,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:15,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:16,277 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:16,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631227345] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:16,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:16,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 28, 27] total 65 [2022-01-18 16:20:16,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394600048] [2022-01-18 16:20:16,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:16,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-18 16:20:16,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:16,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-18 16:20:16,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3265, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 16:20:16,279 INFO L87 Difference]: Start difference. First operand 105662 states and 253745 transitions. Second operand has 66 states, 66 states have (on average 2.4545454545454546) internal successors, (162), 65 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:22,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:22,420 INFO L93 Difference]: Finished difference Result 108123 states and 258768 transitions. [2022-01-18 16:20:22,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2022-01-18 16:20:22,421 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.4545454545454546) internal successors, (162), 65 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-01-18 16:20:22,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:22,684 INFO L225 Difference]: With dead ends: 108123 [2022-01-18 16:20:22,684 INFO L226 Difference]: Without dead ends: 108119 [2022-01-18 16:20:22,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25401 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=17508, Invalid=49832, Unknown=0, NotChecked=0, Total=67340 [2022-01-18 16:20:22,688 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 461 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 1716 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:22,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 177 Invalid, 1815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1716 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:20:22,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108119 states. [2022-01-18 16:20:24,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108119 to 105530. [2022-01-18 16:20:24,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105530 states, 105529 states have (on average 2.4019748126107516) internal successors, (253478), 105529 states have internal predecessors, (253478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:25,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105530 states to 105530 states and 253478 transitions. [2022-01-18 16:20:25,120 INFO L78 Accepts]: Start accepts. Automaton has 105530 states and 253478 transitions. Word has length 61 [2022-01-18 16:20:25,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:25,120 INFO L470 AbstractCegarLoop]: Abstraction has 105530 states and 253478 transitions. [2022-01-18 16:20:25,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.4545454545454546) internal successors, (162), 65 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:25,121 INFO L276 IsEmpty]: Start isEmpty. Operand 105530 states and 253478 transitions. [2022-01-18 16:20:25,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-18 16:20:25,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:25,205 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:25,220 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 16:20:25,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:25,405 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:20:25,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:25,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1163558027, now seen corresponding path program 75 times [2022-01-18 16:20:25,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:25,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174337998] [2022-01-18 16:20:25,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:25,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 99 proven. 155 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-18 16:20:25,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:25,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174337998] [2022-01-18 16:20:25,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174337998] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:25,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109973513] [2022-01-18 16:20:25,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:20:25,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:25,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:25,580 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 16:20:25,580 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 16:20:25,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-18 16:20:25,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:25,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-18 16:20:25,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 56 proven. 207 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:20:26,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 72 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:28,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109973513] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:28,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:28,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27, 30] total 73 [2022-01-18 16:20:28,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924912711] [2022-01-18 16:20:28,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:28,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-18 16:20:28,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:28,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-18 16:20:28,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=971, Invalid=4431, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 16:20:28,124 INFO L87 Difference]: Start difference. First operand 105530 states and 253478 transitions. Second operand has 74 states, 74 states have (on average 2.2162162162162162) internal successors, (164), 73 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:40,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:40,406 INFO L93 Difference]: Finished difference Result 236823 states and 557165 transitions. [2022-01-18 16:20:40,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 247 states. [2022-01-18 16:20:40,406 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2162162162162162) internal successors, (164), 73 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-01-18 16:20:40,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:41,242 INFO L225 Difference]: With dead ends: 236823 [2022-01-18 16:20:41,242 INFO L226 Difference]: Without dead ends: 236370 [2022-01-18 16:20:41,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42883 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=23732, Invalid=75808, Unknown=0, NotChecked=0, Total=99540 [2022-01-18 16:20:41,245 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1497 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 3389 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1497 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 