/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-de52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 04:53:52,866 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 04:53:52,950 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 04:53:52,955 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 04:53:52,956 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 04:53:52,979 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 04:53:52,979 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 04:53:52,979 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 04:53:52,980 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 04:53:52,983 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 04:53:52,983 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 04:53:52,983 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 04:53:52,983 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 04:53:52,984 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 04:53:52,984 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 04:53:52,985 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 04:53:52,985 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 04:53:52,985 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 04:53:52,985 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 04:53:52,986 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 04:53:52,986 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 04:53:52,986 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 04:53:52,987 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 04:53:52,987 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 04:53:52,987 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 04:53:52,987 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 04:53:52,987 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 04:53:52,987 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 04:53:52,988 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 04:53:52,988 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 04:53:52,989 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 04:53:52,989 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 04:53:52,989 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 04:53:52,989 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 04:53:52,989 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 04:53:52,989 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 04:53:52,989 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 04:53:52,989 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 04:53:52,990 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 04:53:52,990 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 04:53:52,990 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 04:53:52,990 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 04:53:52,991 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 04:53:52,991 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 04:53:53,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 04:53:53,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 04:53:53,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 04:53:53,260 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 04:53:53,261 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 04:53:53,261 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de52.c [2023-12-21 04:53:54,348 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 04:53:54,492 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 04:53:54,493 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de52.c [2023-12-21 04:53:54,498 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f05fbc60/fedc593a69ea48fc8f308a1d22be91da/FLAG2ede379e4 [2023-12-21 04:53:54,510 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f05fbc60/fedc593a69ea48fc8f308a1d22be91da [2023-12-21 04:53:54,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 04:53:54,512 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 04:53:54,515 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 04:53:54,515 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 04:53:54,518 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 04:53:54,519 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:53:54" (1/1) ... [2023-12-21 04:53:54,519 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5defd7c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:53:54, skipping insertion in model container [2023-12-21 04:53:54,520 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:53:54" (1/1) ... [2023-12-21 04:53:54,535 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 04:53:54,636 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-de52.c[368,381] [2023-12-21 04:53:54,651 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 04:53:54,659 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 04:53:54,667 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-de52.c[368,381] [2023-12-21 04:53:54,669 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 04:53:54,679 INFO L206 MainTranslator]: Completed translation [2023-12-21 04:53:54,679 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:53:54 WrapperNode [2023-12-21 04:53:54,679 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 04:53:54,680 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 04:53:54,680 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 04:53:54,680 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 04:53:54,685 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:53:54" (1/1) ... [2023-12-21 04:53:54,691 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:53:54" (1/1) ... [2023-12-21 04:53:54,705 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2023-12-21 04:53:54,705 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 04:53:54,706 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 04:53:54,706 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 04:53:54,706 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 04:53:54,712 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:53:54" (1/1) ... [2023-12-21 04:53:54,712 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:53:54" (1/1) ... [2023-12-21 04:53:54,713 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:53:54" (1/1) ... [2023-12-21 04:53:54,725 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 04:53:54,725 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:53:54" (1/1) ... [2023-12-21 04:53:54,725 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:53:54" (1/1) ... [2023-12-21 04:53:54,727 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:53:54" (1/1) ... [2023-12-21 04:53:54,730 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:53:54" (1/1) ... [2023-12-21 04:53:54,730 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:53:54" (1/1) ... [2023-12-21 04:53:54,730 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:53:54" (1/1) ... [2023-12-21 04:53:54,733 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 04:53:54,733 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 04:53:54,733 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 04:53:54,733 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 04:53:54,734 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:53:54" (1/1) ... [2023-12-21 04:53:54,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 04:53:54,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:53:54,765 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 04:53:54,772 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 04:53:54,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 04:53:54,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 04:53:54,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 04:53:54,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 04:53:54,834 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 04:53:54,835 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 04:53:54,926 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 04:53:54,941 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 04:53:54,941 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-12-21 04:53:54,942 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:53:54 BoogieIcfgContainer [2023-12-21 04:53:54,942 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 04:53:54,943 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 04:53:54,943 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 04:53:54,945 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 04:53:54,945 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 04:53:54" (1/3) ... [2023-12-21 04:53:54,946 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2672524f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:53:54, skipping insertion in model container [2023-12-21 04:53:54,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:53:54" (2/3) ... [2023-12-21 04:53:54,946 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2672524f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:53:54, skipping insertion in model container [2023-12-21 04:53:54,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:53:54" (3/3) ... [2023-12-21 04:53:54,947 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de52.c [2023-12-21 04:53:54,959 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 04:53:54,959 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 04:53:54,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 04:53:55,003 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;@47eebdca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 04:53:55,003 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 04:53:55,012 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 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 04:53:55,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-21 04:53:55,018 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:53:55,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:53:55,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:53:55,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:53:55,023 INFO L85 PathProgramCache]: Analyzing trace with hash 577542875, now seen corresponding path program 1 times [2023-12-21 04:53:55,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:53:55,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330597538] [2023-12-21 04:53:55,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:53:55,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:53:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:53:55,118 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 04:53:55,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:53:55,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330597538] [2023-12-21 04:53:55,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330597538] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 04:53:55,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 04:53:55,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 04:53:55,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857897036] [2023-12-21 04:53:55,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:53:55,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-21 04:53:55,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:53:55,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-21 04:53:55,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 04:53:55,152 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 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 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:53:55,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:53:55,189 INFO L93 Difference]: Finished difference Result 24 states and 42 transitions. [2023-12-21 04:53:55,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-21 04:53:55,191 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-21 04:53:55,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:53:55,195 INFO L225 Difference]: With dead ends: 24 [2023-12-21 04:53:55,195 INFO L226 Difference]: Without dead ends: 11 [2023-12-21 04:53:55,197 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 04:53:55,199 INFO L413 NwaCegarLoop]: 15 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, 15 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 04:53:55,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:53:55,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-12-21 04:53:55,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-12-21 04:53:55,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 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 04:53:55,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2023-12-21 04:53:55,223 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 10 [2023-12-21 04:53:55,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:53:55,223 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2023-12-21 04:53:55,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:53:55,224 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2023-12-21 04:53:55,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-21 04:53:55,224 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:53:55,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:53:55,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-21 04:53:55,225 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:53:55,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:53:55,225 INFO L85 PathProgramCache]: Analyzing trace with hash 573848791, now seen corresponding path program 1 times [2023-12-21 04:53:55,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:53:55,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627393039] [2023-12-21 04:53:55,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:53:55,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:53:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:53:55,433 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 04:53:55,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:53:55,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627393039] [2023-12-21 04:53:55,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627393039] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 04:53:55,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 04:53:55,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 04:53:55,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548857015] [2023-12-21 04:53:55,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:53:55,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 04:53:55,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:53:55,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 04:53:55,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 04:53:55,437 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:53:55,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:53:55,478 INFO L93 Difference]: Finished difference Result 26 states and 37 transitions. [2023-12-21 04:53:55,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 04:53:55,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-21 04:53:55,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:53:55,479 INFO L225 Difference]: With dead ends: 26 [2023-12-21 04:53:55,479 INFO L226 Difference]: Without dead ends: 17 [2023-12-21 04:53:55,479 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 04:53:55,480 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:53:55,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 22 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:53:55,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-21 04:53:55,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-21 04:53:55,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:53:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 24 transitions. [2023-12-21 04:53:55,486 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 24 transitions. Word has length 10 [2023-12-21 04:53:55,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:53:55,486 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 24 transitions. [2023-12-21 04:53:55,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:53:55,486 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 24 transitions. [2023-12-21 04:53:55,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-21 04:53:55,486 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:53:55,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:53:55,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-21 04:53:55,487 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:53:55,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:53:55,487 INFO L85 PathProgramCache]: Analyzing trace with hash 611108754, now seen corresponding path program 1 times [2023-12-21 04:53:55,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:53:55,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615186719] [2023-12-21 04:53:55,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:53:55,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:53:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:53:55,514 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 04:53:55,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:53:55,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615186719] [2023-12-21 04:53:55,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615186719] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 04:53:55,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 04:53:55,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 04:53:55,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105175570] [2023-12-21 04:53:55,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:53:55,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 04:53:55,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:53:55,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 04:53:55,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 04:53:55,516 INFO L87 Difference]: Start difference. First operand 17 states and 24 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 04:53:55,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:53:55,534 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2023-12-21 04:53:55,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 04:53:55,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 04:53:55,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:53:55,535 INFO L225 Difference]: With dead ends: 27 [2023-12-21 04:53:55,535 INFO L226 Difference]: Without dead ends: 21 [2023-12-21 04:53:55,535 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 04:53:55,536 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 17 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 04:53:55,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 17 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:53:55,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-21 04:53:55,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-21 04:53:55,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 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 04:53:55,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 30 transitions. [2023-12-21 04:53:55,543 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 30 transitions. Word has length 11 [2023-12-21 04:53:55,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:53:55,544 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 30 transitions. [2023-12-21 04:53:55,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 04:53:55,544 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 30 transitions. [2023-12-21 04:53:55,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-21 04:53:55,544 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:53:55,544 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:53:55,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-21 04:53:55,545 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:53:55,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:53:55,545 INFO L85 PathProgramCache]: Analyzing trace with hash 656361283, now seen corresponding path program 1 times [2023-12-21 04:53:55,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:53:55,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835505354] [2023-12-21 04:53:55,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:53:55,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:53:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:53:55,569 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 04:53:55,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:53:55,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835505354] [2023-12-21 04:53:55,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835505354] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 04:53:55,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 04:53:55,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 04:53:55,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976190177] [2023-12-21 04:53:55,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:53:55,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 04:53:55,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:53:55,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 04:53:55,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 04:53:55,571 INFO L87 Difference]: Start difference. First operand 21 states and 30 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 04:53:55,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:53:55,587 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions. [2023-12-21 04:53:55,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 04:53:55,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 04:53:55,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:53:55,588 INFO L225 Difference]: With dead ends: 36 [2023-12-21 04:53:55,588 INFO L226 Difference]: Without dead ends: 26 [2023-12-21 04:53:55,588 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 04:53:55,589 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:53:55,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 16 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:53:55,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-21 04:53:55,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-21 04:53:55,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.48) internal successors, (37), 25 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 04:53:55,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2023-12-21 04:53:55,597 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 11 [2023-12-21 04:53:55,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:53:55,597 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2023-12-21 04:53:55,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 04:53:55,597 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2023-12-21 04:53:55,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-21 04:53:55,598 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:53:55,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:53:55,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-21 04:53:55,598 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:53:55,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:53:55,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1044350857, now seen corresponding path program 1 times [2023-12-21 04:53:55,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:53:55,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348077444] [2023-12-21 04:53:55,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:53:55,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:53:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:53:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 04:53:55,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:53:55,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348077444] [2023-12-21 04:53:55,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348077444] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 04:53:55,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 04:53:55,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 04:53:55,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539272264] [2023-12-21 04:53:55,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:53:55,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 04:53:55,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:53:55,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 04:53:55,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 04:53:55,693 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand has 4 states, 4 states have (on average 3.0) 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 04:53:55,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:53:55,737 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2023-12-21 04:53:55,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 04:53:55,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) 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 04:53:55,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:53:55,737 INFO L225 Difference]: With dead ends: 33 [2023-12-21 04:53:55,737 INFO L226 Difference]: Without dead ends: 22 [2023-12-21 04:53:55,738 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 04:53:55,739 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 26 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 04:53:55,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 26 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:53:55,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-21 04:53:55,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-21 04:53:55,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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 04:53:55,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2023-12-21 04:53:55,744 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 12 [2023-12-21 04:53:55,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:53:55,745 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2023-12-21 04:53:55,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) 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 04:53:55,745 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2023-12-21 04:53:55,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-21 04:53:55,745 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:53:55,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:53:55,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-21 04:53:55,746 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:53:55,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:53:55,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1846839420, now seen corresponding path program 1 times [2023-12-21 04:53:55,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:53:55,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001604437] [2023-12-21 04:53:55,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:53:55,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:53:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:53:55,836 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 04:53:55,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:53:55,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001604437] [2023-12-21 04:53:55,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001604437] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:53:55,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106331688] [2023-12-21 04:53:55,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:53:55,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:53:55,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:53:55,850 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 04:53:55,851 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 04:53:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:53:55,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-21 04:53:55,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:53:55,923 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 04:53:55,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:53:55,947 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 04:53:55,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106331688] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 04:53:55,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-21 04:53:55,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-12-21 04:53:55,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712019824] [2023-12-21 04:53:55,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:53:55,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 04:53:55,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:53:55,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 04:53:55,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-12-21 04:53:55,949 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 04:53:55,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:53:55,971 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2023-12-21 04:53:55,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 04:53:55,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-21 04:53:55,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:53:55,972 INFO L225 Difference]: With dead ends: 28 [2023-12-21 04:53:55,972 INFO L226 Difference]: Without dead ends: 19 [2023-12-21 04:53:55,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 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 04:53:55,973 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:53:55,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 20 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:53:55,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-21 04:53:55,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-12-21 04:53:55,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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 04:53:55,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2023-12-21 04:53:55,977 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 13 [2023-12-21 04:53:55,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:53:55,977 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2023-12-21 04:53:55,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 04:53:55,978 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2023-12-21 04:53:55,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-21 04:53:55,978 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:53:55,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:53:55,986 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 04:53:56,183 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 04:53:56,183 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:53:56,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:53:56,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1991740900, now seen corresponding path program 1 times [2023-12-21 04:53:56,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:53:56,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771739808] [2023-12-21 04:53:56,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:53:56,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:53:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:53:56,233 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 04:53:56,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:53:56,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771739808] [2023-12-21 04:53:56,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771739808] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:53:56,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704883623] [2023-12-21 04:53:56,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:53:56,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:53:56,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:53:56,235 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 04:53:56,280 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 04:53:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:53:56,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-21 04:53:56,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:53:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 04:53:56,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:53:56,348 