/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/byte_add-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-10-31 17:23:27,996 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 17:23:28,055 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 17:23:28,107 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 17:23:28,108 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 17:23:28,108 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 17:23:28,109 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 17:23:28,109 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 17:23:28,110 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 17:23:28,110 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 17:23:28,110 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 17:23:28,111 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 17:23:28,111 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 17:23:28,111 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 17:23:28,112 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 17:23:28,112 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 17:23:28,112 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 17:23:28,113 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 17:23:28,113 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 17:23:28,113 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 17:23:28,113 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-31 17:23:28,114 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 17:23:28,114 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-31 17:23:28,114 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 17:23:28,115 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 17:23:28,115 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 17:23:28,115 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 17:23:28,116 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 17:23:28,116 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 17:23:28,116 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 17:23:28,116 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 17:23:28,117 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 17:23:28,117 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 17:23:28,117 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 17:23:28,118 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-31 17:23:28,118 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-31 17:23:28,118 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 17:23:28,118 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 17:23:28,118 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 17:23:28,119 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 17:23:28,119 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-31 17:23:28,120 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:23:28,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 17:23:28,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 17:23:28,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 17:23:28,467 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 17:23:28,467 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 17:23:28,468 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/byte_add-1.i [2024-10-31 17:23:29,835 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 17:23:30,020 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 17:23:30,020 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/byte_add-1.i [2024-10-31 17:23:30,029 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/060d2d55c/ed855aa95a634a8b92fec3aad43af042/FLAG196d8344b [2024-10-31 17:23:30,402 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/060d2d55c/ed855aa95a634a8b92fec3aad43af042 [2024-10-31 17:23:30,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 17:23:30,405 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-10-31 17:23:30,406 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 17:23:30,406 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 17:23:30,411 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 17:23:30,412 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 05:23:30" (1/1) ... [2024-10-31 17:23:30,413 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f894c9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:23:30, skipping insertion in model container [2024-10-31 17:23:30,413 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 05:23:30" (1/1) ... [2024-10-31 17:23:30,434 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 17:23:30,592 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/byte_add-1.i[1166,1179] [2024-10-31 17:23:30,647 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 17:23:30,659 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 17:23:30,671 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/byte_add-1.i[1166,1179] [2024-10-31 17:23:30,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 17:23:30,710 INFO L204 MainTranslator]: Completed translation [2024-10-31 17:23:30,711 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:23:30 WrapperNode [2024-10-31 17:23:30,712 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 17:23:30,713 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 17:23:30,713 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 17:23:30,713 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 17:23:30,719 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:23:30" (1/1) ... [2024-10-31 17:23:30,727 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:23:30" (1/1) ... [2024-10-31 17:23:30,752 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 125 [2024-10-31 17:23:30,756 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 17:23:30,757 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 17:23:30,757 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 17:23:30,757 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 17:23:30,767 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:23:30" (1/1) ... [2024-10-31 17:23:30,767 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:23:30" (1/1) ... [2024-10-31 17:23:30,772 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:23:30" (1/1) ... [2024-10-31 17:23:30,793 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 17:23:30,794 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:23:30" (1/1) ... [2024-10-31 17:23:30,794 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:23:30" (1/1) ... [2024-10-31 17:23:30,805 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:23:30" (1/1) ... [2024-10-31 17:23:30,808 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:23:30" (1/1) ... [2024-10-31 17:23:30,813 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:23:30" (1/1) ... [2024-10-31 17:23:30,814 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:23:30" (1/1) ... [2024-10-31 17:23:30,820 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 17:23:30,821 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 17:23:30,821 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 17:23:30,821 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 17:23:30,822 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:23:30" (1/1) ... [2024-10-31 17:23:30,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 17:23:30,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:23:30,854 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 17:23:30,861 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 17:23:30,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 17:23:30,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-31 17:23:30,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 17:23:30,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 17:23:30,971 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 17:23:30,973 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 17:23:31,328 INFO L? ?]: Removed 23 outVars from TransFormulas that were not future-live. [2024-10-31 17:23:31,328 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 17:23:31,344 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 17:23:31,345 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 17:23:31,346 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 05:23:31 BoogieIcfgContainer [2024-10-31 17:23:31,346 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 17:23:31,348 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 17:23:31,348 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 17:23:31,352 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 17:23:31,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 05:23:30" (1/3) ... [2024-10-31 17:23:31,353 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a4532ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 05:23:31, skipping insertion in model container [2024-10-31 17:23:31,353 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:23:30" (2/3) ... [2024-10-31 17:23:31,354 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a4532ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 05:23:31, skipping insertion in model container [2024-10-31 17:23:31,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 05:23:31" (3/3) ... [2024-10-31 17:23:31,355 INFO L112 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2024-10-31 17:23:31,372 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 17:23:31,372 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 17:23:31,470 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 17:23:31,476 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;@4eef7e4b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 17:23:31,476 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 17:23:31,481 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:31,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-31 17:23:31,488 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:23:31,489 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:23:31,490 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:23:31,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:23:31,495 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2024-10-31 17:23:31,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:23:31,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811839087] [2024-10-31 17:23:31,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:23:31,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:23:31,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:23:31,508 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 17:23:31,529 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 17:23:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:23:31,611 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-10-31 17:23:31,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:23:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 17:23:31,634 