3940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 3389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:41,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1497 Valid, 434 Invalid, 3940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 3389 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 16:20:41,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236370 states. [2022-01-18 16:20:43,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236370 to 106779. [2022-01-18 16:20:44,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106779 states, 106778 states have (on average 2.4088576298488453) internal successors, (257213), 106778 states have internal predecessors, (257213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:44,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106779 states to 106779 states and 257213 transitions. [2022-01-18 16:20:44,544 INFO L78 Accepts]: Start accepts. Automaton has 106779 states and 257213 transitions. Word has length 61 [2022-01-18 16:20:44,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:44,545 INFO L470 AbstractCegarLoop]: Abstraction has 106779 states and 257213 transitions. [2022-01-18 16:20:44,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2162162162162162) internal successors, (164), 73 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:44,545 INFO L276 IsEmpty]: Start isEmpty. Operand 106779 states and 257213 transitions. [2022-01-18 16:20:44,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-18 16:20:44,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:44,629 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:44,644 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 16:20:44,829 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,SelfDestructingSolverStorable76 [2022-01-18 16:20:44,829 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:20:44,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:44,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1391515015, now seen corresponding path program 76 times [2022-01-18 16:20:44,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:44,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150710068] [2022-01-18 16:20:44,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:44,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:44,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:44,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150710068] [2022-01-18 16:20:44,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150710068] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:44,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922830053] [2022-01-18 16:20:44,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:20:44,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:44,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:44,994 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 16:20:44,995 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 16:20:45,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:20:45,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:45,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-18 16:20:45,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:45,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:46,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922830053] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:46,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:46,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 27] total 39 [2022-01-18 16:20:46,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069030093] [2022-01-18 16:20:46,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:46,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 16:20:46,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:46,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 16:20:46,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1107, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 16:20:46,449 INFO L87 Difference]: Start difference. First operand 106779 states and 257213 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:47,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:47,364 INFO L93 Difference]: Finished difference Result 126411 states and 307272 transitions. [2022-01-18 16:20:47,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 16:20:47,364 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-18 16:20:47,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:47,643 INFO L225 Difference]: With dead ends: 126411 [2022-01-18 16:20:47,644 INFO L226 Difference]: Without dead ends: 126324 [2022-01-18 16:20:47,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=375, Invalid=1107, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 16:20:47,644 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 545 mSDsluCounter, 1877 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:47,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 1414 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:20:47,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126324 states. [2022-01-18 16:20:49,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126324 to 125700. [2022-01-18 16:20:49,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125700 states, 125699 states have (on average 2.4344028194337266) internal successors, (306002), 125699 states have internal predecessors, (306002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:50,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125700 states to 125700 states and 306002 transitions. [2022-01-18 16:20:50,255 INFO L78 Accepts]: Start accepts. Automaton has 125700 states and 306002 transitions. Word has length 63 [2022-01-18 16:20:50,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:50,255 INFO L470 AbstractCegarLoop]: Abstraction has 125700 states and 306002 transitions. [2022-01-18 16:20:50,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:50,256 INFO L276 IsEmpty]: Start isEmpty. Operand 125700 states and 306002 transitions. [2022-01-18 16:20:50,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-18 16:20:50,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:50,354 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:50,370 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 16:20:50,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-01-18 16:20:50,554 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:20:50,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:50,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1351434417, now seen corresponding path program 77 times [2022-01-18 16:20:50,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:50,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238599271] [2022-01-18 16:20:50,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:50,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:50,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:50,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238599271] [2022-01-18 16:20:50,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238599271] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:50,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686785081] [2022-01-18 16:20:50,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:20:50,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:50,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:50,851 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 16:20:50,852 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 16:20:50,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-01-18 