./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/watermelon.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/watermelon.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dda0b992ac1600896503297d86377b482d0a82ded923ea00c7e9ff3fed4db7e7 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-23 23:59:54,261 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-23 23:59:54,337 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-23 23:59:54,342 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-23 23:59:54,343 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-23 23:59:54,362 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-23 23:59:54,363 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-23 23:59:54,363 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-23 23:59:54,364 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-23 23:59:54,364 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-23 23:59:54,364 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-23 23:59:54,365 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-23 23:59:54,365 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-23 23:59:54,366 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-23 23:59:54,366 INFO L153 SettingsManager]: * Use SBE=true [2024-10-23 23:59:54,367 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-23 23:59:54,367 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-23 23:59:54,367 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-23 23:59:54,368 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-23 23:59:54,368 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-23 23:59:54,368 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-23 23:59:54,372 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-23 23:59:54,373 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-23 23:59:54,373 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-23 23:59:54,373 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-23 23:59:54,373 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-23 23:59:54,374 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-23 23:59:54,374 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-23 23:59:54,374 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-23 23:59:54,375 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-23 23:59:54,375 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-23 23:59:54,375 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-23 23:59:54,375 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 23:59:54,376 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-23 23:59:54,376 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-23 23:59:54,379 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-23 23:59:54,379 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-23 23:59:54,379 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-23 23:59:54,380 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-23 23:59:54,380 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-23 23:59:54,380 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-23 23:59:54,380 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-23 23:59:54,381 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda0b992ac1600896503297d86377b482d0a82ded923ea00c7e9ff3fed4db7e7 [2024-10-23 23:59:54,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-23 23:59:54,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-23 23:59:54,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-23 23:59:54,641 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-23 23:59:54,641 INFO L274 PluginConnector]: CDTParser initialized [2024-10-23 23:59:54,642 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/watermelon.c [2024-10-23 23:59:56,072 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-23 23:59:56,237 INFO L384 CDTParser]: Found 1 translation units. [2024-10-23 23:59:56,237 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/watermelon.c [2024-10-23 23:59:56,244 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7363acd3d/eb1e0e5071964607a11b2950124f9157/FLAG310dcb8bc [2024-10-23 23:59:56,259 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7363acd3d/eb1e0e5071964607a11b2950124f9157 [2024-10-23 23:59:56,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-23 23:59:56,263 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-23 23:59:56,264 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-23 23:59:56,265 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-23 23:59:56,270 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-23 23:59:56,270 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 11:59:56" (1/1) ... [2024-10-23 23:59:56,272 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@527c8fb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:59:56, skipping insertion in model container [2024-10-23 23:59:56,274 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 11:59:56" (1/1) ... [2024-10-23 23:59:56,296 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-23 23:59:56,473 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/watermelon.c[373,386] [2024-10-23 23:59:56,492 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 23:59:56,500 INFO L200 MainTranslator]: Completed pre-run [2024-10-23 23:59:56,513 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/watermelon.c[373,386] [2024-10-23 23:59:56,522 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 23:59:56,538 INFO L204 MainTranslator]: Completed translation [2024-10-23 23:59:56,539 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:59:56 WrapperNode [2024-10-23 23:59:56,539 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-23 23:59:56,540 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-23 23:59:56,540 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-23 23:59:56,540 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-23 23:59:56,548 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:59:56" (1/1) ... [2024-10-23 23:59:56,554 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:59:56" (1/1) ... [2024-10-23 23:59:56,570 INFO L138 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-10-23 23:59:56,571 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-23 23:59:56,572 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-23 23:59:56,572 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-23 23:59:56,572 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-23 23:59:56,580 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:59:56" (1/1) ... [2024-10-23 23:59:56,580 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:59:56" (1/1) ... [2024-10-23 23:59:56,581 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:59:56" (1/1) ... [2024-10-23 23:59:56,590 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]. [2024-10-23 23:59:56,591 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:59:56" (1/1) ... [2024-10-23 23:59:56,591 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:59:56" (1/1) ... [2024-10-23 23:59:56,594 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:59:56" (1/1) ... [2024-10-23 23:59:56,601 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:59:56" (1/1) ... [2024-10-23 23:59:56,605 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:59:56" (1/1) ... [2024-10-23 23:59:56,606 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:59:56" (1/1) ... [2024-10-23 23:59:56,608 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-23 23:59:56,609 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-23 23:59:56,609 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-23 23:59:56,609 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-23 23:59:56,610 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:59:56" (1/1) ... [2024-10-23 23:59:56,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 23:59:56,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:59:56,646 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) [2024-10-23 23:59:56,650 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 [2024-10-23 23:59:56,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-23 23:59:56,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-23 23:59:56,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-23 23:59:56,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-23 23:59:56,767 INFO L238 CfgBuilder]: Building ICFG [2024-10-23 23:59:56,769 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-23 23:59:56,919 INFO L? ?]: Removed 27 outVars from TransFormulas that were not future-live. [2024-10-23 23:59:56,920 INFO L287 CfgBuilder]: Performing block encoding [2024-10-23 23:59:56,957 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-23 23:59:56,958 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-23 23:59:56,958 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 11:59:56 BoogieIcfgContainer [2024-10-23 23:59:56,958 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-23 23:59:56,961 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-23 23:59:56,961 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-23 23:59:56,964 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-23 23:59:56,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 11:59:56" (1/3) ... [2024-10-23 23:59:56,965 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe4bd7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 11:59:56, skipping insertion in model container [2024-10-23 23:59:56,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:59:56" (2/3) ... [2024-10-23 23:59:56,966 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe4bd7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 11:59:56, skipping insertion in model container [2024-10-23 23:59:56,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 11:59:56" (3/3) ... [2024-10-23 23:59:56,967 INFO L112 eAbstractionObserver]: Analyzing ICFG watermelon.c [2024-10-23 23:59:56,988 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-23 23:59:56,988 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-23 23:59:57,038 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-23 23:59:57,046 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;@3813f039, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-23 23:59:57,047 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-23 23:59:57,053 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 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) [2024-10-23 23:59:57,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-23 23:59:57,060 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:59:57,061 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:59:57,063 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:59:57,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:59:57,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1564077685, now seen corresponding path program 1 times [2024-10-23 23:59:57,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:59:57,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168578669] [2024-10-23 23:59:57,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:59:57,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:59:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:59:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 23:59:57,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:59:57,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168578669] [2024-10-23 23:59:57,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168578669] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 23:59:57,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 23:59:57,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-23 23:59:57,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452963858] [2024-10-23 23:59:57,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 23:59:57,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-23 23:59:57,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:59:57,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-23 23:59:57,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-23 23:59:57,502 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 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) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:59:57,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:59:57,584 INFO L93 Difference]: Finished difference Result 42 states and 61 transitions. [2024-10-23 23:59:57,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-23 23:59:57,587 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2024-10-23 23:59:57,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:59:57,594 INFO L225 Difference]: With dead ends: 42 [2024-10-23 23:59:57,594 INFO L226 Difference]: Without dead ends: 22 [2024-10-23 23:59:57,597 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-23 23:59:57,601 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 23:59:57,602 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 68 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 23:59:57,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-23 23:59:57,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2024-10-23 23:59:57,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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) [2024-10-23 23:59:57,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2024-10-23 23:59:57,628 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 8 [2024-10-23 23:59:57,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:59:57,628 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2024-10-23 23:59:57,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:59:57,628 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2024-10-23 23:59:57,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-23 23:59:57,629 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:59:57,629 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:59:57,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-23 23:59:57,630 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:59:57,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:59:57,630 INFO L85 PathProgramCache]: Analyzing trace with hash -97791536, now seen corresponding path program 1 times [2024-10-23 23:59:57,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:59:57,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55208953] [2024-10-23 23:59:57,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:59:57,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:59:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:59:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 23:59:57,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:59:57,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55208953] [2024-10-23 23:59:57,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55208953] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 23:59:57,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 23:59:57,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-23 23:59:57,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906129072] [2024-10-23 23:59:57,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 23:59:57,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-23 23:59:57,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:59:57,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-23 23:59:57,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-23 23:59:57,889 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:59:57,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:59:57,947 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2024-10-23 23:59:57,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-23 23:59:57,948 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-23 23:59:57,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:59:57,949 INFO L225 Difference]: With dead ends: 29 [2024-10-23 23:59:57,949 INFO L226 Difference]: Without dead ends: 20 [2024-10-23 23:59:57,950 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-23 23:59:57,952 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 23:59:57,953 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 33 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 23:59:57,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-23 23:59:57,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-23 23:59:57,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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) [2024-10-23 23:59:57,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2024-10-23 23:59:57,961 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2024-10-23 23:59:57,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:59:57,961 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2024-10-23 23:59:57,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:59:57,962 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2024-10-23 23:59:57,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-23 23:59:57,964 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:59:57,964 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:59:57,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-23 23:59:57,965 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:59:57,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:59:57,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1563678511, now seen corresponding path program 1 times [2024-10-23 23:59:57,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:59:57,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207070387] [2024-10-23 23:59:57,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:59:57,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:59:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:59:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 23:59:58,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:59:58,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207070387] [2024-10-23 23:59:58,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207070387] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 23:59:58,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 23:59:58,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-23 23:59:58,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793043445] [2024-10-23 23:59:58,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 23:59:58,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-23 23:59:58,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:59:58,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-23 23:59:58,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 23:59:58,059 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:59:58,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:59:58,086 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2024-10-23 23:59:58,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-23 23:59:58,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-23 23:59:58,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:59:58,088 INFO L225 Difference]: With dead ends: 37 [2024-10-23 23:59:58,089 INFO L226 Difference]: Without dead ends: 21 [2024-10-23 23:59:58,089 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 23:59:58,090 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 23:59:58,090 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 23:59:58,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-23 23:59:58,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-23 23:59:58,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 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) [2024-10-23 23:59:58,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2024-10-23 23:59:58,099 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 11 [2024-10-23 23:59:58,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:59:58,100 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2024-10-23 23:59:58,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:59:58,103 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2024-10-23 23:59:58,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-23 23:59:58,104 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:59:58,104 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:59:58,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-23 23:59:58,104 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:59:58,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:59:58,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1704256970, now seen corresponding path program 1 times [2024-10-23 23:59:58,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:59:58,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174089812] [2024-10-23 23:59:58,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:59:58,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:59:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:59:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 23:59:58,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:59:58,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174089812] [2024-10-23 23:59:58,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174089812] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:59:58,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106207782] [2024-10-23 23:59:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:59:58,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:59:58,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:59:58,190 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) [2024-10-23 23:59:58,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-23 23:59:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:59:58,240 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-23 23:59:58,244 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:59:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 23:59:58,303 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:59:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 23:59:58,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106207782] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 23:59:58,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 23:59:58,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-10-23 23:59:58,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727522157] [2024-10-23 23:59:58,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 23:59:58,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-23 23:59:58,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:59:58,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-23 23:59:58,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-10-23 23:59:58,331 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:59:58,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:59:58,371 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2024-10-23 23:59:58,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-23 23:59:58,372 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-23 23:59:58,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:59:58,372 INFO L225 Difference]: With dead ends: 38 [2024-10-23 23:59:58,373 INFO L226 Difference]: Without dead ends: 22 [2024-10-23 23:59:58,373 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-10-23 23:59:58,375 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 23:59:58,376 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 23:59:58,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-23 23:59:58,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-10-23 23:59:58,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 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) [2024-10-23 23:59:58,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2024-10-23 23:59:58,383 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 12 [2024-10-23 23:59:58,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:59:58,384 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2024-10-23 23:59:58,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:59:58,384 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2024-10-23 23:59:58,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-23 23:59:58,385 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:59:58,385 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:59:58,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-23 23:59:58,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:59:58,590 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:59:58,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:59:58,590 INFO L85 PathProgramCache]: Analyzing trace with hash 68958223, now seen corresponding path program 2 times [2024-10-23 23:59:58,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:59:58,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855279852] [2024-10-23 23:59:58,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:59:58,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:59:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:59:58,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-23 23:59:58,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:59:58,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855279852] [2024-10-23 23:59:58,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855279852] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 23:59:58,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 23:59:58,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-23 23:59:58,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743741273] [2024-10-23 23:59:58,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 23:59:58,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-23 23:59:58,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:59:58,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-23 23:59:58,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-23 23:59:58,774 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2024-10-23 23:59:58,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:59:58,829 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2024-10-23 23:59:58,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-23 23:59:58,830 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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 13 [2024-10-23 23:59:58,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:59:58,830 INFO L225 Difference]: With dead ends: 26 [2024-10-23 23:59:58,831 INFO L226 Difference]: Without dead ends: 22 [2024-10-23 23:59:58,831 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-23 23:59:58,833 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 23:59:58,833 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 21 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 23:59:58,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-23 23:59:58,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-10-23 23:59:58,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2024-10-23 23:59:58,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2024-10-23 23:59:58,842 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2024-10-23 23:59:58,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:59:58,842 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2024-10-23 23:59:58,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2024-10-23 23:59:58,842 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2024-10-23 23:59:58,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-23 23:59:58,843 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:59:58,843 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:59:58,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-23 23:59:58,843 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:59:58,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:59:58,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1997797448, now seen corresponding path program 1 times [2024-10-23 23:59:58,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:59:58,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185047004] [2024-10-23 23:59:58,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:59:58,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:59:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:59:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-23 23:59:58,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:59:58,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185047004] [2024-10-23 23:59:58,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185047004] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 23:59:58,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 23:59:58,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-23 23:59:58,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926027379] [2024-10-23 23:59:58,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 23:59:58,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-23 23:59:58,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:59:58,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-23 23:59:58,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 23:59:58,902 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2024-10-23 23:59:58,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:59:58,922 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2024-10-23 