/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver External_ModelsAndUnsatCoreMode --traceabstraction.command.for.external.solver 'z3 -smt2 -in SMTLIB2_COMPLIANT=true' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_4-2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-10-31 17:25:16,579 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 17:25:16,647 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-10-31 17:25:16,674 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 17:25:16,674 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 17:25:16,675 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 17:25:16,675 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 17:25:16,675 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 17:25:16,676 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 17:25:16,676 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 17:25:16,676 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 17:25:16,676 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 17:25:16,677 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 17:25:16,677 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 17:25:16,677 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 17:25:16,677 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 17:25:16,678 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 17:25:16,678 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 17:25:16,678 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 17:25:16,678 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 17:25:16,679 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-31 17:25:16,679 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 17:25:16,679 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-31 17:25:16,679 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 17:25:16,680 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 17:25:16,680 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 17:25:16,680 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 17:25:16,680 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 17:25:16,681 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 17:25:16,681 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 17:25:16,681 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 17:25:16,681 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 17:25:16,682 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 17:25:16,682 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 17:25:16,682 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-31 17:25:16,682 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-31 17:25:16,682 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 17:25:16,683 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 17:25:16,683 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 17:25:16,683 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 17:25:16,683 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-31 17:25:16,684 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:17,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 17:25:17,026 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 17:25:17,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 17:25:17,032 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 17:25:17,032 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 17:25:17,034 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_4-2a.c.cil.c [2024-10-31 17:25:18,299 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 17:25:18,473 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 17:25:18,473 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-2a.c.cil.c [2024-10-31 17:25:18,482 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/251755e84/29bf8ea86b82485d86ab32a0d437ca6b/FLAG99c5c93e4 [2024-10-31 17:25:18,881 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/251755e84/29bf8ea86b82485d86ab32a0d437ca6b [2024-10-31 17:25:18,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 17:25:18,885 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-10-31 17:25:18,886 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 17:25:18,886 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 17:25:18,889 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 17:25:18,890 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 05:25:18" (1/1) ... [2024-10-31 17:25:18,891 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13af782e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:18, skipping insertion in model container [2024-10-31 17:25:18,891 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 05:25:18" (1/1) ... [2024-10-31 17:25:18,911 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 17:25:19,063 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-2a.c.cil.c[755,768] [2024-10-31 17:25:19,118 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 17:25:19,128 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 17:25:19,141 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-2a.c.cil.c[755,768] [2024-10-31 17:25:19,173 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 17:25:19,192 INFO L204 MainTranslator]: Completed translation [2024-10-31 17:25:19,194 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:19 WrapperNode [2024-10-31 17:25:19,195 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 17:25:19,196 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 17:25:19,196 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 17:25:19,196 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 17:25:19,202 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:19" (1/1) ... [2024-10-31 17:25:19,210 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:19" (1/1) ... [2024-10-31 17:25:19,228 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2024-10-31 17:25:19,228 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 17:25:19,229 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 17:25:19,229 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 17:25:19,229 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 17:25:19,240 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:19" (1/1) ... [2024-10-31 17:25:19,240 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:19" (1/1) ... [2024-10-31 17:25:19,245 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:19" (1/1) ... [2024-10-31 17:25:19,264 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]. [2024-10-31 17:25:19,264 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:19" (1/1) ... [2024-10-31 17:25:19,264 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:19" (1/1) ... [2024-10-31 17:25:19,274 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:19" (1/1) ... [2024-10-31 17:25:19,282 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:19" (1/1) ... [2024-10-31 17:25:19,286 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:19" (1/1) ... [2024-10-31 17:25:19,288 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:19" (1/1) ... [2024-10-31 17:25:19,290 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 17:25:19,293 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 17:25:19,294 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 17:25:19,294 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 17:25:19,295 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:19" (1/1) ... [2024-10-31 17:25:19,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 17:25:19,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:19,327 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) [2024-10-31 17:25:19,331 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 [2024-10-31 17:25:19,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 17:25:19,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-31 17:25:19,354 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-10-31 17:25:19,354 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-10-31 17:25:19,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 17:25:19,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 17:25:19,354 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2024-10-31 17:25:19,354 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2024-10-31 17:25:19,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-31 17:25:19,354 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-31 17:25:19,423 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 17:25:19,424 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 17:25:19,671 INFO L? ?]: Removed 34 outVars from TransFormulas that were not future-live. [2024-10-31 17:25:19,671 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 17:25:19,688 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 17:25:19,688 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 17:25:19,688 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 05:25:19 BoogieIcfgContainer [2024-10-31 17:25:19,689 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 17:25:19,691 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 17:25:19,691 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 17:25:19,695 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 17:25:19,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 05:25:18" (1/3) ... [2024-10-31 17:25:19,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a95e0d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 05:25:19, skipping insertion in model container [2024-10-31 17:25:19,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:19" (2/3) ... [2024-10-31 17:25:19,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a95e0d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 05:25:19, skipping insertion in model container [2024-10-31 17:25:19,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 05:25:19" (3/3) ... [2024-10-31 17:25:19,699 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2024-10-31 17:25:19,715 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 17:25:19,715 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 17:25:19,774 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 17:25:19,780 INFO L333 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, 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;@6051dcd9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 17:25:19,780 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 17:25:19,785 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 17:25:19,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-31 17:25:19,793 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:19,794 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:19,795 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:19,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:19,799 INFO L85 PathProgramCache]: Analyzing trace with hash -2030319843, now seen corresponding path program 1 times [2024-10-31 17:25:19,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:19,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474201246] [2024-10-31 17:25:19,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:19,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:19,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:19,813 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) [2024-10-31 17:25:19,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 17:25:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:19,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 17:25:19,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 17:25:20,050 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 17:25:20,127 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:20,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474201246] [2024-10-31 17:25:20,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1474201246] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:25:20,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:25:20,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2024-10-31 17:25:20,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712892375] [2024-10-31 17:25:20,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:25:20,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 17:25:20,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:20,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 17:25:20,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-31 17:25:20,158 INFO L87 Difference]: Start difference. First operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 17:25:20,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:20,334 INFO L93 Difference]: Finished difference Result 128 states and 196 transitions. [2024-10-31 17:25:20,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 17:25:20,336 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-10-31 17:25:20,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:20,345 INFO L225 Difference]: With dead ends: 128 [2024-10-31 17:25:20,345 INFO L226 Difference]: Without dead ends: 71 [2024-10-31 17:25:20,350 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-10-31 17:25:20,355 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 15 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:20,356 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 502 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 17:25:20,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-10-31 17:25:20,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2024-10-31 17:25:20,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 49 states have internal predecessors, (62), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2024-10-31 17:25:20,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2024-10-31 17:25:20,394 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 31 [2024-10-31 17:25:20,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:20,395 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2024-10-31 17:25:20,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 17:25:20,395 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2024-10-31 17:25:20,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-31 17:25:20,397 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:20,397 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:20,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 17:25:20,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:20,598 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:20,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:20,599 INFO L85 PathProgramCache]: Analyzing trace with hash 565485640, now seen corresponding path program 1 times [2024-10-31 17:25:20,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:20,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119620546] [2024-10-31 17:25:20,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:20,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:20,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:20,601 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) [2024-10-31 17:25:20,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 17:25:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:20,666 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 17:25:20,668 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 17:25:20,742 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:20,799 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 17:25:20,800 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:20,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119620546] [2024-10-31 17:25:20,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2119620546] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:25:20,802 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:25:20,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2024-10-31 17:25:20,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724148511] [2024-10-31 17:25:20,802 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:20,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 17:25:20,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:20,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 