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 04:53:56,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704883623] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 04:53:56,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-21 04:53:56,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4] total 8 [2023-12-21 04:53:56,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013410409] [2023-12-21 04:53:56,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:53:56,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 04:53:56,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:53:56,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 04:53:56,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-12-21 04:53:56,351 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 04:53:56,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:53:56,376 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2023-12-21 04:53:56,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 04:53:56,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-21 04:53:56,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:53:56,378 INFO L225 Difference]: With dead ends: 23 [2023-12-21 04:53:56,379 INFO L226 Difference]: Without dead ends: 16 [2023-12-21 04:53:56,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-12-21 04:53:56,380 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:53:56,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:53:56,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-12-21 04:53:56,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-12-21 04:53:56,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:53:56,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2023-12-21 04:53:56,394 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 13 [2023-12-21 04:53:56,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:53:56,394 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2023-12-21 04:53:56,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 04:53:56,394 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2023-12-21 04:53:56,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-21 04:53:56,394 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:53:56,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:53:56,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-21 04:53:56,599 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 04:53:56,599 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:53:56,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:53:56,600 INFO L85 PathProgramCache]: Analyzing trace with hash -2140868714, now seen corresponding path program 1 times [2023-12-21 04:53:56,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:53:56,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6951676] [2023-12-21 04:53:56,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:53:56,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:53:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:53:56,654 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 04:53:56,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:53:56,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6951676] [2023-12-21 04:53:56,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6951676] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:53:56,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594351801] [2023-12-21 04:53:56,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:53:56,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:53:56,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:53:56,670 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 04:53:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:53:56,709 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 04:53:56,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 04:53:56,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:53:56,743 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 04:53:56,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:53:56,771 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 04:53:56,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594351801] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:53:56,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:53:56,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-12-21 04:53:56,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008093268] [2023-12-21 04:53:56,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:53:56,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 04:53:56,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:53:56,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 04:53:56,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 04:53:56,772 INFO L87 Difference]: Start difference. First operand 16 states and 21 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 04:53:56,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:53:56,797 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2023-12-21 04:53:56,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 04:53:56,798 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 04:53:56,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:53:56,798 INFO L225 Difference]: With dead ends: 26 [2023-12-21 04:53:56,798 INFO L226 Difference]: Without dead ends: 20 [2023-12-21 04:53:56,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 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 04:53:56,799 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:53:56,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 22 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:53:56,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-21 04:53:56,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-21 04:53:56,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 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 04:53:56,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2023-12-21 04:53:56,803 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 14 [2023-12-21 04:53:56,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:53:56,804 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2023-12-21 04:53:56,804 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 04:53:56,804 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2023-12-21 04:53:56,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-21 04:53:56,804 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:53:56,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:53:56,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-21 04:53:57,009 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 04:53:57,009 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:53:57,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:53:57,010 INFO L85 PathProgramCache]: Analyzing trace with hash -2095616185, now seen corresponding path program 1 times [2023-12-21 04:53:57,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:53:57,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764131976] [2023-12-21 04:53:57,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:53:57,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:53:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:53:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 04:53:57,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:53:57,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764131976] [2023-12-21 04:53:57,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764131976] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:53:57,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319526916] [2023-12-21 04:53:57,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:53:57,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:53:57,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:53:57,093 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 04:53:57,112 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 04:53:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:53:57,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-21 04:53:57,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:53:57,165 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 04:53:57,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:53:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 04:53:57,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319526916] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:53:57,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:53:57,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 15 [2023-12-21 04:53:57,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507547358] [2023-12-21 04:53:57,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:53:57,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-21 04:53:57,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:53:57,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-21 04:53:57,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-12-21 04:53:57,249 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:53:57,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:53:57,432 INFO L93 Difference]: Finished difference Result 65 states and 91 transitions. [2023-12-21 04:53:57,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-21 04:53:57,432 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-21 04:53:57,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:53:57,435 INFO L225 Difference]: With dead ends: 65 [2023-12-21 04:53:57,435 INFO L226 Difference]: Without dead ends: 48 [2023-12-21 04:53:57,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2023-12-21 04:53:57,437 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 04:53:57,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 66 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 04:53:57,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-21 04:53:57,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2023-12-21 04:53:57,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 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 04:53:57,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2023-12-21 04:53:57,452 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 14 [2023-12-21 04:53:57,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:53:57,452 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2023-12-21 04:53:57,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:53:57,452 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2023-12-21 04:53:57,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-21 04:53:57,453 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:53:57,453 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:53:57,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-21 04:53:57,657 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 04:53:57,658 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:53:57,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:53:57,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1908629782, now seen corresponding path program 1 times [2023-12-21 04:53:57,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:53:57,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847940895] [2023-12-21 04:53:57,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:53:57,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:53:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:53:57,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 04:53:57,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:53:57,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847940895] [2023-12-21 04:53:57,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847940895] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:53:57,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203096908] [2023-12-21 04:53:57,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:53:57,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:53:57,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:53:57,745 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 04:53:57,747 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 04:53:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:53:57,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 04:53:57,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:53:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 04:53:57,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:53:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 04:53:57,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203096908] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:53:57,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:53:57,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-12-21 04:53:57,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098742049] [2023-12-21 04:53:57,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:53:57,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 04:53:57,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:53:57,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 04:53:57,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 04:53:57,830 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:53:57,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:53:57,850 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2023-12-21 04:53:57,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 04:53:57,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-21 04:53:57,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:53:57,851 INFO L225 Difference]: With dead ends: 45 [2023-12-21 04:53:57,851 INFO L226 Difference]: Without dead ends: 27 [2023-12-21 04:53:57,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 5 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 04:53:57,852 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:53:57,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 23 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:53:57,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-21 04:53:57,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-12-21 04:53:57,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 04:53:57,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2023-12-21 04:53:57,862 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 16 [2023-12-21 04:53:57,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:53:57,862 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2023-12-21 04:53:57,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:53:57,862 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2023-12-21 04:53:57,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-21 04:53:57,862 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:53:57,862 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:53:57,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-21 04:53:58,067 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 04:53:58,067 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:53:58,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:53:58,069 INFO L85 PathProgramCache]: Analyzing trace with hash -44680555, now seen corresponding path program 2 times [2023-12-21 04:53:58,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:53:58,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488218517] [2023-12-21 04:53:58,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:53:58,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:53:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:53:58,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 04:53:58,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:53:58,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488218517] [2023-12-21 04:53:58,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488218517] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:53:58,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488896445] [2023-12-21 04:53:58,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:53:58,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:53:58,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:53:58,160 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 04:53:58,208 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 04:53:58,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:53:58,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:53:58,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-21 04:53:58,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:53:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 04:53:58,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:53:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 04:53:58,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488896445] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:53:58,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:53:58,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 14 [2023-12-21 04:53:58,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756404448] [2023-12-21 04:53:58,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:53:58,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-21 04:53:58,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:53:58,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-21 04:53:58,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-12-21 04:53:58,336 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 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 04:53:58,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:53:58,510 INFO L93 Difference]: Finished difference Result 83 states and 114 transitions. [2023-12-21 04:53:58,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-21 04:53:58,511 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 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 16 [2023-12-21 04:53:58,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:53:58,511 INFO L225 Difference]: With dead ends: 83 [2023-12-21 04:53:58,511 INFO L226 Difference]: Without dead ends: 60 [2023-12-21 04:53:58,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-12-21 04:53:58,512 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 04:53:58,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 128 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 04:53:58,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-21 04:53:58,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 43. [2023-12-21 04:53:58,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:53:58,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 62 transitions. [2023-12-21 04:53:58,522 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 62 transitions. Word has length 16 [2023-12-21 04:53:58,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:53:58,523 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 62 transitions. [2023-12-21 04:53:58,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 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 04:53:58,523 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 62 transitions. [2023-12-21 04:53:58,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-21 04:53:58,523 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:53:58,523 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:53:58,539 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 04:53:58,728 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 04:53:58,728 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:53:58,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:53:58,729 INFO L85 PathProgramCache]: Analyzing trace with hash -983462638, now seen corresponding path program 2 times [2023-12-21 04:53:58,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:53:58,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36216931] [2023-12-21 04:53:58,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:53:58,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:53:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:53:58,796 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 04:53:58,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:53:58,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36216931] [2023-12-21 04:53:58,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36216931] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:53:58,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700501369] [2023-12-21 04:53:58,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:53:58,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:53:58,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:53:58,809 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 04:53:58,810 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 04:53:58,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:53:58,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:53:58,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-21 04:53:58,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:53:58,881 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 04:53:58,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:53:58,927 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 04:53:58,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700501369] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:53:58,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:53:58,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2023-12-21 04:53:58,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390962586] [2023-12-21 04:53:58,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:53:58,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-21 04:53:58,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:53:58,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-21 04:53:58,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-12-21 04:53:58,928 INFO L87 Difference]: Start difference. First operand 43 states and 62 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 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 04:53:59,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:53:59,218 INFO L93 Difference]: Finished difference Result 76 states and 111 transitions. [2023-12-21 04:53:59,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-21 04:53:59,219 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 04:53:59,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:53:59,219 INFO L225 Difference]: With dead ends: 76 [2023-12-21 04:53:59,219 INFO L226 Difference]: Without dead ends: 56 [2023-12-21 04:53:59,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2023-12-21 04:53:59,220 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 04:53:59,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 54 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 04:53:59,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-12-21 04:53:59,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2023-12-21 04:53:59,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:53:59,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 68 transitions. [2023-12-21 04:53:59,234 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 68 transitions. Word has length 17 [2023-12-21 04:53:59,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:53:59,234 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 68 transitions. [2023-12-21 04:53:59,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 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 04:53:59,234 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 68 transitions. [2023-12-21 04:53:59,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-21 04:53:59,234 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:53:59,235 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:53:59,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-21 04:53:59,439 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 04:53:59,440 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:53:59,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:53:59,440 INFO L85 PathProgramCache]: Analyzing trace with hash 179882055, now seen corresponding path program 3 times [2023-12-21 04:53:59,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:53:59,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980742696] [2023-12-21 04:53:59,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:53:59,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:53:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:53:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 04:53:59,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:53:59,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980742696] [2023-12-21 04:53:59,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980742696] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:53:59,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753422882] [2023-12-21 04:53:59,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 04:53:59,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:53:59,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:53:59,510 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 04:53:59,511 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 04:53:59,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-21 04:53:59,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:53:59,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-21 04:53:59,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:53:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 04:53:59,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:53:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 04:53:59,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753422882] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:53:59,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:53:59,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 19 [2023-12-21 04:53:59,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731994823] [2023-12-21 04:53:59,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:53:59,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-21 04:53:59,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:53:59,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-21 04:53:59,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-12-21 04:53:59,727 INFO L87 Difference]: Start difference. First operand 50 states and 68 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 04:54:00,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:54:00,576 INFO L93 Difference]: Finished difference Result 136 states and 188 transitions. [2023-12-21 04:54:00,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-12-21 04:54:00,577 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 18 [2023-12-21 04:54:00,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:54:00,577 INFO L225 Difference]: With dead ends: 136 [2023-12-21 04:54:00,577 INFO L226 Difference]: Without dead ends: 97 [2023-12-21 04:54:00,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=443, Invalid=2107, Unknown=0, NotChecked=0, Total=2550 [2023-12-21 04:54:00,578 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 82 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 04:54:00,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 167 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 04:54:00,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-12-21 04:54:00,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 67. [2023-12-21 04:54:00,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4242424242424243) internal successors, (94), 66 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:54:00,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 94 transitions. [2023-12-21 04:54:00,601 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 94 transitions. Word has length 18 [2023-12-21 04:54:00,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:54:00,601 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 94 transitions. [2023-12-21 04:54:00,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 04:54:00,601 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 94 transitions. [2023-12-21 04:54:00,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-21 04:54:00,601 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:54:00,602 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:54:00,618 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 04:54:00,806 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 04:54:00,806 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:54:00,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:54:00,807 INFO L85 PathProgramCache]: Analyzing trace with hash 376510755, now seen corresponding path program 4 times [2023-12-21 04:54:00,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:54:00,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323805022] [2023-12-21 04:54:00,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:54:00,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:54:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:54:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 04:54:00,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:54:00,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323805022] [2023-12-21 04:54:00,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323805022] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:54:00,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275127293] [2023-12-21 04:54:00,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 04:54:00,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:54:00,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:54:00,896 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 04:54:00,913 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 04:54:00,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 04:54:00,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:54:00,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-21 04:54:00,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:54:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 04:54:00,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:54:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 04:54:00,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275127293] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:54:00,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:54:00,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-12-21 04:54:00,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119612648] [2023-12-21 04:54:00,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:54:00,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 04:54:00,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:54:00,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 04:54:00,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 04:54:00,998 INFO L87 Difference]: Start difference. First operand 67 states and 94 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 04:54:01,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:54:01,055 INFO L93 Difference]: Finished difference Result 81 states and 111 transitions. [2023-12-21 04:54:01,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-21 04:54:01,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-21 04:54:01,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:54:01,056 INFO L225 Difference]: With dead ends: 81 [2023-12-21 04:54:01,056 INFO L226 Difference]: Without dead ends: 69 [2023-12-21 04:54:01,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-21 04:54:01,056 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:54:01,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 26 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:54:01,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-21 04:54:01,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-12-21 04:54:01,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.3970588235294117) internal successors, (95), 68 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 04:54:01,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 95 transitions. [2023-12-21 04:54:01,077 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 95 transitions. Word has length 19 [2023-12-21 04:54:01,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:54:01,077 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 95 transitions. [2023-12-21 