23:59:58,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-23 23:59:58,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 16 [2024-10-23 23:59:58,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:59:58,924 INFO L225 Difference]: With dead ends: 31 [2024-10-23 23:59:58,925 INFO L226 Difference]: Without dead ends: 24 [2024-10-23 23:59:58,925 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 23:59:58,925 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 23:59:58,926 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 23:59:58,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-23 23:59:58,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-10-23 23:59:58,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2024-10-23 23:59:58,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-10-23 23:59:58,933 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2024-10-23 23:59:58,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:59:58,934 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-10-23 23:59:58,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2024-10-23 23:59:58,934 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-10-23 23:59:58,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-23 23:59:58,935 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:59:58,935 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:59:58,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-23 23:59:58,935 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:59:58,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:59:58,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1654530356, now seen corresponding path program 1 times [2024-10-23 23:59:58,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:59:58,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795529511] [2024-10-23 23:59:58,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:59:58,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:59:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:59:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-23 23:59:59,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:59:59,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795529511] [2024-10-23 23:59:59,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795529511] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:59:59,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405584454] [2024-10-23 23:59:59,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:59:59,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:59:59,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:59:59,015 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) [2024-10-23 23:59:59,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-23 23:59:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:59:59,063 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-23 23:59:59,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:59:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-23 23:59:59,093 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:59:59,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-23 23:59:59,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405584454] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 23:59:59,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 23:59:59,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2024-10-23 23:59:59,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175282282] [2024-10-23 23:59:59,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 23:59:59,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-23 23:59:59,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:59:59,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-23 23:59:59,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-23 23:59:59,131 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:59:59,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:59:59,178 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2024-10-23 23:59:59,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-23 23:59:59,178 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-10-23 23:59:59,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:59:59,179 INFO L225 Difference]: With dead ends: 40 [2024-10-23 23:59:59,179 INFO L226 Difference]: Without dead ends: 28 [2024-10-23 23:59:59,180 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-23 23:59:59,180 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 23:59:59,181 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 23:59:59,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-23 23:59:59,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-10-23 23:59:59,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:59:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2024-10-23 23:59:59,190 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 17 [2024-10-23 23:59:59,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:59:59,190 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2024-10-23 23:59:59,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:59:59,191 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2024-10-23 23:59:59,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-23 23:59:59,191 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:59:59,191 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:59:59,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-23 23:59:59,392 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,SelfDestructingSolverStorable6 [2024-10-23 23:59:59,392 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:59:59,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:59:59,393 INFO L85 PathProgramCache]: Analyzing trace with hash -831106316, now seen corresponding path program 1 times [2024-10-23 23:59:59,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:59:59,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607356845] [2024-10-23 23:59:59,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:59:59,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:59:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:59:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-23 23:59:59,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:59:59,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607356845] [2024-10-23 23:59:59,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607356845] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:59:59,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807093046] [2024-10-23 23:59:59,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:59:59,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:59:59,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:59:59,461 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) [2024-10-23 23:59:59,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-23 23:59:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:59:59,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-23 23:59:59,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:59:59,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-23 23:59:59,586 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:59:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-23 23:59:59,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807093046] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 23:59:59,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 23:59:59,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-10-23 23:59:59,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709085158] [2024-10-23 23:59:59,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 23:59:59,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-23 23:59:59,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:59:59,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-23 23:59:59,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-10-23 23:59:59,625 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:59:59,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:59:59,674 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2024-10-23 23:59:59,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-23 23:59:59,675 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-23 23:59:59,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:59:59,679 INFO L225 Difference]: With dead ends: 37 [2024-10-23 23:59:59,680 INFO L226 Difference]: Without dead ends: 32 [2024-10-23 23:59:59,680 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-10-23 23:59:59,680 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 23:59:59,681 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 23:59:59,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-23 23:59:59,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2024-10-23 23:59:59,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 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) [2024-10-23 23:59:59,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2024-10-23 23:59:59,688 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2024-10-23 23:59:59,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:59:59,689 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-10-23 23:59:59,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:59:59,689 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2024-10-23 23:59:59,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-23 23:59:59,689 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:59:59,689 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:59:59,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-23 23:59:59,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:59:59,891 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:59:59,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:59:59,891 INFO L85 PathProgramCache]: Analyzing trace with hash -829259274, now seen corresponding path program 1 times [2024-10-23 23:59:59,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:59:59,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918355476] [2024-10-23 23:59:59,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:59:59,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:59:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:59:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-23 23:59:59,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:59:59,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918355476] [2024-10-23 23:59:59,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918355476] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 23:59:59,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 23:59:59,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-23 23:59:59,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104246079] [2024-10-23 23:59:59,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 23:59:59,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-23 23:59:59,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:59:59,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-23 23:59:59,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-23 23:59:59,961 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:59:59,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:59:59,986 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2024-10-23 23:59:59,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-23 23:59:59,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-23 23:59:59,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:59:59,987 INFO L225 Difference]: With dead ends: 35 [2024-10-23 23:59:59,988 INFO L226 Difference]: Without dead ends: 29 [2024-10-23 23:59:59,988 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-23 23:59:59,989 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 23:59:59,990 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 23:59:59,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-23 23:59:59,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-10-23 23:59:59,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:59:59,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-10-23 23:59:59,999 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 18 [2024-10-23 23:59:59,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:59:59,999 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-10-24 00:00:00,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:00,001 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-10-24 00:00:00,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-24 00:00:00,001 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:00,001 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:00,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-24 00:00:00,002 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:00,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:00,002 INFO L85 PathProgramCache]: Analyzing trace with hash -777338956, now seen corresponding path program 2 times [2024-10-24 00:00:00,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:00,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226102900] [2024-10-24 00:00:00,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:00,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:00,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:00,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:00,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226102900] [2024-10-24 00:00:00,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226102900] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:00,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603705622] [2024-10-24 00:00:00,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 00:00:00,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:00,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:00,281 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) [2024-10-24 00:00:00,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 00:00:00,325 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 00:00:00,326 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:00,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 00:00:00,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:00,617 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:00,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603705622] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:00,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:00,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2024-10-24 00:00:00,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11432152] [2024-10-24 00:00:00,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:00,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-24 00:00:00,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:00,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-24 00:00:00,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2024-10-24 00:00:00,822 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:00,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:00,937 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2024-10-24 00:00:00,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-24 00:00:00,937 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-24 00:00:00,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:00,938 INFO L225 Difference]: With dead ends: 42 [2024-10-24 00:00:00,938 INFO L226 Difference]: Without dead ends: 28 [2024-10-24 00:00:00,939 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2024-10-24 00:00:00,939 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:00,940 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 33 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:00,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-24 00:00:00,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-10-24 00:00:00,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:00,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2024-10-24 00:00:00,947 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 19 [2024-10-24 00:00:00,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:00,948 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2024-10-24 00:00:00,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:00,948 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2024-10-24 00:00:00,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-24 00:00:00,949 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:00,950 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:00,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 00:00:01,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:01,150 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:01,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:01,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1274990161, now seen corresponding path program 2 times [2024-10-24 00:00:01,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:01,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522089606] [2024-10-24 00:00:01,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:01,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:01,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:01,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:01,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522089606] [2024-10-24 00:00:01,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522089606] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:01,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937280469] [2024-10-24 00:00:01,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 00:00:01,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:01,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:01,456 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) [2024-10-24 00:00:01,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 00:00:01,500 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 00:00:01,500 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:01,502 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 00:00:01,503 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:01,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:01,769 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:01,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937280469] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:01,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:01,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2024-10-24 00:00:01,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267578604] [2024-10-24 00:00:01,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:01,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-24 00:00:01,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:01,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-24 00:00:01,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2024-10-24 00:00:01,987 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2024-10-24 00:00:02,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:02,140 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2024-10-24 00:00:02,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 00:00:02,141 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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 19 [2024-10-24 00:00:02,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:02,141 INFO L225 Difference]: With dead ends: 35 [2024-10-24 00:00:02,141 INFO L226 Difference]: Without dead ends: 29 [2024-10-24 00:00:02,142 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2024-10-24 00:00:02,142 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:02,143 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 55 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:02,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-24 00:00:02,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-10-24 00:00:02,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:02,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2024-10-24 00:00:02,148 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 19 [2024-10-24 00:00:02,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:02,149 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2024-10-24 00:00:02,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2024-10-24 00:00:02,149 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2024-10-24 00:00:02,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-24 00:00:02,150 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:02,150 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:02,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-24 00:00:02,350 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,SelfDestructingSolverStorable10 [2024-10-24 00:00:02,351 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:02,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:02,351 INFO L85 PathProgramCache]: Analyzing trace with hash 31731131, now seen corresponding path program 3 times [2024-10-24 00:00:02,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:02,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478111759] [2024-10-24 00:00:02,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:02,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:02,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:02,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478111759] [2024-10-24 00:00:02,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478111759] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:02,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459170132] [2024-10-24 00:00:02,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 00:00:02,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:02,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:02,724 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) [2024-10-24 00:00:02,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 00:00:02,769 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-24 00:00:02,769 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:02,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-24 00:00:02,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:03,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:03,136 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:03,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459170132] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:03,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:03,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2024-10-24 00:00:03,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546557417] [2024-10-24 00:00:03,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:03,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-24 00:00:03,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:03,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-24 00:00:03,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2024-10-24 00:00:03,435 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:03,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:03,695 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2024-10-24 00:00:03,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-24 00:00:03,696 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-24 00:00:03,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:03,696 INFO L225 Difference]: With dead ends: 46 [2024-10-24 00:00:03,697 INFO L226 Difference]: Without dead ends: 31 [2024-10-24 00:00:03,697 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2024-10-24 00:00:03,698 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:03,698 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 54 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 00:00:03,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-24 00:00:03,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-10-24 00:00:03,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2024-10-24 00:00:03,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-10-24 00:00:03,704 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 20 [2024-10-24 00:00:03,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:03,704 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-10-24 00:00:03,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:03,704 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-10-24 00:00:03,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-24 00:00:03,704 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:03,705 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:03,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-24 00:00:03,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:03,905 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:03,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:03,906 INFO L85 PathProgramCache]: Analyzing trace with hash -556921925, now seen corresponding path program 3 times [2024-10-24 00:00:03,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:03,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304089845] [2024-10-24 00:00:03,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:03,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:04,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:04,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304089845] [2024-10-24 00:00:04,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304089845] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:04,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141357432] [2024-10-24 00:00:04,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 00:00:04,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:04,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:04,254 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) [2024-10-24 00:00:04,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 00:00:04,299 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-24 00:00:04,299 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:04,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-24 00:00:04,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:04,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:04,623 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:04,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:04,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141357432] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:04,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:04,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2024-10-24 00:00:04,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071270871] [2024-10-24 00:00:04,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:04,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-24 00:00:04,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:04,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-24 00:00:04,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2024-10-24 00:00:04,880 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:05,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:05,012 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2024-10-24 00:00:05,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-24 00:00:05,013 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-24 00:00:05,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:05,013 INFO L225 Difference]: With dead ends: 40 [2024-10-24 00:00:05,013 INFO L226 Difference]: Without dead ends: 34 [2024-10-24 00:00:05,014 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2024-10-24 00:00:05,015 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:05,015 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 37 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:05,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-10-24 00:00:05,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2024-10-24 00:00:05,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:05,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-10-24 00:00:05,020 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 20 [2024-10-24 00:00:05,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:05,020 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-10-24 00:00:05,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:05,020 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-10-24 00:00:05,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-24 00:00:05,021 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:05,021 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:05,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-24 00:00:05,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:05,222 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:05,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:05,222 INFO L85 PathProgramCache]: Analyzing trace with hash -867557427, now seen corresponding path program 4 times [2024-10-24 00:00:05,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:05,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329883777] [2024-10-24 00:00:05,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:05,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:05,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:05,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329883777] [2024-10-24 