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:23:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 17:23:31,639 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:23:31,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811839087] [2024-10-31 17:23:31,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [811839087] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:23:31,640 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:23:31,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2024-10-31 17:23:31,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114506999] [2024-10-31 17:23:31,642 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:23:31,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 17:23:31,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:23:31,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 17:23:31,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 17:23:31,672 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:31,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:23:31,688 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2024-10-31 17:23:31,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 17:23:31,692 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-31 17:23:31,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:23:31,700 INFO L225 Difference]: With dead ends: 57 [2024-10-31 17:23:31,701 INFO L226 Difference]: Without dead ends: 38 [2024-10-31 17:23:31,703 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 17:23:31,706 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 17:23:31,707 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 17:23:31,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-31 17:23:31,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-10-31 17:23:31,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:31,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2024-10-31 17:23:31,734 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2024-10-31 17:23:31,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:23:31,735 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2024-10-31 17:23:31,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:31,735 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2024-10-31 17:23:31,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-31 17:23:31,736 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:23:31,736 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:23:31,753 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 17:23:31,940 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 17:23:31,941 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:23:31,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:23:31,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2024-10-31 17:23:31,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:23:31,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026245271] [2024-10-31 17:23:31,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:23:31,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:23:31,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:23:31,945 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 17:23:31,946 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 17:23:31,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:23:32,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 17:23:32,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:23:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 17:23:32,022 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:23:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 17:23:32,034 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:23:32,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026245271] [2024-10-31 17:23:32,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1026245271] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:23:32,034 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:23:32,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 17:23:32,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666205455] [2024-10-31 17:23:32,035 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:23:32,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 17:23:32,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:23:32,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 17:23:32,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 17:23:32,037 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:32,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:23:32,266 INFO L93 Difference]: Finished difference Result 107 states and 191 transitions. [2024-10-31 17:23:32,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 17:23:32,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-31 17:23:32,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:23:32,268 INFO L225 Difference]: With dead ends: 107 [2024-10-31 17:23:32,268 INFO L226 Difference]: Without dead ends: 79 [2024-10-31 17:23:32,269 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 17:23:32,270 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 60 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 17:23:32,272 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 61 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 17:23:32,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-10-31 17:23:32,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2024-10-31 17:23:32,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.5161290322580645) internal successors, (94), 62 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:32,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 94 transitions. [2024-10-31 17:23:32,286 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 94 transitions. Word has length 12 [2024-10-31 17:23:32,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:23:32,286 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 94 transitions. [2024-10-31 17:23:32,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:32,287 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 94 transitions. [2024-10-31 17:23:32,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-31 17:23:32,289 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:23:32,289 INFO L215 NwaCegarLoop]: trace histogram [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 17:23:32,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 17:23:32,490 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 17:23:32,491 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:23:32,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:23:32,491 INFO L85 PathProgramCache]: Analyzing trace with hash -235076041, now seen corresponding path program 1 times [2024-10-31 17:23:32,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:23:32,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132607361] [2024-10-31 17:23:32,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:23:32,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:23:32,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:23:32,496 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 17:23:32,497 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 17:23:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:23:32,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 17:23:32,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:23:32,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 17:23:32,573 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:23:32,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 17:23:32,588 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:23:32,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132607361] [2024-10-31 17:23:32,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [132607361] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:23:32,589 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:23:32,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 17:23:32,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988860908] [2024-10-31 17:23:32,589 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:23:32,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 17:23:32,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:23:32,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 17:23:32,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 17:23:32,590 INFO L87 Difference]: Start difference. First operand 63 states and 94 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:32,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:23:32,772 INFO L93 Difference]: Finished difference Result 141 states and 221 transitions. [2024-10-31 17:23:32,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 17:23:32,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-10-31 17:23:32,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:23:32,774 INFO L225 Difference]: With dead ends: 141 [2024-10-31 17:23:32,774 INFO L226 Difference]: Without dead ends: 93 [2024-10-31 17:23:32,774 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 17:23:32,775 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 41 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 17:23:32,776 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 79 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 17:23:32,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-10-31 17:23:32,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2024-10-31 17:23:32,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.4883720930232558) internal successors, (128), 86 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:32,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 128 transitions. [2024-10-31 17:23:32,790 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 128 transitions. Word has length 24 [2024-10-31 17:23:32,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:23:32,791 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 128 transitions. [2024-10-31 17:23:32,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:32,791 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 128 transitions. [2024-10-31 17:23:32,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-31 17:23:32,793 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:23:32,793 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:23:32,810 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 17:23:32,997 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 17:23:32,998 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:23:32,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:23:32,998 INFO L85 PathProgramCache]: Analyzing trace with hash 730584695, now seen corresponding path program 1 times [2024-10-31 17:23:32,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:23:32,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700674787] [2024-10-31 17:23:32,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:23:32,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:23:32,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:23:33,001 