04:54:01,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 04:54:01,078 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 95 transitions. [2023-12-21 04:54:01,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-21 04:54:01,078 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:54:01,078 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:54:01,096 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 04:54:01,282 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 04:54:01,283 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:54:01,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:54:01,283 INFO L85 PathProgramCache]: Analyzing trace with hash -867982685, now seen corresponding path program 3 times [2023-12-21 04:54:01,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:54:01,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636165803] [2023-12-21 04:54:01,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:54:01,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:54:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:54:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 04:54:01,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:54:01,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636165803] [2023-12-21 04:54:01,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636165803] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:54:01,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42733184] [2023-12-21 04:54:01,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 04:54:01,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:54:01,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:54:01,365 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 04:54:01,368 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 04:54:01,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-21 04:54:01,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:54:01,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-21 04:54:01,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:54:01,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 04:54:01,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:54:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 04:54:01,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42733184] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:54:01,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:54:01,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2023-12-21 04:54:01,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345678700] [2023-12-21 04:54:01,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:54:01,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-21 04:54:01,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:54:01,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-21 04:54:01,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-12-21 04:54:01,547 INFO L87 Difference]: Start difference. First operand 69 states and 95 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 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 04:54:02,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:54:02,240 INFO L93 Difference]: Finished difference Result 163 states and 227 transitions. [2023-12-21 04:54:02,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-21 04:54:02,241 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-21 04:54:02,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:54:02,241 INFO L225 Difference]: With dead ends: 163 [2023-12-21 04:54:02,241 INFO L226 Difference]: Without dead ends: 135 [2023-12-21 04:54:02,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=1563, Unknown=0, NotChecked=0, Total=1806 [2023-12-21 04:54:02,242 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 134 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 04:54:02,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 166 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 04:54:02,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-12-21 04:54:02,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2023-12-21 04:54:02,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.3516483516483517) internal successors, (123), 91 states have internal predecessors, (123), 0 states have call successors, (0), 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 04:54:02,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 123 transitions. [2023-12-21 04:54:02,267 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 123 transitions. Word has length 19 [2023-12-21 04:54:02,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:54:02,267 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 123 transitions. [2023-12-21 04:54:02,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 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 04:54:02,267 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 123 transitions. [2023-12-21 04:54:02,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-21 04:54:02,268 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:54:02,268 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:54:02,273 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 04:54:02,472 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 04:54:02,473 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:54:02,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:54:02,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1184261561, now seen corresponding path program 2 times [2023-12-21 04:54:02,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:54:02,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398985520] [2023-12-21 04:54:02,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:54:02,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:54:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:54:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 04:54:02,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:54:02,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398985520] [2023-12-21 04:54:02,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398985520] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:54:02,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216121049] [2023-12-21 04:54:02,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:54:02,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:54:02,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:54:02,614 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 04:54:02,616 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 04:54:02,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:54:02,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:54:02,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-21 04:54:02,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:54:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 04:54:02,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:54:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 04:54:02,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216121049] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:54:02,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:54:02,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2023-12-21 04:54:02,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930434911] [2023-12-21 04:54:02,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:54:02,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-21 04:54:02,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:54:02,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-21 04:54:02,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2023-12-21 04:54:02,780 INFO L87 Difference]: Start difference. First operand 92 states and 123 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:54:03,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:54:03,591 INFO L93 Difference]: Finished difference Result 132 states and 180 transitions. [2023-12-21 04:54:03,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-21 04:54:03,591 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-21 04:54:03,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:54:03,592 INFO L225 Difference]: With dead ends: 132 [2023-12-21 04:54:03,592 INFO L226 Difference]: Without dead ends: 106 [2023-12-21 04:54:03,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=372, Invalid=2708, Unknown=0, NotChecked=0, Total=3080 [2023-12-21 04:54:03,593 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 102 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 04:54:03,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 29 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 04:54:03,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-12-21 04:54:03,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 81. [2023-12-21 04:54:03,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.3125) internal successors, (105), 80 states have internal predecessors, (105), 0 states have call successors, (0), 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 04:54:03,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 105 transitions. [2023-12-21 04:54:03,612 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 105 transitions. Word has length 20 [2023-12-21 04:54:03,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:54:03,612 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 105 transitions. [2023-12-21 04:54:03,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:54:03,612 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 105 transitions. [2023-12-21 04:54:03,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-21 04:54:03,613 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:54:03,613 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:54:03,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-21 04:54:03,817 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 04:54:03,817 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:54:03,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:54:03,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1139243939, now seen corresponding path program 5 times [2023-12-21 04:54:03,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:54:03,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821716139] [2023-12-21 04:54:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:54:03,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:54:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:54:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 04:54:03,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:54:03,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821716139] [2023-12-21 04:54:03,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821716139] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:54:03,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449217557] [2023-12-21 04:54:03,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 04:54:03,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:54:03,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:54:03,919 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 04:54:03,960 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 04:54:03,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-21 04:54:03,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:54:03,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-21 04:54:03,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:54:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 04:54:03,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:54:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 04:54:04,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449217557] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:54:04,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:54:04,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-12-21 04:54:04,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146415764] [2023-12-21 04:54:04,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:54:04,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 04:54:04,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:54:04,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 04:54:04,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 04:54:04,025 INFO L87 Difference]: Start difference. First operand 81 states and 105 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:54:04,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:54:04,067 INFO L93 Difference]: Finished difference Result 103 states and 134 transitions. [2023-12-21 04:54:04,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 04:54:04,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-12-21 04:54:04,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:54:04,068 INFO L225 Difference]: With dead ends: 103 [2023-12-21 04:54:04,068 INFO L226 Difference]: Without dead ends: 79 [2023-12-21 04:54:04,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 04:54:04,070 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:54:04,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 32 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:54:04,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-21 04:54:04,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-12-21 04:54:04,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.3205128205128205) internal successors, (103), 78 states have internal predecessors, (103), 0 states have call successors, (0), 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 04:54:04,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2023-12-21 04:54:04,091 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 21 [2023-12-21 04:54:04,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:54:04,091 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2023-12-21 04:54:04,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:54:04,091 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2023-12-21 04:54:04,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-21 04:54:04,092 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:54:04,092 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:54:04,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-21 04:54:04,297 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 04:54:04,297 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:54:04,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:54:04,297 INFO L85 PathProgramCache]: Analyzing trace with hash -134959996, now seen corresponding path program 6 times [2023-12-21 04:54:04,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:54:04,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446257458] [2023-12-21 04:54:04,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:54:04,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:54:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:54:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 04:54:04,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:54:04,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446257458] [2023-12-21 04:54:04,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446257458] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:54:04,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312116710] [2023-12-21 04:54:04,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 04:54:04,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:54:04,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:54:04,410 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 04:54:04,434 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 04:54:04,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-12-21 04:54:04,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:54:04,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-21 04:54:04,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:54:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-21 04:54:04,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:54:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-21 04:54:04,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312116710] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:54:04,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:54:04,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 17 [2023-12-21 04:54:04,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617345720] [2023-12-21 04:54:04,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:54:04,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-21 04:54:04,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:54:04,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-21 04:54:04,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-12-21 04:54:04,554 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:54:04,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:54:04,922 INFO L93 Difference]: Finished difference Result 205 states and 269 transitions. [2023-12-21 04:54:04,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-21 04:54:04,922 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-12-21 04:54:04,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:54:04,923 INFO L225 Difference]: With dead ends: 205 [2023-12-21 04:54:04,923 INFO L226 Difference]: Without dead ends: 172 [2023-12-21 04:54:04,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2023-12-21 04:54:04,924 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 138 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 04:54:04,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 305 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 04:54:04,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-12-21 04:54:04,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 82. [2023-12-21 04:54:04,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.271604938271605) internal successors, (103), 81 states have internal predecessors, (103), 0 states have call successors, (0), 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 04:54:04,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 103 transitions. [2023-12-21 04:54:04,943 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 103 transitions. Word has length 21 [2023-12-21 04:54:04,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:54:04,943 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 103 transitions. [2023-12-21 04:54:04,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:54:04,944 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 103 transitions. [2023-12-21 04:54:04,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-21 04:54:04,944 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:54:04,944 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:54:04,948 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 04:54:05,148 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 04:54:05,148 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:54:05,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:54:05,148 INFO L85 PathProgramCache]: Analyzing trace with hash -684296169, now seen corresponding path program 3 times [2023-12-21 04:54:05,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:54:05,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579993542] [2023-12-21 04:54:05,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:54:05,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:54:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:54:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 04:54:05,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:54:05,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579993542] [2023-12-21 04:54:05,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579993542] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:54:05,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527401491] [2023-12-21 04:54:05,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 04:54:05,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:54:05,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:54:05,264 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 04:54:05,266 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 04:54:05,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-21 04:54:05,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:54:05,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-21 04:54:05,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:54:05,393 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-21 04:54:05,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:54:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-21 04:54:05,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527401491] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:54:05,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:54:05,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 26 [2023-12-21 04:54:05,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863712495] [2023-12-21 04:54:05,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:54:05,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-21 04:54:05,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:54:05,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-21 04:54:05,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2023-12-21 04:54:05,568 INFO L87 Difference]: Start difference. First operand 82 states and 103 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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 04:54:07,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:54:07,329 INFO L93 Difference]: Finished difference Result 226 states and 302 transitions. [2023-12-21 04:54:07,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-12-21 04:54:07,330 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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 22 [2023-12-21 04:54:07,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:54:07,330 INFO L225 Difference]: With dead ends: 226 [2023-12-21 04:54:07,331 INFO L226 Difference]: Without dead ends: 185 [2023-12-21 04:54:07,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=767, Invalid=5395, Unknown=0, NotChecked=0, Total=6162 [2023-12-21 04:54:07,333 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 129 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-21 04:54:07,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 480 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 1511 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-21 04:54:07,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-12-21 04:54:07,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 106. [2023-12-21 04:54:07,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.380952380952381) internal successors, (145), 105 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:54:07,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 145 transitions. [2023-12-21 04:54:07,359 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 145 transitions. Word has length 22 [2023-12-21 04:54:07,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:54:07,359 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 145 transitions. [2023-12-21 04:54:07,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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 04:54:07,359 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 145 transitions. [2023-12-21 04:54:07,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-21 04:54:07,360 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:54:07,360 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:54:07,380 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 04:54:07,564 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 04:54:07,565 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:54:07,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:54:07,565 INFO L85 PathProgramCache]: Analyzing trace with hash 732123794, now seen corresponding path program 4 times [2023-12-21 04:54:07,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:54:07,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155702903] [2023-12-21 04:54:07,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:54:07,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:54:07,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:54:07,694 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 04:54:07,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:54:07,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155702903] [2023-12-21 04:54:07,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155702903] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:54:07,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213765116] [2023-12-21 04:54:07,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 04:54:07,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:54:07,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:54:07,696 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 04:54:07,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-21 04:54:07,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 04:54:07,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:54:07,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-21 04:54:07,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:54:07,806 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 04:54:07,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:54:07,911 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 04:54:07,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213765116] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:54:07,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:54:07,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2023-12-21 04:54:07,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208008003] [2023-12-21 04:54:07,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:54:07,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-21 04:54:07,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:54:07,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-21 04:54:07,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2023-12-21 04:54:07,913 INFO L87 Difference]: Start difference. First operand 106 states and 145 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 04:54:09,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:54:09,566 INFO L93 Difference]: Finished difference Result 211 states and 309 transitions. [2023-12-21 04:54:09,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-12-21 04:54:09,566 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-21 04:54:09,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:54:09,568 INFO L225 Difference]: With dead ends: 211 [2023-12-21 04:54:09,568 INFO L226 Difference]: Without dead ends: 180 [2023-12-21 04:54:09,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 36 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=572, Invalid=4398, Unknown=0, NotChecked=0, Total=4970 [2023-12-21 04:54:09,574 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 176 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 04:54:09,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 73 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 04:54:09,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-12-21 04:54:09,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 135. [2023-12-21 04:54:09,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.3582089552238805) internal successors, (182), 134 states have internal predecessors, (182), 0 states have call successors, (0), 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 04:54:09,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 182 transitions. [2023-12-21 04:54:09,608 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 182 transitions. Word has length 23 [2023-12-21 04:54:09,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:54:09,608 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 182 transitions. [2023-12-21 04:54:09,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 04:54:09,609 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 182 transitions. [2023-12-21 04:54:09,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-21 04:54:09,609 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:54:09,609 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:54:09,617 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 04:54:09,817 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 04:54:09,817 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:54:09,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:54:09,818 INFO L85 PathProgramCache]: Analyzing trace with hash 752963510, now seen corresponding path program 7 times [2023-12-21 04:54:09,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:54:09,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897481458] [2023-12-21 04:54:09,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:54:09,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:54:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:54:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 04:54:09,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:54:09,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897481458] [2023-12-21 04:54:09,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897481458] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:54:09,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281557208] [2023-12-21 04:54:09,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 04:54:09,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:54:09,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:54:09,934 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 04:54:09,964 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 04:54:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:54:09,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-21 04:54:09,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:54:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 04:54:10,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:54:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 04:54:10,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281557208] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:54:10,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:54:10,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2023-12-21 04:54:10,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889849091] [2023-12-21 04:54:10,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:54:10,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 04:54:10,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:54:10,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 04:54:10,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-21 04:54:10,071 INFO L87 Difference]: Start difference. First operand 135 states and 182 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 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 04:54:10,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:54:10,163 INFO L93 Difference]: Finished difference Result 150 states and 201 transitions. [2023-12-21 04:54:10,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 04:54:10,163 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 04:54:10,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:54:10,164 INFO L225 Difference]: With dead ends: 150 [2023-12-21 04:54:10,164 INFO L226 Difference]: Without dead ends: 137 [2023-12-21 04:54:10,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-12-21 04:54:10,165 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:54:10,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 40 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:54:10,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-12-21 04:54:10,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2023-12-21 04:54:10,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.3455882352941178) internal successors, (183), 136 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:54:10,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 183 transitions. [2023-12-21 04:54:10,202 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 183 transitions. Word has length 24 [2023-12-21 04:54:10,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:54:10,203 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 183 transitions. [2023-12-21 04:54:10,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 