17:25:20,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-31 17:25:20,805 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:20,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:20,894 INFO L93 Difference]: Finished difference Result 118 states and 155 transitions. [2024-10-31 17:25:20,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 17:25:20,896 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-10-31 17:25:20,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:20,898 INFO L225 Difference]: With dead ends: 118 [2024-10-31 17:25:20,898 INFO L226 Difference]: Without dead ends: 86 [2024-10-31 17:25:20,899 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-31 17:25:20,900 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 13 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:20,900 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 419 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 17:25:20,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-10-31 17:25:20,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2024-10-31 17:25:20,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 55 states have internal predecessors, (68), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2024-10-31 17:25:20,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2024-10-31 17:25:20,914 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 35 [2024-10-31 17:25:20,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:20,914 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2024-10-31 17:25:20,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:20,914 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2024-10-31 17:25:20,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-31 17:25:20,915 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:20,915 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:20,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 17:25:21,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:21,117 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:21,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:21,117 INFO L85 PathProgramCache]: Analyzing trace with hash -686479404, now seen corresponding path program 1 times [2024-10-31 17:25:21,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:21,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671706939] [2024-10-31 17:25:21,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:21,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:21,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:21,119 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) [2024-10-31 17:25:21,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 17:25:21,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:21,173 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 17:25:21,175 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 17:25:21,234 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:21,286 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 17:25:21,287 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:21,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671706939] [2024-10-31 17:25:21,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1671706939] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:25:21,287 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:25:21,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 9 [2024-10-31 17:25:21,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261726957] [2024-10-31 17:25:21,287 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:21,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 17:25:21,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:21,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 17:25:21,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-31 17:25:21,288 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 17:25:21,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:21,392 INFO L93 Difference]: Finished difference Result 108 states and 141 transitions. [2024-10-31 17:25:21,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 17:25:21,393 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2024-10-31 17:25:21,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:21,395 INFO L225 Difference]: With dead ends: 108 [2024-10-31 17:25:21,395 INFO L226 Difference]: Without dead ends: 85 [2024-10-31 17:25:21,395 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-10-31 17:25:21,396 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 13 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:21,396 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 501 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 17:25:21,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-10-31 17:25:21,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2024-10-31 17:25:21,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 59 states have (on average 1.271186440677966) internal successors, (75), 61 states have internal predecessors, (75), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2024-10-31 17:25:21,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2024-10-31 17:25:21,407 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 39 [2024-10-31 17:25:21,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:21,407 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2024-10-31 17:25:21,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 17:25:21,407 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2024-10-31 17:25:21,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-31 17:25:21,408 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:21,408 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:21,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 17:25:21,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:21,609 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:21,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:21,610 INFO L85 PathProgramCache]: Analyzing trace with hash 461161469, now seen corresponding path program 2 times [2024-10-31 17:25:21,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:21,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651327646] [2024-10-31 17:25:21,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:21,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:21,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:21,611 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) [2024-10-31 17:25:21,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 17:25:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:21,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 17:25:21,656 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 17:25:21,769 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:21,852 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 17:25:21,852 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:21,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651327646] [2024-10-31 17:25:21,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [651327646] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:25:21,853 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:25:21,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2024-10-31 17:25:21,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140071871] [2024-10-31 17:25:21,853 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:21,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 17:25:21,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:21,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 17:25:21,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-31 17:25:21,854 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:22,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-10-31 17:25:22,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:22,968 INFO L93 Difference]: Finished difference Result 88 states and 111 transitions. [2024-10-31 17:25:22,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 17:25:22,969 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2024-10-31 17:25:22,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:22,970 INFO L225 Difference]: With dead ends: 88 [2024-10-31 17:25:22,970 INFO L226 Difference]: Without dead ends: 86 [2024-10-31 17:25:22,970 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-31 17:25:22,971 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 3 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:22,971 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 484 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-31 17:25:22,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-10-31 17:25:22,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2024-10-31 17:25:22,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 64 states have internal predecessors, (78), 12 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2024-10-31 17:25:22,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2024-10-31 17:25:22,988 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 39 [2024-10-31 17:25:22,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:22,988 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2024-10-31 17:25:22,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 17:25:22,988 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2024-10-31 17:25:22,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 17:25:22,990 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:22,990 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:23,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 17:25:23,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:23,194 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:23,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:23,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1863687100, now seen corresponding path program 1 times [2024-10-31 17:25:23,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:23,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305411793] [2024-10-31 17:25:23,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:23,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:23,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:23,196 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) [2024-10-31 17:25:23,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 17:25:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:23,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 17:25:23,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 17:25:23,341 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:23,427 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 17:25:23,428 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:23,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305411793] [2024-10-31 17:25:23,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [305411793] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:25:23,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:25:23,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2024-10-31 17:25:23,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046090468] [2024-10-31 17:25:23,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:25:23,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 17:25:23,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:23,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 17:25:23,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-31 17:25:23,430 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 17:25:23,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:23,500 INFO L93 Difference]: Finished difference Result 117 states and 149 transitions. [2024-10-31 17:25:23,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 17:25:23,501 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2024-10-31 17:25:23,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:23,502 INFO L225 Difference]: With dead ends: 117 [2024-10-31 17:25:23,502 INFO L226 Difference]: Without dead ends: 106 [2024-10-31 17:25:23,502 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-31 17:25:23,503 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 18 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:23,503 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 467 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 17:25:23,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-10-31 17:25:23,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2024-10-31 17:25:23,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 75 states have internal predecessors, (88), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 14 states have call predecessors, (21), 14 states have call successors, (21) [2024-10-31 17:25:23,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 124 transitions. [2024-10-31 17:25:23,514 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 124 transitions. Word has length 44 [2024-10-31 17:25:23,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:23,514 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 124 transitions. [2024-10-31 17:25:23,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 17:25:23,514 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 124 transitions. [2024-10-31 17:25:23,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 17:25:23,519 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:23,519 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:23,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-31 17:25:23,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:23,720 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:23,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:23,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1162622522, now seen corresponding path program 1 times [2024-10-31 17:25:23,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:23,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872766698] [2024-10-31 17:25:23,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:23,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:23,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:23,722 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) [2024-10-31 17:25:23,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 17:25:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:23,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 17:25:23,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 17:25:23,879 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 17:25:24,044 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:24,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872766698] [2024-10-31 17:25:24,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1872766698] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:25:24,045 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:25:24,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 14 [2024-10-31 17:25:24,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387538226] [2024-10-31 17:25:24,045 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:24,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 17:25:24,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:24,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 17:25:24,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-10-31 17:25:24,047 INFO L87 Difference]: Start difference. First operand 97 states and 124 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-31 17:25:24,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:24,273 INFO L93 Difference]: Finished difference Result 131 states and 168 transitions. [2024-10-31 17:25:24,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 17:25:24,274 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2024-10-31 17:25:24,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:24,275 INFO L225 Difference]: With dead ends: 131 [2024-10-31 17:25:24,275 INFO L226 Difference]: Without dead ends: 124 [2024-10-31 17:25:24,276 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-10-31 