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 17:23:33,002 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 17:23:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:23:33,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 17:23:33,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:23:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 17:23:33,094 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:23:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 17:23:33,169 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:23:33,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700674787] [2024-10-31 17:23:33,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1700674787] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:23:33,170 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:23:33,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2024-10-31 17:23:33,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907589963] [2024-10-31 17:23:33,170 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:23:33,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 17:23:33,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:23:33,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 17:23:33,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 17:23:33,175 INFO L87 Difference]: Start difference. First operand 87 states and 128 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:33,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:23:33,346 INFO L93 Difference]: Finished difference Result 244 states and 368 transitions. [2024-10-31 17:23:33,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 17:23:33,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-10-31 17:23:33,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:23:33,348 INFO L225 Difference]: With dead ends: 244 [2024-10-31 17:23:33,348 INFO L226 Difference]: Without dead ends: 165 [2024-10-31 17:23:33,348 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-31 17:23:33,353 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 98 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 17:23:33,353 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 150 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 17:23:33,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-10-31 17:23:33,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 158. [2024-10-31 17:23:33,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.4777070063694266) internal successors, (232), 157 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:33,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 232 transitions. [2024-10-31 17:23:33,372 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 232 transitions. Word has length 24 [2024-10-31 17:23:33,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:23:33,373 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 232 transitions. [2024-10-31 17:23:33,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:33,373 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 232 transitions. [2024-10-31 17:23:33,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-31 17:23:33,376 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:23:33,376 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:23:33,393 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 17:23:33,577 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 17:23:33,577 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:23:33,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:23:33,578 INFO L85 PathProgramCache]: Analyzing trace with hash -331639239, now seen corresponding path program 1 times [2024-10-31 17:23:33,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:23:33,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772523575] [2024-10-31 17:23:33,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:23:33,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:23:33,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:23:33,581 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 17:23:33,596 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 17:23:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:23:33,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 17:23:33,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:23:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 17:23:33,675 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:23:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 17:23:33,725 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:23:33,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772523575] [2024-10-31 17:23:33,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1772523575] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:23:33,726 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:23:33,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2024-10-31 17:23:33,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306617808] [2024-10-31 17:23:33,726 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:23:33,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 17:23:33,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:23:33,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 17:23:33,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 17:23:33,728 INFO L87 Difference]: Start difference. First operand 158 states and 232 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:33,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:23:33,848 INFO L93 Difference]: Finished difference Result 457 states and 677 transitions. [2024-10-31 17:23:33,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 17:23:33,849 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-10-31 17:23:33,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:23:33,851 INFO L225 Difference]: With dead ends: 457 [2024-10-31 17:23:33,851 INFO L226 Difference]: Without dead ends: 309 [2024-10-31 17:23:33,852 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-31 17:23:33,852 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 76 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 17:23:33,853 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 148 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 17:23:33,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2024-10-31 17:23:33,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 285. [2024-10-31 17:23:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.4612676056338028) internal successors, (415), 284 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:33,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 415 transitions. [2024-10-31 17:23:33,876 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 415 transitions. Word has length 25 [2024-10-31 17:23:33,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:23:33,877 INFO L471 AbstractCegarLoop]: Abstraction has 285 states and 415 transitions. [2024-10-31 17:23:33,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:33,877 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 415 transitions. [2024-10-31 17:23:33,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-31 17:23:33,879 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:23:33,879 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:23:33,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 17:23:34,083 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 17:23:34,084 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:23:34,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:23:34,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1606169286, now seen corresponding path program 1 times [2024-10-31 17:23:34,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:23:34,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086394613] [2024-10-31 17:23:34,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:23:34,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:23:34,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:23:34,086 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 17:23:34,088 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 17:23:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:23:34,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 17:23:34,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:23:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-31 17:23:34,175 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:23:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 17:23:34,230 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:23:34,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086394613] [2024-10-31 17:23:34,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1086394613] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:23:34,230 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:23:34,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 9 [2024-10-31 17:23:34,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618705047] [2024-10-31 17:23:34,231 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:23:34,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 17:23:34,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:23:34,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 17:23:34,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-10-31 17:23:34,235 INFO L87 Difference]: Start difference. First operand 285 states and 415 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:34,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:23:34,679 INFO L93 Difference]: Finished difference Result 799 states and 1194 transitions. [2024-10-31 17:23:34,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-31 17:23:34,680 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-10-31 17:23:34,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:23:34,684 INFO L225 Difference]: With dead ends: 799 [2024-10-31 17:23:34,684 INFO L226 Difference]: Without dead ends: 640 [2024-10-31 17:23:34,687 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2024-10-31 17:23:34,688 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 417 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 17:23:34,688 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 221 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 17:23:34,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2024-10-31 17:23:34,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 569. [2024-10-31 17:23:34,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 1.466549295774648) internal successors, (833), 568 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:34,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 833 transitions. [2024-10-31 17:23:34,736 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 833 transitions. Word has length 26 [2024-10-31 17:23:34,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:23:34,736 