00:00:05,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329883777] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:05,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671397596] [2024-10-24 00:00:05,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 00:00:05,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:05,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:05,552 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) [2024-10-24 00:00:05,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-24 00:00:05,596 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 00:00:05,596 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:05,596 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-24 00:00:05,598 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:05,884 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:06,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671397596] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:06,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:06,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2024-10-24 00:00:06,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659596082] [2024-10-24 00:00:06,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:06,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-24 00:00:06,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:06,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-24 00:00:06,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2024-10-24 00:00:06,134 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 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) [2024-10-24 00:00:06,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:06,252 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2024-10-24 00:00:06,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-24 00:00:06,252 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 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 21 [2024-10-24 00:00:06,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:06,253 INFO L225 Difference]: With dead ends: 46 [2024-10-24 00:00:06,253 INFO L226 Difference]: Without dead ends: 31 [2024-10-24 00:00:06,254 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2024-10-24 00:00:06,254 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:06,254 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 38 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:06,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-24 00:00:06,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-10-24 00:00:06,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 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) [2024-10-24 00:00:06,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2024-10-24 00:00:06,261 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 21 [2024-10-24 00:00:06,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:06,261 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2024-10-24 00:00:06,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 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) [2024-10-24 00:00:06,261 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2024-10-24 00:00:06,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-24 00:00:06,262 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:06,262 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:06,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-24 00:00:06,463 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,SelfDestructingSolverStorable13 [2024-10-24 00:00:06,464 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:06,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:06,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1725275500, now seen corresponding path program 4 times [2024-10-24 00:00:06,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:06,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949257025] [2024-10-24 00:00:06,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:06,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:06,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:06,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949257025] [2024-10-24 00:00:06,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949257025] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:06,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332400888] [2024-10-24 00:00:06,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 00:00:06,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:06,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:06,766 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) [2024-10-24 00:00:06,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-24 00:00:06,812 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 00:00:06,812 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:06,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-24 00:00:06,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:07,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:07,076 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:07,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:07,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332400888] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:07,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:07,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2024-10-24 00:00:07,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111594450] [2024-10-24 00:00:07,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:07,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-24 00:00:07,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:07,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-24 00:00:07,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2024-10-24 00:00:07,324 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:07,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:07,445 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2024-10-24 00:00:07,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 00:00:07,446 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-10-24 00:00:07,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:07,446 INFO L225 Difference]: With dead ends: 38 [2024-10-24 00:00:07,446 INFO L226 Difference]: Without dead ends: 32 [2024-10-24 00:00:07,447 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2024-10-24 00:00:07,448 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:07,448 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 40 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:07,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-24 00:00:07,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-10-24 00:00:07,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 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) [2024-10-24 00:00:07,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2024-10-24 00:00:07,454 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 21 [2024-10-24 00:00:07,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:07,456 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2024-10-24 00:00:07,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:07,456 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2024-10-24 00:00:07,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-24 00:00:07,456 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:07,457 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:07,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-24 00:00:07,657 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,SelfDestructingSolverStorable14 [2024-10-24 00:00:07,657 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:07,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:07,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1512776152, now seen corresponding path program 5 times [2024-10-24 00:00:07,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:07,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14496051] [2024-10-24 00:00:07,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:07,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:08,007 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:08,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:08,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14496051] [2024-10-24 00:00:08,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14496051] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:08,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439772325] [2024-10-24 00:00:08,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 00:00:08,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:08,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:08,010 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) [2024-10-24 00:00:08,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-24 00:00:08,054 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-24 00:00:08,054 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:08,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-24 00:00:08,056 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:08,407 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:08,407 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:08,682 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:08,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439772325] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:08,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:08,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2024-10-24 00:00:08,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490069626] [2024-10-24 00:00:08,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:08,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-24 00:00:08,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:08,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-24 00:00:08,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2024-10-24 00:00:08,684 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 36 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 36 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:08,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:08,898 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2024-10-24 00:00:08,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-24 00:00:08,898 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 36 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-24 00:00:08,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:08,900 INFO L225 Difference]: With dead ends: 50 [2024-10-24 00:00:08,900 INFO L226 Difference]: Without dead ends: 34 [2024-10-24 00:00:08,901 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2024-10-24 00:00:08,901 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:08,901 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 57 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:08,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-10-24 00:00:08,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-10-24 00:00:08,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:08,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2024-10-24 00:00:08,907 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 22 [2024-10-24 00:00:08,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:08,909 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2024-10-24 00:00:08,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 36 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:08,909 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2024-10-24 00:00:08,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-24 00:00:08,909 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:08,909 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:08,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-24 00:00:09,113 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,SelfDestructingSolverStorable15 [2024-10-24 00:00:09,114 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:09,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:09,114 INFO L85 PathProgramCache]: Analyzing trace with hash 499811860, now seen corresponding path program 5 times [2024-10-24 00:00:09,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:09,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792533964] [2024-10-24 00:00:09,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:09,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:09,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:09,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792533964] [2024-10-24 00:00:09,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792533964] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:09,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49160847] [2024-10-24 00:00:09,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 00:00:09,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:09,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:09,424 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) [2024-10-24 00:00:09,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-24 00:00:09,467 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-24 00:00:09,467 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:09,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-24 00:00:09,469 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:09,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:09,784 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:10,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49160847] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:10,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:10,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2024-10-24 00:00:10,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735687390] [2024-10-24 00:00:10,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:10,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-24 00:00:10,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:10,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-24 00:00:10,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2024-10-24 00:00:10,059 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:10,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:10,207 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2024-10-24 00:00:10,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-24 00:00:10,207 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-24 00:00:10,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:10,208 INFO L225 Difference]: With dead ends: 43 [2024-10-24 00:00:10,208 INFO L226 Difference]: Without dead ends: 37 [2024-10-24 00:00:10,208 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2024-10-24 00:00:10,209 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:10,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 46 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:10,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-24 00:00:10,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2024-10-24 00:00:10,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:10,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-10-24 00:00:10,214 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 22 [2024-10-24 00:00:10,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:10,214 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-10-24 00:00:10,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:10,214 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-10-24 00:00:10,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-24 00:00:10,215 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:10,215 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:10,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-24 00:00:10,416 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,SelfDestructingSolverStorable16 [2024-10-24 00:00:10,417 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:10,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:10,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1826418836, now seen corresponding path program 6 times [2024-10-24 00:00:10,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:10,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032127850] [2024-10-24 00:00:10,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:10,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:10,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:10,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032127850] [2024-10-24 00:00:10,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032127850] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:10,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947301479] [2024-10-24 00:00:10,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 00:00:10,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:10,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:10,720 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) [2024-10-24 00:00:10,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-24 00:00:10,759 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-24 00:00:10,759 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:10,760 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-24 00:00:10,765 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:11,048 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:11,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947301479] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:11,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:11,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2024-10-24 00:00:11,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907063878] [2024-10-24 00:00:11,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:11,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-24 00:00:11,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:11,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-24 00:00:11,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2024-10-24 00:00:11,236 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 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) [2024-10-24 00:00:11,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:11,399 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2024-10-24 00:00:11,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-24 00:00:11,400 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 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 23 [2024-10-24 00:00:11,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:11,401 INFO L225 Difference]: With dead ends: 50 [2024-10-24 00:00:11,401 INFO L226 Difference]: Without dead ends: 34 [2024-10-24 00:00:11,401 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2024-10-24 00:00:11,402 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:11,402 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 67 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:11,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-10-24 00:00:11,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-10-24 00:00:11,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 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) [2024-10-24 00:00:11,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2024-10-24 00:00:11,407 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2024-10-24 00:00:11,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:11,407 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2024-10-24 00:00:11,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 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) [2024-10-24 00:00:11,407 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2024-10-24 00:00:11,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-24 00:00:11,408 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:11,408 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:11,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-24 00:00:11,611 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,SelfDestructingSolverStorable17 [2024-10-24 00:00:11,612 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:11,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:11,612 INFO L85 PathProgramCache]: Analyzing trace with hash 951551089, now seen corresponding path program 6 times [2024-10-24 00:00:11,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:11,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308646413] [2024-10-24 00:00:11,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:11,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:11,943 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:11,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:11,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308646413] [2024-10-24 00:00:11,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308646413] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:11,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322125826] [2024-10-24 00:00:11,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 00:00:11,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:11,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:11,946 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) [2024-10-24 00:00:11,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-24 00:00:11,989 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-24 00:00:11,990 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:11,991 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-24 00:00:11,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:12,244 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:12,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322125826] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:12,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:12,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2024-10-24 00:00:12,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153877553] [2024-10-24 00:00:12,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:12,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-24 00:00:12,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:12,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-24 00:00:12,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2024-10-24 00:00:12,469 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:12,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:12,589 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2024-10-24 00:00:12,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-24 00:00:12,589 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-10-24 00:00:12,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:12,590 INFO L225 Difference]: With dead ends: 41 [2024-10-24 00:00:12,590 INFO L226 Difference]: Without dead ends: 35 [2024-10-24 00:00:12,590 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=251, Invalid=939, Unknown=0, NotChecked=0, Total=1190 [2024-10-24 00:00:12,591 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:12,591 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 42 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:12,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-24 00:00:12,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-10-24 00:00:12,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:12,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2024-10-24 00:00:12,596 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 23 [2024-10-24 00:00:12,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:12,597 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2024-10-24 00:00:12,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:12,597 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2024-10-24 00:00:12,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-24 00:00:12,598 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:12,598 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:12,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-24 00:00:12,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:12,799 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:12,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:12,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1404945509, now seen corresponding path program 7 times [2024-10-24 00:00:12,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:12,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927093814] [2024-10-24 00:00:12,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:12,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:13,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:13,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927093814] [2024-10-24 00:00:13,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927093814] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:13,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455357555] [2024-10-24 00:00:13,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-24 00:00:13,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:13,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:13,134 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) [2024-10-24 00:00:13,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-24 00:00:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:13,170 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-24 00:00:13,171 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:13,515 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:13,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455357555] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:13,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:13,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 41 [2024-10-24 00:00:13,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686735468] [2024-10-24 00:00:13,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:13,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-10-24 00:00:13,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:13,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-10-24 00:00:13,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1341, Unknown=0, NotChecked=0, Total=1640 [2024-10-24 00:00:13,813 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:14,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:14,036 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2024-10-24 00:00:14,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-24 00:00:14,037 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-10-24 00:00:14,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:14,037 INFO L225 Difference]: With dead ends: 54 [2024-10-24 00:00:14,037 INFO L226 Difference]: Without dead ends: 37 [2024-10-24 00:00:14,038 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2024-10-24 00:00:14,038 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:14,039 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 57 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:14,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-24 00:00:14,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-10-24 00:00:14,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 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) [2024-10-24 00:00:14,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2024-10-24 00:00:14,043 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 24 [2024-10-24 00:00:14,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:14,043 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2024-10-24 00:00:14,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:14,043 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2024-10-24 00:00:14,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-24 00:00:14,044 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:14,044 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:14,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-24 00:00:14,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:14,245 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:14,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:14,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1608311067, now seen corresponding path program 7 times [2024-10-24 00:00:14,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:14,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664387617] [2024-10-24 00:00:14,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:14,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:14,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:14,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664387617] [2024-10-24 00:00:14,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664387617] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:14,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604920952] [2024-10-24 00:00:14,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-24 00:00:14,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:14,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:14,612 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:00:14,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-24 00:00:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:14,647 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-24 00:00:14,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:14,999 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:15,272 