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 04:54:10,203 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 183 transitions. [2023-12-21 04:54:10,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-21 04:54:10,203 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:54:10,203 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:54:10,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-21 04:54:10,420 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 04:54:10,422 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:54:10,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:54:10,422 INFO L85 PathProgramCache]: Analyzing trace with hash 677068581, now seen corresponding path program 4 times [2023-12-21 04:54:10,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:54:10,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078847149] [2023-12-21 04:54:10,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:54:10,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:54:10,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:54:10,538 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 04:54:10,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:54:10,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078847149] [2023-12-21 04:54:10,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078847149] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:54:10,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834312137] [2023-12-21 04:54:10,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 04:54:10,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:54:10,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:54:10,539 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 04:54:10,592 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 04:54:10,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 04:54:10,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:54:10,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-21 04:54:10,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:54:10,643 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 04:54:10,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:54:10,737 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-21 04:54:10,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834312137] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:54:10,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:54:10,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 8] total 22 [2023-12-21 04:54:10,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569268235] [2023-12-21 04:54:10,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:54:10,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-21 04:54:10,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:54:10,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-21 04:54:10,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2023-12-21 04:54:10,738 INFO L87 Difference]: Start difference. First operand 137 states and 183 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:54:11,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:54:11,633 INFO L93 Difference]: Finished difference Result 309 states and 408 transitions. [2023-12-21 04:54:11,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-21 04:54:11,633 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-21 04:54:11,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:54:11,635 INFO L225 Difference]: With dead ends: 309 [2023-12-21 04:54:11,635 INFO L226 Difference]: Without dead ends: 243 [2023-12-21 04:54:11,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=318, Invalid=2438, Unknown=0, NotChecked=0, Total=2756 [2023-12-21 04:54:11,637 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 117 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 04:54:11,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 501 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 04:54:11,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-12-21 04:54:11,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 146. [2023-12-21 04:54:11,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.3172413793103448) internal successors, (191), 145 states have internal predecessors, (191), 0 states have call successors, (0), 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 04:54:11,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 191 transitions. [2023-12-21 04:54:11,677 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 191 transitions. Word has length 24 [2023-12-21 04:54:11,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:54:11,677 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 191 transitions. [2023-12-21 04:54:11,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:54:11,677 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 191 transitions. [2023-12-21 04:54:11,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-21 04:54:11,678 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:54:11,678 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:54:11,682 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 04:54:11,882 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 04:54:11,883 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:54:11,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:54:11,883 INFO L85 PathProgramCache]: Analyzing trace with hash 118165685, now seen corresponding path program 5 times [2023-12-21 04:54:11,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:54:11,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425967103] [2023-12-21 04:54:11,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:54:11,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:54:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:54:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-21 04:54:11,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:54:11,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425967103] [2023-12-21 04:54:11,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425967103] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:54:11,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964611453] [2023-12-21 04:54:11,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 04:54:11,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:54:11,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:54:11,993 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 04:54:12,024 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 04:54:12,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-21 04:54:12,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:54:12,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-21 04:54:12,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:54:12,204 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-21 04:54:12,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:54:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 04:54:12,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964611453] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:54:12,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:54:12,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14] total 30 [2023-12-21 04:54:12,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128727614] [2023-12-21 04:54:12,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:54:12,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-21 04:54:12,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:54:12,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-21 04:54:12,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2023-12-21 04:54:12,419 INFO L87 Difference]: Start difference. First operand 146 states and 191 transitions. Second operand has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 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 04:54:13,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:54:13,812 INFO L93 Difference]: Finished difference Result 288 states and 377 transitions. [2023-12-21 04:54:13,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-12-21 04:54:13,813 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-21 04:54:13,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:54:13,817 INFO L225 Difference]: With dead ends: 288 [2023-12-21 04:54:13,829 INFO L226 Difference]: Without dead ends: 243 [2023-12-21 04:54:13,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=400, Invalid=3022, Unknown=0, NotChecked=0, Total=3422 [2023-12-21 04:54:13,831 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 155 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 04:54:13,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 448 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 04:54:13,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-12-21 04:54:13,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 150. [2023-12-21 04:54:13,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.3221476510067114) internal successors, (197), 149 states have internal predecessors, (197), 0 states have call successors, (0), 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 04:54:13,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 197 transitions. [2023-12-21 04:54:13,887 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 197 transitions. Word has length 25 [2023-12-21 04:54:13,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:54:13,888 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 197 transitions. [2023-12-21 04:54:13,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 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 04:54:13,888 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 197 transitions. [2023-12-21 04:54:13,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-21 04:54:13,888 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:54:13,888 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:54:13,893 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 04:54:14,093 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 04:54:14,093 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:54:14,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:54:14,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1070841546, now seen corresponding path program 8 times [2023-12-21 04:54:14,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:54:14,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024574158] [2023-12-21 04:54:14,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:54:14,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:54:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:54:14,179 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 04:54:14,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:54:14,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024574158] [2023-12-21 04:54:14,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024574158] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:54:14,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549796105] [2023-12-21 04:54:14,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:54:14,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:54:14,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:54:14,181 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 04:54:14,183 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 04:54:14,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:54:14,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:54:14,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-21 04:54:14,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:54:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 04:54:14,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:54:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 04:54:14,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549796105] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:54:14,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:54:14,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2023-12-21 04:54:14,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280016883] [2023-12-21 04:54:14,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:54:14,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 04:54:14,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:54:14,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 04:54:14,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-21 04:54:14,290 INFO L87 Difference]: Start difference. First operand 150 states and 197 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:54:14,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:54:14,357 INFO L93 Difference]: Finished difference Result 171 states and 228 transitions. [2023-12-21 04:54:14,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 04:54:14,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-21 04:54:14,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:54:14,358 INFO L225 Difference]: With dead ends: 171 [2023-12-21 04:54:14,358 INFO L226 Difference]: Without dead ends: 138 [2023-12-21 04:54:14,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 9 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-21 04:54:14,359 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:54:14,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 42 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:54:14,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-12-21 04:54:14,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2023-12-21 04:54:14,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.3357664233576643) internal successors, (183), 137 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:54:14,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 183 transitions. [2023-12-21 04:54:14,399 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 183 transitions. Word has length 26 [2023-12-21 04:54:14,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:54:14,399 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 183 transitions. [2023-12-21 04:54:14,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:54:14,400 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 183 transitions. [2023-12-21 04:54:14,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-21 04:54:14,400 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:54:14,400 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:54:14,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-21 04:54:14,604 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 04:54:14,604 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:54:14,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:54:14,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1584003690, now seen corresponding path program 5 times [2023-12-21 04:54:14,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:54:14,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57884978] [2023-12-21 04:54:14,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:54:14,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:54:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:54:14,743 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 04:54:14,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:54:14,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57884978] [2023-12-21 04:54:14,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57884978] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:54:14,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885299060] [2023-12-21 04:54:14,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 04:54:14,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:54:14,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:54:14,745 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 04:54:14,747 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 04:54:14,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-21 04:54:14,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:54:14,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-21 04:54:14,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:54:14,954 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 04:54:14,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:54:15,164 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 04:54:15,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885299060] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:54:15,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:54:15,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 13] total 33 [2023-12-21 04:54:15,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685294146] [2023-12-21 04:54:15,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:54:15,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-21 04:54:15,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:54:15,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-21 04:54:15,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2023-12-21 04:54:15,166 INFO L87 Difference]: Start difference. First operand 138 states and 183 transitions. Second operand has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 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 04:54:16,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:54:16,514 INFO L93 Difference]: Finished difference Result 327 states and 489 transitions. [2023-12-21 04:54:16,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-12-21 04:54:16,514 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 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 26 [2023-12-21 04:54:16,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:54:16,515 INFO L225 Difference]: With dead ends: 327 [2023-12-21 04:54:16,515 INFO L226 Difference]: Without dead ends: 290 [2023-12-21 04:54:16,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1508, Invalid=4812, Unknown=0, NotChecked=0, Total=6320 [2023-12-21 04:54:16,517 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 234 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 04:54:16,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 216 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 04:54:16,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-12-21 04:54:16,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 168. [2023-12-21 04:54:16,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.3892215568862276) internal successors, (232), 167 states have internal predecessors, (232), 0 states have call successors, (0), 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 04:54:16,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 232 transitions. [2023-12-21 04:54:16,605 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 232 transitions. Word has length 26 [2023-12-21 04:54:16,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:54:16,605 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 232 transitions. [2023-12-21 04:54:16,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 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 04:54:16,605 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 232 transitions. [2023-12-21 04:54:16,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-21 04:54:16,606 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:54:16,606 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:54:16,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-21 04:54:16,813 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 04:54:16,813 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:54:16,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:54:16,816 INFO L85 PathProgramCache]: Analyzing trace with hash 2124387075, now seen corresponding path program 9 times [2023-12-21 04:54:16,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:54:16,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344199446] [2023-12-21 04:54:16,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:54:16,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:54:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:54:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-21 04:54:16,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:54:16,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344199446] [2023-12-21 04:54:16,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344199446] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:54:16,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714911676] [2023-12-21 04:54:16,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 04:54:16,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:54:16,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:54:16,941 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 04:54:16,943 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 04:54:16,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-21 04:54:16,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:54:16,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-21 04:54:16,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:54:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-21 04:54:17,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:54:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-21 04:54:17,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714911676] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:54:17,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:54:17,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2023-12-21 04:54:17,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871521000] [2023-12-21 04:54:17,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:54:17,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-21 04:54:17,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:54:17,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-21 04:54:17,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-12-21 04:54:17,066 INFO L87 Difference]: Start difference. First operand 168 states and 232 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:54:17,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:54:17,261 INFO L93 Difference]: Finished difference Result 212 states and 295 transitions. [2023-12-21 04:54:17,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-21 04:54:17,261 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-21 04:54:17,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:54:17,262 INFO L225 Difference]: With dead ends: 212 [2023-12-21 04:54:17,262 INFO L226 Difference]: Without dead ends: 195 [2023-12-21 04:54:17,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2023-12-21 04:54:17,263 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 04:54:17,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 55 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 04:54:17,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-12-21 04:54:17,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2023-12-21 04:54:17,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.3711340206185567) internal successors, (266), 194 states have internal predecessors, (266), 0 states have call successors, (0), 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 04:54:17,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 266 transitions. [2023-12-21 04:54:17,358 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 266 transitions. Word has length 27 [2023-12-21 04:54:17,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:54:17,358 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 266 transitions. [2023-12-21 04:54:17,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:54:17,358 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 266 transitions. [2023-12-21 04:54:17,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-21 04:54:17,358 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:54:17,358 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:54:17,364 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 04:54:17,563 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 04:54:17,563 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:54:17,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:54:17,563 INFO L85 PathProgramCache]: Analyzing trace with hash -543309725, now seen corresponding path program 6 times [2023-12-21 04:54:17,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:54:17,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100723241] [2023-12-21 04:54:17,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:54:17,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:54:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:54:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 04:54:17,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:54:17,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100723241] [2023-12-21 04:54:17,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100723241] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:54:17,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581597358] [2023-12-21 04:54:17,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 04:54:17,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:54:17,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:54:17,753 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 04:54:17,790 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 04:54:17,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-21 04:54:17,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:54:17,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-21 04:54:17,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:54:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 04:54:17,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:54:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 04:54:18,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581597358] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:54:18,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:54:18,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 23 [2023-12-21 04:54:18,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253137097] [2023-12-21 04:54:18,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:54:18,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-21 04:54:18,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:54:18,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-21 04:54:18,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2023-12-21 04:54:18,156 INFO L87 Difference]: Start difference. First operand 195 states and 266 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 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 04:54:21,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:54:21,577 INFO L93 Difference]: Finished difference Result 400 states and 543 transitions. [2023-12-21 04:54:21,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-12-21 04:54:21,577 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 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 27 [2023-12-21 04:54:21,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:54:21,578 INFO L225 Difference]: With dead ends: 400 [2023-12-21 04:54:21,578 INFO L226 Difference]: Without dead ends: 315 [2023-12-21 04:54:21,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 47 SyntacticMatches, 10 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1914 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=697, Invalid=6443, Unknown=0, NotChecked=0, Total=7140 [2023-12-21 04:54:21,581 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 223 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-21 04:54:21,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 476 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1415 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-21 04:54:21,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2023-12-21 04:54:21,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 205. [2023-12-21 04:54:21,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.338235294117647) internal successors, (273), 204 states have internal predecessors, (273), 0 states have call successors, (0), 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 04:54:21,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 273 transitions. [2023-12-21 04:54:21,677 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 273 transitions. Word has length 27 [2023-12-21 04:54:21,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:54:21,677 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 273 transitions. [2023-12-21 04:54:21,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 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 04:54:21,677 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 273 transitions. [2023-12-21 04:54:21,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-21 04:54:21,682 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:54:21,682 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:54:21,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-21 04:54:21,886 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 04:54:21,886 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:54:21,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:54:21,887 INFO L85 PathProgramCache]: Analyzing trace with hash 508799203, now seen corresponding path program 6 times [2023-12-21 04:54:21,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:54:21,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12345020] [2023-12-21 04:54:21,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:54:21,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:54:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:54:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-21 04:54:22,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:54:22,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12345020] [2023-12-21 04:54:22,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12345020] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:54:22,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059649984] [2023-12-21 04:54:22,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 04:54:22,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:54:22,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:54:22,034 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 04:54:22,057 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 04:54:22,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-21 04:54:22,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:54:22,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-21 04:54:22,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:54:22,195 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-21 04:54:22,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:54:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-21 04:54:22,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059649984] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:54:22,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:54:22,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 21 [2023-12-21 04:54:22,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296411265] [2023-12-21 04:54:22,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:54:22,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-21 04:54:22,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:54:22,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-21 04:54:22,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2023-12-21 04:54:22,353 INFO L87 Difference]: Start difference. First operand 205 states and 273 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 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 04:54:24,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:54:24,297 INFO L93 Difference]: Finished difference Result 287 states and 372 transitions. [2023-12-21 04:54:24,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-12-21 04:54:24,297 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 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 29 [2023-12-21 04:54:24,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:54:24,298 INFO L225 Difference]: With dead ends: 287 [2023-12-21 04:54:24,298 INFO L226 Difference]: Without dead ends: 251 [2023-12-21 04:54:24,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 49 SyntacticMatches, 10 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=516, Invalid=4596, Unknown=0, NotChecked=0, Total=5112 [2023-12-21 04:54:24,300 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 133 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 04:54:24,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 321 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 04:54:24,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-12-21 04:54:24,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 199. [2023-12-21 04:54:24,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.3383838383838385) internal successors, (265), 198 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:54:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 265 transitions. [2023-12-21 04:54:24,389 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 265 transitions. Word has length 29 [2023-12-21 04:54:24,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:54:24,389 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 265 transitions. [2023-12-21 04:54:24,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 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 04:54:24,389 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 265 transitions. [2023-12-21 04:54:24,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-21 04:54:24,390 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:54:24,390 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:54:24,397 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 04:54:24,594 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 04:54:24,594 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:54:24,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:54:24,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1998985234, now seen corresponding path program 7 times [2023-12-21 04:54:24,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:54:24,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848149681] [2023-12-21 04:54:24,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:54:24,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:54:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:54:24,767 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 04:54:24,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:54:24,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848149681] [2023-12-21 04:54:24,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848149681] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:54:24,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964374866] [2023-12-21 04:54:24,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 04:54:24,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:54:24,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:54:24,769 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 04:54:24,792 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 04:54:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:54:24,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-21 04:54:24,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:54:24,941 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 04:54:24,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:54:25,145 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 04:54:25,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964374866] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:54:25,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:54:25,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 24 [2023-12-21 04:54:25,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728010658] [2023-12-21 04:54:25,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:54:25,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-21 04:54:25,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:54:25,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-21 04:54:25,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2023-12-21 04:54:25,147 INFO L87 Difference]: Start difference. First operand 199 states and 265 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:54:35,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:54:35,901 INFO L93 Difference]: Finished difference Result 328 states and 457 transitions. [2023-12-21 04:54:35,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-12-21 04:54:35,901 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-21 04:54:35,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:54:35,902 INFO L225 Difference]: With dead ends: 328 [2023-12-21 04:54:35,902 INFO L226 Difference]: Without dead ends: 292 [2023-12-21 04:54:35,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 44 SyntacticMatches, 12 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5392 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1445, Invalid=15067, Unknown=0, NotChecked=0, Total=16512 [2023-12-21 04:54:35,905 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 239 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1866 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-21 04:54:35,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 128 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1866 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-21 04:54:35,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2023-12-21 04:54:36,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 221. [2023-12-21 04:54:36,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.3227272727272728) internal successors, (291), 220 states have internal predecessors, (291), 0 states have call successors, (0), 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 04:54:36,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 291 transitions. [2023-12-21 04:54:36,004 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 291 transitions. Word has length 29 [2023-12-21 04:54:36,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:54:36,004 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 291 transitions. [2023-12-21 04:54:36,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:54:36,004 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 291 transitions. [2023-12-21 04:54:36,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-21 04:54:36,005 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:54:36,005 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:54:36,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-21 04:54:36,209 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 04:54:36,210 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:54:36,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:54:36,210 INFO L85 PathProgramCache]: Analyzing trace with hash 529063012, now seen corresponding path program 10 times [2023-12-21 04:54:36,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:54:36,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826343818] [2023-12-21 04:54:36,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:54:36,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:54:36,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:54:36,355 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 04:54:36,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:54:36,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826343818] [2023-12-21 04:54:36,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826343818] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:54:36,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260097175] [2023-12-21 04:54:36,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 04:54:36,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:54:36,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:54:36,357 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 04:54:36,390 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 04:54:36,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 04:54:36,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:54:36,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-21 04:54:36,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:54:36,460 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 04:54:36,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:54:36,564 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 04:54:36,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260097175] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:54:36,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:54:36,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 8] total 25 [2023-12-21 04:54:36,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012002561] [2023-12-21 04:54:36,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:54:36,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-21 04:54:36,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:54:36,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-21 04:54:36,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2023-12-21 04:54:36,565 INFO L87 Difference]: Start difference. First operand 221 states and 291 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:54:37,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:54:37,420 INFO L93 Difference]: Finished difference Result 589 states and 774 transitions. [2023-12-21 04:54:37,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-21 04:54:37,420 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-21 04:54:37,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:54:37,422 INFO L225 Difference]: With dead ends: 589 [2023-12-21 04:54:37,422 INFO L226 Difference]: Without dead ends: 509 [2023-12-21 04:54:37,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2023-12-21 04:54:37,423 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 191 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 04:54:37,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 596 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 04:54:37,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2023-12-21 04:54:37,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 243. [2023-12-21 04:54:37,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.2933884297520661) internal successors, (313), 242 states have internal predecessors, (313), 0 states have call successors, (0), 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 04:54:37,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 313 transitions. [2023-12-21 04:54:37,530 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 313 transitions. Word has length 29 [2023-12-21 04:54:37,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:54:37,530 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 313 transitions. [2023-12-21 04:54:37,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:54:37,530 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 313 transitions. [2023-12-21 04:54:37,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-21 04:54:37,531 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:54:37,531 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:54:37,537 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 04:54:37,735 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 04:54:37,735 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:54:37,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:54:37,736 INFO L85 PathProgramCache]: Analyzing trace with hash 982104067, now seen corresponding path program 11 times [2023-12-21 04:54:37,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:54:37,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177585173] [2023-12-21 04:54:37,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:54:37,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:54:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:54:37,865 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-21 04:54:37,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:54:37,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177585173] [2023-12-21 04:54:37,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177585173] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:54:37,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890394322] [2023-12-21 04:54:37,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 04:54:37,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:54:37,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:54:37,866 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 04:54:37,914 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 04:54:37,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-21 04:54:37,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:54:37,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-21 04:54:37,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:54:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-21 04:54:38,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:54:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-21 04:54:38,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890394322] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:54:38,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:54:38,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 14 [2023-12-21 04:54:38,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717728663] [2023-12-21 04:54:38,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:54:38,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-21 04:54:38,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:54:38,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-21 04:54:38,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-12-21 04:54:38,087 INFO L87 Difference]: Start difference. First operand 243 states and 313 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 04:54:38,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:54:38,709 INFO L93 Difference]: Finished difference Result 418 states and 592 transitions. [2023-12-21 04:54:38,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-21 04:54:38,709 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 31 [2023-12-21 04:54:38,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:54:38,710 INFO L225 Difference]: With dead ends: 418 [2023-12-21 04:54:38,710 INFO L226 Difference]: Without dead ends: 374 [2023-12-21 04:54:38,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2023-12-21 04:54:38,711 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 94 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 04:54:38,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 92 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 04:54:38,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-12-21 04:54:38,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 359. [2023-12-21 04:54:38,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.3798882681564246) internal successors, (494), 358 states have internal predecessors, (494), 0 states have call successors, (0), 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 04:54:38,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 494 transitions. [2023-12-21 04:54:38,856 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 494 transitions. Word has length 31 [2023-12-21 04:54:38,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:54:38,856 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 494 transitions. [2023-12-21 04:54:38,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 04:54:38,856 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 494 transitions. [2023-12-21 04:54:38,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-21 04:54:38,857 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:54:38,857 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:54:38,876 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 04:54:39,061 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 04:54:39,062 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:54:39,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:54:39,062 INFO L85 PathProgramCache]: Analyzing trace with hash 38476852, now seen corresponding path program 12 times [2023-12-21 04:54:39,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:54:39,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844762865] [2023-12-21 04:54:39,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:54:39,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:54:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:54:39,225 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 04:54:39,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:54:39,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844762865] [2023-12-21 04:54:39,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844762865] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:54:39,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937767666] [2023-12-21 04:54:39,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 04:54:39,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:54:39,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:54:39,227 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 04:54:39,251 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 04:54:39,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-21 04:54:39,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:54:39,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-21 04:54:39,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:54:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-21 04:54:39,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:54:39,806 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-21 04:54:39,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937767666] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:54:39,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:54:39,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 15] total 38 [2023-12-21 04:54:39,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120033595] [2023-12-21 04:54:39,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:54:39,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-21 04:54:39,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:54:39,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-21 04:54:39,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2023-12-21 04:54:39,807 INFO L87 Difference]: Start difference. First operand 359 states and 494 transitions. Second operand has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 38 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:54:45,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:54:45,920 INFO L93 Difference]: Finished difference Result 843 states and 1188 transitions. [2023-12-21 04:54:45,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2023-12-21 04:54:45,920 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 38 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-12-21 04:54:45,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:54:45,921 INFO L225 Difference]: With dead ends: 843 [2023-12-21 04:54:45,921 INFO L226 Difference]: Without dead ends: 665 [2023-12-21 04:54:45,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6620 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2440, Invalid=20512, Unknown=0, NotChecked=0, Total=22952 [2023-12-21 04:54:45,926 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 205 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 2850 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 3335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 2850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-21 04:54:45,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 948 Invalid, 3335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 2850 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-21 04:54:45,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2023-12-21 04:54:46,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 421. [2023-12-21 04:54:46,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.4476190476190476) internal successors, (608), 420 states have internal predecessors, (608), 0 states have call successors, (0), 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 04:54:46,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 608 transitions. [2023-12-21 04:54:46,122 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 608 transitions. Word has length 31 [2023-12-21 04:54:46,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:54:46,122 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 608 transitions. [2023-12-21 04:54:46,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 38 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:54:46,123 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 608 transitions. [2023-12-21 04:54:46,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-21 04:54:46,123 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:54:46,123 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:54:46,130 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 04:54:46,328 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 04:54:46,328 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:54:46,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:54:46,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2049814678, now seen corresponding path program 8 times [2023-12-21 04:54:46,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:54:46,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613059158] [2023-12-21 04:54:46,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:54:46,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:54:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:54:46,552 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 04:54:46,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:54:46,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613059158] [2023-12-21 04:54:46,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613059158] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:54:46,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204392015] [2023-12-21 04:54:46,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:54:46,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:54:46,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:54:46,554 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 04:54:46,555 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 04:54:46,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:54:46,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:54:46,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-21 04:54:46,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:54:46,761 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 04:54:46,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:54:47,027 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 04:54:47,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204392015] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:54:47,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:54:47,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 27 [2023-12-21 04:54:47,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504012000] [2023-12-21 04:54:47,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:54:47,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-21 04:54:47,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:54:47,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-21 04:54:47,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2023-12-21 04:54:47,028 INFO L87 Difference]: Start difference. First operand 421 states and 608 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:06,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:55:06,060 INFO L93 Difference]: Finished difference Result 623 states and 906 transitions. [2023-12-21 04:55:06,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2023-12-21 04:55:06,060 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-12-21 04:55:06,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:55:06,062 INFO L225 Difference]: With dead ends: 623 [2023-12-21 04:55:06,062 INFO L226 Difference]: Without dead ends: 534 [2023-12-21 04:55:06,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 48 SyntacticMatches, 14 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5960 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=1584, Invalid=17048, Unknown=0, NotChecked=0, Total=18632 [2023-12-21 04:55:06,063 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 258 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 2227 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 2227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-21 04:55:06,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 154 Invalid, 2420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 2227 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-21 04:55:06,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2023-12-21 04:55:06,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 435. [2023-12-21 04:55:06,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 1.4170506912442395) internal successors, (615), 434 states have internal predecessors, (615), 0 states have call successors, (0), 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 04:55:06,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 615 transitions. [2023-12-21 04:55:06,277 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 615 transitions. Word has length 32 [2023-12-21 04:55:06,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:55:06,278 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 615 transitions. [2023-12-21 04:55:06,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:06,278 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 615 transitions. [2023-12-21 04:55:06,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-21 04:55:06,278 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:55:06,278 INFO L195 NwaCegarLoop]: trace histogram [11, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:55:06,283 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 04:55:06,483 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 04:55:06,484 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:55:06,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:55:06,484 INFO L85 PathProgramCache]: Analyzing trace with hash 65669607, now seen corresponding path program 7 times [2023-12-21 04:55:06,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:55:06,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882442194] [2023-12-21 04:55:06,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:55:06,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:55:06,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:55:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-21 04:55:06,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:55:06,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882442194] [2023-12-21 04:55:06,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882442194] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:55:06,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827745261] [2023-12-21 04:55:06,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 04:55:06,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:55:06,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:55:06,681 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 04:55:06,695 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 04:55:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:55:06,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-21 04:55:06,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:55:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-21 04:55:06,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:55:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-12-21 04:55:06,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827745261] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:55:06,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:55:06,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 10] total 30 [2023-12-21 04:55:06,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298414239] [2023-12-21 04:55:06,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:55:06,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-21 04:55:06,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:55:06,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-21 04:55:06,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2023-12-21 04:55:06,995 INFO L87 Difference]: Start difference. First operand 435 states and 615 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 04:55:09,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:55:09,552 INFO L93 Difference]: Finished difference Result 891 states and 1259 transitions. [2023-12-21 04:55:09,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-12-21 04:55:09,552 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 32 [2023-12-21 04:55:09,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:55:09,554 INFO L225 Difference]: With dead ends: 891 [2023-12-21 04:55:09,554 INFO L226 Difference]: Without dead ends: 708 [2023-12-21 04:55:09,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2158 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=644, Invalid=7546, Unknown=0, NotChecked=0, Total=8190 [2023-12-21 04:55:09,555 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 172 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 04:55:09,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 1006 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 04:55:09,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2023-12-21 04:55:09,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 478. [2023-12-21 04:55:09,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 1.3815513626834381) internal successors, (659), 477 states have internal predecessors, (659), 0 states have call successors, (0), 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 04:55:09,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 659 transitions. [2023-12-21 04:55:09,777 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 659 transitions. Word has length 32 [2023-12-21 04:55:09,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:55:09,777 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 659 transitions. [2023-12-21 04:55:09,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 04:55:09,778 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 659 transitions. [2023-12-21 04:55:09,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-21 04:55:09,778 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:55:09,779 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:55:09,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-12-21 04:55:09,980 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 04:55:09,983 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:55:09,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:55:09,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1554749943, now seen corresponding path program 8 times [2023-12-21 04:55:09,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:55:09,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900556819] [2023-12-21 04:55:09,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:55:09,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:55:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:55:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-21 04:55:10,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:55:10,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900556819] [2023-12-21 04:55:10,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900556819] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:55:10,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915841462] [2023-12-21 04:55:10,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:55:10,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:55:10,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:55:10,194 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 04:55:10,237 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 04:55:10,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:55:10,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:55:10,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 59 conjunts are in the unsatisfiable core [2023-12-21 04:55:10,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:55:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-21 