/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de62.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 04:55:55,628 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 04:55:55,695 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 04:55:55,702 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 04:55:55,702 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 04:55:55,744 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 04:55:55,744 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 04:55:55,744 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 04:55:55,745 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 04:55:55,748 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 04:55:55,749 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 04:55:55,749 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 04:55:55,750 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 04:55:55,750 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 04:55:55,751 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 04:55:55,751 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 04:55:55,751 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 04:55:55,751 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 04:55:55,752 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 04:55:55,752 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 04:55:55,753 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 04:55:55,753 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 04:55:55,753 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 04:55:55,753 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 04:55:55,754 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 04:55:55,754 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 04:55:55,754 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 04:55:55,754 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 04:55:55,755 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 04:55:55,755 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 04:55:55,756 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 04:55:55,756 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 04:55:55,756 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 04:55:55,756 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 04:55:55,756 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 04:55:55,756 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 04:55:55,757 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 04:55:55,757 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 04:55:55,757 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 04:55:55,757 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 04:55:55,757 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 04:55:55,757 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 04:55:55,757 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 04:55:55,758 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 04:55:55,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 04:55:56,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 04:55:56,018 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 04:55:56,019 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 04:55:56,019 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 04:55:56,020 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de62.c [2023-12-21 04:55:57,177 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 04:55:57,378 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 04:55:57,380 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de62.c [2023-12-21 04:55:57,386 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/012b84e5d/d421c672990a419c8fc7c180627fa14f/FLAGe5b687132 [2023-12-21 04:55:57,403 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/012b84e5d/d421c672990a419c8fc7c180627fa14f [2023-12-21 04:55:57,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 04:55:57,407 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 04:55:57,408 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 04:55:57,408 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 04:55:57,413 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 04:55:57,413 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:55:57" (1/1) ... [2023-12-21 04:55:57,414 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6743d235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:55:57, skipping insertion in model container [2023-12-21 04:55:57,414 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:55:57" (1/1) ... [2023-12-21 04:55:57,435 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 04:55:57,562 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de62.c[368,381] [2023-12-21 04:55:57,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 04:55:57,583 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 04:55:57,592 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de62.c[368,381] [2023-12-21 04:55:57,597 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 04:55:57,609 INFO L206 MainTranslator]: Completed translation [2023-12-21 04:55:57,610 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:55:57 WrapperNode [2023-12-21 04:55:57,610 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 04:55:57,611 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 04:55:57,611 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 04:55:57,611 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 04:55:57,616 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:55:57" (1/1) ... [2023-12-21 04:55:57,621 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:55:57" (1/1) ... [2023-12-21 04:55:57,637 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2023-12-21 04:55:57,637 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 04:55:57,638 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 04:55:57,638 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 04:55:57,638 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 04:55:57,647 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:55:57" (1/1) ... [2023-12-21 04:55:57,647 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:55:57" (1/1) ... [2023-12-21 04:55:57,649 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:55:57" (1/1) ... [2023-12-21 04:55:57,658 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-21 04:55:57,658 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:55:57" (1/1) ... [2023-12-21 04:55:57,658 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:55:57" (1/1) ... [2023-12-21 04:55:57,661 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:55:57" (1/1) ... [2023-12-21 04:55:57,664 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:55:57" (1/1) ... [2023-12-21 04:55:57,665 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:55:57" (1/1) ... [2023-12-21 04:55:57,666 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:55:57" (1/1) ... [2023-12-21 04:55:57,668 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 04:55:57,668 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 04:55:57,668 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 04:55:57,669 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 04:55:57,669 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:55:57" (1/1) ... [2023-12-21 04:55:57,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 04:55:57,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:55:57,700 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-21 04:55:57,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-21 04:55:57,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 04:55:57,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 04:55:57,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 04:55:57,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 04:55:57,811 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 04:55:57,814 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 04:55:57,981 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 04:55:58,001 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 04:55:58,002 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-12-21 04:55:58,002 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:55:58 BoogieIcfgContainer [2023-12-21 04:55:58,002 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 04:55:58,009 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 04:55:58,009 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 04:55:58,012 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 04:55:58,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 04:55:57" (1/3) ... [2023-12-21 04:55:58,013 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57fe66dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:55:58, skipping insertion in model container [2023-12-21 04:55:58,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:55:57" (2/3) ... [2023-12-21 04:55:58,013 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57fe66dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:55:58, skipping insertion in model container [2023-12-21 04:55:58,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:55:58" (3/3) ... [2023-12-21 04:55:58,014 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de62.c [2023-12-21 04:55:58,028 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 04:55:58,028 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 04:55:58,064 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 04:55:58,070 INFO L357 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@52fb87fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 04:55:58,070 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 04:55:58,074 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:58,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-21 04:55:58,082 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:55:58,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:55:58,085 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:55:58,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:55:58,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1862478825, now seen corresponding path program 1 times [2023-12-21 04:55:58,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:55:58,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169736789] [2023-12-21 04:55:58,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:55:58,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:55:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:55:58,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:55:58,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:55:58,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169736789] [2023-12-21 04:55:58,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169736789] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 04:55:58,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 04:55:58,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 04:55:58,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123012257] [2023-12-21 04:55:58,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:55:58,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-21 04:55:58,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:55:58,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-21 04:55:58,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 04:55:58,261 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:58,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:55:58,284 INFO L93 Difference]: Finished difference Result 26 states and 48 transitions. [2023-12-21 04:55:58,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-21 04:55:58,286 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-21 04:55:58,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:55:58,291 INFO L225 Difference]: With dead ends: 26 [2023-12-21 04:55:58,291 INFO L226 Difference]: Without dead ends: 12 [2023-12-21 04:55:58,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 04:55:58,296 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:55:58,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:55:58,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-12-21 04:55:58,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-12-21 04:55:58,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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) [2023-12-21 04:55:58,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2023-12-21 04:55:58,319 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 11 [2023-12-21 04:55:58,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:55:58,319 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2023-12-21 04:55:58,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:58,319 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2023-12-21 04:55:58,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-21 04:55:58,320 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:55:58,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:55:58,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-21 04:55:58,320 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:55:58,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:55:58,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1976995429, now seen corresponding path program 1 times [2023-12-21 04:55:58,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:55:58,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194049581] [2023-12-21 04:55:58,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:55:58,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:55:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:55:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:55:58,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:55:58,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194049581] [2023-12-21 04:55:58,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194049581] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 04:55:58,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 04:55:58,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 04:55:58,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116347839] [2023-12-21 04:55:58,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:55:58,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 04:55:58,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:55:58,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 04:55:58,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 04:55:58,534 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:58,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:55:58,602 INFO L93 Difference]: Finished difference Result 26 states and 38 transitions. [2023-12-21 04:55:58,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 04:55:58,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-21 04:55:58,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:55:58,603 INFO L225 Difference]: With dead ends: 26 [2023-12-21 04:55:58,603 INFO L226 Difference]: Without dead ends: 17 [2023-12-21 04:55:58,603 INFO L412 NwaCegarLoop]: 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 [2023-12-21 04:55:58,605 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:55:58,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:55:58,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-21 04:55:58,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-21 04:55:58,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:58,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 25 transitions. [2023-12-21 04:55:58,612 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 25 transitions. Word has length 11 [2023-12-21 04:55:58,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:55:58,612 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 25 transitions. [2023-12-21 04:55:58,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:58,612 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 25 transitions. [2023-12-21 04:55:58,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-21 04:55:58,613 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:55:58,613 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:55:58,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-21 04:55:58,613 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:55:58,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:55:58,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1155650727, now seen corresponding path program 1 times [2023-12-21 04:55:58,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:55:58,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543177313] [2023-12-21 04:55:58,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:55:58,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:55:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:55:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:55:58,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:55:58,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543177313] [2023-12-21 04:55:58,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543177313] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 04:55:58,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 04:55:58,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 04:55:58,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076188437] [2023-12-21 04:55:58,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:55:58,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 04:55:58,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:55:58,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 04:55:58,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 04:55:58,689 INFO L87 Difference]: Start difference. First operand 17 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:58,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:55:58,728 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2023-12-21 04:55:58,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 04:55:58,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-21 04:55:58,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:55:58,729 INFO L225 Difference]: With dead ends: 40 [2023-12-21 04:55:58,729 INFO L226 Difference]: Without dead ends: 27 [2023-12-21 04:55:58,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 04:55:58,731 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:55:58,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 17 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:55:58,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-21 04:55:58,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-12-21 04:55:58,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 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) [2023-12-21 04:55:58,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 40 transitions. [2023-12-21 04:55:58,741 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 40 transitions. Word has length 12 [2023-12-21 04:55:58,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:55:58,741 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 40 transitions. [2023-12-21 04:55:58,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:58,742 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 40 transitions. [2023-12-21 04:55:58,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-21 04:55:58,742 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:55:58,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:55:58,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-21 04:55:58,743 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:55:58,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:55:58,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1110398198, now seen corresponding path program 1 times [2023-12-21 04:55:58,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:55:58,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047974619] [2023-12-21 04:55:58,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:55:58,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:55:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:55:58,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:55:58,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:55:58,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047974619] [2023-12-21 04:55:58,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047974619] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 04:55:58,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 04:55:58,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 04:55:58,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367915175] [2023-12-21 04:55:58,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:55:58,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 04:55:58,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:55:58,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 04:55:58,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 04:55:58,792 INFO L87 Difference]: Start difference. First operand 27 states and 40 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:58,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:55:58,831 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2023-12-21 04:55:58,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 04:55:58,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-21 04:55:58,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:55:58,832 INFO L225 Difference]: With dead ends: 42 [2023-12-21 04:55:58,833 INFO L226 Difference]: Without dead ends: 31 [2023-12-21 04:55:58,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 04:55:58,834 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:55:58,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 19 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:55:58,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-21 04:55:58,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-12-21 04:55:58,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.5) internal successors, (45), 30 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:58,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2023-12-21 04:55:58,854 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 12 [2023-12-21 04:55:58,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:55:58,855 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2023-12-21 04:55:58,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:58,855 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2023-12-21 04:55:58,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-21 04:55:58,855 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:55:58,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:55:58,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-21 04:55:58,856 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:55:58,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:55:58,856 INFO L85 PathProgramCache]: Analyzing trace with hash 141528505, now seen corresponding path program 1 times [2023-12-21 04:55:58,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:55:58,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033989402] [2023-12-21 04:55:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:55:58,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:55:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:55:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 04:55:58,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:55:58,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033989402] [2023-12-21 04:55:58,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033989402] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 04:55:58,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 04:55:58,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 04:55:58,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106476500] [2023-12-21 04:55:58,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:55:58,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 04:55:58,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:55:58,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 04:55:58,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 04:55:58,988 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:59,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:55:59,052 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2023-12-21 04:55:59,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 04:55:59,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-21 04:55:59,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:55:59,054 INFO L225 Difference]: With dead ends: 40 [2023-12-21 04:55:59,055 INFO L226 Difference]: Without dead ends: 27 [2023-12-21 04:55:59,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-21 04:55:59,056 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:55:59,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 32 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:55:59,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-21 04:55:59,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-12-21 04:55:59,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:59,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2023-12-21 04:55:59,064 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 14 [2023-12-21 04:55:59,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:55:59,064 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2023-12-21 04:55:59,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:59,065 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2023-12-21 04:55:59,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-21 04:55:59,065 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:55:59,065 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:55:59,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-21 04:55:59,066 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:55:59,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:55:59,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1611499544, now seen corresponding path program 1 times [2023-12-21 04:55:59,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:55:59,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820785264] [2023-12-21 04:55:59,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:55:59,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:55:59,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:55:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 04:55:59,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:55:59,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820785264] [2023-12-21 04:55:59,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820785264] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:55:59,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190407551] [2023-12-21 04:55:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:55:59,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:55:59,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:55:59,216 