INFO L471 AbstractCegarLoop]: Abstraction has 569 states and 833 transitions. [2024-10-31 17:23:34,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:34,737 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 833 transitions. [2024-10-31 17:23:34,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-31 17:23:34,739 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:23:34,739 INFO L215 NwaCegarLoop]: trace histogram [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 17:23:34,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-31 17:23:34,939 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 17:23:34,940 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:23:34,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:23:34,940 INFO L85 PathProgramCache]: Analyzing trace with hash -79209670, now seen corresponding path program 1 times [2024-10-31 17:23:34,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:23:34,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005675279] [2024-10-31 17:23:34,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:23:34,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:23:34,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:23:34,942 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 17:23:34,943 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 17:23:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:23:35,000 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 17:23:35,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:23:35,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 17:23:35,023 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:23:35,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 17:23:35,046 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:23:35,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005675279] [2024-10-31 17:23:35,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2005675279] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:23:35,046 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:23:35,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 17:23:35,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932048701] [2024-10-31 17:23:35,047 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:23:35,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 17:23:35,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:23:35,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 17:23:35,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 17:23:35,048 INFO L87 Difference]: Start difference. First operand 569 states and 833 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:35,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:23:35,081 INFO L93 Difference]: Finished difference Result 777 states and 1118 transitions. [2024-10-31 17:23:35,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 17:23:35,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-10-31 17:23:35,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:23:35,085 INFO L225 Difference]: With dead ends: 777 [2024-10-31 17:23:35,085 INFO L226 Difference]: Without dead ends: 758 [2024-10-31 17:23:35,085 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 17:23:35,086 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 4 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 17:23:35,087 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 180 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 17:23:35,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2024-10-31 17:23:35,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 684. [2024-10-31 17:23:35,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 1.4773060029282576) internal successors, (1009), 683 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:35,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1009 transitions. [2024-10-31 17:23:35,113 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1009 transitions. Word has length 34 [2024-10-31 17:23:35,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:23:35,114 INFO L471 AbstractCegarLoop]: Abstraction has 684 states and 1009 transitions. [2024-10-31 17:23:35,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:35,114 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1009 transitions. [2024-10-31 17:23:35,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-31 17:23:35,116 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:23:35,116 INFO L215 NwaCegarLoop]: trace histogram [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 17:23:35,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-31 17:23:35,316 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 17:23:35,317 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:23:35,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:23:35,317 INFO L85 PathProgramCache]: Analyzing trace with hash -2073354376, now seen corresponding path program 1 times [2024-10-31 17:23:35,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:23:35,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103726765] [2024-10-31 17:23:35,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:23:35,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:23:35,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:23:35,320 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 17:23:35,329 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 17:23:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:23:35,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 17:23:35,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:23:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 17:23:35,421 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:23:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 17:23:35,647 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:23:35,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103726765] [2024-10-31 17:23:35,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [103726765] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 17:23:35,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 17:23:35,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2024-10-31 17:23:35,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087949156] [2024-10-31 17:23:35,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 17:23:35,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 17:23:35,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:23:35,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 17:23:35,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-10-31 17:23:35,649 INFO L87 Difference]: Start difference. First operand 684 states and 1009 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:35,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:23:35,759 INFO L93 Difference]: Finished difference Result 1343 states and 1989 transitions. [2024-10-31 17:23:35,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 17:23:35,759 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-10-31 17:23:35,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:23:35,763 INFO L225 Difference]: With dead ends: 1343 [2024-10-31 17:23:35,763 INFO L226 Difference]: Without dead ends: 1021 [2024-10-31 17:23:35,764 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-10-31 17:23:35,764 INFO L432 NwaCegarLoop]: 108 mSDtfsCounter, 109 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 17:23:35,765 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 262 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 17:23:35,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2024-10-31 17:23:35,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 700. [2024-10-31 17:23:35,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 1.4706723891273248) internal successors, (1028), 699 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:35,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1028 transitions. [2024-10-31 17:23:35,788 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1028 transitions. Word has length 34 [2024-10-31 17:23:35,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:23:35,788 INFO L471 AbstractCegarLoop]: Abstraction has 700 states and 1028 transitions. [2024-10-31 17:23:35,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:35,789 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1028 transitions. [2024-10-31 17:23:35,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-31 17:23:35,790 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:23:35,790 INFO L215 NwaCegarLoop]: trace histogram [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 17:23:35,806 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 17:23:35,990 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 17:23:35,991 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:23:35,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:23:35,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1247991121, now seen corresponding path program 1 times [2024-10-31 17:23:35,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:23:35,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815166491] [2024-10-31 17:23:35,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:23:35,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:23:35,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:23:35,993 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 17:23:35,994 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 17:23:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:23:36,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 17:23:36,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:23:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 17:23:36,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:23:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 17:23:36,346 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:23:36,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815166491] [2024-10-31 17:23:36,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1815166491] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 17:23:36,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 17:23:36,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2024-10-31 17:23:36,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179563056] [2024-10-31 17:23:36,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 17:23:36,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 17:23:36,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:23:36,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 17:23:36,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-10-31 17:23:36,347 INFO L87 Difference]: Start difference. First operand 700 states and 1028 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:36,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:23:36,608 INFO L93 Difference]: Finished difference Result 1593 states and 2355 