17:25:24,276 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 35 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:24,277 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 625 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 17:25:24,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-10-31 17:25:24,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2024-10-31 17:25:24,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 76 states have internal predecessors, (90), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2024-10-31 17:25:24,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2024-10-31 17:25:24,295 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 44 [2024-10-31 17:25:24,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:24,295 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2024-10-31 17:25:24,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-31 17:25:24,296 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2024-10-31 17:25:24,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-31 17:25:24,297 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:24,297 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:24,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 17:25:24,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:24,498 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:24,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:24,498 INFO L85 PathProgramCache]: Analyzing trace with hash -977013140, now seen corresponding path program 1 times [2024-10-31 17:25:24,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:24,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929143253] [2024-10-31 17:25:24,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:24,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:24,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:24,500 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) [2024-10-31 17:25:24,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 17:25:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:24,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 17:25:24,547 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 17:25:24,640 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 17:25:24,784 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:24,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929143253] [2024-10-31 17:25:24,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [929143253] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:25:24,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:25:24,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2024-10-31 17:25:24,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122991277] [2024-10-31 17:25:24,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:25:24,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 17:25:24,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:24,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 17:25:24,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-10-31 17:25:24,786 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 17:25:25,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:25,025 INFO L93 Difference]: Finished difference Result 138 states and 176 transitions. [2024-10-31 17:25:25,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 17:25:25,029 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2024-10-31 17:25:25,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:25,031 INFO L225 Difference]: With dead ends: 138 [2024-10-31 17:25:25,031 INFO L226 Difference]: Without dead ends: 130 [2024-10-31 17:25:25,031 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-10-31 17:25:25,032 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 23 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:25,032 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 728 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 17:25:25,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-10-31 17:25:25,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 110. [2024-10-31 17:25:25,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 84 states have internal predecessors, (100), 16 states have call successors, (16), 7 states have call predecessors, (16), 11 states have return successors, (23), 18 states have call predecessors, (23), 15 states have call successors, (23) [2024-10-31 17:25:25,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 139 transitions. [2024-10-31 17:25:25,054 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 139 transitions. Word has length 46 [2024-10-31 17:25:25,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:25,055 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 139 transitions. [2024-10-31 17:25:25,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 17:25:25,055 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 139 transitions. [2024-10-31 17:25:25,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-31 17:25:25,056 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:25,056 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:25,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 17:25:25,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:25,257 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:25,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:25,258 INFO L85 PathProgramCache]: Analyzing trace with hash -919754838, now seen corresponding path program 1 times [2024-10-31 17:25:25,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:25,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165637149] [2024-10-31 17:25:25,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:25,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:25,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:25,260 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) [2024-10-31 17:25:25,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 17:25:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:25,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 17:25:25,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-31 17:25:25,346 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-31 17:25:25,393 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:25,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165637149] [2024-10-31 17:25:25,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [165637149] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:25:25,393 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:25:25,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2024-10-31 17:25:25,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098187628] [2024-10-31 17:25:25,394 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:25,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 17:25:25,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:25,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 17:25:25,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-31 17:25:25,395 INFO L87 Difference]: Start difference. First operand 110 states and 139 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-10-31 17:25:25,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:25,429 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2024-10-31 17:25:25,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 17:25:25,429 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2024-10-31 17:25:25,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:25,430 INFO L225 Difference]: With dead ends: 118 [2024-10-31 17:25:25,430 INFO L226 Difference]: Without dead ends: 103 [2024-10-31 17:25:25,431 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-10-31 17:25:25,431 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 3 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:25,431 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 437 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 17:25:25,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-31 17:25:25,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2024-10-31 17:25:25,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 77 states have (on average 1.2077922077922079) internal successors, (93), 80 states have internal predecessors, (93), 14 states have call successors, (14), 7 states have call predecessors, (14), 11 states have return successors, (20), 15 states have call predecessors, (20), 13 states have call successors, (20) [2024-10-31 17:25:25,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2024-10-31 17:25:25,438 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 46 [2024-10-31 17:25:25,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:25,438 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2024-10-31 17:25:25,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-10-31 17:25:25,438 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2024-10-31 17:25:25,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-31 17:25:25,439 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:25,439 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:25,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-31 17:25:25,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:25,640 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:25,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:25,640 INFO L85 PathProgramCache]: Analyzing trace with hash -168643793, now seen corresponding path program 1 times [2024-10-31 17:25:25,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:25,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44346354] [2024-10-31 17:25:25,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:25,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:25,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:25,642 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) [2024-10-31 17:25:25,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 17:25:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:25,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 17:25:25,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 17:25:25,797 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 17:25:26,057 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:26,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44346354] [2024-10-31 17:25:26,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [44346354] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:25:26,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:25:26,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-10-31 17:25:26,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947871754] [2024-10-31 17:25:26,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:25:26,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-31 17:25:26,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:26,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-31 17:25:26,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2024-10-31 17:25:26,059 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-31 17:25:26,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:26,913 INFO L93 Difference]: Finished difference Result 150 states and 201 transitions. [2024-10-31 17:25:26,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-31 17:25:26,914 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-10-31 17:25:26,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:26,915 INFO L225 Difference]: With dead ends: 150 [2024-10-31 17:25:26,915 INFO L226 Difference]: Without dead ends: 137 [2024-10-31 17:25:26,916 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2024-10-31 17:25:26,916 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 55 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:26,917 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 1234 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-31 17:25:26,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-10-31 17:25:26,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 110. [2024-10-31 17:25:26,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 86 states have internal predecessors, (98), 16 states have call successors, (16), 7 states have call predecessors, (16), 12 states have return successors, (29), 16 states have call predecessors, (29), 14 states have call successors, (29) [2024-10-31 17:25:26,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 143 transitions. [2024-10-31 17:25:26,925 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 143 transitions. Word has length 48 [2024-10-31 17:25:26,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:26,925 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 143 transitions. [2024-10-31 17:25:26,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-31 17:25:26,925 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 143 transitions. [2024-10-31 17:25:26,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-31 17:25:26,926 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:26,926 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:26,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-31 17:25:27,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:27,127 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:27,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:27,127 INFO L85 PathProgramCache]: Analyzing trace with hash 291178745, now seen corresponding path program 2 times [2024-10-31 17:25:27,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:27,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985753418] [2024-10-31 17:25:27,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:27,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:27,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:27,128 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) [2024-10-31 17:25:27,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-31 17:25:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:27,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 17:25:27,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 17:25:27,290 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 17:25:27,563 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:27,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985753418] [2024-10-31 17:25:27,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1985753418] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:25:27,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:25:27,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-10-31 17:25:27,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596685307] [2024-10-31 17:25:27,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:25:27,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-31 17:25:27,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:27,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-31 17:25:27,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2024-10-31 17:25:27,565 INFO L87 Difference]: Start difference. First operand 110 states and 143 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-31 17:25:28,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:28,368 INFO L93 Difference]: Finished difference Result 149 states and 200 transitions. [2024-10-31 17:25:28,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-31 17:25:28,369 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-10-31 17:25:28,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:28,370 INFO L225 Difference]: With dead ends: 149 [2024-10-31 17:25:28,370 INFO L226 Difference]: Without dead ends: 134 [2024-10-31 17:25:28,371 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2024-10-31 17:25:28,371 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 71 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:28,372 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1260 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-31 17:25:28,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-10-31 17:25:28,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 108. [2024-10-31 17:25:28,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 