16:20:50,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:50,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 73 conjunts are in the unsatisfiable core [2022-01-18 16:20:50,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:52,063 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:52,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:57,903 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:57,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686785081] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:57,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:57,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 30, 30] total 74 [2022-01-18 16:20:57,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775470988] [2022-01-18 16:20:57,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:57,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-18 16:20:57,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:57,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-18 16:20:57,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1158, Invalid=4392, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 16:20:57,904 INFO L87 Difference]: Start difference. First operand 125700 states and 306002 transitions. Second operand has 75 states, 75 states have (on average 2.36) internal successors, (177), 74 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:34,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:34,693 INFO L93 Difference]: Finished difference Result 217963 states and 521265 transitions. [2022-01-18 16:21:34,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2022-01-18 16:21:34,694 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.36) internal successors, (177), 74 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-18 16:21:34,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:35,258 INFO L225 Difference]: With dead ends: 217963 [2022-01-18 16:21:35,258 INFO L226 Difference]: Without dead ends: 217918 [2022-01-18 16:21:35,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34219 ImplicationChecksByTransitivity, 32.7s TimeCoverageRelationStatistics Valid=16938, Invalid=70974, Unknown=0, NotChecked=0, Total=87912 [2022-01-18 16:21:35,261 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 2659 mSDsluCounter, 4445 mSDsCounter, 0 mSdLazyCounter, 15011 mSolverCounterSat, 1190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2659 SdHoareTripleChecker+Valid, 2387 SdHoareTripleChecker+Invalid, 16201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1190 IncrementalHoareTripleChecker+Valid, 15011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:35,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2659 Valid, 2387 Invalid, 16201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1190 Valid, 15011 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-01-18 16:21:35,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217918 states. [2022-01-18 16:21:38,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217918 to 155024. [2022-01-18 16:21:38,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155024 states, 155023 states have (on average 2.4420956890267895) internal successors, (378581), 155023 states have internal predecessors, (378581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:39,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155024 states to 155024 states and 378581 transitions. [2022-01-18 16:21:39,500 INFO L78 Accepts]: Start accepts. Automaton has 155024 states and 378581 transitions. Word has length 63 [2022-01-18 16:21:39,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:39,500 INFO L470 AbstractCegarLoop]: Abstraction has 155024 states and 378581 transitions. [2022-01-18 16:21:39,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.36) internal successors, (177), 74 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:39,500 INFO L276 IsEmpty]: Start isEmpty. Operand 155024 states and 378581 transitions. [2022-01-18 16:21:39,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-18 16:21:39,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:39,598 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:39,614 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 16:21:39,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:39,798 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:39,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:39,799 INFO L85 PathProgramCache]: Analyzing trace with hash -2081800327, now seen corresponding path program 78 times [2022-01-18 16:21:39,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:39,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614862120] [2022-01-18 16:21:39,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:39,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 23 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:40,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:40,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614862120] [2022-01-18 16:21:40,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614862120] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:40,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801051006] [2022-01-18 16:21:40,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:21:40,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:40,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:40,118 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 16:21:40,118 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 16:21:40,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-01-18 16:21:40,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:40,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 70 conjunts are in the unsatisfiable core [2022-01-18 16:21:40,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:41,044 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 23 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:41,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:46,921 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 34 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:46,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801051006] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:46,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:46,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 30, 30] total 73 [2022-01-18 16:21:46,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867289677] [2022-01-18 16:21:46,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:46,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-18 16:21:46,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:46,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-18 16:21:46,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1270, Invalid=4132, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 16:21:46,922 INFO L87 Difference]: Start difference. First operand 155024 states and 378581 transitions. Second operand has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 73 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:11,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:11,419 INFO L93 Difference]: Finished difference Result 177105 states and 432929 transitions. [2022-01-18 16:22:11,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-01-18 16:22:11,420 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 73 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-18 16:22:11,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:12,002 INFO