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) [2023-12-21 04:55:59,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 04:55:59,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:55:59,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-21 04:55:59,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:55:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 04:55:59,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:55:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 04:55:59,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190407551] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 04:55:59,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-21 04:55:59,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-12-21 04:55:59,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899536546] [2023-12-21 04:55:59,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:55:59,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 04:55:59,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:55:59,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 04:55:59,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-12-21 04:55:59,387 INFO L87 Difference]: Start difference. First operand 27 states and 39 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:59,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:55:59,443 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2023-12-21 04:55:59,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 04:55:59,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-21 04:55:59,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:55:59,445 INFO L225 Difference]: With dead ends: 34 [2023-12-21 04:55:59,445 INFO L226 Difference]: Without dead ends: 24 [2023-12-21 04:55:59,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-12-21 04:55:59,447 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:55:59,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 21 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:55:59,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-21 04:55:59,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-21 04:55:59,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:59,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2023-12-21 04:55:59,457 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 14 [2023-12-21 04:55:59,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:55:59,458 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2023-12-21 04:55:59,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:59,458 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2023-12-21 04:55:59,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-21 04:55:59,458 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:55:59,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:55:59,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-21 04:55:59,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-21 04:55:59,659 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:55:59,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:55:59,660 INFO L85 PathProgramCache]: Analyzing trace with hash -2082676004, now seen corresponding path program 1 times [2023-12-21 04:55:59,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:55:59,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47589827] [2023-12-21 04:55:59,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:55:59,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:55:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:55:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 04:55:59,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:55:59,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47589827] [2023-12-21 04:55:59,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47589827] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:55:59,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624619092] [2023-12-21 04:55:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:55:59,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:55:59,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:55:59,747 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) [2023-12-21 04:55:59,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 04:55:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:55:59,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-21 04:55:59,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:55:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:55:59,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:55:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 04:55:59,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624619092] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:55:59,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:55:59,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 10 [2023-12-21 04:55:59,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141807080] [2023-12-21 04:55:59,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:55:59,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-21 04:55:59,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:55:59,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-21 04:55:59,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-12-21 04:55:59,885 INFO L87 Difference]: Start difference. First operand 24 states and 34 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) [2023-12-21 04:56:00,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:56:00,058 INFO L93 Difference]: Finished difference Result 102 states and 153 transitions. [2023-12-21 04:56:00,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-21 04:56:00,058 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 15 [2023-12-21 04:56:00,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:56:00,063 INFO L225 Difference]: With dead ends: 102 [2023-12-21 04:56:00,063 INFO L226 Difference]: Without dead ends: 85 [2023-12-21 04:56:00,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-12-21 04:56:00,066 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 04:56:00,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 73 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 04:56:00,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-21 04:56:00,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 52. [2023-12-21 04:56:00,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 51 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) [2023-12-21 04:56:00,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 78 transitions. [2023-12-21 04:56:00,095 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 78 transitions. Word has length 15 [2023-12-21 04:56:00,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:56:00,095 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 78 transitions. [2023-12-21 04:56:00,095 INFO L496 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) [2023-12-21 04:56:00,096 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 78 transitions. [2023-12-21 04:56:00,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-21 04:56:00,097 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:56:00,097 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:56:00,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-21 04:56:00,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-21 04:56:00,303 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:56:00,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:56:00,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1755904316, now seen corresponding path program 1 times [2023-12-21 04:56:00,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:56:00,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075507449] [2023-12-21 04:56:00,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:00,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:56:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:00,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 04:56:00,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:56:00,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075507449] [2023-12-21 04:56:00,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075507449] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:56:00,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630051703] [2023-12-21 04:56:00,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:00,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:00,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:56:00,398 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) [2023-12-21 04:56:00,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-21 04:56:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:00,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 04:56:00,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:56:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 04:56:00,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:56:00,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 04:56:00,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630051703] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:56:00,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:56:00,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-12-21 04:56:00,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993013326] [2023-12-21 04:56:00,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:56:00,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 04:56:00,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:56:00,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 04:56:00,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 04:56:00,530 INFO L87 Difference]: Start difference. First operand 52 states and 78 transitions. 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) [2023-12-21 04:56:00,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:56:00,601 INFO L93 Difference]: Finished difference Result 100 states and 143 transitions. [2023-12-21 04:56:00,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 04:56:00,601 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 [2023-12-21 04:56:00,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:56:00,602 INFO L225 Difference]: With dead ends: 100 [2023-12-21 04:56:00,602 INFO L226 Difference]: Without dead ends: 93 [2023-12-21 04:56:00,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 04:56:00,605 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:56:00,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 38 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:56:00,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-12-21 04:56:00,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 64. [2023-12-21 04:56:00,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.507936507936508) internal successors, (95), 63 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:00,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 95 transitions. [2023-12-21 04:56:00,639 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 95 transitions. Word has length 15 [2023-12-21 04:56:00,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:56:00,639 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 95 transitions. [2023-12-21 04:56:00,639 INFO L496 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) [2023-12-21 04:56:00,640 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 95 transitions. [2023-12-21 04:56:00,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-21 04:56:00,643 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:56:00,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:56:00,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-21 04:56:00,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:00,851 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:56:00,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:56:00,852 INFO L85 PathProgramCache]: Analyzing trace with hash -861868215, now seen corresponding path program 1 times [2023-12-21 04:56:00,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:56:00,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265700692] [2023-12-21 04:56:00,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:00,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:56:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 04:56:00,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:56:00,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265700692] [2023-12-21 04:56:00,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265700692] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:56:00,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709995218] [2023-12-21 04:56:00,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:00,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:00,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:56:00,950 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) [2023-12-21 04:56:00,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-21 04:56:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:00,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-21 04:56:00,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:56:01,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 04:56:01,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:56:01,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 04:56:01,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709995218] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:56:01,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:56:01,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-12-21 04:56:01,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664795583] [2023-12-21 04:56:01,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:56:01,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-21 04:56:01,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:56:01,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-21 04:56:01,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-21 04:56:01,133 INFO L87 Difference]: Start difference. First operand 64 states and 95 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:01,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:56:01,312 INFO L93 Difference]: Finished difference Result 140 states and 209 transitions. [2023-12-21 04:56:01,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-21 04:56:01,313 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-21 04:56:01,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:56:01,313 INFO L225 Difference]: With dead ends: 140 [2023-12-21 04:56:01,313 INFO L226 Difference]: Without dead ends: 111 [2023-12-21 04:56:01,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-12-21 04:56:01,316 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 04:56:01,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 73 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 04:56:01,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-12-21 04:56:01,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 89. [2023-12-21 04:56:01,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.4431818181818181) internal successors, (127), 88 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) [2023-12-21 04:56:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 127 transitions. [2023-12-21 04:56:01,355 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 127 transitions. Word has length 16 [2023-12-21 04:56:01,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:56:01,355 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 127 transitions. [2023-12-21 04:56:01,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:01,355 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 127 transitions. [2023-12-21 04:56:01,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-21 04:56:01,356 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:56:01,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:56:01,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-21 04:56:01,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:01,562 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:56:01,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:56:01,562 INFO L85 PathProgramCache]: Analyzing trace with hash 456382938, now seen corresponding path program 1 times [2023-12-21 04:56:01,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:56:01,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635160228] [2023-12-21 04:56:01,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:01,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:56:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:01,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 04:56:01,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:56:01,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635160228] [2023-12-21 04:56:01,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635160228] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:56:01,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681232416] [2023-12-21 04:56:01,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:01,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:01,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:56:01,726 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) [2023-12-21 04:56:01,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-21 04:56:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:01,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-21 04:56:01,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:56:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 04:56:01,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:56:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 04:56:01,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681232416] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:56:01,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:56:01,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-12-21 04:56:01,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786623127] [2023-12-21 04:56:01,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:56:01,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 04:56:01,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:56:01,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 04:56:01,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-21 04:56:01,837 INFO L87 Difference]: Start difference. First operand 89 states and 127 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:01,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:56:01,926 INFO L93 Difference]: Finished difference Result 142 states and 206 transitions. [2023-12-21 04:56:01,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 04:56:01,927 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-21 04:56:01,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:56:01,928 INFO L225 Difference]: With dead ends: 142 [2023-12-21 04:56:01,928 INFO L226 Difference]: Without dead ends: 94 [2023-12-21 04:56:01,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-21 04:56:01,929 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:56:01,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 56 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:56:01,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-12-21 04:56:01,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2023-12-21 04:56:01,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.4794520547945205) internal successors, (108), 73 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) [2023-12-21 04:56:01,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 108 transitions. [2023-12-21 04:56:01,961 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 108 transitions. Word has length 17 [2023-12-21 04:56:01,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:56:01,961 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 108 transitions. [2023-12-21 04:56:01,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:01,961 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 108 transitions. [2023-12-21 04:56:01,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-21 04:56:01,963 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:56:01,963 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:56:01,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-21 04:56:02,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-21 04:56:02,170 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:56:02,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:56:02,170 INFO L85 PathProgramCache]: Analyzing trace with hash -192617351, now seen corresponding path program 2 times [2023-12-21 04:56:02,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:56:02,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570837814] [2023-12-21 04:56:02,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:02,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:56:02,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 04:56:02,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:56:02,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570837814] [2023-12-21 04:56:02,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570837814] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:56:02,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167014522] [2023-12-21 04:56:02,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:56:02,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:02,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:56:02,249 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) [2023-12-21 04:56:02,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-21 04:56:02,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:56:02,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:56:02,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-21 04:56:02,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:56:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 04:56:02,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:56:02,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 04:56:02,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167014522] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:56:02,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:56:02,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-12-21 04:56:02,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931542889] [2023-12-21 04:56:02,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:56:02,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-21 04:56:02,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:56:02,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-21 04:56:02,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-12-21 04:56:02,373 INFO L87 Difference]: Start difference. First operand 74 states and 108 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:02,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:56:02,537 INFO L93 Difference]: Finished difference Result 137 states and 197 transitions. [2023-12-21 04:56:02,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-21 04:56:02,538 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-21 04:56:02,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:56:02,538 INFO L225 Difference]: With dead ends: 137 [2023-12-21 04:56:02,539 INFO L226 Difference]: Without dead ends: 93 [2023-12-21 04:56:02,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-12-21 04:56:02,540 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 57 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 04:56:02,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 66 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 04:56:02,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-12-21 04:56:02,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 69. [2023-12-21 04:56:02,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.5) internal successors, (102), 68 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) [2023-12-21 04:56:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 102 transitions. [2023-12-21 04:56:02,569 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 102 transitions. Word has length 18 [2023-12-21 04:56:02,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:56:02,569 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 102 transitions. [2023-12-21 04:56:02,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:02,569 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 102 transitions. [2023-12-21 04:56:02,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-21 04:56:02,570 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:56:02,570 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:56:02,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-21 04:56:02,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:02,776 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:56:02,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:56:02,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1494692298, now seen corresponding path program 2 times [2023-12-21 04:56:02,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:56:02,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305056412] [2023-12-21 04:56:02,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:02,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:56:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:56:02,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:56:02,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305056412] [2023-12-21 04:56:02,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305056412] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:56:02,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216387580] [2023-12-21 04:56:02,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:56:02,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:02,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:56:02,902 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) [2023-12-21 04:56:02,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-21 04:56:02,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:56:02,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:56:02,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-21 04:56:02,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:56:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 04:56:03,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:56:03,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 04:56:03,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216387580] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:56:03,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:56:03,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2023-12-21 04:56:03,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152457834] [2023-12-21 04:56:03,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:56:03,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-21 