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:15,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604920952] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:15,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:15,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 40 [2024-10-24 00:00:15,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106463549] [2024-10-24 00:00:15,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:15,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-24 00:00:15,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:15,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-24 00:00:15,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1265, Unknown=0, NotChecked=0, Total=1560 [2024-10-24 00:00:15,276 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 40 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:15,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:15,394 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2024-10-24 00:00:15,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-24 00:00:15,394 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-10-24 00:00:15,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:15,395 INFO L225 Difference]: With dead ends: 46 [2024-10-24 00:00:15,395 INFO L226 Difference]: Without dead ends: 40 [2024-10-24 00:00:15,395 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=318, Invalid=1322, Unknown=0, NotChecked=0, Total=1640 [2024-10-24 00:00:15,396 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:15,396 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 50 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:15,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-24 00:00:15,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2024-10-24 00:00:15,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:15,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2024-10-24 00:00:15,401 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 24 [2024-10-24 00:00:15,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:15,401 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2024-10-24 00:00:15,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:15,401 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2024-10-24 00:00:15,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-24 00:00:15,402 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:15,402 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:15,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-24 00:00:15,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:15,603 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:15,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:15,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1830155885, now seen corresponding path program 8 times [2024-10-24 00:00:15,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:15,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520423852] [2024-10-24 00:00:15,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:15,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:15,915 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:15,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:15,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520423852] [2024-10-24 00:00:15,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520423852] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:15,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434345536] [2024-10-24 00:00:15,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 00:00:15,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:15,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:15,918 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) [2024-10-24 00:00:15,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-24 00:00:15,957 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 00:00:15,958 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:15,958 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-24 00:00:15,959 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:16,252 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:16,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434345536] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:16,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:16,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 39 [2024-10-24 00:00:16,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354970582] [2024-10-24 00:00:16,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:16,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-24 00:00:16,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:16,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-24 00:00:16,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1189, Unknown=0, NotChecked=0, Total=1482 [2024-10-24 00:00:16,481 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 39 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:16,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:16,588 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2024-10-24 00:00:16,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-24 00:00:16,589 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-10-24 00:00:16,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:16,589 INFO L225 Difference]: With dead ends: 54 [2024-10-24 00:00:16,589 INFO L226 Difference]: Without dead ends: 37 [2024-10-24 00:00:16,590 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=308, Invalid=1252, Unknown=0, NotChecked=0, Total=1560 [2024-10-24 00:00:16,590 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:16,591 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 50 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:16,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-24 00:00:16,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-10-24 00:00:16,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:16,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2024-10-24 00:00:16,596 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 25 [2024-10-24 00:00:16,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:16,596 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2024-10-24 00:00:16,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:16,597 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2024-10-24 00:00:16,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-24 00:00:16,597 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:16,597 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:16,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-24 00:00:16,798 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,SelfDestructingSolverStorable21 [2024-10-24 00:00:16,798 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:16,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:16,798 INFO L85 PathProgramCache]: Analyzing trace with hash 423648244, now seen corresponding path program 8 times [2024-10-24 00:00:16,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:16,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987017405] [2024-10-24 00:00:16,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:16,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:16,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:17,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:17,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987017405] [2024-10-24 00:00:17,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987017405] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:17,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013484002] [2024-10-24 00:00:17,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 00:00:17,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:17,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:17,151 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) [2024-10-24 00:00:17,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-24 00:00:17,187 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 00:00:17,187 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:17,188 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-24 00:00:17,189 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:17,449 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:17,698 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:17,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013484002] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:17,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:17,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 39 [2024-10-24 00:00:17,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545042975] [2024-10-24 00:00:17,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:17,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-24 00:00:17,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:17,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-24 00:00:17,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1184, Unknown=0, NotChecked=0, Total=1482 [2024-10-24 00:00:17,700 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 39 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:17,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:17,821 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2024-10-24 00:00:17,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-24 00:00:17,821 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-10-24 00:00:17,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:17,822 INFO L225 Difference]: With dead ends: 44 [2024-10-24 00:00:17,822 INFO L226 Difference]: Without dead ends: 38 [2024-10-24 00:00:17,822 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=322, Invalid=1238, Unknown=0, NotChecked=0, Total=1560 [2024-10-24 00:00:17,823 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:17,823 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 55 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:17,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-24 00:00:17,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-10-24 00:00:17,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 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) [2024-10-24 00:00:17,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2024-10-24 00:00:17,828 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 25 [2024-10-24 00:00:17,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:17,828 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2024-10-24 00:00:17,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:17,829 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2024-10-24 00:00:17,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-24 00:00:17,829 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:17,829 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:17,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-24 00:00:18,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:18,030 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:18,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:18,030 INFO L85 PathProgramCache]: Analyzing trace with hash -590064520, now seen corresponding path program 9 times [2024-10-24 00:00:18,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:18,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893510210] [2024-10-24 00:00:18,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:18,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:18,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:18,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:18,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893510210] [2024-10-24 00:00:18,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893510210] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:18,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485466645] [2024-10-24 00:00:18,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 00:00:18,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:18,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:18,458 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:00:18,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-24 00:00:18,504 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-24 00:00:18,504 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:18,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-24 00:00:18,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:19,000 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:19,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485466645] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:19,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:19,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 46 [2024-10-24 00:00:19,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478882511] [2024-10-24 00:00:19,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:19,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-10-24 00:00:19,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:19,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-10-24 00:00:19,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=1696, Unknown=0, NotChecked=0, Total=2070 [2024-10-24 00:00:19,341 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 46 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 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) [2024-10-24 00:00:19,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:19,533 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2024-10-24 00:00:19,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 00:00:19,534 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 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 26 [2024-10-24 00:00:19,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:19,534 INFO L225 Difference]: With dead ends: 58 [2024-10-24 00:00:19,534 INFO L226 Difference]: Without dead ends: 40 [2024-10-24 00:00:19,535 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=400, Invalid=1856, Unknown=0, NotChecked=0, Total=2256 [2024-10-24 00:00:19,535 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:19,536 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 55 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:19,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-24 00:00:19,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-10-24 00:00:19,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:19,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2024-10-24 00:00:19,540 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 26 [2024-10-24 00:00:19,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:19,540 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2024-10-24 00:00:19,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 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) [2024-10-24 00:00:19,541 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2024-10-24 00:00:19,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-24 00:00:19,541 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:19,541 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:19,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-24 00:00:19,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:19,745 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:19,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:19,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1612979916, now seen corresponding path program 9 times [2024-10-24 00:00:19,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:19,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948924293] [2024-10-24 00:00:19,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:19,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:20,160 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:20,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:20,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948924293] [2024-10-24 00:00:20,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948924293] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:20,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684397194] [2024-10-24 00:00:20,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 00:00:20,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:20,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:20,164 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:00:20,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-24 00:00:20,212 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-24 00:00:20,212 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:20,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-24 00:00:20,214 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:20,679 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:20,679 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:20,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684397194] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:20,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:20,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 45 [2024-10-24 00:00:20,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116349919] [2024-10-24 00:00:20,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:20,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-10-24 00:00:20,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:20,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-10-24 00:00:20,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1609, Unknown=0, NotChecked=0, Total=1980 [2024-10-24 00:00:20,987 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 45 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 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) [2024-10-24 00:00:21,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:21,116 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2024-10-24 00:00:21,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 00:00:21,117 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 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 26 [2024-10-24 00:00:21,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:21,117 INFO L225 Difference]: With dead ends: 49 [2024-10-24 00:00:21,117 INFO L226 Difference]: Without dead ends: 43 [2024-10-24 00:00:21,118 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=397, Invalid=1673, Unknown=0, NotChecked=0, Total=2070 [2024-10-24 00:00:21,118 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:21,118 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 46 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:21,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-24 00:00:21,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2024-10-24 00:00:21,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:21,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2024-10-24 00:00:21,124 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 26 [2024-10-24 00:00:21,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:21,124 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2024-10-24 00:00:21,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 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) [2024-10-24 00:00:21,125 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2024-10-24 00:00:21,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-24 00:00:21,125 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:21,125 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:21,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-24 00:00:21,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:21,330 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:21,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:21,330 INFO L85 PathProgramCache]: Analyzing trace with hash 754383220, now seen corresponding path program 10 times [2024-10-24 00:00:21,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:21,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300343133] [2024-10-24 00:00:21,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:21,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:21,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:21,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300343133] [2024-10-24 00:00:21,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300343133] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:21,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602785238] [2024-10-24 00:00:21,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 00:00:21,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:21,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:21,702 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:00:21,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-24 00:00:21,740 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 00:00:21,740 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:21,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-24 00:00:21,741 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:22,145 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:22,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602785238] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:22,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:22,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 44 [2024-10-24 00:00:22,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161913538] [2024-10-24 00:00:22,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:22,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-24 00:00:22,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:22,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-24 00:00:22,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1523, Unknown=0, NotChecked=0, Total=1892 [2024-10-24 00:00:22,468 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 44 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 44 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:22,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:22,618 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2024-10-24 00:00:22,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 00:00:22,619 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 44 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-10-24 00:00:22,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:22,620 INFO L225 Difference]: With dead ends: 58 [2024-10-24 00:00:22,620 INFO L226 Difference]: Without dead ends: 40 [2024-10-24 00:00:22,620 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=385, Invalid=1595, Unknown=0, NotChecked=0, Total=1980 [2024-10-24 00:00:22,621 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:22,621 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:22,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-24 00:00:22,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-10-24 00:00:22,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:22,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2024-10-24 00:00:22,627 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 27 [2024-10-24 00:00:22,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:22,627 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2024-10-24 00:00:22,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 44 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:22,628 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2024-10-24 00:00:22,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-24 00:00:22,628 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:22,628 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:22,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-24 00:00:22,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-24 00:00:22,829 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:22,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:22,829 INFO L85 PathProgramCache]: Analyzing trace with hash 46908049, now seen corresponding path program 10 times [2024-10-24 00:00:22,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:22,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546548276] [2024-10-24 00:00:22,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:22,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:23,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:23,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546548276] [2024-10-24 00:00:23,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546548276] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:23,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413867676] [2024-10-24 00:00:23,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 00:00:23,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:23,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:23,215 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:00:23,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-24 00:00:23,255 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 00:00:23,255 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:23,256 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-24 00:00:23,257 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:23,583 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:23,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413867676] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:23,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:23,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 44 [2024-10-24 00:00:23,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363662120] [2024-10-24 00:00:23,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:23,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-24 00:00:23,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:23,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-24 00:00:23,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1517, Unknown=0, NotChecked=0, Total=1892 [2024-10-24 00:00:23,922 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 44 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 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) [2024-10-24 00:00:24,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:24,078 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2024-10-24 00:00:24,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-24 00:00:24,078 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 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 27 [2024-10-24 00:00:24,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:24,079 INFO L225 Difference]: With dead ends: 47 [2024-10-24 00:00:24,079 INFO L226 Difference]: Without dead ends: 41 [2024-10-24 00:00:24,079 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=402, Invalid=1578, Unknown=0, NotChecked=0, Total=1980 [2024-10-24 00:00:24,080 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:24,080 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 49 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:24,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-24 00:00:24,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-10-24 00:00:24,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:24,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2024-10-24 00:00:24,085 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 27 [2024-10-24 00:00:24,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:24,086 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2024-10-24 00:00:24,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 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) [2024-10-24 00:00:24,086 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2024-10-24 00:00:24,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-24 00:00:24,086 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:24,086 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:24,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-10-24 00:00:24,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-24 00:00:24,287 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:24,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:24,287 INFO L85 PathProgramCache]: Analyzing trace with hash 615891323, now seen corresponding path program 11 times [2024-10-24 00:00:24,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:24,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245083569] [2024-10-24 00:00:24,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:24,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:24,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:24,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245083569] [2024-10-24 00:00:24,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245083569] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:24,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878524428] [2024-10-24 00:00:24,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 00:00:24,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:24,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:24,698 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:00:24,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-24 00:00:24,741 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-24 00:00:24,741 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:24,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-24 