83 states have internal predecessors, (95), 17 states have call successors, (17), 7 states have call predecessors, (17), 11 states have return successors, (31), 17 states have call predecessors, (31), 15 states have call successors, (31) [2024-10-31 17:25:28,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 143 transitions. [2024-10-31 17:25:28,391 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 143 transitions. Word has length 48 [2024-10-31 17:25:28,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:28,391 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 143 transitions. [2024-10-31 17:25:28,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-31 17:25:28,392 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 143 transitions. [2024-10-31 17:25:28,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-31 17:25:28,392 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:28,392 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:28,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-31 17:25:28,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:28,593 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:28,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:28,594 INFO L85 PathProgramCache]: Analyzing trace with hash -700670325, now seen corresponding path program 1 times [2024-10-31 17:25:28,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:28,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814123072] [2024-10-31 17:25:28,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:28,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:28,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:28,596 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) [2024-10-31 17:25:28,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-31 17:25:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:28,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 17:25:28,645 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:28,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-31 17:25:28,685 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:28,727 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 17:25:28,727 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:28,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814123072] [2024-10-31 17:25:28,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1814123072] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:25:28,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:25:28,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-10-31 17:25:28,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623073107] [2024-10-31 17:25:28,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:25:28,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 17:25:28,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:28,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 17:25:28,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-31 17:25:28,730 INFO L87 Difference]: Start difference. First operand 108 states and 143 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 17:25:28,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:28,806 INFO L93 Difference]: Finished difference Result 151 states and 189 transitions. [2024-10-31 17:25:28,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 17:25:28,806 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 53 [2024-10-31 17:25:28,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:28,807 INFO L225 Difference]: With dead ends: 151 [2024-10-31 17:25:28,807 INFO L226 Difference]: Without dead ends: 96 [2024-10-31 17:25:28,808 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-31 17:25:28,808 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 6 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:28,808 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 451 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 17:25:28,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-10-31 17:25:28,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-10-31 17:25:28,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 75 states have internal predecessors, (86), 14 states have call successors, (14), 6 states have call predecessors, (14), 10 states have return successors, (28), 14 states have call predecessors, (28), 13 states have call successors, (28) [2024-10-31 17:25:28,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 128 transitions. [2024-10-31 17:25:28,818 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 128 transitions. Word has length 53 [2024-10-31 17:25:28,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:28,819 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 128 transitions. [2024-10-31 17:25:28,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 17:25:28,819 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 128 transitions. [2024-10-31 17:25:28,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-31 17:25:28,820 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:28,820 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:28,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-31 17:25:29,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:29,021 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:29,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:29,021 INFO L85 PathProgramCache]: Analyzing trace with hash -744862915, now seen corresponding path program 1 times [2024-10-31 17:25:29,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:29,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709590843] [2024-10-31 17:25:29,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:29,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:29,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:29,023 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) [2024-10-31 17:25:29,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-31 17:25:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:29,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 17:25:29,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 17:25:29,285 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:29,471 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 17:25:29,471 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:29,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709590843] [2024-10-31 17:25:29,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1709590843] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 17:25:29,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 17:25:29,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 15 [2024-10-31 17:25:29,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896131372] [2024-10-31 17:25:29,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:29,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 17:25:29,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:29,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 17:25:29,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-10-31 17:25:29,472 INFO L87 Difference]: Start difference. First operand 96 states and 128 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 17:25:29,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:29,882 INFO L93 Difference]: Finished difference Result 110 states and 148 transitions. [2024-10-31 17:25:29,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 17:25:29,884 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2024-10-31 17:25:29,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:29,885 INFO L225 Difference]: With dead ends: 110 [2024-10-31 17:25:29,885 INFO L226 Difference]: Without dead ends: 108 [2024-10-31 17:25:29,886 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-10-31 17:25:29,886 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 17 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:29,886 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 301 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 17:25:29,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-10-31 17:25:29,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2024-10-31 17:25:29,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 79 states have internal predecessors, (89), 15 states have call successors, (15), 7 states have call predecessors, (15), 11 states have return successors, (29), 14 states have call predecessors, (29), 14 states have call successors, (29) [2024-10-31 17:25:29,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 133 transitions. [2024-10-31 17:25:29,894 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 133 transitions. Word has length 49 [2024-10-31 17:25:29,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:29,894 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 133 transitions. [2024-10-31 17:25:29,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 17:25:29,895 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 133 transitions. [2024-10-31 17:25:29,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-31 17:25:29,896 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:29,896 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:29,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-31 17:25:30,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:30,097 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:30,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:30,097 INFO L85 PathProgramCache]: Analyzing trace with hash -325172767, now seen corresponding path program 1 times [2024-10-31 17:25:30,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:30,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381794262] [2024-10-31 17:25:30,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:30,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:30,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:30,098 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) [2024-10-31 17:25:30,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-31 17:25:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:30,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 17:25:30,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 17:25:30,219 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 17:25:30,369 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:30,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381794262] [2024-10-31 17:25:30,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [381794262] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:25:30,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:25:30,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-10-31 17:25:30,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871311552] [2024-10-31 17:25:30,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:25:30,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-31 17:25:30,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:30,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-31 17:25:30,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-10-31 17:25:30,370 INFO L87 Difference]: Start difference. First operand 101 states and 133 transitions. Second operand has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-31 17:25:30,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:30,580 INFO L93 Difference]: Finished difference Result 133 states and 180 transitions. [2024-10-31 17:25:30,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 17:25:30,581 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 50 [2024-10-31 17:25:30,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:30,582 INFO L225 Difference]: With dead ends: 133 [2024-10-31 17:25:30,582 INFO L226 Difference]: Without dead ends: 106 [2024-10-31 17:25:30,582 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-10-31 17:25:30,583 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 30 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:30,583 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 601 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 17:25:30,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-10-31 17:25:30,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2024-10-31 17:25:30,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.234375) internal successors, (79), 70 states have internal predecessors, (79), 13 states have call successors, (13), 5 states have call predecessors, (13), 10 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2024-10-31 17:25:30,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2024-10-31 17:25:30,590 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 50 [2024-10-31 17:25:30,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:30,590 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2024-10-31 17:25:30,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-31 17:25:30,590 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2024-10-31 17:25:30,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-31 17:25:30,591 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:30,591 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:30,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-31 17:25:30,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:30,794 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:30,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:30,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1846975685, now seen corresponding path program 1 times [2024-10-31 17:25:30,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:30,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016003709] [2024-10-31 17:25:30,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:30,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:30,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:30,797 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) [2024-10-31 17:25:30,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-31 17:25:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:30,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 17:25:30,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:40,379 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 17:25:40,379 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-31 17:25:43,687 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:43,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016003709] [2024-10-31 17:25:43,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2016003709] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 17:25:43,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 17:25:43,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 17 [2024-10-31 17:25:43,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026679768] [2024-10-31 17:25:43,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:43,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 17:25:43,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:43,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 17:25:43,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=210, Unknown=3, NotChecked=0, Total=272 [2024-10-31 17:25:43,688 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 17:25:43,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:43,904 INFO L93 Difference]: Finished difference Result 98 states and 133 transitions. [2024-10-31 17:25:43,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 17:25:43,905 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-10-31 17:25:43,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:43,905 INFO L225 Difference]: With dead ends: 98 [2024-10-31 17:25:43,906 INFO L226 Difference]: Without dead ends: 94 [2024-10-31 17:25:43,906 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=72, Invalid=267, Unknown=3, NotChecked=0, Total=342 [2024-10-31 17:25:43,907 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 19 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:43,907 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 360 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 17:25:43,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-10-31 