04:55:10,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:55:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-21 04:55:10,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915841462] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:55:10,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:55:10,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 20] total 45 [2023-12-21 04:55:10,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087158868] [2023-12-21 04:55:10,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:55:10,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-12-21 04:55:10,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:55:10,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-12-21 04:55:10,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1731, Unknown=0, NotChecked=0, Total=1980 [2023-12-21 04:55:10,840 INFO L87 Difference]: Start difference. First operand 478 states and 659 transitions. Second operand has 45 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 45 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:23,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:55:23,647 INFO L93 Difference]: Finished difference Result 815 states and 1079 transitions. [2023-12-21 04:55:23,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-12-21 04:55:23,647 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 45 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-21 04:55:23,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:55:23,649 INFO L225 Difference]: With dead ends: 815 [2023-12-21 04:55:23,649 INFO L226 Difference]: Without dead ends: 688 [2023-12-21 04:55:23,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3406 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1088, Invalid=12252, Unknown=0, NotChecked=0, Total=13340 [2023-12-21 04:55:23,650 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 245 mSDsluCounter, 1212 mSDsCounter, 0 mSdLazyCounter, 2252 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1271 SdHoareTripleChecker+Invalid, 2482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 2252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-21 04:55:23,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 1271 Invalid, 2482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 2252 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-21 04:55:23,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2023-12-21 04:55:23,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 508. [2023-12-21 04:55:23,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 1.3629191321499015) internal successors, (691), 507 states have internal predecessors, (691), 0 states have call successors, (0), 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 04:55:23,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 691 transitions. [2023-12-21 04:55:23,915 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 691 transitions. Word has length 34 [2023-12-21 04:55:23,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:55:23,915 INFO L495 AbstractCegarLoop]: Abstraction has 508 states and 691 transitions. [2023-12-21 04:55:23,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 45 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:55:23,915 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 691 transitions. [2023-12-21 04:55:23,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-21 04:55:23,916 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:55:23,916 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:55:23,923 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 04:55:24,121 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 04:55:24,122 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:55:24,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:55:24,122 INFO L85 PathProgramCache]: Analyzing trace with hash -2049057390, now seen corresponding path program 9 times [2023-12-21 04:55:24,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:55:24,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164885019] [2023-12-21 04:55:24,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:55:24,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:55:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:55:24,383 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 04:55:24,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:55:24,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164885019] [2023-12-21 04:55:24,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164885019] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:55:24,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942182319] [2023-12-21 04:55:24,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 04:55:24,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:55:24,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:55:24,386 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 04:55:24,388 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 04:55:24,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-21 04:55:24,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:55:24,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-21 04:55:24,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:55:24,778 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 04:55:24,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:55:25,089 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 04:55:25,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942182319] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:55:25,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:55:25,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 11] total 30 [2023-12-21 04:55:25,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842824612] [2023-12-21 04:55:25,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:55:25,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-21 04:55:25,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:55:25,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-21 04:55:25,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2023-12-21 04:55:25,092 INFO L87 Difference]: Start difference. First operand 508 states and 691 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 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 04:56:16,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:56:16,202 INFO L93 Difference]: Finished difference Result 705 states and 985 transitions. [2023-12-21 04:56:16,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2023-12-21 04:56:16,202 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 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 35 [2023-12-21 04:56:16,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:56:16,203 INFO L225 Difference]: With dead ends: 705 [2023-12-21 04:56:16,203 INFO L226 Difference]: Without dead ends: 649 [2023-12-21 04:56:16,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 52 SyntacticMatches, 16 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12368 ImplicationChecksByTransitivity, 45.9s TimeCoverageRelationStatistics Valid=2583, Invalid=32573, Unknown=0, NotChecked=0, Total=35156 [2023-12-21 04:56:16,205 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 514 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 3545 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 3827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 3545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-12-21 04:56:16,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 144 Invalid, 3827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 3545 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-12-21 04:56:16,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2023-12-21 04:56:16,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 520. [2023-12-21 04:56:16,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 1.3506743737957612) internal successors, (701), 519 states have internal predecessors, (701), 0 states have call successors, (0), 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 04:56:16,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 701 transitions. [2023-12-21 04:56:16,491 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 701 transitions. Word has length 35 [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 520 states and 701 transitions. [2023-12-21 04:56:16,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 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 04:56:16,491 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 701 transitions. [2023-12-21 04:56:16,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-21 04:56:16,492 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:56:16,492 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:56:16,510 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 04:56:16,697 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 04:56:16,697 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:56:16,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:56:16,697 INFO L85 PathProgramCache]: Analyzing trace with hash -264677034, now seen corresponding path program 13 times [2023-12-21 04:56:16,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:56:16,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584234978] [2023-12-21 04:56:16,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:16,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:56:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-21 04:56:16,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:56:16,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584234978] [2023-12-21 04:56:16,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584234978] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:56:16,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386648477] [2023-12-21 04:56:16,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 04:56:16,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:16,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:56:16,857 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 04:56:16,858 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 04:56:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:16,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-21 04:56:16,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:56:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-21 04:56:16,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:56:17,022 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-21 04:56:17,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386648477] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:56:17,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:56:17,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2023-12-21 04:56:17,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240152977] [2023-12-21 04:56:17,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:56:17,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 04:56:17,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:56:17,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 04:56:17,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-21 04:56:17,023 INFO L87 Difference]: Start difference. First operand 520 states and 701 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:17,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:56:17,350 INFO L93 Difference]: Finished difference Result 567 states and 773 transitions. [2023-12-21 04:56:17,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 04:56:17,350 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-12-21 04:56:17,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:56:17,351 INFO L225 Difference]: With dead ends: 567 [2023-12-21 04:56:17,351 INFO L226 Difference]: Without dead ends: 504 [2023-12-21 04:56:17,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 15 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-21 04:56:17,352 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:56:17,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 78 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:56:17,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2023-12-21 04:56:17,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 504. [2023-12-21 04:56:17,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 1.3578528827037772) internal successors, (683), 503 states have internal predecessors, (683), 0 states have call successors, (0), 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 04:56:17,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 683 transitions. [2023-12-21 04:56:17,642 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 683 transitions. Word has length 36 [2023-12-21 04:56:17,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:56:17,642 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 683 transitions. [2023-12-21 04:56:17,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:17,642 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 683 transitions. [2023-12-21 04:56:17,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-21 04:56:17,643 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:56:17,643 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:56:17,654 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 04:56:17,848 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 04:56:17,849 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:56:17,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:56:17,849 INFO L85 PathProgramCache]: Analyzing trace with hash -2046252361, now seen corresponding path program 14 times [2023-12-21 04:56:17,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:56:17,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612931462] [2023-12-21 04:56:17,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:17,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:56:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-21 04:56:18,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:56:18,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612931462] [2023-12-21 04:56:18,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612931462] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:56:18,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004076051] [2023-12-21 04:56:18,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:56:18,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:18,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:56:18,069 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 04:56:18,071 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 04:56:18,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:56:18,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:56:18,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 75 conjunts are in the unsatisfiable core [2023-12-21 04:56:18,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:56:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:56:18,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:56:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-21 04:56:18,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004076051] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:56:18,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:56:18,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27, 17] total 48 [2023-12-21 04:56:18,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939467903] [2023-12-21 04:56:18,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:56:18,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-21 04:56:18,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:56:18,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-21 04:56:18,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1877, Unknown=0, NotChecked=0, Total=2256 [2023-12-21 04:56:18,762 INFO L87 Difference]: Start difference. First operand 504 states and 683 transitions. Second operand has 48 states, 48 states have (on average 1.5) internal successors, (72), 48 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:26,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:56:26,577 INFO L93 Difference]: Finished difference Result 1094 states and 1521 transitions. [2023-12-21 04:56:26,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2023-12-21 04:56:26,577 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.5) internal successors, (72), 48 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-12-21 04:56:26,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:56:26,579 INFO L225 Difference]: With dead ends: 1094 [2023-12-21 04:56:26,579 INFO L226 Difference]: Without dead ends: 886 [2023-12-21 04:56:26,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10021 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3321, Invalid=25749, Unknown=0, NotChecked=0, Total=29070 [2023-12-21 04:56:26,581 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 250 mSDsluCounter, 1198 mSDsCounter, 0 mSdLazyCounter, 3895 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 4414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 3895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:56:26,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 1259 Invalid, 4414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 3895 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-21 04:56:26,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2023-12-21 04:56:26,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 448. [2023-12-21 04:56:26,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.378076062639821) internal successors, (616), 447 states have internal predecessors, (616), 0 states have call successors, (0), 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 04:56:26,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 616 transitions. [2023-12-21 04:56:26,905 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 616 transitions. Word has length 36 [2023-12-21 04:56:26,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:56:26,905 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 616 transitions. [2023-12-21 04:56:26,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.5) internal successors, (72), 48 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:56:26,905 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 616 transitions. [2023-12-21 04:56:26,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-21 04:56:26,905 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:56:26,906 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:56:26,910 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 04:56:27,110 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 04:56:27,110 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:56:27,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:56:27,110 INFO L85 PathProgramCache]: Analyzing trace with hash -349083083, now seen corresponding path program 9 times [2023-12-21 04:56:27,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:56:27,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720566190] [2023-12-21 04:56:27,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:56:27,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:56:27,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:56:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-21 04:56:27,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:56:27,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720566190] [2023-12-21 04:56:27,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720566190] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:56:27,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392190447] [2023-12-21 04:56:27,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 04:56:27,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:56:27,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:56:27,315 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 04:56:27,316 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 04:56:27,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-21 04:56:27,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:56:27,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-21 04:56:27,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:56:27,652 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-21 04:56:27,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:56:27,931 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-21 04:56:27,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392190447] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:56:27,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:56:27,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 11] total 39 [2023-12-21 04:56:27,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409169842] [2023-12-21 04:56:27,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:56:27,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-21 04:56:27,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:56:27,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-21 04:56:27,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2023-12-21 04:56:27,933 INFO L87 Difference]: Start difference. First operand 448 states and 616 transitions. Second operand has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 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 04:57:20,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:57:20,205 INFO L93 Difference]: Finished difference Result 1027 states and 1464 transitions. [2023-12-21 04:57:20,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 244 states. [2023-12-21 04:57:20,205 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 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 37 [2023-12-21 04:57:20,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:57:20,207 INFO L225 Difference]: With dead ends: 1027 [2023-12-21 04:57:20,207 INFO L226 Difference]: Without dead ends: 881 [2023-12-21 04:57:20,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25736 ImplicationChecksByTransitivity, 47.6s TimeCoverageRelationStatistics Valid=6309, Invalid=61031, Unknown=0, NotChecked=0, Total=67340 [2023-12-21 04:57:20,210 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 462 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 3021 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 3439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 3021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-12-21 04:57:20,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 807 Invalid, 3439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 3021 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-12-21 04:57:20,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2023-12-21 04:57:20,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 486. [2023-12-21 04:57:20,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 1.3670103092783505) internal successors, (663), 485 states have internal predecessors, (663), 0 states have call successors, (0), 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 04:57:20,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 663 transitions. [2023-12-21 04:57:20,538 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 663 transitions. Word has length 37 [2023-12-21 04:57:20,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:57:20,538 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 663 transitions. [2023-12-21 04:57:20,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 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 04:57:20,538 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 663 transitions. [2023-12-21 04:57:20,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-21 04:57:20,539 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:57:20,539 INFO L195 NwaCegarLoop]: trace histogram [13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:57:20,544 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 04:57:20,744 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 04:57:20,744 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:57:20,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:57:20,744 INFO L85 PathProgramCache]: Analyzing trace with hash -680983323, now seen corresponding path program 15 times [2023-12-21 04:57:20,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:57:20,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755681036] [2023-12-21 04:57:20,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:57:20,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:57:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:57:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-21 04:57:21,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:57:21,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755681036] [2023-12-21 04:57:21,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755681036] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:57:21,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468048309] [2023-12-21 04:57:21,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 04:57:21,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:57:21,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:57:21,017 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 04:57:21,024 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 04:57:21,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-21 04:57:21,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:57:21,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-21 04:57:21,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:57:21,361 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-12-21 04:57:21,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:57:21,864 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-12-21 04:57:21,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468048309] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:57:21,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:57:21,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 18] total 47 [2023-12-21 04:57:21,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416951552] [2023-12-21 04:57:21,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:57:21,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-21 04:57:21,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:57:21,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-21 04:57:21,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1966, Unknown=0, NotChecked=0, Total=2162 [2023-12-21 04:57:21,865 INFO L87 Difference]: Start difference. First operand 486 states and 663 transitions. Second operand has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 states have internal predecessors, (75), 0 states have call successors, (0), 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 04:57:32,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:57:32,072 INFO L93 Difference]: Finished difference Result 1100 states and 1500 transitions. [2023-12-21 04:57:32,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2023-12-21 04:57:32,072 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 04:57:32,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:57:32,074 INFO L225 Difference]: With dead ends: 1100 [2023-12-21 04:57:32,074 INFO L226 Difference]: Without dead ends: 835 [2023-12-21 04:57:32,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8446 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=3039, Invalid=27411, Unknown=0, NotChecked=0, Total=30450 [2023-12-21 04:57:32,078 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 241 mSDsluCounter, 1647 mSDsCounter, 0 mSdLazyCounter, 5103 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 5653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 5103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-21 04:57:32,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 1706 Invalid, 5653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 5103 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-21 04:57:32,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2023-12-21 04:57:32,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 531. [2023-12-21 04:57:32,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.381132075471698) internal successors, (732), 530 states have internal predecessors, (732), 0 states have call successors, (0), 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 04:57:32,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 732 transitions. [2023-12-21 04:57:32,444 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 732 transitions. Word has length 38 [2023-12-21 04:57:32,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:57:32,444 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 732 transitions. [2023-12-21 04:57:32,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 states have internal predecessors, (75), 0 states have call successors, (0), 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 04:57:32,444 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 732 transitions. [2023-12-21 04:57:32,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-21 04:57:32,444 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:57:32,445 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:57:32,451 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 04:57:32,649 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 04:57:32,649 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:57:32,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:57:32,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1073563949, now seen corresponding path program 10 times [2023-12-21 04:57:32,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:57:32,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114939120] [2023-12-21 04:57:32,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:57:32,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:57:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:57:32,953 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 04:57:32,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:57:32,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114939120] [2023-12-21 04:57:32,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114939120] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:57:32,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541088338] [2023-12-21 04:57:32,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 04:57:32,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:57:32,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:57:32,954 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 04:57:32,956 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 04:57:32,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 04:57:32,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:57:32,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-21 04:57:32,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:57:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-21 04:57:33,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:57:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-21 04:57:33,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541088338] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:57:33,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:57:33,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 12] total 33 [2023-12-21 04:57:33,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56212277] [2023-12-21 04:57:33,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:57:33,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-21 04:57:33,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:57:33,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-21 04:57:33,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2023-12-21 04:57:33,581 INFO L87 Difference]: Start difference. First operand 531 states and 732 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 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 04:58:17,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:58:17,045 INFO L93 Difference]: Finished difference Result 735 states and 1062 transitions. [2023-12-21 04:58:17,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-12-21 04:58:17,046 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 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 39 [2023-12-21 