transitions. [2024-10-31 17:23:36,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 17:23:36,609 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-10-31 17:23:36,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:23:36,614 INFO L225 Difference]: With dead ends: 1593 [2024-10-31 17:23:36,614 INFO L226 Difference]: Without dead ends: 1271 [2024-10-31 17:23:36,615 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-10-31 17:23:36,616 INFO L432 NwaCegarLoop]: 150 mSDtfsCounter, 164 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 17:23:36,616 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 652 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 17:23:36,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2024-10-31 17:23:36,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 892. [2024-10-31 17:23:36,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 1.4657687991021324) internal successors, (1306), 891 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:36,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1306 transitions. [2024-10-31 17:23:36,658 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1306 transitions. Word has length 35 [2024-10-31 17:23:36,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:23:36,659 INFO L471 AbstractCegarLoop]: Abstraction has 892 states and 1306 transitions. [2024-10-31 17:23:36,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:36,660 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1306 transitions. [2024-10-31 17:23:36,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-31 17:23:36,662 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:23:36,662 INFO L215 NwaCegarLoop]: trace histogram [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 17:23:36,680 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 17:23:36,867 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 17:23:36,868 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:23:36,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:23:36,869 INFO L85 PathProgramCache]: Analyzing trace with hash -546391247, now seen corresponding path program 1 times [2024-10-31 17:23:36,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:23:36,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625614033] [2024-10-31 17:23:36,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:23:36,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:23:36,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:23:36,871 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 17:23:36,873 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 17:23:36,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:23:36,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 17:23:36,924 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:23:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 17:23:36,992 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:23:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 17:23:37,109 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:23:37,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625614033] [2024-10-31 17:23:37,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [625614033] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:23:37,109 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:23:37,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2024-10-31 17:23:37,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013030321] [2024-10-31 17:23:37,109 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:23:37,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-31 17:23:37,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:23:37,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-31 17:23:37,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-10-31 17:23:37,111 INFO L87 Difference]: Start difference. First operand 892 states and 1306 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:38,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:23:38,308 INFO L93 Difference]: Finished difference Result 3246 states and 4915 transitions. [2024-10-31 17:23:38,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-31 17:23:38,309 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-10-31 17:23:38,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:23:38,317 INFO L225 Difference]: With dead ends: 3246 [2024-10-31 17:23:38,318 INFO L226 Difference]: Without dead ends: 2413 [2024-10-31 17:23:38,319 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=599, Unknown=0, NotChecked=0, Total=812 [2024-10-31 17:23:38,320 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 855 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-31 17:23:38,321 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 225 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-31 17:23:38,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2024-10-31 17:23:38,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 2068. [2024-10-31 17:23:38,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2067 states have (on average 1.3681664247701983) internal successors, (2828), 2067 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:38,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 2828 transitions. [2024-10-31 17:23:38,407 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 2828 transitions. Word has length 35 [2024-10-31 17:23:38,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:23:38,409 INFO L471 AbstractCegarLoop]: Abstraction has 2068 states and 2828 transitions. [2024-10-31 17:23:38,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:38,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 2828 transitions. [2024-10-31 17:23:38,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-31 17:23:38,412 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:23:38,412 INFO L215 NwaCegarLoop]: trace histogram [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 17:23:38,429 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 17:23:38,616 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 17:23:38,617 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:23:38,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:23:38,617 INFO L85 PathProgramCache]: Analyzing trace with hash -831993613, now seen corresponding path program 1 times [2024-10-31 17:23:38,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:23:38,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574244907] [2024-10-31 17:23:38,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:23:38,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:23:38,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:23:38,619 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 17:23:38,621 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 17:23:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:23:38,673 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 17:23:38,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:23:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 17:23:38,682 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:23:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 17:23:38,690 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:23:38,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574244907] [2024-10-31 17:23:38,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [574244907] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:23:38,691 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:23:38,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 17:23:38,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539749104] [2024-10-31 17:23:38,691 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:23:38,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 17:23:38,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:23:38,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 17:23:38,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 17:23:38,692 INFO L87 Difference]: Start difference. First operand 2068 states and 2828 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:38,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:23:38,868 INFO L93 Difference]: Finished difference Result 4332 states and 5904 transitions. [2024-10-31 17:23:38,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 17:23:38,868 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-10-31 17:23:38,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:23:38,876 INFO L225 Difference]: With dead ends: 4332 [2024-10-31 17:23:38,876 INFO L226 Difference]: Without dead ends: 2327 [2024-10-31 17:23:38,879 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 17:23:38,880 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 35 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 17:23:38,880 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 85 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 17:23:38,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2327 states. [2024-10-31 17:23:38,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2327 to 2016. [2024-10-31 17:23:38,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 2015 states have (on average 1.327047146401985) internal successors, (2674), 2015 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:38,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 2674 transitions. [2024-10-31 17:23:38,956 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 2674 transitions. Word has length 35 [2024-10-31 17:23:38,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:23:38,957 INFO L471 AbstractCegarLoop]: Abstraction has 2016 states and 2674 transitions. [2024-10-31 17:23:38,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:38,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 2674 transitions. [2024-10-31 17:23:38,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-31 17:23:38,959 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:23:38,959 INFO L215 NwaCegarLoop]: trace histogram [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 17:23:38,976 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 17:23:39,163 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 17:23:39,164 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:23:39,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:23:39,164 INFO L85 PathProgramCache]: Analyzing trace with hash 943013749, now seen corresponding path program 1 times [2024-10-31 17:23:39,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:23:39,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963010893] [2024-10-31 17:23:39,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:23:39,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:23:39,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:23:39,167 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 17:23:39,189 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 