L225 Difference]: With dead ends: 177105 [2022-01-18 16:22:12,003 INFO L226 Difference]: Without dead ends: 177081 [2022-01-18 16:22:12,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21664 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=13703, Invalid=44619, Unknown=0, NotChecked=0, Total=58322 [2022-01-18 16:22:12,004 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 1719 mSDsluCounter, 2040 mSDsCounter, 0 mSdLazyCounter, 9447 mSolverCounterSat, 833 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1719 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 10280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 833 IncrementalHoareTripleChecker+Valid, 9447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:12,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1719 Valid, 992 Invalid, 10280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [833 Valid, 9447 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-01-18 16:22:12,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177081 states. [2022-01-18 16:22:14,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177081 to 135562. [2022-01-18 16:22:14,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135562 states, 135561 states have (on average 2.4290467022226157) internal successors, (329284), 135561 states have internal predecessors, (329284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:15,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135562 states to 135562 states and 329284 transitions. [2022-01-18 16:22:15,222 INFO L78 Accepts]: Start accepts. Automaton has 135562 states and 329284 transitions. Word has length 63 [2022-01-18 16:22:15,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:15,222 INFO L470 AbstractCegarLoop]: Abstraction has 135562 states and 329284 transitions. [2022-01-18 16:22:15,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 73 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:15,222 INFO L276 IsEmpty]: Start isEmpty. Operand 135562 states and 329284 transitions. [2022-01-18 16:22:15,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-18 16:22:15,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:15,320 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:15,335 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 16:22:15,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:15,520 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:15,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:15,521 INFO L85 PathProgramCache]: Analyzing trace with hash 2077265363, now seen corresponding path program 79 times [2022-01-18 16:22:15,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:15,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543321407] [2022-01-18 16:22:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:15,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 2 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:15,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:15,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543321407] [2022-01-18 16:22:15,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543321407] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:15,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177792576] [2022-01-18 16:22:15,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:22:15,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:15,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:15,822 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 16:22:15,823 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 16:22:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:15,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 70 conjunts are in the unsatisfiable core [2022-01-18 16:22:15,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 2 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:16,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 6 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:22,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177792576] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:22,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:22,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 29, 31] total 76 [2022-01-18 16:22:22,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074597794] [2022-01-18 16:22:22,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:22,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-18 16:22:22,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:22,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-18 16:22:22,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1110, Invalid=4742, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 16:22:22,105 INFO L87 Difference]: Start difference. First operand 135562 states and 329284 transitions. Second operand has 77 states, 77 states have (on average 2.311688311688312) internal successors, (178), 76 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:03,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:03,697 INFO L93 Difference]: Finished difference Result 245356 states and 584194 transitions. [2022-01-18 16:23:03,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 304 states. [2022-01-18 16:23:03,698 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.311688311688312) internal successors, (178), 76 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-18 16:23:03,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:04,581 INFO L225 Difference]: With dead ends: 245356 [2022-01-18 16:23:04,582 INFO L226 Difference]: Without dead ends: 245275 [2022-01-18 16:23:04,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 374 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57436 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=26282, Invalid=114718, Unknown=0, NotChecked=0, Total=141000 [2022-01-18 16:23:04,585 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 2778 mSDsluCounter, 2574 mSDsCounter, 0 mSdLazyCounter, 12091 mSolverCounterSat, 1307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2778 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 13398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1307 IncrementalHoareTripleChecker+Valid, 12091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:04,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2778 Valid, 1285 Invalid, 13398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1307 Valid, 12091 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-01-18 16:23:04,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245275 states. [2022-01-18 16:23:08,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245275 to 146308. [2022-01-18 16:23:08,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146308 states, 146307 states have (on average 2.4305603969734872) internal successors, (355608), 146307 states have internal predecessors, (355608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:08,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146308 states to 146308 states and 355608 transitions. [2022-01-18 16:23:08,987 INFO L78 Accepts]: Start accepts. Automaton has 146308 states and 355608 transitions. Word has length 63 [2022-01-18 16:23:08,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:08,987 INFO L470 AbstractCegarLoop]: Abstraction has 146308 states and 355608 transitions. [2022-01-18 16:23:08,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.311688311688312) internal successors, (178), 76 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:08,987 INFO L276 