04:56:03,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:56:03,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-21 04:56:03,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-12-21 04:56:03,073 INFO L87 Difference]: Start difference. First operand 69 states and 102 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:03,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:56:03,623 INFO L93 Difference]: Finished difference Result 185 states and 254 transitions. [2023-12-21 04:56:03,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-21 04:56:03,624 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-21 04:56:03,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:56:03,625 INFO L225 Difference]: With dead ends: 185 [2023-12-21 04:56:03,625 INFO L226 Difference]: Without dead ends: 151 [2023-12-21 04:56:03,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2023-12-21 04:56:03,626 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 97 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 04:56:03,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 143 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 04:56:03,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-12-21 04:56:03,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 88. [2023-12-21 04:56:03,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.367816091954023) internal successors, (119), 87 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) [2023-12-21 04:56:03,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 119 transitions. [2023-12-21 04:56:03,663 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 119 transitions. Word has length 18 [2023-12-21 04:56:03,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:56:03,664 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 119 transitions. [2023-12-21 04:56:03,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:03,664 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 119 transitions. [2023-12-21 04:56:03,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-21 04:56:03,664 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:56:03,664 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:56:03,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-21 04:56:03,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:03,870 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:56:03,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:56:03,871 INFO L85 PathProgramCache]: Analyzing trace with hash -766299848, now seen corresponding path program 3 times [2023-12-21 04:56:03,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:56:03,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611891281] [2023-12-21 04:56:03,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:03,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:56:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 04:56:03,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:56:03,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611891281] [2023-12-21 04:56:03,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611891281] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:56:03,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596491903] [2023-12-21 04:56:03,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 04:56:03,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:03,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:56:03,983 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) [2023-12-21 04:56:04,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-21 04:56:04,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-21 04:56:04,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:56:04,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-21 04:56:04,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:56:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 04:56:04,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:56:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 04:56:04,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596491903] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:56:04,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:56:04,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 14 [2023-12-21 04:56:04,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101672113] [2023-12-21 04:56:04,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:56:04,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-21 04:56:04,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:56:04,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-21 04:56:04,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-12-21 04:56:04,214 INFO L87 Difference]: Start difference. First operand 88 states and 119 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:04,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:56:04,797 INFO L93 Difference]: Finished difference Result 207 states and 291 transitions. [2023-12-21 04:56:04,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-21 04:56:04,798 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-21 04:56:04,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:56:04,798 INFO L225 Difference]: With dead ends: 207 [2023-12-21 04:56:04,798 INFO L226 Difference]: Without dead ends: 140 [2023-12-21 04:56:04,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2023-12-21 04:56:04,800 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 87 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 04:56:04,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 180 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 04:56:04,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-12-21 04:56:04,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 84. [2023-12-21 04:56:04,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.4457831325301205) internal successors, (120), 83 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) [2023-12-21 04:56:04,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 120 transitions. [2023-12-21 04:56:04,830 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 120 transitions. Word has length 20 [2023-12-21 04:56:04,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:56:04,830 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 120 transitions. [2023-12-21 04:56:04,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:04,830 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 120 transitions. [2023-12-21 04:56:04,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-21 04:56:04,830 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:56:04,830 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:56:04,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-21 04:56:05,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-21 04:56:05,036 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:56:05,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:56:05,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1430181380, now seen corresponding path program 3 times [2023-12-21 04:56:05,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:56:05,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402820245] [2023-12-21 04:56:05,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:05,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:56:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:56:05,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:56:05,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402820245] [2023-12-21 04:56:05,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402820245] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:56:05,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698470707] [2023-12-21 04:56:05,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 04:56:05,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:05,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:56:05,170 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) [2023-12-21 04:56:05,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-21 04:56:05,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-21 04:56:05,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:56:05,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-21 04:56:05,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:56:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 04:56:05,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:56:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 04:56:05,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698470707] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:56:05,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:56:05,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2023-12-21 04:56:05,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853381284] [2023-12-21 04:56:05,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:56:05,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-21 04:56:05,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:56:05,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-21 04:56:05,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-12-21 04:56:05,375 INFO L87 Difference]: Start difference. First operand 84 states and 120 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:06,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:56:06,452 INFO L93 Difference]: Finished difference Result 241 states and 316 transitions. [2023-12-21 04:56:06,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-21 04:56:06,453 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-12-21 04:56:06,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:56:06,453 INFO L225 Difference]: With dead ends: 241 [2023-12-21 04:56:06,453 INFO L226 Difference]: Without dead ends: 205 [2023-12-21 04:56:06,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=310, Invalid=2446, Unknown=0, NotChecked=0, Total=2756 [2023-12-21 04:56:06,455 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 164 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 04:56:06,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 210 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 04:56:06,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-12-21 04:56:06,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 105. [2023-12-21 04:56:06,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.3461538461538463) internal successors, (140), 104 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) [2023-12-21 04:56:06,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 140 transitions. [2023-12-21 04:56:06,513 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 140 transitions. Word has length 21 [2023-12-21 04:56:06,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:56:06,513 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 140 transitions. [2023-12-21 04:56:06,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:06,513 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 140 transitions. [2023-12-21 04:56:06,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-21 04:56:06,514 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:56:06,514 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:56:06,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-21 04:56:06,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-21 04:56:06,714 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:56:06,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:56:06,715 INFO L85 PathProgramCache]: Analyzing trace with hash 595417785, now seen corresponding path program 4 times [2023-12-21 04:56:06,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:56:06,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083416688] [2023-12-21 04:56:06,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:06,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:56:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 04:56:06,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:56:06,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083416688] [2023-12-21 04:56:06,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083416688] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:56:06,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075990085] [2023-12-21 04:56:06,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 04:56:06,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:06,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:56:06,833 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) [2023-12-21 04:56:06,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-21 04:56:06,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 04:56:06,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:56:06,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-21 04:56:06,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:56:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 04:56:06,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:56:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-21 04:56:07,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075990085] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:56:07,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:56:07,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 7] total 18 [2023-12-21 04:56:07,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504439412] [2023-12-21 04:56:07,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:56:07,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-21 04:56:07,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:56:07,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-21 04:56:07,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-12-21 04:56:07,034 INFO L87 Difference]: Start difference. First operand 105 states and 140 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:07,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:56:07,780 INFO L93 Difference]: Finished difference Result 203 states and 297 transitions. [2023-12-21 04:56:07,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-21 04:56:07,780 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-21 04:56:07,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:56:07,781 INFO L225 Difference]: With dead ends: 203 [2023-12-21 04:56:07,781 INFO L226 Difference]: Without dead ends: 167 [2023-12-21 04:56:07,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=322, Invalid=1318, Unknown=0, NotChecked=0, Total=1640 [2023-12-21 04:56:07,785 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 78 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 04:56:07,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 136 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 04:56:07,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-12-21 04:56:07,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 124. [2023-12-21 04:56:07,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.3902439024390243) internal successors, (171), 123 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:07,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 171 transitions. [2023-12-21 04:56:07,849 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 171 transitions. Word has length 22 [2023-12-21 04:56:07,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:56:07,850 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 171 transitions. [2023-12-21 04:56:07,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:07,850 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 171 transitions. [2023-12-21 04:56:07,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-21 04:56:07,850 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:56:07,850 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:56:07,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-21 04:56:08,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-21 04:56:08,056 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:56:08,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:56:08,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1904897495, now seen corresponding path program 2 times [2023-12-21 04:56:08,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:56:08,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506066316] [2023-12-21 04:56:08,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:08,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:56:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:08,155 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 04:56:08,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:56:08,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506066316] [2023-12-21 04:56:08,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506066316] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:56:08,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249007002] [2023-12-21 04:56:08,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:56:08,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:08,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:56:08,157 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) [2023-12-21 04:56:08,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-21 04:56:08,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:56:08,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:56:08,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-21 04:56:08,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:56:08,264 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:56:08,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:56:08,352 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 04:56:08,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249007002] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:56:08,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:56:08,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 18 [2023-12-21 04:56:08,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257541941] [2023-12-21 04:56:08,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:56:08,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-21 04:56:08,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:56:08,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-21 04:56:08,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-12-21 04:56:08,354 INFO L87 Difference]: Start difference. First operand 124 states and 171 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2023-12-21 04:56:08,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:56:08,695 INFO L93 Difference]: Finished difference Result 312 states and 467 transitions. [2023-12-21 04:56:08,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-21 04:56:08,696 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 22 [2023-12-21 04:56:08,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:56:08,697 INFO L225 Difference]: With dead ends: 312 [2023-12-21 04:56:08,697 INFO L226 Difference]: Without dead ends: 255 [2023-12-21 04:56:08,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2023-12-21 04:56:08,698 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 106 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 04:56:08,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 184 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 04:56:08,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2023-12-21 04:56:08,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 175. [2023-12-21 04:56:08,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.367816091954023) internal successors, (238), 174 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 238 transitions. [2023-12-21 04:56:08,763 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 238 transitions. Word has length 22 [2023-12-21 04:56:08,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:56:08,763 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 238 transitions. [2023-12-21 04:56:08,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2023-12-21 04:56:08,763 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 238 transitions. [2023-12-21 04:56:08,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-21 04:56:08,763 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:56:08,764 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:56:08,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-21 04:56:08,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-21 04:56:08,969 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:56:08,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:56:08,970 INFO L85 PathProgramCache]: Analyzing trace with hash 484083850, now seen corresponding path program 4 times [2023-12-21 04:56:08,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:56:08,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893438978] [2023-12-21 04:56:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:08,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:56:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:56:09,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:56:09,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893438978] [2023-12-21 04:56:09,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893438978] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:56:09,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265985291] [2023-12-21 04:56:09,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 04:56:09,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:09,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:56:09,148 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) [2023-12-21 04:56:09,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-21 04:56:09,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 04:56:09,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:56:09,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-21 04:56:09,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:56:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-21 04:56:09,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:56:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-21 04:56:09,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265985291] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:56:09,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:56:09,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2023-12-21 04:56:09,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350109557] [2023-12-21 04:56:09,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:56:09,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-21 04:56:09,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:56:09,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-21 04:56:09,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2023-12-21 04:56:09,415 INFO L87 Difference]: Start difference. First operand 175 states and 238 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:12,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:56:12,366 INFO L93 Difference]: Finished difference Result 599 states and 785 transitions. [2023-12-21 04:56:12,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-12-21 04:56:12,367 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-21 04:56:12,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:56:12,371 INFO L225 Difference]: With dead ends: 599 [2023-12-21 04:56:12,371 INFO L226 Difference]: Without dead ends: 543 [2023-12-21 04:56:12,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4542 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1023, Invalid=11859, Unknown=0, NotChecked=0, Total=12882 [2023-12-21 04:56:12,377 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 392 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-21 04:56:12,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 224 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-21 04:56:12,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2023-12-21 04:56:12,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 199. [2023-12-21 04:56:12,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.3686868686868687) internal successors, (271), 198 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:12,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 271 transitions. [2023-12-21 04:56:12,446 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 271 transitions. Word has length 24 [2023-12-21 04:56:12,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:56:12,446 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 271 transitions. [2023-12-21 04:56:12,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:12,446 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 271 transitions. [2023-12-21 04:56:12,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-21 04:56:12,446 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:56:12,447 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:56:12,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-21 04:56:12,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-21 04:56:12,648 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:56:12,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:56:12,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1163911478, now seen corresponding path program 1 times [2023-12-21 04:56:12,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:56:12,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720052060] [2023-12-21 04:56:12,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:12,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:56:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 04:56:12,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:56:12,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720052060] [2023-12-21 04:56:12,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720052060] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:56:12,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155161362] [2023-12-21 04:56:12,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:12,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:12,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:56:12,785 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) [2023-12-21 04:56:12,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-21 04:56:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:12,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-21 04:56:12,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:56:12,914 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 04:56:12,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:56:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-21 04:56:13,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155161362] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:56:13,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:56:13,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 8] total 22 [2023-12-21 04:56:13,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128936649] [2023-12-21 