17:23:39,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:23:39,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 17:23:39,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:23:39,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 17:23:39,269 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:23:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 17:23:39,308 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:23:39,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963010893] [2024-10-31 17:23:39,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [963010893] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:23:39,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:23:39,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2024-10-31 17:23:39,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044919666] [2024-10-31 17:23:39,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:23:39,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 17:23:39,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:23:39,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 17:23:39,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-31 17:23:39,310 INFO L87 Difference]: Start difference. First operand 2016 states and 2674 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:39,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:23:39,582 INFO L93 Difference]: Finished difference Result 4507 states and 6007 transitions. [2024-10-31 17:23:39,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 17:23:39,582 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-10-31 17:23:39,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:23:39,590 INFO L225 Difference]: With dead ends: 4507 [2024-10-31 17:23:39,590 INFO L226 Difference]: Without dead ends: 2472 [2024-10-31 17:23:39,593 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-31 17:23:39,594 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 121 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 17:23:39,595 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 68 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 17:23:39,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2024-10-31 17:23:39,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2199. [2024-10-31 17:23:39,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2199 states, 2198 states have (on average 1.2875341219290264) internal successors, (2830), 2198 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:39,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 2830 transitions. [2024-10-31 17:23:39,682 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 2830 transitions. Word has length 35 [2024-10-31 17:23:39,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:23:39,682 INFO L471 AbstractCegarLoop]: Abstraction has 2199 states and 2830 transitions. [2024-10-31 17:23:39,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:39,683 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 2830 transitions. [2024-10-31 17:23:39,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-31 17:23:39,684 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:23:39,684 INFO L215 NwaCegarLoop]: trace histogram [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 17:23:39,701 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 17:23:39,884 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 17:23:39,884 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:23:39,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:23:39,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1825348015, now seen corresponding path program 1 times [2024-10-31 17:23:39,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:23:39,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994294145] [2024-10-31 17:23:39,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:23:39,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:23:39,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:23:39,887 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 17:23:39,890 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 17:23:39,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:23:39,942 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 17:23:39,943 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:23:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 17:23:39,985 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:23:40,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 17:23:40,190 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:23:40,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994294145] [2024-10-31 17:23:40,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [994294145] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 17:23:40,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 17:23:40,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2024-10-31 17:23:40,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342363479] [2024-10-31 17:23:40,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 17:23:40,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 17:23:40,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:23:40,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 17:23:40,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-10-31 17:23:40,192 INFO L87 Difference]: Start difference. First operand 2199 states and 2830 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:40,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:23:40,387 INFO L93 Difference]: Finished difference Result 3950 states and 5152 transitions. [2024-10-31 17:23:40,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 17:23:40,388 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-10-31 17:23:40,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:23:40,396 INFO L225 Difference]: With dead ends: 3950 [2024-10-31 17:23:40,396 INFO L226 Difference]: Without dead ends: 3055 [2024-10-31 17:23:40,398 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-10-31 17:23:40,399 INFO L432 NwaCegarLoop]: 117 mSDtfsCounter, 150 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 17:23:40,399 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 381 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 17:23:40,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2024-10-31 17:23:40,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 2183. [2024-10-31 17:23:40,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2183 states, 2182 states have (on average 1.2864344637946838) internal successors, (2807), 2182 states have internal predecessors, (2807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:40,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2183 states to 2183 states and 2807 transitions. [2024-10-31 17:23:40,489 INFO L78 Accepts]: Start accepts. Automaton has 2183 states and 2807 transitions. Word has length 35 [2024-10-31 17:23:40,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:23:40,490 INFO L471 AbstractCegarLoop]: Abstraction has 2183 states and 2807 transitions. [2024-10-31 17:23:40,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:40,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2183 states and 2807 transitions. [2024-10-31 17:23:40,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-31 17:23:40,491 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:23:40,491 INFO L215 NwaCegarLoop]: trace histogram [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 17:23:40,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-31 17:23:40,692 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 17:23:40,692 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:23:40,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:23:40,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1203185278, now seen corresponding path program 1 times [2024-10-31 17:23:40,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:23:40,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239702370] [2024-10-31 17:23:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:23:40,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:23:40,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:23:40,694 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 17:23:40,695 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 17:23:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:23:40,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 17:23:40,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:23:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 17:23:40,797 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:23:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 17:23:40,861 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:23:40,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239702370] [2024-10-31 17:23:40,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1239702370] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:23:40,861 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:23:40,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2024-10-31 17:23:40,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190820475] [2024-10-31 17:23:40,861 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:23:40,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 17:23:40,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:23:40,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 17:23:40,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-10-31 17:23:40,862 INFO L87 Difference]: Start difference. First operand 2183 states and 2807 transitions. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:41,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:23:41,666 INFO L93 Difference]: Finished difference Result 7064 states and 9160 transitions. [2024-10-31 17:23:41,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-31 17:23:41,666 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-10-31 17:23:41,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:23:41,680 INFO L225 Difference]: With dead ends: 7064 [2024-10-31 17:23:41,680 INFO L226 Difference]: Without dead ends: 4948 [2024-10-31 17:23:41,683 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2024-10-31 17:23:41,683 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 378 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-31 17:23:41,684 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 241 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-31 17:23:41,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4948 states. [2024-10-31 17:23:41,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4948 to 3801. [2024-10-31 17:23:41,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3800 states have (on average 1.2528947368421053) internal successors, (4761), 3800 states have internal predecessors, (4761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:41,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 4761 transitions. [2024-10-31 17:23:41,834 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 4761 transitions. Word has length 38 [2024-10-31 17:23:41,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:23:41,834 INFO L471 AbstractCegarLoop]: Abstraction has 3801 states and 4761 transitions. [2024-10-31 17:23:41,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:41,834 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 4761 transitions. [2024-10-31 17:23:41,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-31 17:23:41,836 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:23:41,836 INFO L215 NwaCegarLoop]: trace histogram [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, 1] [2024-10-31 17:23:41,852 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 17:23:42,039 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 17:23:42,040 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:23:42,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:23:42,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1635487431, now seen corresponding path program 1 times [2024-10-31 17:23:42,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:23:42,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375081319] [2024-10-31 17:23:42,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:23:42,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:23:42,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:23:42,042 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 17:23:42,042 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 17:23:42,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:23:42,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 17:23:42,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:23:42,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 17:23:42,112 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:23:42,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 17:23:42,124 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:23:42,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375081319] [2024-10-31 17:23:42,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [375081319] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 17:23:42,124 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 17:23:42,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2024-10-31 17:23:42,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796433528] [2024-10-31 17:23:42,124 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 17:23:42,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 17:23:42,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:23:42,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 17:23:42,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-31 17:23:42,125 INFO L87 Difference]: Start difference. First operand 3801 states and 4761 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:42,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:23:42,460 INFO L93 Difference]: Finished difference Result 8814 states and 10929 transitions. [2024-10-31 17:23:42,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 17:23:42,461 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-10-31 17:23:42,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:23:42,477 INFO L225 Difference]: With dead ends: 8814 [2024-10-31 17:23:42,477 INFO L226 Difference]: Without dead ends: 4871 [2024-10-31 17:23:42,483 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-10-31 17:23:42,483 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 125 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 17:23:42,483 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 73 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 17:23:42,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2024-10-31 17:23:42,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 4292. [2024-10-31 17:23:42,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4292 states, 4291 states have (on average 1.217431834071312) internal successors, (5224), 4291 states have internal predecessors, (5224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:42,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 5224 transitions. [2024-10-31 17:23:42,673 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 5224 transitions. Word has length 39 [2024-10-31 17:23:42,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:23:42,674 INFO L471 AbstractCegarLoop]: Abstraction has 4292 states and 5224 transitions. [2024-10-31 17:23:42,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:42,674 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 5224 transitions. [2024-10-31 17:23:42,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-31 17:23:42,676 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:23:42,676 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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 17:23:42,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-31 17:23:42,877 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 17:23:42,877 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:23:42,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:23:42,877 INFO L85 PathProgramCache]: Analyzing trace with hash 945650591, now seen corresponding path program 1 times [2024-10-31 17:23:42,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:23:42,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006349035] [2024-10-31 17:23:42,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:23:42,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:23:42,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:23:42,880 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 17:23:42,881 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 17:23:42,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 17:23:42,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-31 17:23:42,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 17:23:44,866 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 17:23:44,866 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 17:23:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 17:23:46,320 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 17:23:46,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006349035] [2024-10-31 17:23:46,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2006349035] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 17:23:46,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 17:23:46,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2024-10-31 17:23:46,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224749752] [2024-10-31 17:23:46,321 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 17:23:46,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-31 17:23:46,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 17:23:46,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-31 17:23:46,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2024-10-31 17:23:46,323 INFO L87 Difference]: Start difference. First operand 4292 states and 5224 transitions. Second operand has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:52,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 17:23:52,994 INFO L93 Difference]: Finished difference Result 5553 states and 6765 transitions. [2024-10-31 17:23:52,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-10-31 17:23:52,995 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2024-10-31 17:23:52,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 17:23:53,010 INFO L225 Difference]: With dead ends: 5553 [2024-10-31 17:23:53,010 INFO L226 Difference]: Without dead ends: 5149 [2024-10-31 17:23:53,025 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1730, Invalid=5410, Unknown=0, NotChecked=0, Total=7140 [2024-10-31 17:23:53,026 INFO L432 NwaCegarLoop]: 344 mSDtfsCounter, 1577 mSDsluCounter, 5483 mSDsCounter, 0 mSdLazyCounter, 2828 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1577 SdHoareTripleChecker+Valid, 5827 SdHoareTripleChecker+Invalid, 2873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-10-31 17:23:53,026 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1577 Valid, 5827 Invalid, 2873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2828 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-10-31 17:23:53,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5149 states. [2024-10-31 17:23:53,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5149 to 4535. [2024-10-31 17:23:53,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4535 states, 4534 states have (on average 1.215262461402735) internal successors, (5510), 4534 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:53,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4535 states to 4535 states and 5510 transitions. [2024-10-31 17:23:53,328 INFO L78 Accepts]: Start accepts. Automaton has 4535 states and 5510 transitions. Word has length 51 [2024-10-31 17:23:53,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 17:23:53,329 INFO L471 AbstractCegarLoop]: Abstraction has 4535 states and 5510 transitions. [2024-10-31 17:23:53,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 17:23:53,329 INFO L276 IsEmpty]: Start isEmpty. Operand 4535 states and 5510 transitions. [2024-10-31 17:23:53,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-31 17:23:53,332 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 17:23:53,332 INFO L215 NwaCegarLoop]: trace histogram [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 17:23:53,349 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 17:23:53,533 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 17:23:53,533 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 17:23:53,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 17:23:53,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1950719985, now seen corresponding path program 1 times [2024-10-31 17:23:53,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 17:23:53,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72569513] [2024-10-31 17:23:53,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 17:23:53,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 17:23:53,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 17:23:53,535 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 17:23:53,536 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 17:23:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 17:23:53,588 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-31 17:23:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 17:23:53,640 INFO L130 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2024-10-31 17:23:53,640 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-31 17:23:53,641 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-31 17:23:53,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-31 17:23:53,843 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 17:23:53,846 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 17:23:53,906 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-10-31 17:23:53,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.10 05:23:53 BoogieIcfgContainer [2024-10-31 17:23:53,909 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-31 17:23:53,909 INFO L158 Benchmark]: Toolchain (without parser) took 23504.49ms. Allocated memory was 211.8MB in the beginning and 520.1MB in the end (delta: 308.3MB). Free memory was 174.8MB in the beginning and 444.6MB in the end (delta: -269.7MB). Peak memory consumption was 40.1MB. Max. memory is 8.0GB. [2024-10-31 17:23:53,910 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 211.8MB. Free memory is still 188.8MB. There was no memory consumed. Max. memory is 8.0GB. [2024-10-31 17:23:53,910 INFO L158 Benchmark]: CACSL2BoogieTranslator took 305.92ms. Allocated memory is still 211.8MB. Free memory was 174.8MB in the beginning and 160.1MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2024-10-31 17:23:53,910 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.46ms. Allocated memory is still 211.8MB. Free memory was 160.1MB in the beginning and 158.