04:58:17,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:58:17,047 INFO L225 Difference]: With dead ends: 735 [2023-12-21 04:58:17,047 INFO L226 Difference]: Without dead ends: 629 [2023-12-21 04:58:17,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 58 SyntacticMatches, 18 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5668 ImplicationChecksByTransitivity, 40.8s TimeCoverageRelationStatistics Valid=1921, Invalid=17819, Unknown=0, NotChecked=0, Total=19740 [2023-12-21 04:58:17,048 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 153 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 2519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-21 04:58:17,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 176 Invalid, 2519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-21 04:58:17,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2023-12-21 04:58:17,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 553. [2023-12-21 04:58:17,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 1.3478260869565217) internal successors, (744), 552 states have internal predecessors, (744), 0 states have call successors, (0), 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 04:58:17,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 744 transitions. [2023-12-21 04:58:17,449 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 744 transitions. Word has length 39 [2023-12-21 04:58:17,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:58:17,449 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 744 transitions. [2023-12-21 04:58:17,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 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 04:58:17,449 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 744 transitions. [2023-12-21 04:58:17,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-21 04:58:17,465 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:58:17,465 INFO L195 NwaCegarLoop]: trace histogram [14, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:58:17,472 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 04:58:17,670 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 04:58:17,670 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:58:17,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:58:17,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1557158412, now seen corresponding path program 11 times [2023-12-21 04:58:17,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:58:17,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744229501] [2023-12-21 04:58:17,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:58:17,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:58:17,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:58:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-21 04:58:17,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:58:17,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744229501] [2023-12-21 04:58:17,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744229501] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:58:17,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039010568] [2023-12-21 04:58:17,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 04:58:17,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:58:17,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:58:17,934 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 04:58:17,936 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 04:58:18,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-12-21 04:58:18,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:58:18,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 79 conjunts are in the unsatisfiable core [2023-12-21 04:58:18,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:58:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:58:18,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:58:19,124 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-12-21 04:58:19,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039010568] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:58:19,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:58:19,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 31, 19] total 55 [2023-12-21 04:58:19,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021638567] [2023-12-21 04:58:19,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:58:19,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-12-21 04:58:19,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:58:19,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-12-21 04:58:19,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=2495, Unknown=0, NotChecked=0, Total=2970 [2023-12-21 04:58:19,126 INFO L87 Difference]: Start difference. First operand 553 states and 744 transitions. Second operand has 55 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 55 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) [2023-12-21 04:58:31,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:58:31,316 INFO L93 Difference]: Finished difference Result 1360 states and 1866 transitions. [2023-12-21 04:58:31,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2023-12-21 04:58:31,316 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 55 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-12-21 04:58:31,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:58:31,319 INFO L225 Difference]: With dead ends: 1360 [2023-12-21 04:58:31,319 INFO L226 Difference]: Without dead ends: 1103 [2023-12-21 04:58:31,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11326 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=3470, Invalid=31312, Unknown=0, NotChecked=0, Total=34782 [2023-12-21 04:58:31,320 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 270 mSDsluCounter, 1499 mSDsCounter, 0 mSdLazyCounter, 5708 mSolverCounterSat, 492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1567 SdHoareTripleChecker+Invalid, 6200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 5708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:58:31,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 1567 Invalid, 6200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 5708 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-12-21 04:58:31,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2023-12-21 04:58:31,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 600. [2023-12-21 04:58:31,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 1.333889816360601) internal successors, (799), 599 states have internal predecessors, (799), 0 states have call successors, (0), 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 04:58:31,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 799 transitions. [2023-12-21 04:58:31,828 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 799 transitions. Word has length 39 [2023-12-21 04:58:31,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:58:31,828 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 799 transitions. [2023-12-21 04:58:31,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 55 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) [2023-12-21 04:58:31,828 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 799 transitions. [2023-12-21 04:58:31,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-21 04:58:31,829 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:58:31,829 INFO L195 NwaCegarLoop]: trace histogram [15, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:58:31,834 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 04:58:32,033 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 04:58:32,034 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:58:32,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:58:32,034 INFO L85 PathProgramCache]: Analyzing trace with hash -2141934014, now seen corresponding path program 16 times [2023-12-21 04:58:32,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:58:32,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26863549] [2023-12-21 04:58:32,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:58:32,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:58:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:58:32,310 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-21 04:58:32,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:58:32,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26863549] [2023-12-21 04:58:32,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26863549] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:58:32,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588208723] [2023-12-21 04:58:32,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 04:58:32,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:58:32,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:58:32,324 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 04:58:32,368 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 04:58:32,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 04:58:32,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:58:32,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-21 04:58:32,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:58:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-21 04:58:32,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:58:32,720 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-12-21 04:58:32,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588208723] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:58:32,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:58:32,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 10] total 36 [2023-12-21 04:58:32,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156060766] [2023-12-21 04:58:32,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:58:32,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-21 04:58:32,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:58:32,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-21 04:58:32,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2023-12-21 04:58:32,722 INFO L87 Difference]: Start difference. First operand 600 states and 799 transitions. Second operand has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:58:35,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:58:35,133 INFO L93 Difference]: Finished difference Result 1380 states and 1836 transitions. [2023-12-21 04:58:35,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-12-21 04:58:35,141 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-12-21 04:58:35,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:58:35,145 INFO L225 Difference]: With dead ends: 1380 [2023-12-21 04:58:35,146 INFO L226 Difference]: Without dead ends: 1136 [2023-12-21 04:58:35,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1001, Invalid=3289, Unknown=0, NotChecked=0, Total=4290 [2023-12-21 04:58:35,151 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 420 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 1903 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 1280 SdHoareTripleChecker+Invalid, 2110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-21 04:58:35,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 1280 Invalid, 2110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1903 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-21 04:58:35,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2023-12-21 04:58:35,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 687. [2023-12-21 04:58:35,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 1.2784256559766765) internal successors, (877), 686 states have internal predecessors, (877), 0 states have call successors, (0), 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 04:58:35,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 877 transitions. [2023-12-21 04:58:35,654 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 877 transitions. Word has length 41 [2023-12-21 04:58:35,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:58:35,655 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 877 transitions. [2023-12-21 04:58:35,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:58:35,655 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 877 transitions. [2023-12-21 04:58:35,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-21 04:58:35,656 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:58:35,656 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:58:35,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-12-21 04:58:35,860 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 04:58:35,860 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:58:35,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:58:35,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1523110455, now seen corresponding path program 12 times [2023-12-21 04:58:35,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:58:35,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425312791] [2023-12-21 04:58:35,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:58:35,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:58:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:58:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-12-21 04:58:36,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:58:36,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425312791] [2023-12-21 04:58:36,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425312791] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:58:36,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871309394] [2023-12-21 04:58:36,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 04:58:36,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:58:36,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:58:36,189 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 04:58:36,239 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 04:58:36,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-12-21 04:58:36,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:58:36,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-21 04:58:36,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:58:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-12-21 04:58:36,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:58:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-12-21 04:58:36,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871309394] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:58:36,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:58:36,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 53 [2023-12-21 04:58:36,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924577988] [2023-12-21 04:58:36,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:58:36,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-12-21 04:58:36,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:58:36,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-12-21 04:58:36,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=2411, Unknown=0, NotChecked=0, Total=2756 [2023-12-21 04:58:36,998 INFO L87 Difference]: Start difference. First operand 687 states and 877 transitions. Second operand has 53 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:59:12,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:59:12,863 INFO L93 Difference]: Finished difference Result 1063 states and 1329 transitions. [2023-12-21 04:59:12,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-12-21 04:59:12,863 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-12-21 04:59:12,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:59:12,865 INFO L225 Difference]: With dead ends: 1063 [2023-12-21 04:59:12,866 INFO L226 Difference]: Without dead ends: 874 [2023-12-21 04:59:12,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 32.9s TimeCoverageRelationStatistics Valid=933, Invalid=7077, Unknown=0, NotChecked=0, Total=8010 [2023-12-21 04:59:12,866 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 450 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 2489 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 2685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 2489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-21 04:59:12,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 1330 Invalid, 2685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 2489 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-21 04:59:12,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2023-12-21 04:59:13,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 646. [2023-12-21 04:59:13,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 1.2666666666666666) internal successors, (817), 645 states have internal predecessors, (817), 0 states have call successors, (0), 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 04:59:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 817 transitions. [2023-12-21 04:59:13,346 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 817 transitions. Word has length 42 [2023-12-21 04:59:13,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:59:13,346 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 817 transitions. [2023-12-21 04:59:13,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:59:13,346 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 817 transitions. [2023-12-21 04:59:13,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-21 04:59:13,349 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:59:13,349 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:59:13,357 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 04:59:13,555 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 04:59:13,555 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:59:13,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:59:13,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1702945065, now seen corresponding path program 13 times [2023-12-21 04:59:13,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:59:13,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10424364] [2023-12-21 04:59:13,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:59:13,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:59:13,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:59:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 04:59:13,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:59:13,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10424364] [2023-12-21 04:59:13,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10424364] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:59:13,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48729051] [2023-12-21 04:59:13,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 04:59:13,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:59:13,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:59:13,959 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:59:13,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-12-21 04:59:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:59:14,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-21 04:59:14,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:59:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 24 proven. 86 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-21 04:59:14,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:59:14,845 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 24 proven. 86 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-21 04:59:14,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48729051] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:59:14,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:59:14,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13, 13] total 36 [2023-12-21 04:59:14,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725664606] [2023-12-21 04:59:14,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:59:14,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-21 04:59:14,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:59:14,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-21 04:59:14,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2023-12-21 04:59:14,847 INFO L87 Difference]: Start difference. First operand 646 states and 817 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:01:11,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 05:01:11,227 INFO L93 Difference]: Finished difference Result 879 states and 1194 transitions. [2023-12-21 05:01:11,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2023-12-21 05:01:11,227 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-12-21 05:01:11,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 05:01:11,229 INFO L225 Difference]: With dead ends: 879 [2023-12-21 05:01:11,229 INFO L226 Difference]: Without dead ends: 808 [2023-12-21 05:01:11,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 62 SyntacticMatches, 20 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14685 ImplicationChecksByTransitivity, 109.4s TimeCoverageRelationStatistics Valid=3376, Invalid=40096, Unknown=0, NotChecked=0, Total=43472 [2023-12-21 05:01:11,231 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 260 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 4459 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 4755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 4459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-12-21 05:01:11,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 263 Invalid, 4755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 4459 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2023-12-21 05:01:11,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2023-12-21 05:01:11,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 660. [2023-12-21 05:01:11,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 1.2625189681335356) internal successors, (832), 659 states have internal predecessors, (832), 0 states have call successors, (0), 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 05:01:11,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 832 transitions. [2023-12-21 05:01:11,732 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 832 transitions. Word has length 42 [2023-12-21 05:01:11,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 05:01:11,732 INFO L495 AbstractCegarLoop]: Abstraction has 660 states and 832 transitions. [2023-12-21 05:01:11,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:01:11,732 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 832 transitions. [2023-12-21 05:01:11,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-21 05:01:11,735 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 05:01:11,735 INFO L195 NwaCegarLoop]: trace histogram [16, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 05:01:11,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-12-21 05:01:11,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-12-21 05:01:11,941 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 05:01:11,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 05:01:11,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1821587031, now seen corresponding path program 14 times [2023-12-21 05:01:11,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 05:01:11,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606861292] [2023-12-21 05:01:11,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:01:11,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 05:01:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 05:01:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-21 05:01:12,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 05:01:12,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606861292] [2023-12-21 05:01:12,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606861292] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 05:01:12,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326575989] [2023-12-21 05:01:12,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 05:01:12,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:01:12,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 05:01:12,240 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 05:01:12,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-12-21 05:01:12,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 05:01:12,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 05:01:12,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 58 conjunts are in the unsatisfiable core [2023-12-21 05:01:12,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 05:01:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-21 05:01:12,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 05:01:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-12-21 05:01:12,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326575989] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 05:01:12,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 05:01:12,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 14] total 43 [2023-12-21 05:01:12,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008081083] [2023-12-21 05:01:12,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 05:01:12,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-21 05:01:12,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 05:01:12,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-21 05:01:12,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2023-12-21 05:01:12,800 INFO L87 Difference]: Start difference. First operand 660 states and 832 transitions. Second operand has 43 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 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 05:01:23,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 05:01:23,647 INFO L93 Difference]: Finished difference Result 1285 states and 1610 transitions. [2023-12-21 05:01:23,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2023-12-21 05:01:23,648 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 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 42 [2023-12-21 05:01:23,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 05:01:23,650 INFO L225 Difference]: With dead ends: 1285 [2023-12-21 05:01:23,650 INFO L226 Difference]: Without dead ends: 991 [2023-12-21 05:01:23,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7432 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1482, Invalid=23324, Unknown=0, NotChecked=0, Total=24806 [2023-12-21 05:01:23,652 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 278 mSDsluCounter, 2021 mSDsCounter, 0 mSdLazyCounter, 3106 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 2112 SdHoareTripleChecker+Invalid, 3398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 3106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-21 05:01:23,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 2112 Invalid, 3398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 3106 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-21 05:01:23,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2023-12-21 05:01:24,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 599. [2023-12-21 05:01:24,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 1.2909698996655519) internal successors, (772), 598 states have internal predecessors, (772), 0 states have call successors, (0), 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 05:01:24,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 772 transitions. [2023-12-21 05:01:24,173 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 772 transitions. Word has length 42 [2023-12-21 05:01:24,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 05:01:24,173 INFO L495 AbstractCegarLoop]: Abstraction has 599 states and 772 transitions. [2023-12-21 05:01:24,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 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 05:01:24,173 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 772 transitions. [2023-12-21 05:01:24,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-21 05:01:24,174 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 05:01:24,174 INFO L195 NwaCegarLoop]: trace histogram [17, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 05:01:24,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-12-21 05:01:24,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-12-21 05:01:24,379 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 05:01:24,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 05:01:24,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1220518553, now seen corresponding path program 17 times [2023-12-21 05:01:24,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 05:01:24,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305826976] [2023-12-21 05:01:24,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:01:24,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 05:01:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 05:01:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-21 05:01:24,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 05:01:24,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305826976] [2023-12-21 05:01:24,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305826976] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 05:01:24,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130206842] [2023-12-21 05:01:24,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 05:01:24,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:01:24,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 05:01:24,709 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 05:01:24,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-12-21 05:01:28,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-12-21 05:01:28,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 05:01:28,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 93 conjunts are in the unsatisfiable core [2023-12-21 05:01:28,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 05:01:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 05:01:28,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 05:01:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-12-21 05:01:29,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130206842] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 05:01:29,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 05:01:29,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 36, 21] total 62 [2023-12-21 05:01:29,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443646658] [2023-12-21 05:01:29,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 05:01:29,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-12-21 05:01:29,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 05:01:29,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-12-21 05:01:29,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=3204, Unknown=0, NotChecked=0, Total=3782 [2023-12-21 05:01:29,301 INFO L87 Difference]: Start difference. First operand 599 states and 772 transitions. Second operand has 62 states, 62 states have (on average 1.3548387096774193) internal successors, (84), 62 states have internal predecessors, (84), 0 states have call successors, (0), 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 05:01:48,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 05:01:48,963 INFO L93 Difference]: Finished difference Result 1418 states and 1851 transitions. [2023-12-21 05:01:48,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2023-12-21 05:01:48,964 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.3548387096774193) internal successors, (84), 62 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-12-21 05:01:48,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 05:01:48,966 INFO L225 Difference]: With dead ends: 1418 [2023-12-21 05:01:48,967 INFO L226 Difference]: Without dead ends: 1220 [2023-12-21 05:01:48,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22364 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=5814, Invalid=56436, Unknown=0, NotChecked=0, Total=62250 [2023-12-21 05:01:48,969 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 449 mSDsluCounter, 2109 mSDsCounter, 0 mSdLazyCounter, 7360 mSolverCounterSat, 857 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 2195 SdHoareTripleChecker+Invalid, 