04:56:13,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:56:13,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-21 04:56:13,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:56:13,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-21 04:56:13,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2023-12-21 04:56:13,028 INFO L87 Difference]: Start difference. First operand 199 states and 271 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2023-12-21 04:56:14,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:56:14,078 INFO L93 Difference]: Finished difference Result 389 states and 565 transitions. [2023-12-21 04:56:14,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-12-21 04:56:14,079 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-21 04:56:14,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:56:14,080 INFO L225 Difference]: With dead ends: 389 [2023-12-21 04:56:14,080 INFO L226 Difference]: Without dead ends: 297 [2023-12-21 04:56:14,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=535, Invalid=3125, Unknown=0, NotChecked=0, Total=3660 [2023-12-21 04:56:14,082 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 112 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 04:56:14,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 298 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 04:56:14,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-12-21 04:56:14,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 211. [2023-12-21 04:56:14,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.3666666666666667) internal successors, (287), 210 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:14,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 287 transitions. [2023-12-21 04:56:14,151 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 287 transitions. Word has length 24 [2023-12-21 04:56:14,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:56:14,151 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 287 transitions. [2023-12-21 04:56:14,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2023-12-21 04:56:14,152 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 287 transitions. [2023-12-21 04:56:14,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-21 04:56:14,152 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:56:14,152 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:56:14,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-21 04:56:14,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-21 04:56:14,353 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:56:14,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:56:14,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1181574022, now seen corresponding path program 3 times [2023-12-21 04:56:14,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:56:14,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944399324] [2023-12-21 04:56:14,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:14,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:56:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-21 04:56:14,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:56:14,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944399324] [2023-12-21 04:56:14,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944399324] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:56:14,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022026923] [2023-12-21 04:56:14,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 04:56:14,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:14,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:56:14,515 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) [2023-12-21 04:56:14,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-21 04:56:14,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-21 04:56:14,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:56:14,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-21 04:56:14,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:56:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-21 04:56:14,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:56:14,668 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-21 04:56:14,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022026923] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:56:14,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:56:14,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 12 [2023-12-21 04:56:14,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447929262] [2023-12-21 04:56:14,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:56:14,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-21 04:56:14,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:56:14,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-21 04:56:14,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-21 04:56:14,671 INFO L87 Difference]: Start difference. First operand 211 states and 287 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:15,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:56:15,101 INFO L93 Difference]: Finished difference Result 425 states and 556 transitions. [2023-12-21 04:56:15,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-21 04:56:15,101 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-21 04:56:15,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:56:15,103 INFO L225 Difference]: With dead ends: 425 [2023-12-21 04:56:15,103 INFO L226 Difference]: Without dead ends: 395 [2023-12-21 04:56:15,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-12-21 04:56:15,104 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 88 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 04:56:15,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 118 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 04:56:15,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2023-12-21 04:56:15,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 215. [2023-12-21 04:56:15,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.355140186915888) internal successors, (290), 214 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:15,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 290 transitions. [2023-12-21 04:56:15,225 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 290 transitions. Word has length 25 [2023-12-21 04:56:15,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:56:15,225 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 290 transitions. [2023-12-21 04:56:15,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:15,225 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 290 transitions. [2023-12-21 04:56:15,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-21 04:56:15,226 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:56:15,226 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:56:15,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-21 04:56:15,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:15,437 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:56:15,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:56:15,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1277900104, now seen corresponding path program 2 times [2023-12-21 04:56:15,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:56:15,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433005187] [2023-12-21 04:56:15,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:15,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:56:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 04:56:15,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:56:15,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433005187] [2023-12-21 04:56:15,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433005187] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:56:15,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389531347] [2023-12-21 04:56:15,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:56:15,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:15,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:56:15,612 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) [2023-12-21 04:56:15,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-21 04:56:15,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:56:15,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:56:15,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-21 04:56:15,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:56:15,694 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 04:56:15,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:56:15,768 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-21 04:56:15,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389531347] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:56:15,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:56:15,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 6] total 18 [2023-12-21 04:56:15,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626640569] [2023-12-21 04:56:15,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:56:15,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-21 04:56:15,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:56:15,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-21 04:56:15,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-12-21 04:56:15,770 INFO L87 Difference]: Start difference. First operand 215 states and 290 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:16,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:56:16,357 INFO L93 Difference]: Finished difference Result 475 states and 692 transitions. [2023-12-21 04:56:16,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-21 04:56:16,357 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-21 04:56:16,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:56:16,359 INFO L225 Difference]: With dead ends: 475 [2023-12-21 04:56:16,359 INFO L226 Difference]: Without dead ends: 424 [2023-12-21 04:56:16,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2023-12-21 04:56:16,360 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 148 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 04:56:16,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 371 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 04:56:16,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-12-21 04:56:16,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 247. [2023-12-21 04:56:16,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.3373983739837398) internal successors, (329), 246 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:16,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 329 transitions. [2023-12-21 04:56:16,491 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 329 transitions. Word has length 26 [2023-12-21 04:56:16,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:56:16,491 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 329 transitions. [2023-12-21 04:56:16,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:16,491 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 329 transitions. [2023-12-21 04:56:16,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-21 04:56:16,492 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:56:16,493 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:56:16,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-21 04:56:16,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:16,699 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:56:16,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:56:16,700 INFO L85 PathProgramCache]: Analyzing trace with hash 128502460, now seen corresponding path program 5 times [2023-12-21 04:56:16,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:56:16,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914510992] [2023-12-21 04:56:16,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:16,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:56:16,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:56:16,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:56:16,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914510992] [2023-12-21 04:56:16,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914510992] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:56:16,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312461442] [2023-12-21 04:56:16,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 04:56:16,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:16,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:56:16,923 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) [2023-12-21 04:56:16,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-21 04:56:17,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-21 04:56:17,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:56:17,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-21 04:56:17,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:56:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:56:17,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:56:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-21 04:56:17,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312461442] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:56:17,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:56:17,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 8] total 27 [2023-12-21 04:56:17,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629851763] [2023-12-21 04:56:17,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:56:17,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-21 04:56:17,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:56:17,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-21 04:56:17,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2023-12-21 04:56:17,338 INFO L87 Difference]: Start difference. First operand 247 states and 329 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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) [2023-12-21 04:56:18,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:56:18,867 INFO L93 Difference]: Finished difference Result 524 states and 779 transitions. [2023-12-21 04:56:18,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-12-21 04:56:18,868 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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 27 [2023-12-21 04:56:18,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:56:18,870 INFO L225 Difference]: With dead ends: 524 [2023-12-21 04:56:18,870 INFO L226 Difference]: Without dead ends: 457 [2023-12-21 04:56:18,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=859, Invalid=3563, Unknown=0, NotChecked=0, Total=4422 [2023-12-21 04:56:18,872 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 263 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 1315 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 1468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 04:56:18,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 312 Invalid, 1468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1315 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 04:56:18,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2023-12-21 04:56:19,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 311. [2023-12-21 04:56:19,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.3580645161290323) internal successors, (421), 310 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:19,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 421 transitions. [2023-12-21 04:56:19,018 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 421 transitions. Word has length 27 [2023-12-21 04:56:19,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:56:19,018 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 421 transitions. [2023-12-21 04:56:19,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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) [2023-12-21 04:56:19,018 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 421 transitions. [2023-12-21 04:56:19,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-21 04:56:19,019 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:56:19,019 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:56:19,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-21 04:56:19,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:19,225 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:56:19,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:56:19,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1982508647, now seen corresponding path program 4 times [2023-12-21 04:56:19,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:56:19,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598014744] [2023-12-21 04:56:19,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:19,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:56:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-21 04:56:19,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:56:19,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598014744] [2023-12-21 04:56:19,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598014744] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:56:19,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252164331] [2023-12-21 04:56:19,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 04:56:19,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:19,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:56:19,390 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) [2023-12-21 04:56:19,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-21 04:56:19,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 04:56:19,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:56:19,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-21 04:56:19,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:56:19,497 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 04:56:19,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:56:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-21 04:56:19,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252164331] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:56:19,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:56:19,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 7] total 21 [2023-12-21 04:56:19,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169643113] [2023-12-21 04:56:19,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:56:19,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-21 04:56:19,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:56:19,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-21 04:56:19,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2023-12-21 04:56:19,601 INFO L87 Difference]: Start difference. First operand 311 states and 421 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 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) [2023-12-21 04:56:20,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:56:20,319 INFO L93 Difference]: Finished difference Result 615 states and 903 transitions. [2023-12-21 04:56:20,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-21 04:56:20,320 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 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 28 [2023-12-21 04:56:20,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:56:20,322 INFO L225 Difference]: With dead ends: 615 [2023-12-21 04:56:20,322 INFO L226 Difference]: Without dead ends: 533 [2023-12-21 04:56:20,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2023-12-21 04:56:20,323 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 162 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 04:56:20,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 425 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 04:56:20,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2023-12-21 04:56:20,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 346. [2023-12-21 04:56:20,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 1.3652173913043477) internal successors, (471), 345 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:20,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 471 transitions. [2023-12-21 04:56:20,487 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 471 transitions. Word has length 28 [2023-12-21 04:56:20,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:56:20,487 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 471 transitions. [2023-12-21 04:56:20,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 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) [2023-12-21 04:56:20,487 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 471 transitions. [2023-12-21 04:56:20,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-21 04:56:20,488 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:56:20,488 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:56:20,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-21 04:56:20,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:20,689 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:56:20,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:56:20,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1866772422, now seen corresponding path program 5 times [2023-12-21 04:56:20,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:56:20,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025674701] [2023-12-21 04:56:20,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:20,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:56:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 04:56:20,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:56:20,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025674701] [2023-12-21 04:56:20,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025674701] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:56:20,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638829426] [2023-12-21 04:56:20,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 04:56:20,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:20,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:56:20,884 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) [2023-12-21 04:56:20,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-21 04:56:20,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-21 04:56:20,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:56:20,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-21 04:56:20,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:56:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 04:56:21,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:56:21,161 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 04:56:21,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638829426] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:56:21,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:56:21,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2023-12-21 04:56:21,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308016109] [2023-12-21 04:56:21,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:56:21,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 04:56:21,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:56:21,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 04:56:21,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-21 04:56:21,162 INFO L87 Difference]: Start difference. First operand 346 states and 471 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:21,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:56:21,670 INFO L93 Difference]: Finished difference Result 572 states and 769 transitions. [2023-12-21 04:56:21,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-21 04:56:21,671 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-21 04:56:21,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:56:21,672 INFO L225 Difference]: With dead ends: 572 [2023-12-21 04:56:21,672 INFO L226 Difference]: Without dead ends: 457 [2023-12-21 04:56:21,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 20 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-21 04:56:21,673 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 04:56:21,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 109 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 04:56:21,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2023-12-21 04:56:21,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 339. [2023-12-21 04:56:21,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.363905325443787) internal successors, (461), 338 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:21,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 461 transitions. [2023-12-21 04:56:21,844 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 461 transitions. Word has length 29 [2023-12-21 04:56:21,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:56:21,844 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 461 transitions. [2023-12-21 04:56:21,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:21,844 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 461 transitions. [2023-12-21 04:56:21,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-21 04:56:21,844 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:56:21,845 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:56:21,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-21 04:56:22,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:22,045 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:56:22,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:56:22,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1906606068, now seen corresponding path program 6 times [2023-12-21 04:56:22,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:56:22,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861145097] [2023-12-21 04:56:22,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:22,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:56:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:22,227 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-21 04:56:22,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:56:22,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861145097] [2023-12-21 04:56:22,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861145097] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:56:22,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346592857] [2023-12-21 04:56:22,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 04:56:22,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:22,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:56:22,228 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) [2023-12-21 04:56:22,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-21 04:56:22,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-21 