17:25:43,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2024-10-31 17:25:43,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 67 states have internal predecessors, (77), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2024-10-31 17:25:43,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2024-10-31 17:25:43,915 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 50 [2024-10-31 17:25:43,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:43,915 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2024-10-31 17:25:43,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 17:25:43,915 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2024-10-31 17:25:43,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-31 17:25:43,916 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:43,916 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:43,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-31 17:25:44,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:44,117 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:44,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:44,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1592416888, now seen corresponding path program 1 times [2024-10-31 17:25:44,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:44,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045305580] [2024-10-31 17:25:44,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:44,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:44,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:44,118 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) [2024-10-31 17:25:44,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-31 17:25:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:44,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 17:25:44,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 17:25:44,209 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 17:25:44,293 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:44,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045305580] [2024-10-31 17:25:44,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2045305580] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:25:44,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:25:44,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-10-31 17:25:44,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681523679] [2024-10-31 17:25:44,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:25:44,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 17:25:44,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:44,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 17:25:44,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-10-31 17:25:44,296 INFO L87 Difference]: Start difference. First operand 85 states and 117 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 17:25:44,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:44,453 INFO L93 Difference]: Finished difference Result 111 states and 163 transitions. [2024-10-31 17:25:44,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 17:25:44,454 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2024-10-31 17:25:44,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:44,455 INFO L225 Difference]: With dead ends: 111 [2024-10-31 17:25:44,455 INFO L226 Difference]: Without dead ends: 98 [2024-10-31 17:25:44,455 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-10-31 17:25:44,456 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 40 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:44,456 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 483 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 17:25:44,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-10-31 17:25:44,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2024-10-31 17:25:44,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 70 states have internal predecessors, (79), 12 states have call successors, (12), 5 states have call predecessors, (12), 10 states have return successors, (31), 12 states have call predecessors, (31), 11 states have call successors, (31) [2024-10-31 17:25:44,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2024-10-31 17:25:44,462 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 54 [2024-10-31 17:25:44,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:44,462 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2024-10-31 17:25:44,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 17:25:44,462 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2024-10-31 17:25:44,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-31 17:25:44,463 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:44,463 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:44,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-31 17:25:44,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:44,667 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:44,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:44,667 INFO L85 PathProgramCache]: Analyzing trace with hash -177633806, now seen corresponding path program 1 times [2024-10-31 17:25:44,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:44,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652522212] [2024-10-31 17:25:44,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:44,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:44,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:44,669 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) [2024-10-31 17:25:44,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-31 17:25:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:44,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 17:25:44,715 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 17:25:44,768 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:44,869 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 17:25:44,869 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:44,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652522212] [2024-10-31 17:25:44,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1652522212] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:25:44,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:25:44,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-10-31 17:25:44,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333999502] [2024-10-31 17:25:44,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:25:44,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 17:25:44,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:44,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 17:25:44,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-10-31 17:25:44,871 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 17:25:44,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:44,983 INFO L93 Difference]: Finished difference Result 111 states and 161 transitions. [2024-10-31 17:25:44,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 17:25:44,983 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2024-10-31 17:25:44,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:44,984 INFO L225 Difference]: With dead ends: 111 [2024-10-31 17:25:44,984 INFO L226 Difference]: Without dead ends: 98 [2024-10-31 17:25:44,985 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-10-31 17:25:44,985 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 27 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:44,985 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 535 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 17:25:44,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-10-31 17:25:44,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2024-10-31 17:25:44,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 70 states have internal predecessors, (79), 12 states have call successors, (12), 5 states have call predecessors, (12), 10 states have return successors, (30), 12 states have call predecessors, (30), 11 states have call successors, (30) [2024-10-31 17:25:44,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2024-10-31 17:25:44,991 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 63 [2024-10-31 17:25:44,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:44,992 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2024-10-31 17:25:44,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 17:25:44,992 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2024-10-31 17:25:44,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-31 17:25:44,992 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:44,993 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:45,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-31 17:25:45,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:45,197 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:45,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:45,197 INFO L85 PathProgramCache]: Analyzing trace with hash -378794195, now seen corresponding path program 1 times [2024-10-31 17:25:45,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:45,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973619656] [2024-10-31 17:25:45,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:45,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:45,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:45,198 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) [2024-10-31 17:25:45,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-31 17:25:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:45,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 17:25:45,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 17:25:45,341 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 17:25:45,555 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:45,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973619656] [2024-10-31 17:25:45,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [973619656] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:25:45,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:25:45,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2024-10-31 17:25:45,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089252023] [2024-10-31 17:25:45,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:25:45,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-31 17:25:45,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:45,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-31 17:25:45,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2024-10-31 17:25:45,557 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-10-31 17:25:46,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:46,194 INFO L93 Difference]: Finished difference Result 119 states and 164 transitions. [2024-10-31 17:25:46,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-31 17:25:46,194 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 63 [2024-10-31 17:25:46,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:46,195 INFO L225 Difference]: With dead ends: 119 [2024-10-31 17:25:46,195 INFO L226 Difference]: Without dead ends: 110 [2024-10-31 17:25:46,196 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2024-10-31 17:25:46,196 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 116 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:46,196 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 1112 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 17:25:46,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-10-31 17:25:46,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 85. [2024-10-31 17:25:46,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 67 states have internal predecessors, (77), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (27), 12 states have call predecessors, (27), 11 states have call successors, (27) [2024-10-31 17:25:46,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 116 transitions. [2024-10-31 17:25:46,203 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 116 transitions. Word has length 63 [2024-10-31 17:25:46,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:46,203 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 116 transitions. [2024-10-31 17:25:46,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-10-31 17:25:46,204 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 116 transitions. [2024-10-31 17:25:46,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-10-31 17:25:46,204 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:46,204 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:46,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-31 17:25:46,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:46,405 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:46,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:46,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1544151288, now seen corresponding path program 1 times [2024-10-31 17:25:46,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:46,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797037973] [2024-10-31 17:25:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:46,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:46,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:46,408 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) [2024-10-31 17:25:46,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-31 17:25:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:46,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 17:25:46,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:46,569 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 17:25:46,569 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 17:25:46,754 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:46,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797037973] [2024-10-31 17:25:46,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [797037973] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:25:46,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:25:46,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2024-10-31 17:25:46,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618171158] [2024-10-31 17:25:46,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:25:46,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-31 17:25:46,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:46,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-31 17:25:46,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-10-31 17:25:46,756 INFO L87 Difference]: Start difference. First operand 85 states and 116 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-10-31 17:25:47,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:47,018 INFO L93 Difference]: Finished difference Result 120 states and 173 transitions. [2024-10-31 17:25:47,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 17:25:47,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 65 [2024-10-31 17:25:47,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:47,020 INFO L225 Difference]: With dead ends: 120 [2024-10-31 17:25:47,020 INFO L226 Difference]: Without dead ends: 106 [2024-10-31 17:25:47,020 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2024-10-31 17:25:47,021 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 108 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:47,021 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 679 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 17:25:47,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-10-31 17:25:47,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2024-10-31 17:25:47,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 67 states have internal predecessors, (76), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (27), 12 states have call predecessors, (27), 11 states have call successors, (27) [2024-10-31 17:25:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 115 transitions. [2024-10-31 17:25:47,028 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 