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2024-10-31 17:23:53,910 INFO L158 Benchmark]: Boogie Preprocessor took 63.70ms. Allocated memory is still 211.8MB. Free memory was 158.1MB in the beginning and 156.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2024-10-31 17:23:53,911 INFO L158 Benchmark]: RCFGBuilder took 524.91ms. Allocated memory is still 211.8MB. Free memory was 156.0MB in the beginning and 138.7MB in the end (delta: 17.3MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2024-10-31 17:23:53,911 INFO L158 Benchmark]: TraceAbstraction took 22561.25ms. Allocated memory was 211.8MB in the beginning and 520.1MB in the end (delta: 308.3MB). Free memory was 138.2MB in the beginning and 444.6MB in the end (delta: -306.4MB). Peak memory consumption was 3.4MB. Max. memory is 8.0GB. [2024-10-31 17:23:53,912 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 211.8MB. Free memory is still 188.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 305.92ms. Allocated memory is still 211.8MB. Free memory was 174.8MB in the beginning and 160.1MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 43.46ms. Allocated memory is still 211.8MB. Free memory was 160.1MB in the beginning and 158.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 63.70ms. Allocated memory is still 211.8MB. Free memory was 158.1MB in the beginning and 156.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 524.91ms. Allocated memory is still 211.8MB. Free memory was 156.0MB in the beginning and 138.7MB in the end (delta: 17.3MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * TraceAbstraction took 22561.25ms. Allocated memory was 211.8MB in the beginning and 520.1MB in the end (delta: 308.3MB). Free memory was 138.2MB in the beginning and 444.6MB in the end (delta: -306.4MB). Peak memory consumption was 3.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 25]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L124] unsigned int a, b, r; [L126] a = __VERIFIER_nondet_uint() [L127] b = __VERIFIER_nondet_uint() [L129] CALL, EXPR mp_add(a, b) [L42] unsigned char a0, a1, a2, a3; [L43] unsigned char b0, b1, b2, b3; [L44] unsigned char r0, r1, r2, r3; [L45] unsigned short carry; [L46] unsigned short partial_sum; [L47] unsigned int r; [L48] unsigned char i; [L49] unsigned char na, nb; [L50] a0 = a [L51] a1 = a >> 8 [L52] a2 = a >> 16U [L53] a3 = a >> 24U [L54] b0 = b [L55] b1 = b >> 8U [L56] b2 = b >> 16U [L57] b3 = b >> 24U [L58] na = (unsigned char)4 VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, na=4] [L59] COND TRUE a3 == (unsigned char)0 [L60] na = na - 1 VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, na=3] [L61] COND TRUE a2 == (unsigned char)0 [L62] na = na - 1 VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, na=2] [L63] COND TRUE a1 == (unsigned char)0 [L64] na = na - 1 VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, na=1] [L68] nb = (unsigned char)4 VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, na=1, nb=4] [L69] COND TRUE b3 == (unsigned char)0 [L70] nb = nb - 1 VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, na=1, nb=3] [L71] COND TRUE b2 == (unsigned char)0 [L72] nb = nb - 1 VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, na=1, nb=2] [L73] COND TRUE b1 == (unsigned char)0 [L74] nb = nb - 1 VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, na=1, nb=1] [L78] carry = (unsigned short)0 [L79] i = (unsigned char)0 VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L83] COND TRUE i < na VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L84] COND TRUE i == (unsigned char)0 [L84] partial_sum = partial_sum + a0 VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=15] [L85] COND FALSE !(i == (unsigned char)1) VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=15] [L86] COND FALSE !(i == (unsigned char)2) VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=15] [L87] COND FALSE !(i == (unsigned char)3) VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=15] [L89] COND TRUE i < nb VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=15] [L90] COND TRUE i == (unsigned char)0 [L90] partial_sum = partial_sum + b0 VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=255] [L91] COND FALSE !(i == (unsigned char)1) VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=255] [L92] COND FALSE !(i == (unsigned char)2) VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=255] [L93] COND FALSE !(i == (unsigned char)3) VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=255] [L95] COND TRUE partial_sum > ((unsigned char)254) [L96] partial_sum = partial_sum & ((unsigned char)255) [L97] carry = (unsigned short)1 VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255] [L99] COND TRUE i == (unsigned char)0 [L99] r0 = (unsigned char)partial_sum VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255, r0=-1] [L100] COND FALSE !(i == (unsigned char)1) VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255, r0=-1] [L101] COND FALSE !(i == (unsigned char)2) VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255, r0=-1] [L102] COND FALSE !(i == (unsigned char)3) VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255, r0=-1] [L104] i = i + (unsigned char)1 VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=1, i=1, na=1, nb=1, partial_sum=255, r0=-1] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L83] COND FALSE !(i < na) VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L89] COND FALSE !(i < nb) VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L95] COND FALSE !(partial_sum > ((unsigned char)254)) VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L99] COND FALSE !(i == (unsigned char)0) VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L100] COND TRUE i == (unsigned char)1 [L100] r1 = (unsigned char)partial_sum VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L101] COND FALSE !(i == (unsigned char)2) VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L102] COND FALSE !(i == (unsigned char)3) VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L104] i = i + (unsigned char)1 VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L80] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, i=2, partial_sum=1, r0=-1, r1=1] [L107] COND TRUE i < (unsigned char)4 VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, i=2, partial_sum=1, r0=-1, r1=1] [L108] COND FALSE !(i == (unsigned char)0) VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, i=2, partial_sum=1, r0=-1, r1=1] [L109] COND FALSE !(i == (unsigned char)1) VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, i=2, partial_sum=1, r0=-1, r1=1] [L110] COND TRUE i == (unsigned char)2 [L110] r2 = (unsigned char)0 VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, i=2, partial_sum=1, r0=-1, r1=1, r2=0] [L111] COND FALSE !(i == (unsigned char)3) VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, i=2, partial_sum=1, r0=-1, r1=1, r2=0] [L113] i = i + (unsigned char)1 VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, i=3, partial_sum=1, r0=-1, r1=1, r2=0] [L107] COND TRUE i < (unsigned char)4 VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, i=3, partial_sum=1, r0=-1, r1=1, r2=0] [L108] COND FALSE !(i == (unsigned char)0) VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, i=3, partial_sum=1, r0=-1, r1=1, r2=0] [L109] COND FALSE !(i == (unsigned char)1) VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, i=3, partial_sum=1, r0=-1, r1=1, r2=0] [L110] COND FALSE !(i == (unsigned char)2) VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, i=3, partial_sum=1, r0=-1, r1=1, r2=0] [L111] COND TRUE i == (unsigned char)3 [L111] r3 = (unsigned char)0 VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, i=3, partial_sum=1, r0=-1, r1=1, r2=0, r3=0] [L113] i = i + (unsigned char)1 VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, i=4, partial_sum=1, r0=-1, r1=1, r2=0, r3=0] [L107] COND FALSE !(i < (unsigned char)4) VAL [a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, partial_sum=1, r0=-1, r1=1, r2=0, r3=0] [L116] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L118] return r; VAL [\result=511, a0=15, a1=0, a2=0, a3=0, b0=-16, b1=0, b2=0, b3=0, partial_sum=1] [L129] RET, EXPR mp_add(a, b) [L129] r = mp_add(a, b) [L131] CALL __VERIFIER_assert(r == a + b) [L24] COND TRUE !(cond) [L25] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 22.4s, OverallIterations: 17, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 11.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4210 SdHoareTripleChecker+Valid, 5.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4210 mSDsluCounter, 8721 SdHoareTripleChecker+Invalid, 4.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7374 mSDsCounter, 472 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6132 IncrementalHoareTripleChecker+Invalid, 6604 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 472 mSolverCounterUnsat, 1347 mSDtfsCounter, 6132 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1046 GetRequests, 842 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 6.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4535occurred in iteration=16, InterpolantAutomatonStates: 170, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 5039 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 548 NumberOfCodeBlocks, 548 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 956 ConstructedInterpolants, 57 QuantifiedInterpolants, 6545 SizeOfPredicates, 21 NumberOfNonLiveVariables, 1039 ConjunctsInSsa, 96 ConjunctsInUnsatCore, 32 InterpolantComputations, 25 PerfectInterpolantSequences, 118/144 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-10-31 17:23:53,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...