04:56:22,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:56:22,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-21 04:56:22,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:56:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-21 04:56:22,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:56:22,608 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-21 04:56:22,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346592857] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:56:22,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:56:22,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 21 [2023-12-21 04:56:22,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453253398] [2023-12-21 04:56:22,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:56:22,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-21 04:56:22,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:56:22,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-21 04:56:22,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2023-12-21 04:56:22,609 INFO L87 Difference]: Start difference. First operand 339 states and 461 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2023-12-21 04:56:28,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:56:28,797 INFO L93 Difference]: Finished difference Result 1056 states and 1333 transitions. [2023-12-21 04:56:28,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2023-12-21 04:56:28,797 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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 29 [2023-12-21 04:56:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:56:28,800 INFO L225 Difference]: With dead ends: 1056 [2023-12-21 04:56:28,800 INFO L226 Difference]: Without dead ends: 971 [2023-12-21 04:56:28,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 49 SyntacticMatches, 10 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9410 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1822, Invalid=22984, Unknown=0, NotChecked=0, Total=24806 [2023-12-21 04:56:28,805 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 411 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-21 04:56:28,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 401 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-21 04:56:28,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2023-12-21 04:56:28,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 357. [2023-12-21 04:56:28,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.3651685393258426) internal successors, (486), 356 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:28,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 486 transitions. [2023-12-21 04:56:28,991 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 486 transitions. Word has length 29 [2023-12-21 04:56:28,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:56:28,992 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 486 transitions. [2023-12-21 04:56:28,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2023-12-21 04:56:28,992 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 486 transitions. [2023-12-21 04:56:28,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-21 04:56:28,992 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:56:28,992 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:56:28,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-21 04:56:29,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:29,198 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:56:29,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:56:29,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1963634506, now seen corresponding path program 7 times [2023-12-21 04:56:29,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:56:29,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41045501] [2023-12-21 04:56:29,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:29,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:56:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:56:29,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:56:29,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41045501] [2023-12-21 04:56:29,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41045501] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:56:29,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61674085] [2023-12-21 04:56:29,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 04:56:29,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:29,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:56:29,447 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) [2023-12-21 04:56:29,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-21 04:56:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:29,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-21 04:56:29,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:56:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-21 04:56:29,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:56:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-21 04:56:29,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61674085] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:56:29,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:56:29,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 24 [2023-12-21 04:56:29,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888402402] [2023-12-21 04:56:29,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:56:29,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-21 04:56:29,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:56:29,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-21 04:56:29,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2023-12-21 04:56:29,902 INFO L87 Difference]: Start difference. First operand 357 states and 486 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:45,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:56:45,493 INFO L93 Difference]: Finished difference Result 1298 states and 1653 transitions. [2023-12-21 04:56:45,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2023-12-21 04:56:45,494 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-21 04:56:45,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:56:45,497 INFO L225 Difference]: With dead ends: 1298 [2023-12-21 04:56:45,497 INFO L226 Difference]: Without dead ends: 1218 [2023-12-21 04:56:45,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 46 SyntacticMatches, 12 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30329 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=3844, Invalid=68786, Unknown=0, NotChecked=0, Total=72630 [2023-12-21 04:56:45,503 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 784 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 3045 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 3492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 3045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-21 04:56:45,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [784 Valid, 581 Invalid, 3492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 3045 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-21 04:56:45,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2023-12-21 04:56:45,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 391. [2023-12-21 04:56:45,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.3692307692307693) internal successors, (534), 390 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:45,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 534 transitions. [2023-12-21 04:56:45,740 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 534 transitions. Word has length 30 [2023-12-21 04:56:45,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:56:45,740 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 534 transitions. [2023-12-21 04:56:45,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:45,740 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 534 transitions. [2023-12-21 04:56:45,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-21 04:56:45,741 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:56:45,741 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:56:45,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-21 04:56:45,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-21 04:56:45,947 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:56:45,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:56:45,947 INFO L85 PathProgramCache]: Analyzing trace with hash -654281416, now seen corresponding path program 3 times [2023-12-21 04:56:45,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:56:45,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040017389] [2023-12-21 04:56:45,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:45,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:56:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:46,137 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 04:56:46,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:56:46,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040017389] [2023-12-21 04:56:46,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040017389] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:56:46,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830647692] [2023-12-21 04:56:46,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 04:56:46,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:46,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:56:46,139 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) [2023-12-21 04:56:46,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-21 04:56:46,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-21 04:56:46,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:56:46,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-21 04:56:46,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:56:46,303 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-21 04:56:46,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:56:46,427 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-21 04:56:46,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830647692] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:56:46,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:56:46,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 25 [2023-12-21 04:56:46,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102714131] [2023-12-21 04:56:46,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:56:46,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-21 04:56:46,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:56:46,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-21 04:56:46,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-12-21 04:56:46,430 INFO L87 Difference]: Start difference. First operand 391 states and 534 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:47,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:56:47,854 INFO L93 Difference]: Finished difference Result 743 states and 1105 transitions. [2023-12-21 04:56:47,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-12-21 04:56:47,854 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-21 04:56:47,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:56:47,856 INFO L225 Difference]: With dead ends: 743 [2023-12-21 04:56:47,856 INFO L226 Difference]: Without dead ends: 640 [2023-12-21 04:56:47,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=565, Invalid=2627, Unknown=0, NotChecked=0, Total=3192 [2023-12-21 04:56:47,857 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 262 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 04:56:47,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 500 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 04:56:47,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2023-12-21 04:56:48,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 443. [2023-12-21 04:56:48,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.3710407239819005) internal successors, (606), 442 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:48,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 606 transitions. [2023-12-21 04:56:48,153 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 606 transitions. Word has length 30 [2023-12-21 04:56:48,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:56:48,153 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 606 transitions. [2023-12-21 04:56:48,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:48,153 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 606 transitions. [2023-12-21 04:56:48,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-21 04:56:48,154 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:56:48,154 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:56:48,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-21 04:56:48,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-21 04:56:48,355 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:56:48,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:56:48,355 INFO L85 PathProgramCache]: Analyzing trace with hash 657800027, now seen corresponding path program 6 times [2023-12-21 04:56:48,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:56:48,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442714398] [2023-12-21 04:56:48,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:48,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:56:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:48,546 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-21 04:56:48,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:56:48,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442714398] [2023-12-21 04:56:48,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442714398] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:56:48,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135528954] [2023-12-21 04:56:48,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 04:56:48,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:48,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:56:48,547 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) [2023-12-21 04:56:48,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-21 04:56:48,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-12-21 04:56:48,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:56:48,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-21 04:56:48,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:56:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-21 04:56:48,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:56:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-21 04:56:48,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135528954] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:56:48,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:56:48,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2023-12-21 04:56:48,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054749269] [2023-12-21 04:56:48,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:56:48,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-21 04:56:48,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:56:48,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-21 04:56:48,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-12-21 04:56:48,702 INFO L87 Difference]: Start difference. First operand 443 states and 606 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2023-12-21 04:56:50,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:56:50,347 INFO L93 Difference]: Finished difference Result 1029 states and 1332 transitions. [2023-12-21 04:56:50,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-21 04:56:50,347 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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 31 [2023-12-21 04:56:50,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:56:50,350 INFO L225 Difference]: With dead ends: 1029 [2023-12-21 04:56:50,350 INFO L226 Difference]: Without dead ends: 965 [2023-12-21 04:56:50,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2023-12-21 04:56:50,350 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 229 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 04:56:50,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 137 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 04:56:50,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2023-12-21 04:56:50,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 468. [2023-12-21 04:56:50,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 1.3576017130620985) internal successors, (634), 467 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:50,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 634 transitions. [2023-12-21 04:56:50,718 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 634 transitions. Word has length 31 [2023-12-21 04:56:50,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:56:50,718 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 634 transitions. [2023-12-21 04:56:50,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2023-12-21 04:56:50,718 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 634 transitions. [2023-12-21 04:56:50,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-21 04:56:50,719 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:56:50,719 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:56:50,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-21 04:56:50,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-21 04:56:50,925 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:56:50,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:56:50,925 INFO L85 PathProgramCache]: Analyzing trace with hash 556633640, now seen corresponding path program 4 times [2023-12-21 04:56:50,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:56:50,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160748589] [2023-12-21 04:56:50,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:50,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:56:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 04:56:51,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:56:51,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160748589] [2023-12-21 04:56:51,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160748589] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:56:51,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369874597] [2023-12-21 04:56:51,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 04:56:51,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:51,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:56:51,146 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) [2023-12-21 04:56:51,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-21 04:56:51,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 04:56:51,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:56:51,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-21 04:56:51,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:56:51,243 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 04:56:51,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:56:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-12-21 04:56:51,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369874597] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:56:51,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:56:51,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 7] total 23 [2023-12-21 04:56:51,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114815614] [2023-12-21 04:56:51,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:56:51,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-21 04:56:51,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:56:51,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-21 04:56:51,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2023-12-21 04:56:51,353 INFO L87 Difference]: Start difference. First operand 468 states and 634 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:52,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:56:52,645 INFO L93 Difference]: Finished difference Result 914 states and 1333 transitions. [2023-12-21 04:56:52,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-21 04:56:52,645 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-12-21 04:56:52,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:56:52,647 INFO L225 Difference]: With dead ends: 914 [2023-12-21 04:56:52,647 INFO L226 Difference]: Without dead ends: 817 [2023-12-21 04:56:52,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=375, Invalid=1107, Unknown=0, NotChecked=0, Total=1482 [2023-12-21 04:56:52,648 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 248 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 04:56:52,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 685 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 04:56:52,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2023-12-21 04:56:53,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 574. [2023-12-21 04:56:53,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 1.3403141361256545) internal successors, (768), 573 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:53,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 768 transitions. [2023-12-21 04:56:53,115 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 768 transitions. Word has length 32 [2023-12-21 04:56:53,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:56:53,115 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 768 transitions. [2023-12-21 04:56:53,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:53,115 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 768 transitions. [2023-12-21 04:56:53,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-21 04:56:53,116 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:56:53,116 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:56:53,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-21 04:56:53,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:53,319 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:56:53,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:56:53,319 INFO L85 PathProgramCache]: Analyzing trace with hash 572018029, now seen corresponding path program 5 times [2023-12-21 04:56:53,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:56:53,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800384023] [2023-12-21 04:56:53,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:53,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:56:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-21 04:56:53,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:56:53,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800384023] [2023-12-21 04:56:53,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800384023] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:56:53,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248857648] [2023-12-21 04:56:53,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 04:56:53,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:53,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:56:53,523 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) [2023-12-21 04:56:53,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-21 04:56:53,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-21 04:56:53,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:56:53,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-21 04:56:53,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:56:54,010 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-21 04:56:54,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:56:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-21 04:56:54,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248857648] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:56:54,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:56:54,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 38 [2023-12-21 04:56:54,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467112399] [2023-12-21 04:56:54,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:56:54,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-21 04:56:54,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:56:54,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-21 04:56:54,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2023-12-21 04:56:54,344 INFO L87 Difference]: Start difference. First operand 574 states and 768 transitions. Second operand has 38 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:57:01,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:57:01,455 INFO L93 Difference]: Finished difference Result 948 states and 1310 transitions. [2023-12-21 04:57:01,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-12-21 04:57:01,455 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-12-21 04:57:01,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:57:01,457 INFO L225 Difference]: With dead ends: 948 [2023-12-21 04:57:01,457 INFO L226 Difference]: Without dead ends: 746 [2023-12-21 04:57:01,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3823 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1075, Invalid=12265, Unknown=0, NotChecked=0, Total=13340 [2023-12-21 04:57:01,459 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 266 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-21 04:57:01,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 453 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 1401 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-21 04:57:01,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2023-12-21 04:57:01,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 561. [2023-12-21 04:57:01,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 1.3375) internal successors, (749), 560 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:57:01,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 749 transitions. [2023-12-21 04:57:01,845 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 749 transitions. Word has length 33 [2023-12-21 04:57:01,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:57:01,845 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 749 transitions. [2023-12-21 04:57:01,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:57:01,845 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 749 transitions. [2023-12-21 04:57:01,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-21 04:57:01,846 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:57:01,846 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:57:01,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-21 04:57:02,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-21 04:57:02,052 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:57:02,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:57:02,052 INFO L85 PathProgramCache]: Analyzing trace with