8217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 857 IncrementalHoareTripleChecker+Valid, 7360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-12-21 05:01:48,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 2195 Invalid, 8217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [857 Valid, 7360 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-12-21 05:01:48,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2023-12-21 05:01:49,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 586. [2023-12-21 05:01:49,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 1.3247863247863247) internal successors, (775), 585 states have internal predecessors, (775), 0 states have call successors, (0), 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 05:01:49,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 775 transitions. [2023-12-21 05:01:49,524 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 775 transitions. Word has length 44 [2023-12-21 05:01:49,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 05:01:49,524 INFO L495 AbstractCegarLoop]: Abstraction has 586 states and 775 transitions. [2023-12-21 05:01:49,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.3548387096774193) internal successors, (84), 62 states have internal predecessors, (84), 0 states have call successors, (0), 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 05:01:49,524 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 775 transitions. [2023-12-21 05:01:49,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-21 05:01:49,525 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 05:01:49,525 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 05:01:49,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-12-21 05:01:49,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:01:49,732 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 05:01:49,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 05:01:49,733 INFO L85 PathProgramCache]: Analyzing trace with hash 302468341, now seen corresponding path program 15 times [2023-12-21 05:01:49,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 05:01:49,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270769816] [2023-12-21 05:01:49,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:01:49,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 05:01:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 05:01:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-21 05:01:50,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 05:01:50,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270769816] [2023-12-21 05:01:50,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270769816] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 05:01:50,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682019654] [2023-12-21 05:01:50,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 05:01:50,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:01:50,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 05:01:50,067 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 05:01:50,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-12-21 05:01:50,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-21 05:01:50,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 05:01:50,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-21 05:01:50,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 05:01:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-12-21 05:01:50,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 05:01:51,135 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-12-21 05:01:51,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682019654] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 05:01:51,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 05:01:51,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13, 13] total 47 [2023-12-21 05:01:51,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124412176] [2023-12-21 05:01:51,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 05:01:51,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-21 05:01:51,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 05:01:51,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-21 05:01:51,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1944, Unknown=0, NotChecked=0, Total=2162 [2023-12-21 05:01:51,137 INFO L87 Difference]: Start difference. First operand 586 states and 775 transitions. Second operand has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 47 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:04:57,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 05:04:57,076 INFO L93 Difference]: Finished difference Result 1330 states and 1772 transitions. [2023-12-21 05:04:57,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 313 states. [2023-12-21 05:04:57,076 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 47 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-12-21 05:04:57,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 05:04:57,079 INFO L225 Difference]: With dead ends: 1330 [2023-12-21 05:04:57,079 INFO L226 Difference]: Without dead ends: 1178 [2023-12-21 05:04:57,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43746 ImplicationChecksByTransitivity, 179.8s TimeCoverageRelationStatistics Valid=10068, Invalid=100487, Unknown=1, NotChecked=0, Total=110556 [2023-12-21 05:04:57,084 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 634 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 3776 mSolverCounterSat, 717 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 4493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 717 IncrementalHoareTripleChecker+Valid, 3776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-12-21 05:04:57,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 965 Invalid, 4493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [717 Valid, 3776 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-12-21 05:04:57,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2023-12-21 05:04:57,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 606. [2023-12-21 05:04:57,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 1.3702479338842974) internal successors, (829), 605 states have internal predecessors, (829), 0 states have call successors, (0), 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 05:04:57,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 829 transitions. [2023-12-21 05:04:57,580 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 829 transitions. Word has length 45 [2023-12-21 05:04:57,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 05:04:57,580 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 829 transitions. [2023-12-21 05:04:57,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 47 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:04:57,581 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 829 transitions. [2023-12-21 05:04:57,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-21 05:04:57,581 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 05:04:57,581 INFO L195 NwaCegarLoop]: trace histogram [18, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 05:04:57,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-12-21 05:04:57,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-12-21 05:04:57,786 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 05:04:57,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 05:04:57,787 INFO L85 PathProgramCache]: Analyzing trace with hash -664091339, now seen corresponding path program 18 times [2023-12-21 05:04:57,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 05:04:57,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792059320] [2023-12-21 05:04:57,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:04:57,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 05:04:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 05:04:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-21 05:04:58,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 05:04:58,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792059320] [2023-12-21 05:04:58,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792059320] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 05:04:58,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277813022] [2023-12-21 05:04:58,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 05:04:58,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:04:58,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 05:04:58,114 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 05:04:58,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-12-21 05:04:58,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-21 05:04:58,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 05:04:58,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-21 05:04:58,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 05:04:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2023-12-21 05:04:58,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 05:04:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2023-12-21 05:04:58,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277813022] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 05:04:58,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 05:04:58,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 8, 8] total 39 [2023-12-21 05:04:58,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220815756] [2023-12-21 05:04:58,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 05:04:58,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-21 05:04:58,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 05:04:58,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-21 05:04:58,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1336, Unknown=0, NotChecked=0, Total=1482 [2023-12-21 05:04:58,685 INFO L87 Difference]: Start difference. First operand 606 states and 829 transitions. Second operand has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 39 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:05:16,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 05:05:16,991 INFO L93 Difference]: Finished difference Result 2062 states and 2889 transitions. [2023-12-21 05:05:16,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 294 states. [2023-12-21 05:05:16,991 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 39 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-12-21 05:05:16,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 05:05:16,995 INFO L225 Difference]: With dead ends: 2062 [2023-12-21 05:05:16,996 INFO L226 Difference]: Without dead ends: 1839 [2023-12-21 05:05:16,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35397 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=4325, Invalid=87787, Unknown=0, NotChecked=0, Total=92112 [2023-12-21 05:05:16,999 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 446 mSDsluCounter, 1904 mSDsCounter, 0 mSdLazyCounter, 7512 mSolverCounterSat, 576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 1975 SdHoareTripleChecker+Invalid, 8088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 576 IncrementalHoareTripleChecker+Valid, 7512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-21 05:05:16,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 1975 Invalid, 8088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [576 Valid, 7512 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-12-21 05:05:17,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2023-12-21 05:05:18,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1066. [2023-12-21 05:05:18,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 1065 states have (on average 1.3906103286384977) internal successors, (1481), 1065 states have internal predecessors, (1481), 0 states have call successors, (0), 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 05:05:18,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1481 transitions. [2023-12-21 05:05:18,003 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1481 transitions. Word has length 46 [2023-12-21 05:05:18,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 05:05:18,004 INFO L495 AbstractCegarLoop]: Abstraction has 1066 states and 1481 transitions. [2023-12-21 05:05:18,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 39 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:05:18,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1481 transitions. [2023-12-21 05:05:18,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-21 05:05:18,005 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 05:05:18,005 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 05:05:18,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-12-21 05:05:18,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-12-21 05:05:18,210 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 05:05:18,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 05:05:18,210 INFO L85 PathProgramCache]: Analyzing trace with hash -2004063661, now seen corresponding path program 16 times [2023-12-21 05:05:18,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 05:05:18,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101292814] [2023-12-21 05:05:18,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:05:18,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 05:05:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 05:05:18,540 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-21 05:05:18,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 05:05:18,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101292814] [2023-12-21 05:05:18,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101292814] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 05:05:18,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127370029] [2023-12-21 05:05:18,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 05:05:18,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:05:18,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 05:05:18,542 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 05:05:18,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-12-21 05:05:18,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 05:05:18,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 05:05:18,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-21 05:05:18,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 05:05:18,975 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 35 proven. 97 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-21 05:05:18,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 05:05:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 35 proven. 97 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-21 05:05:19,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127370029] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 05:05:19,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 05:05:19,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14, 14] total 39 [2023-12-21 05:05:19,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661691941] [2023-12-21 05:05:19,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 05:05:19,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-21 05:05:19,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 05:05:19,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-21 05:05:19,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2023-12-21 05:05:19,599 INFO L87 Difference]: Start difference. First operand 1066 states and 1481 transitions. Second operand has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 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 05:07:56,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 05:07:56,567 INFO L93 Difference]: Finished difference Result 1457 states and 2060 transitions. [2023-12-21 05:07:56,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2023-12-21 05:07:56,567 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-12-21 05:07:56,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 05:07:56,570 INFO L225 Difference]: With dead ends: 1457 [2023-12-21 05:07:56,570 INFO L226 Difference]: Without dead ends: 1258 [2023-12-21 05:07:56,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 70 SyntacticMatches, 22 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11309 ImplicationChecksByTransitivity, 150.0s TimeCoverageRelationStatistics Valid=3520, Invalid=32770, Unknown=0, NotChecked=0, Total=36290 [2023-12-21 05:07:56,594 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 194 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 3792 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 4083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 3792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-12-21 05:07:56,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 239 Invalid, 4083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 3792 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2023-12-21 05:07:56,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2023-12-21 05:07:57,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1043. [2023-12-21 05:07:57,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1042 states have (on average 1.3512476007677543) internal successors, (1408), 1042 states have internal predecessors, (1408), 0 states have call successors, (0), 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 05:07:57,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1408 transitions. [2023-12-21 05:07:57,554 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1408 transitions. Word has length 47 [2023-12-21 05:07:57,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 05:07:57,555 INFO L495 AbstractCegarLoop]: Abstraction has 1043 states and 1408 transitions. [2023-12-21 05:07:57,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 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 05:07:57,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1408 transitions. [2023-12-21 05:07:57,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-21 05:07:57,556 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 05:07:57,556 INFO L195 NwaCegarLoop]: trace histogram [19, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 05:07:57,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-12-21 05:07:57,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-12-21 05:07:57,760 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 05:07:57,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 05:07:57,760 INFO L85 PathProgramCache]: Analyzing trace with hash 513891556, now seen corresponding path program 19 times [2023-12-21 05:07:57,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 05:07:57,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527318224] [2023-12-21 05:07:57,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:07:57,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 05:07:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 05:07:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-21 05:07:58,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 05:07:58,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527318224] [2023-12-21 05:07:58,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527318224] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 05:07:58,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523354311] [2023-12-21 05:07:58,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 05:07:58,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:07:58,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 05:07:58,168 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 05:07:58,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-12-21 05:07:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 05:07:58,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 60 conjunts are in the unsatisfiable core [2023-12-21 05:07:58,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 05:07:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-21 05:07:58,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 05:07:58,635 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-12-21 05:07:58,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523354311] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 05:07:58,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 05:07:58,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 12] total 44 [2023-12-21 05:07:58,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392489581] [2023-12-21 05:07:58,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 05:07:58,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-21 05:07:58,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 05:07:58,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-21 05:07:58,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1541, Unknown=0, NotChecked=0, Total=1892 [2023-12-21 05:07:58,636 INFO L87 Difference]: Start difference. First operand 1043 states and 1408 transitions. Second operand has 44 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 44 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:08:04,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 05:08:04,275 INFO L93 Difference]: Finished difference Result 2310 states and 3097 transitions. [2023-12-21 05:08:04,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-12-21 05:08:04,275 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 44 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-12-21 05:08:04,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 05:08:04,280 INFO L225 Difference]: With dead ends: 2310 [2023-12-21 05:08:04,280 INFO L226 Difference]: Without dead ends: 1933 [2023-12-21 05:08:04,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1839, Invalid=5817, Unknown=0, NotChecked=0, Total=7656 [2023-12-21 05:08:04,281 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 778 mSDsluCounter, 2256 mSDsCounter, 0 mSdLazyCounter, 3706 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 2359 SdHoareTripleChecker+Invalid, 3983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 3706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-21 05:08:04,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 2359 Invalid, 3983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 3706 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-21 05:08:04,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2023-12-21 05:08:05,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1068. [2023-12-21 05:08:05,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 1.338331771321462) internal successors, (1428), 1067 states have internal predecessors, (1428), 0 states have call successors, (0), 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 05:08:05,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1428 transitions. [2023-12-21 05:08:05,304 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1428 transitions. Word has length 49 [2023-12-21 05:08:05,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 05:08:05,304 INFO L495 AbstractCegarLoop]: Abstraction has 1068 states and 1428 transitions. [2023-12-21 05:08:05,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 44 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:08:05,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1428 transitions. [2023-12-21 05:08:05,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-21 05:08:05,305 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 05:08:05,305 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 05:08:05,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-12-21 05:08:05,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:08:05,511 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 05:08:05,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 05:08:05,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1865598345, now seen corresponding path program 17 times [2023-12-21 05:08:05,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 05:08:05,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468391541] [2023-12-21 05:08:05,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:08:05,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 05:08:05,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 05:08:05,875 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-12-21 05:08:05,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 05:08:05,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468391541] [2023-12-21 05:08:05,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468391541] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 05:08:05,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760317081] [2023-12-21 05:08:05,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 05:08:05,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:08:05,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 05:08:05,884 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 05:08:05,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-12-21 05:08:16,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-21 05:08:16,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 05:08:16,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 74 conjunts are in the unsatisfiable core [2023-12-21 05:08:16,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 05:08:16,935 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-12-21 05:08:16,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 05:08:17,748 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-12-21 05:08:17,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760317081] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 05:08:17,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 05:08:17,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 63 [2023-12-21 05:08:17,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167254226] [2023-12-21 05:08:17,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 05:08:17,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-12-21 05:08:17,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 05:08:17,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-12-21 05:08:17,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=3445, Unknown=0, NotChecked=0, Total=3906 [2023-12-21 05:08:17,750 INFO L87 Difference]: Start difference. First operand 1068 states and 1428 transitions. Second operand has 63 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 63 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 05:08:28,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-12-21 05:08:28,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=712, Invalid=4988, Unknown=0, NotChecked=0, Total=5700 [2023-12-21 05:08:28,600 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 05:08:28,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 67 Invalid, 1373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1358 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 05:08:28,600 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 05:08:28,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-12-21 05:08:28,610 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 05:08:28,639 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-21 05:08:28,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:08:28,801 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (1068states) and FLOYD_HOARE automaton (currently 52 states, 63 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 76 known predicates. [2023-12-21 05:08:28,805 INFO L445 BasicCegarLoop]: Path program histogram: [19, 17, 9, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 05:08:28,807 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 05:08:28,813 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 05:08:28 BoogieIcfgContainer [2023-12-21 05:08:28,813 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 05:08:28,813 INFO L158 Benchmark]: Toolchain (without parser) took 874300.90ms. Allocated memory was 281.0MB in the beginning and 619.7MB in the end (delta: 338.7MB). Free memory was 230.2MB in the beginning and 433.3MB in the end (delta: -203.2MB). Peak memory consumption was 136.4MB. Max. memory is 8.0GB. [2023-12-21 05:08:28,813 INFO L158 Benchmark]: CDTParser took 0.57ms. Allocated memory is still 204.5MB. Free memory is still 156.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 05:08:28,813 INFO L158 Benchmark]: CACSL2BoogieTranslator took 164.96ms. Allocated memory is still 281.0MB. Free memory was 230.0MB in the beginning and 219.0MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-21 05:08:28,814 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.12ms. Allocated memory is still 281.0MB. Free memory was 219.0MB in the beginning and 217.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-21 05:08:28,814 INFO L158 Benchmark]: Boogie Preprocessor took 27.16ms. Allocated memory is still 281.0MB. Free memory was 217.6MB in the beginning and 215.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 05:08:28,814 INFO L158 Benchmark]: RCFGBuilder took 208.44ms. Allocated memory is still 281.0MB. Free memory was 215.9MB in the beginning and 204.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-21 05:08:28,818 INFO L158 Benchmark]: TraceAbstraction took 873869.98ms. Allocated memory was 281.0MB in the beginning and 619.7MB in the end (delta: 338.7MB). Free memory was 204.0MB in the beginning and 433.3MB in the end (delta: -229.4MB). Peak memory consumption was 110.2MB. Max. memory is 8.0GB. [2023-12-21 05:08:28,818 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.57ms. Allocated memory is still 204.5MB. Free memory is still 156.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 164.96ms. Allocated memory is still 281.0MB. Free memory was 230.0MB in the beginning and 219.0MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.12ms. Allocated memory is still 281.0MB. Free memory was 219.0MB in the beginning and 217.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.16ms. Allocated memory is still 281.0MB. Free memory was 217.6MB in the beginning and 215.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 208.44ms. Allocated memory is still 281.0MB. Free memory was 215.9MB in the beginning and 204.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 873869.98ms. Allocated memory was 281.0MB in the beginning and 619.7MB in the end (delta: 338.7MB). Free memory was 204.0MB in the beginning and 433.3MB in the end (delta: -229.4MB). Peak memory consumption was 110.2MB. 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 (1068states) and FLOYD_HOARE automaton (currently 52 states, 63 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 76 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 873.8s, OverallIterations: 52, TraceHistogramMax: 19, PathProgramHistogramMax: 19, EmptinessCheckTime: 0.1s, AutomataDifference: 809.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9086 SdHoareTripleChecker+Valid, 66.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9086 mSDsluCounter, 26522 SdHoareTripleChecker+Invalid, 60.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 24932 mSDsCounter, 8775 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 84462 IncrementalHoareTripleChecker+Invalid, 93237 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8775 mSolverCounterUnsat, 1590 mSDtfsCounter, 84462 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6725 GetRequests, 2193 SyntacticMatches, 212 SemanticMatches, 4319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248740 ImplicationChecksByTransitivity, 735.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1068occurred in iteration=51, InterpolantAutomatonStates: 3847, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 10.6s AutomataMinimizationTime, 51 MinimizatonAttempts, 8048 StatesRemovedByMinimization, 36 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 16.9s SatisfiabilityAnalysisTime, 24.6s InterpolantComputationTime, 2854 NumberOfCodeBlocks, 2826 NumberOfCodeBlocksAsserted, 192 NumberOfCheckSat, 4108 ConstructedInterpolants, 0 QuantifiedInterpolants, 17335 SizeOfPredicates, 32 NumberOfNonLiveVariables, 6343 ConjunctsInSsa, 1505 ConjunctsInUnsatCore, 146 InterpolantComputations, 7 PerfectInterpolantSequences, 5101/11761 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