IsEmpty]: Start isEmpty. Operand 146308 states and 355608 transitions. [2022-01-18 16:23:09,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-18 16:23:09,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:09,081 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:09,097 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 16:23:09,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:09,281 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:09,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:09,282 INFO L85 PathProgramCache]: Analyzing trace with hash 196528471, now seen corresponding path program 80 times [2022-01-18 16:23:09,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:09,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316774964] [2022-01-18 16:23:09,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:09,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 6 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:09,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:09,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316774964] [2022-01-18 16:23:09,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316774964] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:09,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466664986] [2022-01-18 16:23:09,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:23:09,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:09,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:09,574 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 16:23:09,574 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 16:23:09,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:23:09,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:09,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 64 conjunts are in the unsatisfiable core [2022-01-18 16:23:09,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:10,460 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 6 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:10,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2022-01-18 16:23:10,974 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-01-18 16:23:10,975 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-18 16:23:10,976 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 16:23:10,992 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 16:23:11,018 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 16:23:11,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:11,176 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 64 with TraceHistMax 12,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 0ms.. [2022-01-18 16:23:11,180 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 16:23:11,180 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 16:23:11,182 INFO L732 BasicCegarLoop]: Path program histogram: [80, 1, 1] [2022-01-18 16:23:11,187 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 16:23:11,187 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 16:23:11,189 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 04:23:11 BasicIcfg [2022-01-18 16:23:11,189 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 16:23:11,193 INFO L158 Benchmark]: Toolchain (without parser) took 739844.10ms. Allocated memory was 413.1MB in the beginning and 11.1GB in the end (delta: 10.7GB). Free memory was 372.5MB in the beginning and 5.4GB in the end (delta: -5.1GB). Peak memory consumption was 5.6GB. Max. memory is 16.0GB. [2022-01-18 16:23:11,193 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 413.1MB. Free memory is still 373.6MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 16:23:11,193 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.19ms. Allocated memory is still 413.1MB. Free memory was 372.4MB in the beginning and 370.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 16:23:11,193 INFO L158 Benchmark]: Boogie Preprocessor took 9.50ms. Allocated memory is still 413.1MB. Free memory was 370.9MB in the beginning and 370.0MB in the end (delta: 921.3kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 16:23:11,193 INFO L158 Benchmark]: RCFGBuilder took 169.18ms. Allocated memory is still 413.1MB. Free memory was 370.0MB in the beginning and 361.0MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 16:23:11,193 INFO L158 Benchmark]: TraceAbstraction took 739636.26ms. Allocated memory was 413.1MB in the beginning and 11.1GB in the end (delta: 10.7GB). Free memory was 360.6MB in the beginning and 5.4GB in the end (delta: -5.1GB). Peak memory consumption was 5.6GB. Max. memory is 16.0GB. [2022-01-18 16:23:11,194 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 0.11ms. Allocated memory is still 413.1MB. Free memory is still 373.6MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 24.19ms. Allocated memory is still 413.1MB. Free memory was 372.4MB in the beginning and 370.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 9.50ms. Allocated memory is still 413.1MB. Free memory was 370.9MB in the beginning and 370.0MB in the end (delta: 921.3kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 169.18ms. Allocated memory is still 413.1MB. Free memory was 370.0MB in the beginning and 361.0MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 739636.26ms. Allocated memory was 413.1MB in the beginning and 11.1GB in the end (delta: 10.7GB). Free memory was 360.6MB in the beginning and 5.4GB in the end (delta: -5.1GB). Peak memory consumption was 5.6GB. 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: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 64 with TraceHistMax 12,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 0ms.. - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 64 with TraceHistMax 12,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 0ms.. - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 64 with TraceHistMax 12,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 739.5s, OverallIterations: 82, TraceHistogramMax: 12, PathProgramHistogramMax: 80, EmptinessCheckTime: 2.3s, AutomataDifference: 523.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 60071 SdHoareTripleChecker+Valid, 75.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 60071 mSDsluCounter, 34853 SdHoareTripleChecker+Invalid, 63.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 62866 mSDsCounter, 21760 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 187354 IncrementalHoareTripleChecker+Invalid, 209114 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21760 mSolverCounterUnsat, 2210 mSDtfsCounter, 187354 mSolverCounterSat, 0.6s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 17441 GetRequests, 4621 SyntacticMatches, 116 SemanticMatches, 12704 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198507 ImplicationChecksByTransitivity, 460.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=155024occurred in iteration=79, InterpolantAutomatonStates: 9675, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 56.4s AutomataMinimizationTime, 81 MinimizatonAttempts, 1143079 StatesRemovedByMinimization, 81 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 135.5s InterpolantComputationTime, 6914 NumberOfCodeBlocks, 6914 NumberOfCodeBlocksAsserted, 506 NumberOfCheckSat, 10116 ConstructedInterpolants, 0 QuantifiedInterpolants, 148807 SizeOfPredicates, 586 NumberOfNonLiveVariables, 7931 ConjunctsInSsa, 2785 ConjunctsInUnsatCore, 239 InterpolantComputations, 2 PerfectInterpolantSequences, 7780/29167 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