00:00:24,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:25,227 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:25,227 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:25,611 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:25,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878524428] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:25,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:25,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 51 [2024-10-24 00:00:25,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48977822] [2024-10-24 00:00:25,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:25,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-10-24 00:00:25,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:25,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-10-24 00:00:25,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=2092, Unknown=0, NotChecked=0, Total=2550 [2024-10-24 00:00:25,613 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 51 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:25,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:25,824 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2024-10-24 00:00:25,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-24 00:00:25,825 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-10-24 00:00:25,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:25,825 INFO L225 Difference]: With dead ends: 62 [2024-10-24 00:00:25,825 INFO L226 Difference]: Without dead ends: 43 [2024-10-24 00:00:25,826 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=485, Invalid=2271, Unknown=0, NotChecked=0, Total=2756 [2024-10-24 00:00:25,827 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:25,827 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 60 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:25,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-24 00:00:25,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-10-24 00:00:25,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:25,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2024-10-24 00:00:25,833 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 28 [2024-10-24 00:00:25,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:25,833 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2024-10-24 00:00:25,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:25,833 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2024-10-24 00:00:25,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-24 00:00:25,833 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:25,833 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:25,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-10-24 00:00:26,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-24 00:00:26,034 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:26,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:26,035 INFO L85 PathProgramCache]: Analyzing trace with hash -974303621, now seen corresponding path program 11 times [2024-10-24 00:00:26,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:26,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600616964] [2024-10-24 00:00:26,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:26,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:26,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:26,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600616964] [2024-10-24 00:00:26,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600616964] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:26,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537486727] [2024-10-24 00:00:26,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 00:00:26,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:26,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:26,432 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:00:26,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-24 00:00:26,469 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-24 00:00:26,469 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:26,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-24 00:00:26,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:26,877 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:27,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537486727] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:27,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:27,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 50 [2024-10-24 00:00:27,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797779917] [2024-10-24 00:00:27,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:27,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-10-24 00:00:27,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:27,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-10-24 00:00:27,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=1994, Unknown=0, NotChecked=0, Total=2450 [2024-10-24 00:00:27,223 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 50 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:27,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:27,350 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2024-10-24 00:00:27,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-24 00:00:27,350 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-10-24 00:00:27,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:27,351 INFO L225 Difference]: With dead ends: 52 [2024-10-24 00:00:27,351 INFO L226 Difference]: Without dead ends: 46 [2024-10-24 00:00:27,352 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=485, Invalid=2065, Unknown=0, NotChecked=0, Total=2550 [2024-10-24 00:00:27,352 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:27,352 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 44 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:27,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-24 00:00:27,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2024-10-24 00:00:27,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:27,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2024-10-24 00:00:27,359 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 28 [2024-10-24 00:00:27,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:27,359 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2024-10-24 00:00:27,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:27,359 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2024-10-24 00:00:27,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-24 00:00:27,359 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:27,359 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:27,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-10-24 00:00:27,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:27,560 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:27,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:27,561 INFO L85 PathProgramCache]: Analyzing trace with hash -921488115, now seen corresponding path program 12 times [2024-10-24 00:00:27,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:27,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369302707] [2024-10-24 00:00:27,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:27,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:27,956 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:27,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:27,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369302707] [2024-10-24 00:00:27,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369302707] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:27,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881474414] [2024-10-24 00:00:27,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 00:00:27,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:27,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:27,958 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:00:27,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-24 00:00:28,001 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-24 00:00:28,002 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:28,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-24 00:00:28,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:28,488 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:28,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881474414] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:28,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:28,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 49 [2024-10-24 00:00:28,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550967380] [2024-10-24 00:00:28,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:28,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-24 00:00:28,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:28,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-24 00:00:28,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=1898, Unknown=0, NotChecked=0, Total=2352 [2024-10-24 00:00:28,847 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:28,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:28,966 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2024-10-24 00:00:28,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-24 00:00:28,967 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-10-24 00:00:28,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:28,967 INFO L225 Difference]: With dead ends: 62 [2024-10-24 00:00:28,967 INFO L226 Difference]: Without dead ends: 43 [2024-10-24 00:00:28,968 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=471, Invalid=1979, Unknown=0, NotChecked=0, Total=2450 [2024-10-24 00:00:28,969 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:28,969 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 41 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:28,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-24 00:00:28,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-10-24 00:00:28,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 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) [2024-10-24 00:00:28,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2024-10-24 00:00:28,973 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 29 [2024-10-24 00:00:28,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:28,973 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2024-10-24 00:00:28,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:28,974 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2024-10-24 00:00:28,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-24 00:00:28,974 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:28,974 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:28,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-10-24 00:00:29,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:29,175 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:29,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:29,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1433793196, now seen corresponding path program 12 times [2024-10-24 00:00:29,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:29,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46924168] [2024-10-24 00:00:29,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:29,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:29,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:29,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46924168] [2024-10-24 00:00:29,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46924168] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:29,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912165300] [2024-10-24 00:00:29,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 00:00:29,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:29,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:29,598 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:00:29,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-24 00:00:29,645 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-24 00:00:29,645 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:29,647 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-24 00:00:29,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:30,085 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:30,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912165300] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:30,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:30,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 49 [2024-10-24 00:00:30,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565542321] [2024-10-24 00:00:30,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:30,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-24 00:00:30,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:30,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-24 00:00:30,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1891, Unknown=0, NotChecked=0, Total=2352 [2024-10-24 00:00:30,491 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 49 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:30,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:30,652 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2024-10-24 00:00:30,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-24 00:00:30,652 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-10-24 00:00:30,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:30,653 INFO L225 Difference]: With dead ends: 50 [2024-10-24 00:00:30,653 INFO L226 Difference]: Without dead ends: 44 [2024-10-24 00:00:30,653 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=491, Invalid=1959, Unknown=0, NotChecked=0, Total=2450 [2024-10-24 00:00:30,654 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:30,654 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 54 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:30,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-24 00:00:30,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-10-24 00:00:30,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:30,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2024-10-24 00:00:30,659 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 29 [2024-10-24 00:00:30,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:30,660 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2024-10-24 00:00:30,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:30,660 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2024-10-24 00:00:30,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-24 00:00:30,660 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:30,660 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:30,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-24 00:00:30,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-10-24 00:00:30,865 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:30,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:30,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1958792984, now seen corresponding path program 13 times [2024-10-24 00:00:30,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:30,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553952028] [2024-10-24 00:00:30,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:30,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:30,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:31,284 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:31,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:31,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553952028] [2024-10-24 00:00:31,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553952028] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:31,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504123967] [2024-10-24 00:00:31,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-24 00:00:31,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:31,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:31,286 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:00:31,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-24 00:00:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:31,324 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-24 00:00:31,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:31,887 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:32,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504123967] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:32,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:32,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 56 [2024-10-24 00:00:32,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609032673] [2024-10-24 00:00:32,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:32,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-10-24 00:00:32,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:32,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-10-24 00:00:32,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=2529, Unknown=0, NotChecked=0, Total=3080 [2024-10-24 00:00:32,373 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 56 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 56 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) [2024-10-24 00:00:32,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:32,560 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2024-10-24 00:00:32,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-24 00:00:32,561 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 56 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 30 [2024-10-24 00:00:32,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:32,561 INFO L225 Difference]: With dead ends: 66 [2024-10-24 00:00:32,561 INFO L226 Difference]: Without dead ends: 46 [2024-10-24 00:00:32,562 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1981 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=579, Invalid=2727, Unknown=0, NotChecked=0, Total=3306 [2024-10-24 00:00:32,562 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:32,562 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 38 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:32,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-24 00:00:32,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-10-24 00:00:32,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:32,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2024-10-24 00:00:32,570 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 30 [2024-10-24 00:00:32,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:32,570 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2024-10-24 00:00:32,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 56 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) [2024-10-24 00:00:32,570 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2024-10-24 00:00:32,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-24 00:00:32,571 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:32,571 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:32,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-10-24 00:00:32,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-10-24 00:00:32,772 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:32,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:32,772 INFO L85 PathProgramCache]: Analyzing trace with hash -37198764, now seen corresponding path program 13 times [2024-10-24 00:00:32,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:32,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025759006] [2024-10-24 00:00:32,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:32,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:33,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:33,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025759006] [2024-10-24 00:00:33,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025759006] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:33,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638839476] [2024-10-24 00:00:33,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-24 00:00:33,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:33,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:33,221 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:00:33,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-24 00:00:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:33,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-24 00:00:33,263 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:33,810 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:34,227 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:34,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638839476] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:34,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:34,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 55 [2024-10-24 00:00:34,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795227029] [2024-10-24 00:00:34,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:34,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-10-24 00:00:34,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:34,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-10-24 00:00:34,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=2420, Unknown=0, NotChecked=0, Total=2970 [2024-10-24 00:00:34,229 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 55 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 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) [2024-10-24 00:00:34,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:34,358 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2024-10-24 00:00:34,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-24 00:00:34,358 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 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 30 [2024-10-24 00:00:34,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:34,359 INFO L225 Difference]: With dead ends: 55 [2024-10-24 00:00:34,359 INFO L226 Difference]: Without dead ends: 49 [2024-10-24 00:00:34,359 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=582, Invalid=2498, Unknown=0, NotChecked=0, Total=3080 [2024-10-24 00:00:34,360 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:34,360 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 42 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:34,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-24 00:00:34,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2024-10-24 00:00:34,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:34,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2024-10-24 00:00:34,365 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 30 [2024-10-24 00:00:34,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:34,365 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2024-10-24 00:00:34,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 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) [2024-10-24 00:00:34,365 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2024-10-24 00:00:34,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-24 00:00:34,366 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:34,366 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:34,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-10-24 00:00:34,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:34,570 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:34,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:34,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1936008620, now seen corresponding path program 14 times [2024-10-24 00:00:34,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:34,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953089536] [2024-10-24 00:00:34,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:34,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:34,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:34,990 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:34,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:34,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953089536] [2024-10-24 00:00:34,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953089536] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:34,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802268643] [2024-10-24 00:00:34,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 00:00:34,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:34,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:34,992 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:00:34,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-24 00:00:35,031 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 00:00:35,031 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:35,032 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-24 00:00:35,033 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:35,510 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:35,898 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:35,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802268643] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:35,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:35,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 54 [2024-10-24 00:00:35,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046943295] [2024-10-24 00:00:35,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:35,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-10-24 00:00:35,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:35,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-10-24 00:00:35,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=2314, Unknown=0, NotChecked=0, Total=2862 [2024-10-24 00:00:35,900 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 54 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 54 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:36,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:36,067 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2024-10-24 00:00:36,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-24 00:00:36,067 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 54 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-10-24 00:00:36,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:36,067 INFO L225 Difference]: With dead ends: 66 [2024-10-24 00:00:36,067 INFO L226 Difference]: Without dead ends: 46 [2024-10-24 00:00:36,068 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 8 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1823 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=566, Invalid=2404, Unknown=0, NotChecked=0, Total=2970 [2024-10-24 00:00:36,068 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:36,069 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 71 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:36,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-24 00:00:36,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-10-24 00:00:36,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:36,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2024-10-24 00:00:36,074 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 31 [2024-10-24 00:00:36,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:36,074 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2024-10-24 00:00:36,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 54 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:36,075 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2024-10-24 00:00:36,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-24 00:00:36,075 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:36,075 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:36,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-10-24 00:00:36,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:36,276 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:36,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:36,276 INFO L85 PathProgramCache]: Analyzing trace with hash -693008207, now seen corresponding path program 14 times [2024-10-24 00:00:36,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:36,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485297508] [2024-10-24 00:00:36,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:36,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:36,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:36,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485297508] [2024-10-24 00:00:36,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485297508] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:36,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335308941] [2024-10-24 00:00:36,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 00:00:36,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:36,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:36,709 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:00:36,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-10-24 00:00:36,747 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 00:00:36,747 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:36,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-24 