hash 869260156, now seen corresponding path program 8 times [2023-12-21 04:57:02,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:57:02,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65937294] [2023-12-21 04:57:02,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:57:02,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:57:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:57:02,334 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:57:02,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:57:02,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65937294] [2023-12-21 04:57:02,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65937294] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:57:02,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832940328] [2023-12-21 04:57:02,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:57:02,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:57:02,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:57:02,336 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) [2023-12-21 04:57:02,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-21 04:57:02,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:57:02,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:57:02,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-21 04:57:02,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:57:02,562 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-21 04:57:02,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:57:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-21 04:57:02,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832940328] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:57:02,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:57:02,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 27 [2023-12-21 04:57:02,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672375114] [2023-12-21 04:57:02,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:57:02,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-21 04:57:02,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:57:02,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-21 04:57:02,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2023-12-21 04:57:02,841 INFO L87 Difference]: Start difference. First operand 561 states and 749 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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) [2023-12-21 04:57:42,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:57:42,462 INFO L93 Difference]: Finished difference Result 2003 states and 2499 transitions. [2023-12-21 04:57:42,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 371 states. [2023-12-21 04:57:42,462 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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 33 [2023-12-21 04:57:42,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:57:42,466 INFO L225 Difference]: With dead ends: 2003 [2023-12-21 04:57:42,466 INFO L226 Difference]: Without dead ends: 1903 [2023-12-21 04:57:42,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 50 SyntacticMatches, 14 SemanticMatches, 384 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65043 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=6843, Invalid=141767, Unknown=0, NotChecked=0, Total=148610 [2023-12-21 04:57:42,473 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 1141 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 4867 mSolverCounterSat, 923 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1141 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 5790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 923 IncrementalHoareTripleChecker+Valid, 4867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-12-21 04:57:42,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1141 Valid, 745 Invalid, 5790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [923 Valid, 4867 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-12-21 04:57:42,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2023-12-21 04:57:42,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 636. [2023-12-21 04:57:42,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 1.330708661417323) internal successors, (845), 635 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:57:42,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 845 transitions. [2023-12-21 04:57:42,973 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 845 transitions. Word has length 33 [2023-12-21 04:57:42,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:57:42,974 INFO L495 AbstractCegarLoop]: Abstraction has 636 states and 845 transitions. [2023-12-21 04:57:42,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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) [2023-12-21 04:57:42,974 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 845 transitions. [2023-12-21 04:57:42,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-21 04:57:42,975 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:57:42,975 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:57:42,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-21 04:57:43,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:57:43,181 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:57:43,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:57:43,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1251258075, now seen corresponding path program 7 times [2023-12-21 04:57:43,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:57:43,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860301390] [2023-12-21 04:57:43,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:57:43,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:57:43,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:57:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-21 04:57:43,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:57:43,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860301390] [2023-12-21 04:57:43,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860301390] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:57:43,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187562893] [2023-12-21 04:57:43,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 04:57:43,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:57:43,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:57:43,424 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) [2023-12-21 04:57:43,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-21 04:57:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:57:43,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-21 04:57:43,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:57:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-21 04:57:43,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:57:43,621 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-21 04:57:43,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187562893] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:57:43,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:57:43,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2023-12-21 04:57:43,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948132776] [2023-12-21 04:57:43,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:57:43,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-21 04:57:43,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:57:43,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-21 04:57:43,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-12-21 04:57:43,623 INFO L87 Difference]: Start difference. First operand 636 states and 845 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:57:44,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:57:44,976 INFO L93 Difference]: Finished difference Result 1053 states and 1379 transitions. [2023-12-21 04:57:44,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 04:57:44,977 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-12-21 04:57:44,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:57:44,979 INFO L225 Difference]: With dead ends: 1053 [2023-12-21 04:57:44,979 INFO L226 Difference]: Without dead ends: 875 [2023-12-21 04:57:44,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 67 SyntacticMatches, 14 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-21 04:57:44,979 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 04:57:44,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 197 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 04:57:44,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2023-12-21 04:57:45,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 609. [2023-12-21 04:57:45,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 608 states have (on average 1.3404605263157894) internal successors, (815), 608 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:57:45,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 815 transitions. [2023-12-21 04:57:45,474 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 815 transitions. Word has length 35 [2023-12-21 04:57:45,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:57:45,474 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 815 transitions. [2023-12-21 04:57:45,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:57:45,474 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 815 transitions. [2023-12-21 04:57:45,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-21 04:57:45,475 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:57:45,475 INFO L195 NwaCegarLoop]: trace histogram [11, 8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:57:45,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-21 04:57:45,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-12-21 04:57:45,684 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:57:45,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:57:45,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1543098963, now seen corresponding path program 9 times [2023-12-21 04:57:45,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:57:45,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413008040] [2023-12-21 04:57:45,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:57:45,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:57:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:57:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 04:57:46,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:57:46,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413008040] [2023-12-21 04:57:46,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413008040] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:57:46,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036826285] [2023-12-21 04:57:46,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 04:57:46,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:57:46,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:57:46,002 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) [2023-12-21 04:57:46,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-21 04:57:46,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-21 04:57:46,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:57:46,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-21 04:57:46,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:57:46,162 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-12-21 04:57:46,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:57:46,289 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-12-21 04:57:46,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036826285] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:57:46,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:57:46,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 6, 6] total 27 [2023-12-21 04:57:46,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908775594] [2023-12-21 04:57:46,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:57:46,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-21 04:57:46,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:57:46,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-21 04:57:46,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2023-12-21 04:57:46,291 INFO L87 Difference]: Start difference. First operand 609 states and 815 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 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) [2023-12-21 04:57:49,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:57:49,804 INFO L93 Difference]: Finished difference Result 1124 states and 1606 transitions. [2023-12-21 04:57:49,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-12-21 04:57:49,805 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 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 35 [2023-12-21 04:57:49,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:57:49,807 INFO L225 Difference]: With dead ends: 1124 [2023-12-21 04:57:49,807 INFO L226 Difference]: Without dead ends: 795 [2023-12-21 04:57:49,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5576 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1360, Invalid=15932, Unknown=0, NotChecked=0, Total=17292 [2023-12-21 04:57:49,808 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 151 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 2547 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 2696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-21 04:57:49,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 652 Invalid, 2696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2547 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-21 04:57:49,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2023-12-21 04:57:50,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 606. [2023-12-21 04:57:50,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 1.3520661157024794) internal successors, (818), 605 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:57:50,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 818 transitions. [2023-12-21 04:57:50,364 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 818 transitions. Word has length 35 [2023-12-21 04:57:50,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:57:50,364 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 818 transitions. [2023-12-21 04:57:50,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 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) [2023-12-21 04:57:50,364 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 818 transitions. [2023-12-21 04:57:50,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-21 04:57:50,365 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:57:50,365 INFO L195 NwaCegarLoop]: trace histogram [13, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:57:50,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-21 04:57:50,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:57:50,571 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:57:50,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:57:50,572 INFO L85 PathProgramCache]: Analyzing trace with hash -609980499, now seen corresponding path program 8 times [2023-12-21 04:57:50,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:57:50,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009795481] [2023-12-21 04:57:50,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:57:50,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:57:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:57:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 04:57:50,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:57:50,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009795481] [2023-12-21 04:57:50,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009795481] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:57:50,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399326502] [2023-12-21 04:57:50,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:57:50,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:57:50,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:57:50,816 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) [2023-12-21 04:57:50,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-21 04:57:50,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:57:50,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:57:50,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-21 04:57:50,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:57:50,889 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 04:57:50,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:57:50,961 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-12-21 04:57:50,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399326502] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:57:50,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:57:50,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 5] total 23 [2023-12-21 04:57:50,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645917584] [2023-12-21 04:57:50,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:57:50,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-21 04:57:50,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:57:50,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-21 04:57:50,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=460, Unknown=0, NotChecked=0, Total=506 [2023-12-21 04:57:50,963 INFO L87 Difference]: Start difference. First operand 606 states and 818 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:57:52,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:57:52,982 INFO L93 Difference]: Finished difference Result 1123 states and 1627 transitions. [2023-12-21 04:57:52,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-12-21 04:57:52,982 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-12-21 04:57:52,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:57:52,984 INFO L225 Difference]: With dead ends: 1123 [2023-12-21 04:57:52,984 INFO L226 Difference]: Without dead ends: 918 [2023-12-21 04:57:52,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=3456, Unknown=0, NotChecked=0, Total=3660 [2023-12-21 04:57:52,985 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 98 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 1776 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 1865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 04:57:52,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 1097 Invalid, 1865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1776 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 04:57:52,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2023-12-21 04:57:53,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 665. [2023-12-21 04:57:53,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 1.3102409638554218) internal successors, (870), 664 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:57:53,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 870 transitions. [2023-12-21 04:57:53,522 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 870 transitions. Word has length 35 [2023-12-21 04:57:53,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:57:53,522 INFO L495 AbstractCegarLoop]: Abstraction has 665 states and 870 transitions. [2023-12-21 04:57:53,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:57:53,522 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 870 transitions. [2023-12-21 04:57:53,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-21 04:57:53,524 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:57:53,524 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:57:53,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-12-21 04:57:53,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:57:53,729 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:57:53,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:57:53,730 INFO L85 PathProgramCache]: Analyzing trace with hash 882353674, now seen corresponding path program 10 times [2023-12-21 04:57:53,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:57:53,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816998835] [2023-12-21 04:57:53,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:57:53,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:57:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:57:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:57:54,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:57:54,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816998835] [2023-12-21 04:57:54,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816998835] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:57:54,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690646948] [2023-12-21 04:57:54,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 04:57:54,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:57:54,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:57:54,082 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) [2023-12-21 04:57:54,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-21 04:57:54,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 04:57:54,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:57:54,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-21 04:57:54,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:57:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-21 04:57:54,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:57:54,736 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-21 04:57:54,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690646948] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:57:54,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:57:54,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 11] total 30 [2023-12-21 04:57:54,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278943000] [2023-12-21 04:57:54,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:57:54,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-21 04:57:54,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:57:54,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-21 04:57:54,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2023-12-21 04:57:54,738 INFO L87 Difference]: Start difference. First operand 665 states and 870 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 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) [2023-12-21 04:59:18,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:59:18,608 INFO L93 Difference]: Finished difference Result 2590 states and 3161 transitions. [2023-12-21 04:59:18,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 507 states. [2023-12-21 04:59:18,609 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 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 36 [2023-12-21 04:59:18,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:59:18,614 INFO L225 Difference]: With dead ends: 2590 [2023-12-21 04:59:18,614 INFO L226 Difference]: Without dead ends: 2493 [2023-12-21 04:59:18,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 54 SyntacticMatches, 16 SemanticMatches, 522 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123367 ImplicationChecksByTransitivity, 69.4s TimeCoverageRelationStatistics Valid=10890, Invalid=263162, Unknown=0, NotChecked=0, Total=274052 [2023-12-21 04:59:18,622 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1534 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 6532 mSolverCounterSat, 1198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1534 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 7730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1198 IncrementalHoareTripleChecker+Valid, 6532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2023-12-21 04:59:18,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1534 Valid, 767 Invalid, 7730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1198 Valid, 6532 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2023-12-21 04:59:18,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2023-12-21 04:59:19,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 708. [2023-12-21 04:59:19,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 1.3154172560113153) internal successors, (930), 707 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:59:19,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 930 transitions. [2023-12-21 04:59:19,344 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 930 transitions. Word has length 36 [2023-12-21 04:59:19,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:59:19,345 INFO L495 AbstractCegarLoop]: Abstraction has 708 states and 930 transitions. [2023-12-21 04:59:19,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 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) [2023-12-21 04:59:19,348 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 930 transitions. [2023-12-21 04:59:19,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-21 04:59:19,353 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:59:19,353 INFO L195 NwaCegarLoop]: trace histogram [14, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:59:19,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-12-21 04:59:19,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:59:19,559 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:59:19,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:59:19,559 INFO L85 PathProgramCache]: Analyzing trace with hash 649287690, now seen corresponding path program 6 times [2023-12-21 04:59:19,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:59:19,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595990744] [2023-12-21 04:59:19,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:59:19,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:59:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:59:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-21 04:59:19,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:59:19,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595990744] [2023-12-21 04:59:19,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595990744] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:59:19,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144352468] [2023-12-21 04:59:19,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 04:59:19,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:59:19,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:59:19,820 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) [2023-12-21 04:59:19,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-21 04:59:20,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-21 04:59:20,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:59:20,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-21 04:59:20,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:59:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2023-12-21 