115 transitions. Word has length 65 [2024-10-31 17:25:47,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:47,028 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 115 transitions. [2024-10-31 17:25:47,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-10-31 17:25:47,028 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 115 transitions. [2024-10-31 17:25:47,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-10-31 17:25:47,029 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:47,029 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:47,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-31 17:25:47,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:47,230 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:47,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:47,230 INFO L85 PathProgramCache]: Analyzing trace with hash -2130957302, now seen corresponding path program 1 times [2024-10-31 17:25:47,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:47,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433006242] [2024-10-31 17:25:47,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:47,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:47,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:47,232 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) [2024-10-31 17:25:47,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-31 17:25:47,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:47,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 17:25:47,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:47,335 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 17:25:47,335 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 17:25:47,425 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:47,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433006242] [2024-10-31 17:25:47,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [433006242] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:25:47,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:25:47,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-10-31 17:25:47,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405396068] [2024-10-31 17:25:47,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:25:47,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 17:25:47,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:47,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 17:25:47,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-10-31 17:25:47,426 INFO L87 Difference]: Start difference. First operand 85 states and 115 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 17:25:47,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:47,522 INFO L93 Difference]: Finished difference Result 106 states and 147 transitions. [2024-10-31 17:25:47,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 17:25:47,523 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2024-10-31 17:25:47,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:47,523 INFO L225 Difference]: With dead ends: 106 [2024-10-31 17:25:47,523 INFO L226 Difference]: Without dead ends: 92 [2024-10-31 17:25:47,524 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-10-31 17:25:47,524 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 30 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:47,524 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 395 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 17:25:47,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-10-31 17:25:47,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 82. [2024-10-31 17:25:47,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 64 states have internal predecessors, (73), 12 states have call successors, (12), 5 states have call predecessors, (12), 8 states have return successors, (25), 12 states have call predecessors, (25), 11 states have call successors, (25) [2024-10-31 17:25:47,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 110 transitions. [2024-10-31 17:25:47,531 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 110 transitions. Word has length 65 [2024-10-31 17:25:47,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:47,531 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 110 transitions. [2024-10-31 17:25:47,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 17:25:47,531 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 110 transitions. [2024-10-31 17:25:47,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-10-31 17:25:47,532 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:47,532 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:47,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-31 17:25:47,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:47,733 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:47,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:47,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1951422266, now seen corresponding path program 1 times [2024-10-31 17:25:47,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:47,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090062022] [2024-10-31 17:25:47,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:47,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:47,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:47,734 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) [2024-10-31 17:25:47,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-31 17:25:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:47,793 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-31 17:25:47,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-31 17:25:48,102 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-31 17:25:49,453 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:49,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090062022] [2024-10-31 17:25:49,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1090062022] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:25:49,453 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:25:49,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 17] imperfect sequences [] total 24 [2024-10-31 17:25:49,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771663209] [2024-10-31 17:25:49,453 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:25:49,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-31 17:25:49,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:49,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-31 17:25:49,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2024-10-31 17:25:49,454 INFO L87 Difference]: Start difference. First operand 82 states and 110 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2024-10-31 17:25:49,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:49,989 INFO L93 Difference]: Finished difference Result 119 states and 172 transitions. [2024-10-31 17:25:49,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 17:25:49,990 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 72 [2024-10-31 17:25:49,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:49,991 INFO L225 Difference]: With dead ends: 119 [2024-10-31 17:25:49,991 INFO L226 Difference]: Without dead ends: 108 [2024-10-31 17:25:49,991 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2024-10-31 17:25:49,992 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 52 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:49,992 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 992 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 17:25:49,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-10-31 17:25:50,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2024-10-31 17:25:50,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 74 states have internal predecessors, (83), 14 states have call successors, (14), 5 states have call predecessors, (14), 10 states have return successors, (38), 14 states have call predecessors, (38), 13 states have call successors, (38) [2024-10-31 17:25:50,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 135 transitions. [2024-10-31 17:25:50,005 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 135 transitions. Word has length 72 [2024-10-31 17:25:50,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:50,005 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 135 transitions. [2024-10-31 17:25:50,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2024-10-31 17:25:50,005 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 135 transitions. [2024-10-31 17:25:50,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-10-31 17:25:50,006 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:50,006 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:50,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-31 17:25:50,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:50,206 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:50,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:50,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1279345645, now seen corresponding path program 1 times [2024-10-31 17:25:50,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:50,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857489943] [2024-10-31 17:25:50,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:50,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:50,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:50,208 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) [2024-10-31 17:25:50,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-31 17:25:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:50,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-31 17:25:50,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 17:25:50,704 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-31 17:25:51,988 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:51,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857489943] [2024-10-31 17:25:51,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1857489943] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:25:51,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:25:51,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-10-31 17:25:51,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654865836] [2024-10-31 17:25:51,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:25:51,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-31 17:25:51,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:51,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-31 17:25:51,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2024-10-31 17:25:51,989 INFO L87 Difference]: Start difference. First operand 94 states and 135 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-10-31 17:25:54,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:54,416 INFO L93 Difference]: Finished difference Result 157 states and 227 transitions. [2024-10-31 17:25:54,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-31 17:25:54,417 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 72 [2024-10-31 17:25:54,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:54,418 INFO L225 Difference]: With dead ends: 157 [2024-10-31 17:25:54,418 INFO L226 Difference]: Without dead ends: 127 [2024-10-31 17:25:54,418 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=342, Invalid=2108, Unknown=0, NotChecked=0, Total=2450 [2024-10-31 17:25:54,419 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 66 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:54,419 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 746 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-31 17:25:54,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-10-31 17:25:54,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 113. [2024-10-31 17:25:54,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 88 states have internal predecessors, (99), 18 states have call successors, (18), 6 states have call predecessors, (18), 11 states have return successors, (55), 18 states have call predecessors, (55), 17 states have call successors, (55) [2024-10-31 17:25:54,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 172 transitions. [2024-10-31 17:25:54,430 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 172 transitions. Word has length 72 [2024-10-31 17:25:54,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:54,430 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 172 transitions. [2024-10-31 17:25:54,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-10-31 17:25:54,430 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 172 transitions. [2024-10-31 17:25:54,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-10-31 17:25:54,431 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:54,431 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:54,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-10-31 17:25:54,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:54,631 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:54,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:54,632 INFO L85 PathProgramCache]: Analyzing trace with hash -784876239, now seen corresponding path program 2 times [2024-10-31 17:25:54,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:54,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664266391] [2024-10-31 17:25:54,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:54,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:54,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:54,633 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) [2024-10-31 17:25:54,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-31 17:25:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:54,684 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-31 17:25:54,685 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 17:25:55,159 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:56,386 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-31 17:25:56,386 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:56,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664266391] [2024-10-31 17:25:56,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [664266391] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:25:56,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:25:56,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-10-31 17:25:56,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729625006] [2024-10-31 17:25:56,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:25:56,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-31 17:25:56,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:56,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-31 17:25:56,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2024-10-31 17:25:56,388 INFO L87 Difference]: Start difference. First operand 113 states and 172 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-10-31 17:25:58,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:58,415 INFO L93 Difference]: Finished difference Result 179 states and 261 transitions. [2024-10-31 17:25:58,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-31 17:25:58,419 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 72 [2024-10-31 17:25:58,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:58,420 INFO L225 Difference]: With dead ends: 179 [2024-10-31 17:25:58,420 INFO L226 Difference]: Without dead ends: 162 [2024-10-31 17:25:58,421 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=268, Invalid=1538, Unknown=0, NotChecked=0, Total=1806 [2024-10-31 17:25:58,421 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 49 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:58,422 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 1102 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-31 17:25:58,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-10-31 17:25:58,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 143. [2024-10-31 17:25:58,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 106 states have (on