00:00:36,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:37,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:37,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335308941] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:37,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:37,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 54 [2024-10-24 00:00:37,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236426161] [2024-10-24 00:00:37,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:37,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-10-24 00:00:37,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:37,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-10-24 00:00:37,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=2306, Unknown=0, NotChecked=0, Total=2862 [2024-10-24 00:00:37,552 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 54 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 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) [2024-10-24 00:00:37,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:37,686 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2024-10-24 00:00:37,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-24 00:00:37,687 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 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 31 [2024-10-24 00:00:37,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:37,688 INFO L225 Difference]: With dead ends: 53 [2024-10-24 00:00:37,688 INFO L226 Difference]: Without dead ends: 47 [2024-10-24 00:00:37,689 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 23 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1873 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=589, Invalid=2381, Unknown=0, NotChecked=0, Total=2970 [2024-10-24 00:00:37,689 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:37,689 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 41 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:37,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-24 00:00:37,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-10-24 00:00:37,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:37,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2024-10-24 00:00:37,697 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 31 [2024-10-24 00:00:37,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:37,697 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2024-10-24 00:00:37,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 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) [2024-10-24 00:00:37,698 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2024-10-24 00:00:37,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-24 00:00:37,698 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:37,698 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:37,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-10-24 00:00:37,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:37,899 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:37,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:37,899 INFO L85 PathProgramCache]: Analyzing trace with hash -846676133, now seen corresponding path program 15 times [2024-10-24 00:00:37,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:37,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374234116] [2024-10-24 00:00:37,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:37,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 36 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:38,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:38,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374234116] [2024-10-24 00:00:38,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374234116] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:38,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596766699] [2024-10-24 00:00:38,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 00:00:38,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:38,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:38,406 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:00:38,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-10-24 00:00:38,446 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-24 00:00:38,446 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:38,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-24 00:00:38,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:39,001 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:39,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:39,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596766699] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:39,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:39,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 61 [2024-10-24 00:00:39,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038514466] [2024-10-24 00:00:39,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:39,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-10-24 00:00:39,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:39,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-10-24 00:00:39,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=3007, Unknown=0, NotChecked=0, Total=3660 [2024-10-24 00:00:39,480 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:39,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:39,788 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2024-10-24 00:00:39,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-24 00:00:39,789 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-10-24 00:00:39,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:39,789 INFO L225 Difference]: With dead ends: 70 [2024-10-24 00:00:39,789 INFO L226 Difference]: Without dead ends: 49 [2024-10-24 00:00:39,789 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 10 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2396 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=682, Invalid=3224, Unknown=0, NotChecked=0, Total=3906 [2024-10-24 00:00:39,790 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:39,790 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 80 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 00:00:39,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-24 00:00:39,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-10-24 00:00:39,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:39,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2024-10-24 00:00:39,798 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 32 [2024-10-24 00:00:39,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:39,798 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2024-10-24 00:00:39,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:39,798 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2024-10-24 00:00:39,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-24 00:00:39,798 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:39,798 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:39,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-10-24 00:00:39,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-10-24 00:00:39,999 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:39,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:40,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1757500379, now seen corresponding path program 15 times [2024-10-24 00:00:40,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:40,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232405681] [2024-10-24 00:00:40,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:40,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 36 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:40,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:40,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232405681] [2024-10-24 00:00:40,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232405681] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:40,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270789120] [2024-10-24 00:00:40,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 00:00:40,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:40,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:40,478 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:00:40,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-10-24 00:00:40,518 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-24 00:00:40,518 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:40,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-24 00:00:40,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:41,047 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:41,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270789120] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:41,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:41,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 60 [2024-10-24 00:00:41,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789664254] [2024-10-24 00:00:41,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:41,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-10-24 00:00:41,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:41,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-10-24 00:00:41,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=2887, Unknown=0, NotChecked=0, Total=3540 [2024-10-24 00:00:41,500 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 60 states, 60 states have (on average 1.2) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:41,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:41,620 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2024-10-24 00:00:41,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-24 00:00:41,620 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.2) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-10-24 00:00:41,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:41,621 INFO L225 Difference]: With dead ends: 58 [2024-10-24 00:00:41,621 INFO L226 Difference]: Without dead ends: 52 [2024-10-24 00:00:41,621 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 10 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2296 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=688, Invalid=2972, Unknown=0, NotChecked=0, Total=3660 [2024-10-24 00:00:41,622 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:41,622 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 41 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:41,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-10-24 00:00:41,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2024-10-24 00:00:41,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 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) [2024-10-24 00:00:41,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2024-10-24 00:00:41,628 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 32 [2024-10-24 00:00:41,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:41,628 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2024-10-24 00:00:41,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.2) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:41,628 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2024-10-24 00:00:41,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-24 00:00:41,628 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:41,628 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:41,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-10-24 00:00:41,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-10-24 00:00:41,829 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:41,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:41,830 INFO L85 PathProgramCache]: Analyzing trace with hash -2134910035, now seen corresponding path program 16 times [2024-10-24 00:00:41,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:41,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230880345] [2024-10-24 00:00:41,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:41,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:42,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:42,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230880345] [2024-10-24 00:00:42,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230880345] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:42,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612983370] [2024-10-24 00:00:42,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 00:00:42,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:42,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:42,308 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:00:42,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-10-24 00:00:42,349 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 00:00:42,349 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:42,350 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-24 00:00:42,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:42,883 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:43,306 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:43,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612983370] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:43,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:43,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 59 [2024-10-24 00:00:43,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575707736] [2024-10-24 00:00:43,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:43,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-10-24 00:00:43,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:43,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-10-24 00:00:43,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2771, Unknown=0, NotChecked=0, Total=3422 [2024-10-24 00:00:43,308 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 59 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 59 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) [2024-10-24 00:00:43,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:43,438 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2024-10-24 00:00:43,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-24 00:00:43,439 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 59 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) Word has length 33 [2024-10-24 00:00:43,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:43,439 INFO L225 Difference]: With dead ends: 70 [2024-10-24 00:00:43,439 INFO L226 Difference]: Without dead ends: 49 [2024-10-24 00:00:43,440 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 9 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2221 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=670, Invalid=2870, Unknown=0, NotChecked=0, Total=3540 [2024-10-24 00:00:43,440 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:43,440 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:43,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-24 00:00:43,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-10-24 00:00:43,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:43,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2024-10-24 00:00:43,447 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 33 [2024-10-24 00:00:43,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:43,447 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2024-10-24 00:00:43,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 59 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) [2024-10-24 00:00:43,447 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2024-10-24 00:00:43,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-24 00:00:43,448 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:43,448 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:43,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-10-24 00:00:43,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-10-24 00:00:43,648 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:43,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:43,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1982953140, now seen corresponding path program 16 times [2024-10-24 00:00:43,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:43,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974329369] [2024-10-24 00:00:43,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:43,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:44,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:44,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974329369] [2024-10-24 00:00:44,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974329369] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:44,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259765970] [2024-10-24 00:00:44,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 00:00:44,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:44,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:44,110 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:00:44,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-10-24 00:00:44,156 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 00:00:44,157 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:44,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-24 00:00:44,159 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:44,636 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:45,103 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:45,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259765970] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:45,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:45,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 59 [2024-10-24 00:00:45,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425674640] [2024-10-24 00:00:45,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:45,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-10-24 00:00:45,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:45,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-10-24 00:00:45,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=2762, Unknown=0, NotChecked=0, Total=3422 [2024-10-24 00:00:45,105 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 59 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:45,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:45,295 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2024-10-24 00:00:45,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-24 00:00:45,295 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-10-24 00:00:45,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:45,296 INFO L225 Difference]: With dead ends: 56 [2024-10-24 00:00:45,296 INFO L226 Difference]: Without dead ends: 50 [2024-10-24 00:00:45,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 23 SyntacticMatches, 10 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2276 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=696, Invalid=2844, Unknown=0, NotChecked=0, Total=3540 [2024-10-24 00:00:45,297 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:45,297 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 49 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 00:00:45,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-24 00:00:45,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-10-24 00:00:45,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2024-10-24 00:00:45,306 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 33 [2024-10-24 00:00:45,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:45,306 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2024-10-24 00:00:45,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:45,307 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2024-10-24 00:00:45,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-24 00:00:45,307 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:45,307 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:45,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-10-24 00:00:45,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-10-24 00:00:45,512 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:45,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:45,512 INFO L85 PathProgramCache]: Analyzing trace with hash 503747000, now seen corresponding path program 17 times [2024-10-24 00:00:45,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:45,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082942611] [2024-10-24 00:00:45,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:45,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:46,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:46,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082942611] [2024-10-24 00:00:46,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082942611] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:46,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746810078] [2024-10-24 00:00:46,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 00:00:46,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:46,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:46,020 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:00:46,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-10-24 00:00:46,061 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-24 00:00:46,061 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:46,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-24 00:00:46,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:46,696 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:47,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746810078] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:47,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:47,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 66 [2024-10-24 00:00:47,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270713216] [2024-10-24 00:00:47,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:47,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-10-24 00:00:47,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:47,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-10-24 00:00:47,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=764, Invalid=3526, Unknown=0, NotChecked=0, Total=4290 [2024-10-24 00:00:47,235 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 66 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 66 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:47,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:47,430 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2024-10-24 00:00:47,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-24 00:00:47,430 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 66 states have internal predecessors, (77), 0 states have call successors, (0), 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 [2024-10-24 00:00:47,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:47,431 INFO L225 Difference]: With dead ends: 74 [2024-10-24 00:00:47,431 INFO L226 Difference]: Without dead ends: 52 [2024-10-24 00:00:47,431 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 12 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2885 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=794, Invalid=3762, Unknown=0, NotChecked=0, Total=4556 [2024-10-24 00:00:47,432 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:47,432 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 43 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:47,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-10-24 00:00:47,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-10-24 00:00:47,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:47,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2024-10-24 00:00:47,438 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 34 [2024-10-24 00:00:47,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:47,439 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2024-10-24 00:00:47,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 66 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:47,439 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2024-10-24 00:00:47,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-24 00:00:47,439 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:47,439 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:47,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-10-24 00:00:47,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-10-24 00:00:47,640 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:47,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:47,640 INFO L85 PathProgramCache]: Analyzing trace with hash -315748492, now seen corresponding path program 17 times [2024-10-24 00:00:47,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:47,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288847561] [2024-10-24 00:00:47,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:47,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:48,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:48,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288847561] [2024-10-24 00:00:48,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288847561] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:48,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808908180] [2024-10-24 00:00:48,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 00:00:48,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:48,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:48,193 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:00:48,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-10-24 00:00:48,238 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-24 00:00:48,238 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:48,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-24 00:00:48,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:48,805 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:49,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808908180] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:49,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:49,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 65 [2024-10-24 00:00:49,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949051643] [2024-10-24 00:00:49,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:49,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-10-24 00:00:49,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:49,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-10-24 00:00:49,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=3395, Unknown=0, NotChecked=0, Total=4160 [2024-10-24 00:00:49,307 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 65 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 65 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:49,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:49,450 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2024-10-24 00:00:49,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-24 00:00:49,450 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 65 states have internal predecessors, (77), 0 states have call successors, (0), 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 [2024-10-24 00:00:49,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:49,451 INFO L225 Difference]: With dead ends: 61 [2024-10-24 00:00:49,451 INFO L226 Difference]: Without dead ends: 55 [2024-10-24 00:00:49,451 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 11 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2740 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=803, Invalid=3487, Unknown=0, NotChecked=0, Total=4290 [2024-10-24 00:00:49,451 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:49,451 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 43 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:49,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-24 00:00:49,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2024-10-24 00:00:49,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 52 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) [2024-10-24 00:00:49,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2024-10-24 00:00:49,460 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 34 [2024-10-24 00:00:49,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:49,460 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2024-10-24 00:00:49,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 65 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:49,461 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2024-10-24 00:00:49,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-24 00:00:49,461 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:49,461 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:49,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-10-24 00:00:49,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:49,662 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:49,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:49,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1981115596, now seen corresponding path program 18 times [2024-10-24 