04:59:20,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:59:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2023-12-21 04:59:20,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144352468] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:59:20,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:59:20,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 11] total 37 [2023-12-21 04:59:20,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265178978] [2023-12-21 04:59:20,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:59:20,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-21 04:59:20,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:59:20,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-21 04:59:20,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1063, Unknown=0, NotChecked=0, Total=1332 [2023-12-21 04:59:20,538 INFO L87 Difference]: Start difference. First operand 708 states and 930 transitions. Second operand has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 37 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:59:24,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:59:24,939 INFO L93 Difference]: Finished difference Result 1256 states and 1783 transitions. [2023-12-21 04:59:24,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-12-21 04:59:24,940 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 37 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-12-21 04:59:24,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:59:24,942 INFO L225 Difference]: With dead ends: 1256 [2023-12-21 04:59:24,942 INFO L226 Difference]: Without dead ends: 1044 [2023-12-21 04:59:24,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2735 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1867, Invalid=9263, Unknown=0, NotChecked=0, Total=11130 [2023-12-21 04:59:24,943 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 570 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 3306 mSolverCounterSat, 610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 3916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 3306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-21 04:59:24,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 950 Invalid, 3916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [610 Valid, 3306 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-21 04:59:24,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2023-12-21 04:59:25,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 657. [2023-12-21 04:59:25,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 1.3048780487804879) internal successors, (856), 656 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:59:25,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 856 transitions. [2023-12-21 04:59:25,600 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 856 transitions. Word has length 36 [2023-12-21 04:59:25,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:59:25,600 INFO L495 AbstractCegarLoop]: Abstraction has 657 states and 856 transitions. [2023-12-21 04:59:25,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 37 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:59:25,600 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 856 transitions. [2023-12-21 04:59:25,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-21 04:59:25,601 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:59:25,601 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:59:25,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-12-21 04:59:25,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-12-21 04:59:25,807 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:59:25,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:59:25,808 INFO L85 PathProgramCache]: Analyzing trace with hash -655498534, now seen corresponding path program 9 times [2023-12-21 04:59:25,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:59:25,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097926645] [2023-12-21 04:59:25,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:59:25,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:59:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:59:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-21 04:59:26,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:59:26,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097926645] [2023-12-21 04:59:26,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097926645] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:59:26,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378159104] [2023-12-21 04:59:26,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 04:59:26,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:59:26,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:59:26,064 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) [2023-12-21 04:59:26,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-21 04:59:26,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-21 04:59:26,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:59:26,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-21 04:59:26,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:59:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-21 04:59:26,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:59:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-21 04:59:26,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378159104] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:59:26,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:59:26,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 18 [2023-12-21 04:59:26,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953428036] [2023-12-21 04:59:26,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:59:26,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-21 04:59:26,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:59:26,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-21 04:59:26,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-12-21 04:59:26,273 INFO L87 Difference]: Start difference. First operand 657 states and 856 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:59:32,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:59:32,359 INFO L93 Difference]: Finished difference Result 1711 states and 2079 transitions. [2023-12-21 04:59:32,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-21 04:59:32,359 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-12-21 04:59:32,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:59:32,363 INFO L225 Difference]: With dead ends: 1711 [2023-12-21 04:59:32,363 INFO L226 Difference]: Without dead ends: 1642 [2023-12-21 04:59:32,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=331, Invalid=1229, Unknown=0, NotChecked=0, Total=1560 [2023-12-21 04:59:32,364 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 255 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-21 04:59:32,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 316 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-21 04:59:32,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2023-12-21 04:59:33,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 702. [2023-12-21 04:59:33,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 1.296718972895863) internal successors, (909), 701 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:59:33,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 909 transitions. [2023-12-21 04:59:33,082 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 909 transitions. Word has length 37 [2023-12-21 04:59:33,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:59:33,082 INFO L495 AbstractCegarLoop]: Abstraction has 702 states and 909 transitions. [2023-12-21 04:59:33,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:59:33,082 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 909 transitions. [2023-12-21 04:59:33,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-21 04:59:33,083 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:59:33,083 INFO L195 NwaCegarLoop]: trace histogram [15, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:59:33,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-12-21 04:59:33,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-21 04:59:33,289 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:59:33,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:59:33,289 INFO L85 PathProgramCache]: Analyzing trace with hash 2134847928, now seen corresponding path program 10 times [2023-12-21 04:59:33,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:59:33,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854129806] [2023-12-21 04:59:33,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:59:33,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:59:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:59:33,547 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 04:59:33,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:59:33,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854129806] [2023-12-21 04:59:33,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854129806] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:59:33,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50212594] [2023-12-21 04:59:33,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 04:59:33,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:59:33,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:59:33,552 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) [2023-12-21 04:59:33,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-21 04:59:33,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 04:59:33,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:59:33,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-21 04:59:33,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:59:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 04:59:33,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:59:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-12-21 04:59:33,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50212594] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:59:33,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:59:33,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 8] total 30 [2023-12-21 04:59:33,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323495129] [2023-12-21 04:59:33,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:59:33,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-21 04:59:33,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:59:33,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-21 04:59:33,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2023-12-21 04:59:33,814 INFO L87 Difference]: Start difference. First operand 702 states and 909 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:59:37,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:59:37,351 INFO L93 Difference]: Finished difference Result 1217 states and 1700 transitions. [2023-12-21 04:59:37,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-12-21 04:59:37,351 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-12-21 04:59:37,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:59:37,353 INFO L225 Difference]: With dead ends: 1217 [2023-12-21 04:59:37,353 INFO L226 Difference]: Without dead ends: 984 [2023-12-21 04:59:37,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=550, Invalid=8380, Unknown=0, NotChecked=0, Total=8930 [2023-12-21 04:59:37,354 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 172 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 2121 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1397 SdHoareTripleChecker+Invalid, 2321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 2121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-21 04:59:37,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 1397 Invalid, 2321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 2121 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-21 04:59:37,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2023-12-21 04:59:38,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 709. [2023-12-21 04:59:38,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 708 states have (on average 1.2909604519774012) internal successors, (914), 708 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:59:38,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 914 transitions. [2023-12-21 04:59:38,110 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 914 transitions. Word has length 38 [2023-12-21 04:59:38,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:59:38,111 INFO L495 AbstractCegarLoop]: Abstraction has 709 states and 914 transitions. [2023-12-21 04:59:38,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:59:38,111 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 914 transitions. [2023-12-21 04:59:38,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-21 04:59:38,112 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:59:38,112 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:59:38,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-12-21 04:59:38,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:59:38,315 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:59:38,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:59:38,315 INFO L85 PathProgramCache]: Analyzing trace with hash 212229180, now seen corresponding path program 11 times [2023-12-21 04:59:38,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:59:38,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500534715] [2023-12-21 04:59:38,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:59:38,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:59:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:59:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:59:38,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:59:38,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500534715] [2023-12-21 04:59:38,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500534715] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:59:38,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146811269] [2023-12-21 04:59:38,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 04:59:38,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:59:38,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:59:38,667 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) [2023-12-21 04:59:38,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-21 04:59:40,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-21 04:59:40,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:59:40,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 64 conjunts are in the unsatisfiable core [2023-12-21 04:59:40,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:59:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:59:40,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:59:40,887 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-21 04:59:40,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146811269] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:59:40,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:59:40,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 30, 21] total 53 [2023-12-21 04:59:40,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604238417] [2023-12-21 04:59:40,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:59:40,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-12-21 04:59:40,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:59:40,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-12-21 04:59:40,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=2215, Unknown=0, NotChecked=0, Total=2756 [2023-12-21 04:59:40,892 INFO L87 Difference]: Start difference. First operand 709 states and 914 transitions. Second operand has 53 states, 53 states have (on average 1.528301886792453) internal successors, (81), 53 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:59:55,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:59:55,704 INFO L93 Difference]: Finished difference Result 1605 states and 2318 transitions. [2023-12-21 04:59:55,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2023-12-21 04:59:55,705 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.528301886792453) internal successors, (81), 53 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-12-21 04:59:55,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:59:55,708 INFO L225 Difference]: With dead ends: 1605 [2023-12-21 04:59:55,708 INFO L226 Difference]: Without dead ends: 1514 [2023-12-21 04:59:55,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12302 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=7792, Invalid=26990, Unknown=0, NotChecked=0, Total=34782 [2023-12-21 04:59:55,710 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 1019 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 7053 mSolverCounterSat, 847 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1019 SdHoareTripleChecker+Valid, 1236 SdHoareTripleChecker+Invalid, 7900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 847 IncrementalHoareTripleChecker+Valid, 7053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-21 04:59:55,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1019 Valid, 1236 Invalid, 7900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [847 Valid, 7053 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-21 04:59:55,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2023-12-21 04:59:56,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 830. [2023-12-21 04:59:56,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 1.3172496984318456) internal successors, (1092), 829 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:59:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1092 transitions. [2023-12-21 04:59:56,735 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1092 transitions. Word has length 39 [2023-12-21 04:59:56,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:59:56,735 INFO L495 AbstractCegarLoop]: Abstraction has 830 states and 1092 transitions. [2023-12-21 04:59:56,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.528301886792453) internal successors, (81), 53 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:59:56,735 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1092 transitions. [2023-12-21 04:59:56,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-21 04:59:56,736 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:59:56,736 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:59:56,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-12-21 04:59:56,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-12-21 04:59:56,946 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:59:56,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:59:56,946 INFO L85 PathProgramCache]: Analyzing trace with hash -431456614, now seen corresponding path program 11 times [2023-12-21 04:59:56,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:59:56,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356250070] [2023-12-21 04:59:56,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:59:56,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:59:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:59:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-21 04:59:57,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:59:57,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356250070] [2023-12-21 04:59:57,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356250070] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:59:57,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889549456] [2023-12-21 04:59:57,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 04:59:57,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:59:57,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:59:57,174 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) [2023-12-21 04:59:57,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-21 04:59:57,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-21 04:59:57,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:59:57,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-21 04:59:57,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:59:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-21 04:59:57,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:59:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-21 04:59:57,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889549456] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:59:57,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:59:57,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2023-12-21 04:59:57,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956094153] [2023-12-21 04:59:57,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:59:57,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-21 04:59:57,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:59:57,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-21 04:59:57,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-12-21 04:59:57,609 INFO L87 Difference]: Start difference. First operand 830 states and 1092 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:00:00,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 05:00:00,459 INFO L93 Difference]: Finished difference Result 1444 states and 1834 transitions. [2023-12-21 05:00:00,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 05:00:00,460 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-12-21 05:00:00,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 05:00:00,462 INFO L225 Difference]: With dead ends: 1444 [2023-12-21 05:00:00,462 INFO L226 Difference]: Without dead ends: 1264 [2023-12-21 05:00:00,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 16 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-21 05:00:00,463 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 32 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 05:00:00,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 243 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 05:00:00,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2023-12-21 05:00:01,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 809. [2023-12-21 05:00:01,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 1.318069306930693) internal successors, (1065), 808 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:00:01,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1065 transitions. [2023-12-21 05:00:01,488 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1065 transitions. Word has length 41 [2023-12-21 05:00:01,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 05:00:01,488 INFO L495 AbstractCegarLoop]: Abstraction has 809 states and 1065 transitions. [2023-12-21 05:00:01,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:00:01,488 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1065 transitions. [2023-12-21 05:00:01,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-21 05:00:01,489 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 05:00:01,489 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 05:00:01,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-12-21 05:00:01,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-21 05:00:01,690 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 05:00:01,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 05:00:01,690 INFO L85 PathProgramCache]: Analyzing trace with hash -228955718, now seen corresponding path program 12 times [2023-12-21 05:00:01,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 05:00:01,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908472817] [2023-12-21 05:00:01,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:00:01,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 05:00:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 05:00:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-12-21 05:00:02,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 05:00:02,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908472817] [2023-12-21 05:00:02,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908472817] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 05:00:02,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429771732] [2023-12-21 05:00:02,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 05:00:02,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:00:02,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 05:00:02,017 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) [2023-12-21 05:00:02,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-21 05:00:02,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-21 05:00:02,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 05:00:02,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-21 05:00:02,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 05:00:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-21 05:00:02,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 05:00:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-21 05:00:02,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429771732] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 05:00:02,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 05:00:02,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 24 [2023-12-21 05:00:02,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445091142] [2023-12-21 05:00:02,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 05:00:02,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-21 05:00:02,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 05:00:02,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-21 05:00:02,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2023-12-21 05:00:02,298 INFO L87 Difference]: Start difference. First operand 809 states and 1065 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2023-12-21 05:00:08,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 05:00:08,877 INFO L93 Difference]: Finished difference Result 1813 states and 2229 transitions. [2023-12-21 05:00:08,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-21 05:00:08,878 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 41 [2023-12-21 05:00:08,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 05:00:08,882 INFO L225 Difference]: With dead ends: 1813 [2023-12-21 05:00:08,882 INFO L226 Difference]: Without dead ends: 1734 [2023-12-21 05:00:08,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=277, Invalid=913, Unknown=0, NotChecked=0, Total=1190 [2023-12-21 05:00:08,883 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 323 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 05:00:08,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 473 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 05:00:08,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2023-12-21 