average 1.1981132075471699) internal successors, (127), 112 states have internal predecessors, (127), 23 states have call successors, (23), 7 states have call predecessors, (23), 13 states have return successors, (68), 23 states have call predecessors, (68), 22 states have call successors, (68) [2024-10-31 17:25:58,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 218 transitions. [2024-10-31 17:25:58,465 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 218 transitions. Word has length 72 [2024-10-31 17:25:58,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:58,465 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 218 transitions. [2024-10-31 17:25:58,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-10-31 17:25:58,468 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 218 transitions. [2024-10-31 17:25:58,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-31 17:25:58,468 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:58,469 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:58,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-10-31 17:25:58,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:58,669 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:58,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:58,670 INFO L85 PathProgramCache]: Analyzing trace with hash 140535092, now seen corresponding path program 1 times [2024-10-31 17:25:58,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:58,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866019559] [2024-10-31 17:25:58,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:58,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:58,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:58,671 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) [2024-10-31 17:25:58,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-31 17:25:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:58,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 17:25:58,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:58,752 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-31 17:25:58,752 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:25:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-31 17:25:58,792 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:25:58,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866019559] [2024-10-31 17:25:58,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1866019559] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:25:58,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:25:58,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2024-10-31 17:25:58,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082530887] [2024-10-31 17:25:58,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:25:58,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 17:25:58,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:25:58,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 17:25:58,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-31 17:25:58,793 INFO L87 Difference]: Start difference. First operand 143 states and 218 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-31 17:25:58,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:25:58,826 INFO L93 Difference]: Finished difference Result 151 states and 226 transitions. [2024-10-31 17:25:58,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 17:25:58,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 74 [2024-10-31 17:25:58,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:25:58,828 INFO L225 Difference]: With dead ends: 151 [2024-10-31 17:25:58,828 INFO L226 Difference]: Without dead ends: 146 [2024-10-31 17:25:58,828 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-31 17:25:58,829 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 1 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 17:25:58,829 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 342 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 17:25:58,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-10-31 17:25:58,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2024-10-31 17:25:58,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 106 states have (on average 1.1981132075471699) internal successors, (127), 112 states have internal predecessors, (127), 23 states have call successors, (23), 7 states have call predecessors, (23), 13 states have return successors, (68), 23 states have call predecessors, (68), 22 states have call successors, (68) [2024-10-31 17:25:58,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 218 transitions. [2024-10-31 17:25:58,844 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 218 transitions. Word has length 74 [2024-10-31 17:25:58,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:25:58,845 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 218 transitions. [2024-10-31 17:25:58,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-31 17:25:58,845 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 218 transitions. [2024-10-31 17:25:58,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-31 17:25:58,846 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:25:58,846 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:25:58,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-10-31 17:25:59,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:59,046 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:25:59,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:25:59,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1250321149, now seen corresponding path program 1 times [2024-10-31 17:25:59,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:25:59,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108832378] [2024-10-31 17:25:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:25:59,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:25:59,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:25:59,048 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) [2024-10-31 17:25:59,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-31 17:25:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:25:59,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-31 17:25:59,100 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:25:59,487 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 17:25:59,487 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:26:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-31 17:26:00,781 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:26:00,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108832378] [2024-10-31 17:26:00,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [108832378] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:26:00,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:26:00,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-10-31 17:26:00,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513231119] [2024-10-31 17:26:00,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:26:00,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-31 17:26:00,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:26:00,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-31 17:26:00,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2024-10-31 17:26:00,783 INFO L87 Difference]: Start difference. First operand 143 states and 218 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-10-31 17:26:02,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:26:02,130 INFO L93 Difference]: Finished difference Result 177 states and 256 transitions. [2024-10-31 17:26:02,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-31 17:26:02,131 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 74 [2024-10-31 17:26:02,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:26:02,132 INFO L225 Difference]: With dead ends: 177 [2024-10-31 17:26:02,132 INFO L226 Difference]: Without dead ends: 163 [2024-10-31 17:26:02,132 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=231, Invalid=1029, Unknown=0, NotChecked=0, Total=1260 [2024-10-31 17:26:02,133 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 43 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-31 17:26:02,133 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 1044 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-31 17:26:02,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-10-31 17:26:02,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 151. [2024-10-31 17:26:02,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 113 states have (on average 1.1946902654867257) internal successors, (135), 118 states have internal predecessors, (135), 24 states have call successors, (24), 8 states have call predecessors, (24), 13 states have return successors, (63), 24 states have call predecessors, (63), 23 states have call successors, (63) [2024-10-31 17:26:02,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 222 transitions. [2024-10-31 17:26:02,151 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 222 transitions. Word has length 74 [2024-10-31 17:26:02,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:26:02,151 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 222 transitions. [2024-10-31 17:26:02,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-10-31 17:26:02,151 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 222 transitions. [2024-10-31 17:26:02,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-31 17:26:02,152 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:26:02,152 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:26:02,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-10-31 17:26:02,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:26:02,353 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:26:02,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:26:02,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1455113153, now seen corresponding path program 2 times [2024-10-31 17:26:02,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:26:02,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503913745] [2024-10-31 17:26:02,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:26:02,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:26:02,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:26:02,355 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) [2024-10-31 17:26:02,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-31 17:26:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:26:02,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-31 17:26:02,407 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:26:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 17:26:02,812 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:26:04,130 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-31 17:26:04,130 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:26:04,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503913745] [2024-10-31 17:26:04,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [503913745] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:26:04,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:26:04,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-10-31 17:26:04,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084301832] [2024-10-31 17:26:04,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:26:04,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-31 17:26:04,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:26:04,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-31 17:26:04,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2024-10-31 17:26:04,132 INFO L87 Difference]: Start difference. First operand 151 states and 222 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-10-31 17:26:05,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:26:05,615 INFO L93 Difference]: Finished difference Result 187 states and 263 transitions. [2024-10-31 17:26:05,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-31 17:26:05,620 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 74 [2024-10-31 17:26:05,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:26:05,621 INFO L225 Difference]: With dead ends: 187 [2024-10-31 17:26:05,621 INFO L226 Difference]: Without dead ends: 173 [2024-10-31 17:26:05,621 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2024-10-31 17:26:05,622 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 33 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-31 17:26:05,622 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1006 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-31 17:26:05,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-10-31 17:26:05,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 152. [2024-10-31 17:26:05,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 116 states have (on average 1.1982758620689655) internal successors, (139), 119 states have internal predecessors, (139), 23 states have call successors, (23), 9 states have call predecessors, (23), 12 states have return successors, (48), 23 states have call predecessors, (48), 22 states have call successors, (48) [2024-10-31 17:26:05,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 210 transitions. [2024-10-31 17:26:05,639 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 210 transitions. Word has length 74 [2024-10-31 17:26:05,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:26:05,639 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 210 transitions. [2024-10-31 17:26:05,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-10-31 17:26:05,640 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 210 transitions. [2024-10-31 17:26:05,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-10-31 17:26:05,640 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:26:05,641 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:26:05,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-31 17:26:05,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:26:05,841 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:26:05,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:26:05,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1126803066, now seen corresponding path program 1 times [2024-10-31 17:26:05,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:26:05,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315278487] [2024-10-31 17:26:05,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:26:05,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:26:05,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:26:05,844 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) [2024-10-31 17:26:05,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-31 17:26:05,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:26:05,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-31 17:26:05,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:26:06,236 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-31 17:26:06,236 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:26:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-31 17:26:07,269 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:26:07,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315278487] [2024-10-31 17:26:07,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [315278487] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:26:07,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:26:07,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2024-10-31 17:26:07,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201502393] [2024-10-31 17:26:07,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:26:07,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-31 17:26:07,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:26:07,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-31 17:26:07,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2024-10-31 17:26:07,271 INFO L87 Difference]: Start difference. First operand 152 states and 210 