00:00:49,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:49,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772623901] [2024-10-24 00:00:49,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:49,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:50,121 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:50,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:50,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772623901] [2024-10-24 00:00:50,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772623901] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:50,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805731821] [2024-10-24 00:00:50,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 00:00:50,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:50,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:50,123 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:00:50,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-10-24 00:00:50,165 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-10-24 00:00:50,165 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:50,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-24 00:00:50,166 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:50,736 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:51,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805731821] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:51,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:51,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 64 [2024-10-24 00:00:51,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11202921] [2024-10-24 00:00:51,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:51,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-10-24 00:00:51,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:51,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-10-24 00:00:51,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=3269, Unknown=0, NotChecked=0, Total=4032 [2024-10-24 00:00:51,215 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 64 states, 64 states have (on average 1.1875) internal successors, (76), 64 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:51,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:51,428 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2024-10-24 00:00:51,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-24 00:00:51,428 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.1875) internal successors, (76), 64 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-10-24 00:00:51,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:51,429 INFO L225 Difference]: With dead ends: 74 [2024-10-24 00:00:51,429 INFO L226 Difference]: Without dead ends: 52 [2024-10-24 00:00:51,430 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 23 SyntacticMatches, 11 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2694 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=783, Invalid=3377, Unknown=0, NotChecked=0, Total=4160 [2024-10-24 00:00:51,430 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:51,430 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 74 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 00:00:51,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-10-24 00:00:51,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-10-24 00:00:51,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:51,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2024-10-24 00:00:51,443 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 35 [2024-10-24 00:00:51,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:51,444 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2024-10-24 00:00:51,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.1875) internal successors, (76), 64 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:51,444 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2024-10-24 00:00:51,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-24 00:00:51,445 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:51,445 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:51,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-10-24 00:00:51,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:51,646 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:51,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:51,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1063179985, now seen corresponding path program 18 times [2024-10-24 00:00:51,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:51,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569776723] [2024-10-24 00:00:51,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:51,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:52,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:52,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569776723] [2024-10-24 00:00:52,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569776723] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:52,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770882484] [2024-10-24 00:00:52,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 00:00:52,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:52,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:52,236 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:00:52,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-10-24 00:00:52,278 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-10-24 00:00:52,279 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:52,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-24 00:00:52,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:52,806 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:53,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770882484] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:53,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:53,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 64 [2024-10-24 00:00:53,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016637892] [2024-10-24 00:00:53,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:53,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-10-24 00:00:53,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:53,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-10-24 00:00:53,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=3259, Unknown=0, NotChecked=0, Total=4032 [2024-10-24 00:00:53,304 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 64 states, 64 states have (on average 1.203125) internal successors, (77), 64 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:53,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:53,426 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2024-10-24 00:00:53,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-24 00:00:53,427 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.203125) internal successors, (77), 64 states have internal predecessors, (77), 0 states have call successors, (0), 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 [2024-10-24 00:00:53,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:53,427 INFO L225 Difference]: With dead ends: 59 [2024-10-24 00:00:53,427 INFO L226 Difference]: Without dead ends: 53 [2024-10-24 00:00:53,428 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 23 SyntacticMatches, 11 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2718 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=812, Invalid=3348, Unknown=0, NotChecked=0, Total=4160 [2024-10-24 00:00:53,428 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:53,428 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 38 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:00:53,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-24 00:00:53,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-10-24 00:00:53,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:53,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2024-10-24 00:00:53,439 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 35 [2024-10-24 00:00:53,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:53,440 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2024-10-24 00:00:53,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.203125) internal successors, (77), 64 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:53,440 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2024-10-24 00:00:53,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-24 00:00:53,441 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:53,441 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:53,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-10-24 00:00:53,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:53,642 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:53,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:53,642 INFO L85 PathProgramCache]: Analyzing trace with hash 2055550267, now seen corresponding path program 19 times [2024-10-24 00:00:53,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:53,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674431079] [2024-10-24 00:00:53,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:53,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:53,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:54,224 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 55 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:54,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:54,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674431079] [2024-10-24 00:00:54,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674431079] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:54,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771763683] [2024-10-24 00:00:54,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-24 00:00:54,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:54,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:54,226 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:00:54,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-10-24 00:00:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:54,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-24 00:00:54,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:55,016 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:55,016 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:55,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771763683] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:55,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:55,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 71 [2024-10-24 00:00:55,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321136468] [2024-10-24 00:00:55,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:55,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-10-24 00:00:55,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:55,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-10-24 00:00:55,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=884, Invalid=4086, Unknown=0, NotChecked=0, Total=4970 [2024-10-24 00:00:55,618 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 71 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:55,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:55,881 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2024-10-24 00:00:55,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-24 00:00:55,882 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-10-24 00:00:55,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:55,882 INFO L225 Difference]: With dead ends: 78 [2024-10-24 00:00:55,882 INFO L226 Difference]: Without dead ends: 55 [2024-10-24 00:00:55,883 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 13 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3381 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=915, Invalid=4341, Unknown=0, NotChecked=0, Total=5256 [2024-10-24 00:00:55,883 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:55,883 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 67 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 00:00:55,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-24 00:00:55,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-10-24 00:00:55,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 54 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:55,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2024-10-24 00:00:55,891 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 36 [2024-10-24 00:00:55,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:55,891 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2024-10-24 00:00:55,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:55,891 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2024-10-24 00:00:55,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-24 00:00:55,891 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:55,892 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:55,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-10-24 00:00:56,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-10-24 00:00:56,092 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:56,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:56,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1818562245, now seen corresponding path program 19 times [2024-10-24 00:00:56,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:56,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461643350] [2024-10-24 00:00:56,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:56,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:56,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:56,686 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 55 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:56,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:56,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461643350] [2024-10-24 00:00:56,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461643350] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:56,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282446159] [2024-10-24 00:00:56,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-24 00:00:56,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:56,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:56,690 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:00:56,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-10-24 00:00:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:56,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-24 00:00:56,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:57,365 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:00:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:57,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282446159] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:00:57,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:00:57,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 70 [2024-10-24 00:00:57,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337330523] [2024-10-24 00:00:57,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:00:57,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-10-24 00:00:57,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:00:57,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-10-24 00:00:57,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=886, Invalid=3944, Unknown=0, NotChecked=0, Total=4830 [2024-10-24 00:00:57,926 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 70 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:58,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:00:58,137 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2024-10-24 00:00:58,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-24 00:00:58,138 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-10-24 00:00:58,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:00:58,138 INFO L225 Difference]: With dead ends: 64 [2024-10-24 00:00:58,138 INFO L226 Difference]: Without dead ends: 58 [2024-10-24 00:00:58,139 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 12 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3223 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=927, Invalid=4043, Unknown=0, NotChecked=0, Total=4970 [2024-10-24 00:00:58,139 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 00:00:58,139 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 72 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 00:00:58,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-24 00:00:58,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2024-10-24 00:00:58,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:58,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2024-10-24 00:00:58,147 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 36 [2024-10-24 00:00:58,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:00:58,148 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2024-10-24 00:00:58,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:00:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2024-10-24 00:00:58,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-24 00:00:58,148 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:00:58,148 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:00:58,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-10-24 00:00:58,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-10-24 00:00:58,349 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:00:58,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:00:58,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1323701683, now seen corresponding path program 20 times [2024-10-24 00:00:58,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:00:58,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766681393] [2024-10-24 00:00:58,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:00:58,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:00:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:00:58,912 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 67 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:58,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:00:58,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766681393] [2024-10-24 00:00:58,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766681393] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:00:58,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023575399] [2024-10-24 00:00:58,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 00:00:58,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:00:58,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:00:58,915 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:00:58,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-10-24 00:00:58,957 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 00:00:58,957 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:00:58,958 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-24 00:00:58,958 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:00:59,607 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:00:59,607 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:01:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:01:00,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023575399] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:01:00,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:01:00,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 69 [2024-10-24 00:01:00,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600995284] [2024-10-24 00:01:00,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:01:00,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-10-24 00:01:00,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:01:00,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-10-24 00:01:00,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=884, Invalid=3808, Unknown=0, NotChecked=0, Total=4692 [2024-10-24 00:01:00,150 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 69 states, 69 states have (on average 1.173913043478261) internal successors, (81), 69 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:01:00,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:01:00,328 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2024-10-24 00:01:00,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-24 00:01:00,329 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.173913043478261) internal successors, (81), 69 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-10-24 00:01:00,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:01:00,329 INFO L225 Difference]: With dead ends: 78 [2024-10-24 00:01:00,329 INFO L226 Difference]: Without dead ends: 55 [2024-10-24 00:01:00,330 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 23 SyntacticMatches, 12 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3173 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=905, Invalid=3925, Unknown=0, NotChecked=0, Total=4830 [2024-10-24 00:01:00,330 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:01:00,330 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 62 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:01:00,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-24 00:01:00,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-10-24 00:01:00,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:01:00,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2024-10-24 00:01:00,342 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 37 [2024-10-24 00:01:00,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:01:00,342 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2024-10-24 00:01:00,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.173913043478261) internal successors, (81), 69 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:01:00,343 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2024-10-24 00:01:00,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-24 00:01:00,343 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:01:00,343 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:01:00,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-10-24 00:01:00,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-10-24 00:01:00,544 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:01:00,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:01:00,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1495230444, now seen corresponding path program 20 times [2024-10-24 00:01:00,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:01:00,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10512066] [2024-10-24 00:01:00,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:01:00,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:01:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:01:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 55 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:01:01,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:01:01,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10512066] [2024-10-24 00:01:01,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10512066] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:01:01,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259385715] [2024-10-24 00:01:01,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 00:01:01,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:01:01,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:01:01,222 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:01:01,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-10-24 00:01:01,266 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 00:01:01,266 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:01:01,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-24 00:01:01,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:01:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:01:01,866 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:01:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:01:02,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259385715] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:01:02,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:01:02,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 69 [2024-10-24 00:01:02,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689281522] [2024-10-24 00:01:02,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:01:02,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-10-24 00:01:02,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:01:02,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-10-24 00:01:02,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=895, Invalid=3797, Unknown=0, NotChecked=0, Total=4692 [2024-10-24 00:01:02,469 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 69 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:01:02,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:01:02,650 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2024-10-24 00:01:02,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-24 00:01:02,650 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 69 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-10-24 00:01:02,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:01:02,651 INFO L225 Difference]: With dead ends: 62 [2024-10-24 00:01:02,651 INFO L226 Difference]: Without dead ends: 56 [2024-10-24 00:01:02,651 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 23 SyntacticMatches, 12 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3199 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=937, Invalid=3893, Unknown=0, NotChecked=0, Total=4830 [2024-10-24 00:01:02,652 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 00:01:02,652 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 68 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 00:01:02,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-24 00:01:02,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-10-24 00:01:02,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:01:02,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2024-10-24 00:01:02,660 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 37 [2024-10-24 00:01:02,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:01:02,661 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2024-10-24 00:01:02,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 69 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:01:02,661 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2024-10-24 00:01:02,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-24 00:01:02,661 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:01:02,661 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:01:02,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-10-24 00:01:02,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-10-24 00:01:02,862 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:01:02,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:01:02,862 INFO L85 PathProgramCache]: Analyzing trace with hash 54238296, now seen corresponding path program 21 times [2024-10-24 00:01:02,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:01:02,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413465252] [2024-10-24 00:01:02,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:01:02,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:01:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:01:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 66 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:01:03,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:01:03,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413465252] [2024-10-24 00:01:03,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413465252] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:01:03,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58900574] [2024-10-24 00:01:03,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 00:01:03,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:01:03,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:01:03,486 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:01:03,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-10-24 00:01:03,531 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-10-24 00:01:03,531 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:01:03,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-24 00:01:03,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:01:04,329 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:01:04,329 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:01:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:01:05,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58900574] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:01:05,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:01:05,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 76 [2024-10-24 00:01:05,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497726535] [2024-10-24 00:01:05,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:01:05,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-10-24 00:01:05,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:01:05,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-10-24 