05:00:10,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 833. [2023-12-21 05:00:10,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 1.2884615384615385) internal successors, (1072), 832 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:00:10,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1072 transitions. [2023-12-21 05:00:10,006 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1072 transitions. Word has length 41 [2023-12-21 05:00:10,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 05:00:10,006 INFO L495 AbstractCegarLoop]: Abstraction has 833 states and 1072 transitions. [2023-12-21 05:00:10,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2023-12-21 05:00:10,006 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1072 transitions. [2023-12-21 05:00:10,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-21 05:00:10,008 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 05:00:10,008 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 05:00:10,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-12-21 05:00:10,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-12-21 05:00:10,214 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 05:00:10,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 05:00:10,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1787728694, now seen corresponding path program 12 times [2023-12-21 05:00:10,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 05:00:10,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592458489] [2023-12-21 05:00:10,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:00:10,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 05:00:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 05:00:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 05:00:10,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 05:00:10,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592458489] [2023-12-21 05:00:10,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592458489] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 05:00:10,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129440207] [2023-12-21 05:00:10,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 05:00:10,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:00:10,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 05:00:10,597 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) [2023-12-21 05:00:10,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-21 05:00:10,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-12-21 05:00:10,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 05:00:10,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 70 conjunts are in the unsatisfiable core [2023-12-21 05:00:10,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 05:00:11,071 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 05:00:11,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 05:00:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-21 05:00:11,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129440207] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 05:00:11,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 05:00:11,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 33, 23] total 58 [2023-12-21 05:00:11,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852206623] [2023-12-21 05:00:11,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 05:00:11,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-12-21 05:00:11,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 05:00:11,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-12-21 05:00:11,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=2667, Unknown=0, NotChecked=0, Total=3306 [2023-12-21 05:00:11,746 INFO L87 Difference]: Start difference. First operand 833 states and 1072 transitions. Second operand has 58 states, 58 states have (on average 1.5) internal successors, (87), 58 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:00:34,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 05:00:34,724 INFO L93 Difference]: Finished difference Result 1826 states and 2571 transitions. [2023-12-21 05:00:34,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2023-12-21 05:00:34,725 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.5) internal successors, (87), 58 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-12-21 05:00:34,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 05:00:34,730 INFO L225 Difference]: With dead ends: 1826 [2023-12-21 05:00:34,731 INFO L226 Difference]: Without dead ends: 1726 [2023-12-21 05:00:34,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16475 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=10435, Invalid=36871, Unknown=0, NotChecked=0, Total=47306 [2023-12-21 05:00:34,736 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 843 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 6874 mSolverCounterSat, 706 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 1311 SdHoareTripleChecker+Invalid, 7580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 706 IncrementalHoareTripleChecker+Valid, 6874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-12-21 05:00:34,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [843 Valid, 1311 Invalid, 7580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [706 Valid, 6874 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-12-21 05:00:34,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2023-12-21 05:00:36,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 884. [2023-12-21 05:00:36,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 1.2967157417893544) internal successors, (1145), 883 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:00:36,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1145 transitions. [2023-12-21 05:00:36,086 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1145 transitions. Word has length 42 [2023-12-21 05:00:36,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 05:00:36,086 INFO L495 AbstractCegarLoop]: Abstraction has 884 states and 1145 transitions. [2023-12-21 05:00:36,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.5) internal successors, (87), 58 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:00:36,086 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1145 transitions. [2023-12-21 05:00:36,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-21 05:00:36,087 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 05:00:36,087 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 05:00:36,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-12-21 05:00:36,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:00:36,288 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 05:00:36,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 05:00:36,288 INFO L85 PathProgramCache]: Analyzing trace with hash -218517415, now seen corresponding path program 13 times [2023-12-21 05:00:36,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 05:00:36,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41032927] [2023-12-21 05:00:36,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:00:36,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 05:00:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 05:00:36,608 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-21 05:00:36,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 05:00:36,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41032927] [2023-12-21 05:00:36,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41032927] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 05:00:36,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085733937] [2023-12-21 05:00:36,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 05:00:36,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:00:36,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 05:00:36,610 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) [2023-12-21 05:00:36,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-21 05:00:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 05:00:36,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-21 05:00:36,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 05:00:36,806 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-21 05:00:36,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 05:00:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-12-21 05:00:37,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085733937] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 05:00:37,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 05:00:37,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 10] total 35 [2023-12-21 05:00:37,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254348006] [2023-12-21 05:00:37,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 05:00:37,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-21 05:00:37,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 05:00:37,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-21 05:00:37,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1065, Unknown=0, NotChecked=0, Total=1190 [2023-12-21 05:00:37,033 INFO L87 Difference]: Start difference. First operand 884 states and 1145 transitions. Second operand has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:00:43,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 05:00:43,293 INFO L93 Difference]: Finished difference Result 1532 states and 2129 transitions. [2023-12-21 05:00:43,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-12-21 05:00:43,293 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-12-21 05:00:43,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 05:00:43,296 INFO L225 Difference]: With dead ends: 1532 [2023-12-21 05:00:43,297 INFO L226 Difference]: Without dead ends: 1216 [2023-12-21 05:00:43,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4628 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=878, Invalid=15124, Unknown=0, NotChecked=0, Total=16002 [2023-12-21 05:00:43,298 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 200 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 2405 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1673 SdHoareTripleChecker+Invalid, 2684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 2405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-21 05:00:43,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1673 Invalid, 2684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 2405 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-21 05:00:43,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2023-12-21 05:00:44,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 895. [2023-12-21 05:00:44,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 1.2919463087248322) internal successors, (1155), 894 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:00:44,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1155 transitions. [2023-12-21 05:00:44,659 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1155 transitions. Word has length 42 [2023-12-21 05:00:44,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 05:00:44,659 INFO L495 AbstractCegarLoop]: Abstraction has 895 states and 1155 transitions. [2023-12-21 05:00:44,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:00:44,659 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1155 transitions. [2023-12-21 05:00:44,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-21 05:00:44,660 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 05:00:44,660 INFO L195 NwaCegarLoop]: trace histogram [17, 9, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 05:00:44,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-12-21 05:00:44,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:00:44,860 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 05:00:44,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 05:00:44,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1509739652, now seen corresponding path program 13 times [2023-12-21 05:00:44,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 05:00:44,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782006949] [2023-12-21 05:00:44,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:00:44,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 05:00:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 05:00:45,359 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 05:00:45,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 05:00:45,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782006949] [2023-12-21 05:00:45,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782006949] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 05:00:45,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078296880] [2023-12-21 05:00:45,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 05:00:45,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:00:45,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 05:00:45,361 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) [2023-12-21 05:00:45,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-12-21 05:00:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 05:00:45,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-21 05:00:45,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 05:00:45,771 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-21 05:00:45,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 05:00:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-21 05:00:46,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078296880] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 05:00:46,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 05:00:46,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 12, 12] total 40 [2023-12-21 05:00:46,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740524666] [2023-12-21 05:00:46,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 05:00:46,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-21 05:00:46,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 05:00:46,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-21 05:00:46,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1474, Unknown=0, NotChecked=0, Total=1560 [2023-12-21 05:00:46,300 INFO L87 Difference]: Start difference. First operand 895 states and 1155 transitions. Second operand has 40 states, 40 states have (on average 1.625) internal successors, (65), 40 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:04:48,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 05:04:48,749 INFO L93 Difference]: Finished difference Result 4391 states and 5781 transitions. [2023-12-21 05:04:48,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 937 states. [2023-12-21 05:04:48,750 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.625) internal successors, (65), 40 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-12-21 05:04:48,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 05:04:48,757 INFO L225 Difference]: With dead ends: 4391 [2023-12-21 05:04:48,757 INFO L226 Difference]: Without dead ends: 3988 [2023-12-21 05:04:48,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1039 GetRequests, 76 SyntacticMatches, 18 SemanticMatches, 945 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415047 ImplicationChecksByTransitivity, 203.9s TimeCoverageRelationStatistics Valid=25295, Invalid=870567, Unknown=0, NotChecked=0, Total=895862 [2023-12-21 05:04:48,794 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 1750 mSDsluCounter, 1784 mSDsCounter, 0 mSdLazyCounter, 10343 mSolverCounterSat, 1485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1750 SdHoareTripleChecker+Valid, 1856 SdHoareTripleChecker+Invalid, 11828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1485 IncrementalHoareTripleChecker+Valid, 10343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.6s IncrementalHoareTripleChecker+Time [2023-12-21 05:04:48,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1750 Valid, 1856 Invalid, 11828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1485 Valid, 10343 Invalid, 0 Unknown, 0 Unchecked, 19.6s Time] [2023-12-21 05:04:48,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3988 states. [2023-12-21 05:04:50,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3988 to 952. [2023-12-21 05:04:50,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 1.2944269190325972) internal successors, (1231), 951 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:04:50,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1231 transitions. [2023-12-21 05:04:50,357 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1231 transitions. Word has length 43 [2023-12-21 05:04:50,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 05:04:50,357 INFO L495 AbstractCegarLoop]: Abstraction has 952 states and 1231 transitions. [2023-12-21 05:04:50,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.625) internal successors, (65), 40 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:04:50,358 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1231 transitions. [2023-12-21 05:04:50,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-21 05:04:50,359 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 05:04:50,359 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 05:04:50,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-12-21 05:04:50,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-12-21 05:04:50,560 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 05:04:50,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 05:04:50,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1734587140, now seen corresponding path program 14 times [2023-12-21 05:04:50,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 05:04:50,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343257498] [2023-12-21 05:04:50,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:04:50,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 05:04:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 05:04:51,106 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 05:04:51,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 05:04:51,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343257498] [2023-12-21 05:04:51,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343257498] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 05:04:51,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137515376] [2023-12-21 05:04:51,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 05:04:51,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:04:51,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 05:04:51,108 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) [2023-12-21 05:04:51,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-12-21 05:04:51,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 05:04:51,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 05:04:51,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-21 05:04:51,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 05:04:51,532 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-12-21 05:04:51,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 05:04:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-12-21 05:04:52,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137515376] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 05:04:52,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 05:04:52,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14, 14] total 39 [2023-12-21 05:04:52,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622253453] [2023-12-21 05:04:52,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 05:04:52,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-21 05:04:52,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 05:04:52,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-21 05:04:52,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2023-12-21 05:04:52,135 INFO L87 Difference]: Start difference. First operand 952 states and 1231 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 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) Received shutdown request... [2023-12-21 05:10:11,571 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-21 05:10:11,582 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-21 05:10:11,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2023-12-21 05:10:11,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 66 SyntacticMatches, 22 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31332 ImplicationChecksByTransitivity, 289.3s TimeCoverageRelationStatistics Valid=5398, Invalid=77258, Unknown=0, NotChecked=0, Total=82656 [2023-12-21 05:10:11,686 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 685 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 7217 mSolverCounterSat, 768 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 7985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 768 IncrementalHoareTripleChecker+Valid, 7217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.8s IncrementalHoareTripleChecker+Time [2023-12-21 05:10:11,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 66 Invalid, 7985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [768 Valid, 7217 Invalid, 0 Unknown, 0 Unchecked, 26.8s Time] [2023-12-21 05:10:11,688 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 05:10:11,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-12-21 05:10:11,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-12-21 05:10:11,889 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (952states) and FLOYD_HOARE automaton (currently 253 states, 39 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDA2 was simplifying a ∧-13-1 term,while SimplifyDDA2 was simplifying 13 xjuncts wrt. a ATOM-1 context. [2023-12-21 05:10:11,892 INFO L445 BasicCegarLoop]: Path program histogram: [14, 13, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 05:10:11,894 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 05:10:11,895 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 05:10:11 BoogieIcfgContainer [2023-12-21 05:10:11,896 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 05:10:11,896 INFO L158 Benchmark]: Toolchain (without parser) took 854489.86ms. Allocated memory was 224.4MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 176.0MB in the beginning and 746.9MB in the end (delta: -570.9MB). Peak memory consumption was 517.3MB. Max. memory is 8.0GB. [2023-12-21 05:10:11,896 INFO L158 Benchmark]: CDTParser took 0.49ms. Allocated memory is still 182.5MB. Free memory was 137.5MB in the beginning and 137.4MB in the end (delta: 71.7kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 05:10:11,896 INFO L158 Benchmark]: CACSL2BoogieTranslator took 201.71ms. Allocated memory is still 224.4MB. Free memory was 176.0MB in the beginning and 165.3MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-21 05:10:11,896 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.61ms. Allocated memory is still 224.4MB. Free memory was 165.3MB in the beginning and 163.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 05:10:11,897 INFO L158 Benchmark]: Boogie Preprocessor took 29.84ms. Allocated memory is still 224.4MB. Free memory was 163.4MB in the beginning and 161.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 05:10:11,897 INFO L158 Benchmark]: RCFGBuilder took 333.84ms. Allocated memory is still 224.4MB. Free memory was 161.7MB in the beginning and 149.8MB in the end (delta: 11.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-21 05:10:11,897 INFO L158 Benchmark]: TraceAbstraction took 853886.63ms. Allocated memory was 224.4MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 149.1MB in the beginning and 746.9MB in the end (delta: -597.7MB). Peak memory consumption was 490.0MB. Max. memory is 8.0GB. [2023-12-21 05:10:11,898 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49ms. Allocated memory is still 182.5MB. Free memory was 137.5MB in the beginning and 137.4MB in the end (delta: 71.7kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 201.71ms. Allocated memory is still 224.4MB. Free memory was 176.0MB in the beginning and 165.3MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 26.61ms. Allocated memory is still 224.4MB. Free memory was 165.3MB in the beginning and 163.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.84ms. Allocated memory is still 224.4MB. Free memory was 163.4MB in the beginning and 161.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 333.84ms. Allocated memory is still 224.4MB. Free memory was 161.7MB in the beginning and 149.8MB in the end (delta: 11.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 853886.63ms. Allocated memory was 224.4MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 149.1MB in the beginning and 746.9MB in the end (delta: -597.7MB). Peak memory consumption was 490.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 7]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 7). Cancelled while NwaCegarLoop was constructing difference of abstraction (952states) and FLOYD_HOARE automaton (currently 253 states, 39 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDA2 was simplifying a ∧-13-1 term,while SimplifyDDA2 was simplifying 13 xjuncts wrt. a ATOM-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 853.8s, OverallIterations: 44, TraceHistogramMax: 17, PathProgramHistogramMax: 14, EmptinessCheckTime: 0.1s, AutomataDifference: 805.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 12909 SdHoareTripleChecker+Valid, 84.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12909 mSDsluCounter, 18886 SdHoareTripleChecker+Invalid, 78.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 17429 mSDsCounter, 9955 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 71551 IncrementalHoareTripleChecker+Invalid, 81506 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9955 mSolverCounterUnsat, 1457 mSDtfsCounter, 71551 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6479 GetRequests, 1949 SyntacticMatches, 192 SemanticMatches, 4337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733474 ImplicationChecksByTransitivity, 662.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=952occurred in iteration=43, InterpolantAutomatonStates: 3923, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 15.6s AutomataMinimizationTime, 43 MinimizatonAttempts, 15872 StatesRemovedByMinimization, 37 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 3.9s SatisfiabilityAnalysisTime, 19.0s InterpolantComputationTime, 2348 NumberOfCodeBlocks, 2329 NumberOfCodeBlocksAsserted, 145 NumberOfCheckSat, 3370 ConstructedInterpolants, 0 QuantifiedInterpolants, 14116 SizeOfPredicates, 28 NumberOfNonLiveVariables, 5040 ConjunctsInSsa, 1097 ConjunctsInUnsatCore, 122 InterpolantComputations, 6 PerfectInterpolantSequences, 3266/7982 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