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-10-31 17:26:08,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:26:08,215 INFO L93 Difference]: Finished difference Result 176 states and 241 transitions. [2024-10-31 17:26:08,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-31 17:26:08,216 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 77 [2024-10-31 17:26:08,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:26:08,218 INFO L225 Difference]: With dead ends: 176 [2024-10-31 17:26:08,219 INFO L226 Difference]: Without dead ends: 134 [2024-10-31 17:26:08,219 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2024-10-31 17:26:08,219 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 53 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-31 17:26:08,220 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 800 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-31 17:26:08,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-10-31 17:26:08,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 116. [2024-10-31 17:26:08,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 87 states have (on average 1.1724137931034482) internal successors, (102), 90 states have internal predecessors, (102), 18 states have call successors, (18), 7 states have call predecessors, (18), 10 states have return successors, (41), 18 states have call predecessors, (41), 17 states have call successors, (41) [2024-10-31 17:26:08,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 161 transitions. [2024-10-31 17:26:08,243 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 161 transitions. Word has length 77 [2024-10-31 17:26:08,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:26:08,243 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 161 transitions. [2024-10-31 17:26:08,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-10-31 17:26:08,243 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 161 transitions. [2024-10-31 17:26:08,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-10-31 17:26:08,244 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:26:08,244 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:26:08,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-10-31 17:26:08,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:26:08,444 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:26:08,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:26:08,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1521970778, now seen corresponding path program 1 times [2024-10-31 17:26:08,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:26:08,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538938934] [2024-10-31 17:26:08,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:26:08,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:26:08,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:26:08,447 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) [2024-10-31 17:26:08,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-31 17:26:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:26:08,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 17:26:08,500 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:26:08,525 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-31 17:26:08,525 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:26:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-31 17:26:08,556 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:26:08,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538938934] [2024-10-31 17:26:08,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [538938934] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:26:08,556 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:26:08,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2024-10-31 17:26:08,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705843691] [2024-10-31 17:26:08,556 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:26:08,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 17:26:08,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:26:08,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 17:26:08,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-31 17:26:08,557 INFO L87 Difference]: Start difference. First operand 116 states and 161 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-31 17:26:08,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:26:08,584 INFO L93 Difference]: Finished difference Result 127 states and 172 transitions. [2024-10-31 17:26:08,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 17:26:08,585 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 76 [2024-10-31 17:26:08,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:26:08,586 INFO L225 Difference]: With dead ends: 127 [2024-10-31 17:26:08,586 INFO L226 Difference]: Without dead ends: 118 [2024-10-31 17:26:08,586 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-31 17:26:08,586 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 17:26:08,586 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 325 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 17:26:08,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-10-31 17:26:08,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2024-10-31 17:26:08,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 89 states have (on average 1.1685393258426966) internal successors, (104), 91 states have internal predecessors, (104), 18 states have call successors, (18), 7 states have call predecessors, (18), 10 states have return successors, (37), 19 states have call predecessors, (37), 17 states have call successors, (37) [2024-10-31 17:26:08,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 159 transitions. [2024-10-31 17:26:08,599 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 159 transitions. Word has length 76 [2024-10-31 17:26:08,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:26:08,599 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 159 transitions. [2024-10-31 17:26:08,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-31 17:26:08,599 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 159 transitions. [2024-10-31 17:26:08,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-10-31 17:26:08,600 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:26:08,600 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:26:08,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-10-31 17:26:08,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:26:08,801 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:26:08,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:26:08,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1449154486, now seen corresponding path program 2 times [2024-10-31 17:26:08,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:26:08,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130812334] [2024-10-31 17:26:08,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:26:08,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:26:08,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:26:08,803 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) [2024-10-31 17:26:08,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-31 17:26:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:26:08,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-31 17:26:08,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:26:09,187 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-31 17:26:09,187 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:26:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-31 17:26:10,147 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:26:10,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130812334] [2024-10-31 17:26:10,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [130812334] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:26:10,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:26:10,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2024-10-31 17:26:10,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610603822] [2024-10-31 17:26:10,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:26:10,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-31 17:26:10,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:26:10,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-31 17:26:10,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2024-10-31 17:26:10,148 INFO L87 Difference]: Start difference. First operand 118 states and 159 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-10-31 17:26:11,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:26:11,059 INFO L93 Difference]: Finished difference Result 137 states and 184 transitions. [2024-10-31 17:26:11,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-31 17:26:11,060 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 77 [2024-10-31 17:26:11,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:26:11,060 INFO L225 Difference]: With dead ends: 137 [2024-10-31 17:26:11,060 INFO L226 Difference]: Without dead ends: 108 [2024-10-31 17:26:11,061 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2024-10-31 17:26:11,061 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 26 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-31 17:26:11,061 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 845 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-31 17:26:11,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-10-31 17:26:11,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2024-10-31 17:26:11,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.173913043478261) internal successors, (81), 72 states have internal predecessors, (81), 14 states have call successors, (14), 5 states have call predecessors, (14), 9 states have return successors, (30), 15 states have call predecessors, (30), 13 states have call successors, (30) [2024-10-31 17:26:11,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2024-10-31 17:26:11,072 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 125 transitions. Word has length 77 [2024-10-31 17:26:11,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:26:11,072 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 125 transitions. [2024-10-31 17:26:11,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-10-31 17:26:11,073 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 125 transitions. [2024-10-31 17:26:11,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-10-31 17:26:11,073 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:26:11,074 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:26:11,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-10-31 17:26:11,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:26:11,274 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:26:11,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:26:11,275 INFO L85 PathProgramCache]: Analyzing trace with hash 292726521, now seen corresponding path program 1 times [2024-10-31 17:26:11,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:26:11,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162124966] [2024-10-31 17:26:11,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:26:11,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:26:11,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:26:11,276 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) [2024-10-31 17:26:11,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-10-31 17:26:11,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:26:11,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-31 17:26:11,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:26:25,982 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-31 17:26:25,983 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:26:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-31 17:26:29,191 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:26:29,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162124966] [2024-10-31 17:26:29,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [162124966] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:26:29,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:26:29,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2024-10-31 17:26:29,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860739474] [2024-10-31 17:26:29,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:26:29,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-31 17:26:29,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:26:29,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-31 17:26:29,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=563, Unknown=1, NotChecked=0, Total=650 [2024-10-31 17:26:29,193 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-10-31 17:26:54,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:26:54,302 INFO L93 Difference]: Finished difference Result 114 states and 154 transitions. [2024-10-31 17:26:54,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-31 17:26:54,307 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 81 [2024-10-31 17:26:54,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:26:54,308 INFO L225 Difference]: With dead ends: 114 [2024-10-31 17:26:54,308 INFO L226 Difference]: Without dead ends: 105 [2024-10-31 17:26:54,308 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=203, Invalid=1201, Unknown=2, NotChecked=0, Total=1406 [2024-10-31 17:26:54,308 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 61 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-10-31 17:26:54,309 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 898 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-10-31 17:26:54,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-10-31 17:26:54,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2024-10-31 17:26:54,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 77 states have internal predecessors, (85), 16 states have call successors, (16), 5 states have call predecessors, (16), 10 states have return successors, (38), 17 states have call predecessors, (38), 15 states have call successors, (38) [2024-10-31 17:26:54,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 139 transitions. [2024-10-31 17:26:54,324 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 139 transitions. Word has length 81 [2024-10-31 17:26:54,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:26:54,328 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 139 transitions. [2024-10-31 17:26:54,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-10-31 17:26:54,328 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 139 transitions. [2024-10-31 17:26:54,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-10-31 17:26:54,329 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:26:54,329 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:26:54,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-10-31 17:26:54,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:26:54,529 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:26:54,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:26:54,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1678929915, now seen corresponding path program 1 times [2024-10-31 17:26:54,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:26:54,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16784603] [2024-10-31 17:26:54,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:26:54,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:26:54,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:26:54,531 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) [2024-10-31 17:26:54,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-10-31 17:26:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:26:54,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-31 17:26:54,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:26:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-10-31 17:26:58,229 INFO L311 TraceCheckSpWp]: Computing backward predicates...