00:01:05,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1013, Invalid=4687, Unknown=0, NotChecked=0, Total=5700 [2024-10-24 00:01:05,005 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 76 states, 76 states have (on average 1.144736842105263) internal successors, (87), 76 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:01:05,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:01:05,275 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2024-10-24 00:01:05,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-24 00:01:05,276 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.144736842105263) internal successors, (87), 76 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-10-24 00:01:05,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:01:05,276 INFO L225 Difference]: With dead ends: 82 [2024-10-24 00:01:05,276 INFO L226 Difference]: Without dead ends: 58 [2024-10-24 00:01:05,277 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 14 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3916 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1045, Invalid=4961, Unknown=0, NotChecked=0, Total=6006 [2024-10-24 00:01:05,277 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 00:01:05,277 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 59 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 00:01:05,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-24 00:01:05,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-10-24 00:01:05,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.087719298245614) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:01:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2024-10-24 00:01:05,286 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 38 [2024-10-24 00:01:05,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:01:05,286 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2024-10-24 00:01:05,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.144736842105263) internal successors, (87), 76 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:01:05,286 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2024-10-24 00:01:05,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-24 00:01:05,287 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:01:05,287 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:01:05,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-10-24 00:01:05,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:01:05,487 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:01:05,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:01:05,488 INFO L85 PathProgramCache]: Analyzing trace with hash 271245972, now seen corresponding path program 21 times [2024-10-24 00:01:05,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:01:05,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317428029] [2024-10-24 00:01:05,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:01:05,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:01:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:01:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 66 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:01:06,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:01:06,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317428029] [2024-10-24 00:01:06,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317428029] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:01:06,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498892287] [2024-10-24 00:01:06,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 00:01:06,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:01:06,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:01:06,159 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:01:06,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-10-24 00:01:06,205 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-10-24 00:01:06,205 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:01:06,206 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-24 00:01:06,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:01:06,913 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:01:06,913 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:01:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:01:07,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498892287] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:01:07,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:01:07,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 75 [2024-10-24 00:01:07,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058139691] [2024-10-24 00:01:07,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:01:07,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-10-24 00:01:07,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:01:07,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-10-24 00:01:07,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1016, Invalid=4534, Unknown=0, NotChecked=0, Total=5550 [2024-10-24 00:01:07,636 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 75 states, 75 states have (on average 1.16) internal successors, (87), 75 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:01:07,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:01:07,826 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2024-10-24 00:01:07,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-24 00:01:07,826 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.16) internal successors, (87), 75 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-10-24 00:01:07,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:01:07,826 INFO L225 Difference]: With dead ends: 67 [2024-10-24 00:01:07,826 INFO L226 Difference]: Without dead ends: 61 [2024-10-24 00:01:07,827 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 20 SyntacticMatches, 13 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3745 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1060, Invalid=4640, Unknown=0, NotChecked=0, Total=5700 [2024-10-24 00:01:07,827 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 00:01:07,828 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 57 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 00:01:07,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-24 00:01:07,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2024-10-24 00:01:07,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 58 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:01:07,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2024-10-24 00:01:07,837 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 38 [2024-10-24 00:01:07,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:01:07,837 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2024-10-24 00:01:07,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.16) internal successors, (87), 75 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:01:07,837 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2024-10-24 00:01:07,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-24 00:01:07,838 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:01:07,838 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:01:07,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-10-24 00:01:08,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-10-24 00:01:08,038 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:01:08,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:01:08,039 INFO L85 PathProgramCache]: Analyzing trace with hash -964156396, now seen corresponding path program 22 times [2024-10-24 00:01:08,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:01:08,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763866111] [2024-10-24 00:01:08,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:01:08,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:01:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:01:08,744 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 79 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:01:08,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:01:08,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763866111] [2024-10-24 00:01:08,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763866111] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:01:08,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506442113] [2024-10-24 00:01:08,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 00:01:08,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:01:08,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:01:08,746 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:01:08,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-10-24 00:01:08,789 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 00:01:08,789 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:01:08,790 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-24 00:01:08,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:01:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:01:09,760 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:01:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:01:10,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506442113] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:01:10,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:01:10,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 74 [2024-10-24 00:01:10,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550651691] [2024-10-24 00:01:10,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:01:10,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-10-24 00:01:10,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:01:10,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-10-24 00:01:10,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1014, Invalid=4388, Unknown=0, NotChecked=0, Total=5402 [2024-10-24 00:01:10,480 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 74 states, 74 states have (on average 1.162162162162162) internal successors, (86), 74 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:01:10,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:01:10,731 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2024-10-24 00:01:10,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-24 00:01:10,732 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.162162162162162) internal successors, (86), 74 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-10-24 00:01:10,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:01:10,732 INFO L225 Difference]: With dead ends: 82 [2024-10-24 00:01:10,732 INFO L226 Difference]: Without dead ends: 58 [2024-10-24 00:01:10,733 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 12 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3649 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1036, Invalid=4514, Unknown=0, NotChecked=0, Total=5550 [2024-10-24 00:01:10,733 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 00:01:10,733 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 78 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 00:01:10,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-24 00:01:10,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-10-24 00:01:10,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:01:10,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2024-10-24 00:01:10,746 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 39 [2024-10-24 00:01:10,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:01:10,746 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2024-10-24 00:01:10,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.162162162162162) internal successors, (86), 74 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:01:10,747 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2024-10-24 00:01:10,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-24 00:01:10,747 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:01:10,747 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:01:10,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-10-24 00:01:10,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-10-24 00:01:10,948 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:01:10,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:01:10,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2041991951, now seen corresponding path program 22 times [2024-10-24 00:01:10,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:01:10,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719577421] [2024-10-24 00:01:10,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:01:10,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:01:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:01:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 66 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:01:11,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:01:11,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719577421] [2024-10-24 00:01:11,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719577421] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:01:11,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531481888] [2024-10-24 00:01:11,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 00:01:11,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:01:11,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:01:11,686 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:01:11,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-10-24 00:01:11,729 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 00:01:11,729 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:01:11,730 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-24 00:01:11,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:01:12,492 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:01:12,492 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:01:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:01:13,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531481888] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:01:13,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:01:13,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 74 [2024-10-24 00:01:13,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102210049] [2024-10-24 00:01:13,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:01:13,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-10-24 00:01:13,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:01:13,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-10-24 00:01:13,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=4376, Unknown=0, NotChecked=0, Total=5402 [2024-10-24 00:01:13,118 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 74 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 74 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:01:13,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:01:13,372 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2024-10-24 00:01:13,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-24 00:01:13,373 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 74 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-10-24 00:01:13,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:01:13,374 INFO L225 Difference]: With dead ends: 65 [2024-10-24 00:01:13,374 INFO L226 Difference]: Without dead ends: 59 [2024-10-24 00:01:13,374 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 23 SyntacticMatches, 13 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3719 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1071, Invalid=4479, Unknown=0, NotChecked=0, Total=5550 [2024-10-24 00:01:13,374 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 00:01:13,375 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 55 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 00:01:13,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-24 00:01:13,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-10-24 00:01:13,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:01:13,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2024-10-24 00:01:13,385 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 39 [2024-10-24 00:01:13,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:01:13,385 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2024-10-24 00:01:13,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 74 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:01:13,386 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2024-10-24 00:01:13,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-24 00:01:13,386 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:01:13,386 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:01:13,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-10-24 00:01:13,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2024-10-24 00:01:13,587 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:01:13,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:01:13,587 INFO L85 PathProgramCache]: Analyzing trace with hash 284500763, now seen corresponding path program 23 times [2024-10-24 00:01:13,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:01:13,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935599957] [2024-10-24 00:01:13,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:01:13,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:01:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:01:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 78 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:01:14,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:01:14,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935599957] [2024-10-24 00:01:14,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935599957] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:01:14,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489171508] [2024-10-24 00:01:14,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 00:01:14,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:01:14,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:01:14,390 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:01:14,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-10-24 00:01:14,446 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-10-24 00:01:14,446 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:01:14,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-24 00:01:14,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:01:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:01:15,358 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:01:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:01:16,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489171508] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:01:16,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:01:16,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 81 [2024-10-24 00:01:16,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121093366] [2024-10-24 00:01:16,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:01:16,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-10-24 00:01:16,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:01:16,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-10-24 00:01:16,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1151, Invalid=5329, Unknown=0, NotChecked=0, Total=6480 [2024-10-24 00:01:16,110 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 81 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:01:16,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:01:16,372 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2024-10-24 00:01:16,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-24 00:01:16,373 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 0 states have call successors, (0), 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 40 [2024-10-24 00:01:16,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:01:16,373 INFO L225 Difference]: With dead ends: 86 [2024-10-24 00:01:16,374 INFO L226 Difference]: Without dead ends: 61 [2024-10-24 00:01:16,374 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 18 SyntacticMatches, 15 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4490 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1184, Invalid=5622, Unknown=0, NotChecked=0, Total=6806 [2024-10-24 00:01:16,375 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 00:01:16,375 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 57 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 00:01:16,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-24 00:01:16,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-10-24 00:01:16,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 60 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:01:16,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2024-10-24 00:01:16,384 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 40 [2024-10-24 00:01:16,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:01:16,385 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2024-10-24 00:01:16,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:01:16,385 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2024-10-24 00:01:16,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-24 00:01:16,385 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:01:16,385 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:01:16,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-10-24 00:01:16,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:01:16,588 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:01:16,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:01:16,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1522784613, now seen corresponding path program 23 times [2024-10-24 00:01:16,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:01:16,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029229845] [2024-10-24 00:01:16,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:01:16,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:01:16,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:01:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 78 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:01:17,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:01:17,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029229845] [2024-10-24 00:01:17,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029229845] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:01:17,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196466408] [2024-10-24 00:01:17,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 00:01:17,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:01:17,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:01:17,444 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:01:17,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-10-24 00:01:17,490 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-10-24 00:01:17,490 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:01:17,490 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-24 00:01:17,491 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:01:18,278 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:01:18,278 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:01:18,987 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:01:18,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196466408] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:01:18,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:01:18,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 80 [2024-10-24 00:01:18,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692872691] [2024-10-24 00:01:18,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:01:18,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-10-24 00:01:18,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:01:18,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-10-24 00:01:18,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=5165, Unknown=0, NotChecked=0, Total=6320 [2024-10-24 00:01:18,989 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 80 states, 80 states have (on average 1.15) internal successors, (92), 80 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:01:19,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:01:19,187 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2024-10-24 00:01:19,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-24 00:01:19,187 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.15) internal successors, (92), 80 states have internal predecessors, (92), 0 states have call successors, (0), 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 40 [2024-10-24 00:01:19,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:01:19,188 INFO L225 Difference]: With dead ends: 70 [2024-10-24 00:01:19,188 INFO L226 Difference]: Without dead ends: 64 [2024-10-24 00:01:19,189 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 20 SyntacticMatches, 14 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4306 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1202, Invalid=5278, Unknown=0, NotChecked=0, Total=6480 [2024-10-24 00:01:19,189 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 00:01:19,189 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 56 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 00:01:19,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-10-24 00:01:19,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2024-10-24 00:01:19,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 61 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:01:19,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2024-10-24 00:01:19,204 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 40 [2024-10-24 00:01:19,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:01:19,204 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2024-10-24 00:01:19,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.15) internal successors, (92), 80 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:01:19,204 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2024-10-24 00:01:19,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-24 00:01:19,205 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:01:19,205 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:01:19,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-10-24 00:01:19,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:01:19,406 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:01:19,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:01:19,406 INFO L85 PathProgramCache]: Analyzing trace with hash -744529683, now seen corresponding path program 24 times [2024-10-24 00:01:19,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:01:19,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730486492] [2024-10-24 00:01:19,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:01:19,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:01:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:01:20,077 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 92 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:01:20,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:01:20,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730486492] [2024-10-24 00:01:20,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730486492] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:01:20,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468436938] [2024-10-24 00:01:20,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 00:01:20,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:01:20,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:01:20,079 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:01:20,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-10-24 00:01:20,124 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-10-24 00:01:20,124 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:01:20,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-24 00:01:20,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:01:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:01:20,917 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:01:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:01:21,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468436938] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:01:21,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:01:21,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 79 [2024-10-24 00:01:21,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497866705] [2024-10-24 00:01:21,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:01:21,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2024-10-24 00:01:21,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:01:21,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2024-10-24 00:01:21,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1153, Invalid=5009, Unknown=0, NotChecked=0, Total=6162 [2024-10-24 00:01:21,598 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 79 states, 79 states have (on average 1.1518987341772151) internal successors, (91), 79 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)