./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/mono-crafted_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 00e8f12f1d0e3d2fc679744754ceeef2daa37b874cd8db07b5ab8c35684165c0 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 01:55:51,462 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 01:55:51,512 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 01:55:51,515 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 01:55:51,518 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 01:55:51,538 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 01:55:51,540 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 01:55:51,541 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 01:55:51,541 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 01:55:51,542 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 01:55:51,542 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 01:55:51,542 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 01:55:51,543 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 01:55:51,545 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 01:55:51,545 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 01:55:51,545 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 01:55:51,545 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 01:55:51,546 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 01:55:51,546 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 01:55:51,546 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 01:55:51,546 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 01:55:51,550 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 01:55:51,550 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 01:55:51,550 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 01:55:51,550 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 01:55:51,550 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 01:55:51,551 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 01:55:51,551 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 01:55:51,551 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 01:55:51,551 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 01:55:51,551 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 01:55:51,551 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 01:55:51,551 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 01:55:51,552 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 01:55:51,552 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 01:55:51,552 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 01:55:51,552 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 01:55:51,552 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 01:55:51,552 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 01:55:51,552 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 01:55:51,552 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 01:55:51,553 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 01:55:51,553 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00e8f12f1d0e3d2fc679744754ceeef2daa37b874cd8db07b5ab8c35684165c0 [2024-10-11 01:55:51,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 01:55:51,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 01:55:51,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 01:55:51,777 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 01:55:51,778 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 01:55:51,779 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c [2024-10-11 01:55:53,010 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 01:55:53,149 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 01:55:53,149 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c [2024-10-11 01:55:53,154 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/2bb474ab4/78c6a3bc36794db0a6d2610a8a30efb1/FLAG30f1103ff [2024-10-11 01:55:53,164 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/2bb474ab4/78c6a3bc36794db0a6d2610a8a30efb1 [2024-10-11 01:55:53,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 01:55:53,167 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 01:55:53,168 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 01:55:53,168 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 01:55:53,171 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 01:55:53,172 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 01:55:53" (1/1) ... [2024-10-11 01:55:53,173 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a2a0b18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:55:53, skipping insertion in model container [2024-10-11 01:55:53,173 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 01:55:53" (1/1) ... [2024-10-11 01:55:53,187 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 01:55:53,317 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/mono-crafted_1.c[318,331] [2024-10-11 01:55:53,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 01:55:53,337 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 01:55:53,347 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/mono-crafted_1.c[318,331] [2024-10-11 01:55:53,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 01:55:53,361 INFO L204 MainTranslator]: Completed translation [2024-10-11 01:55:53,362 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:55:53 WrapperNode [2024-10-11 01:55:53,362 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 01:55:53,363 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 01:55:53,363 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 01:55:53,363 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 01:55:53,368 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:55:53" (1/1) ... [2024-10-11 01:55:53,373 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:55:53" (1/1) ... [2024-10-11 01:55:53,384 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 44 [2024-10-11 01:55:53,385 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 01:55:53,385 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 01:55:53,385 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 01:55:53,385 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 01:55:53,392 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:55:53" (1/1) ... [2024-10-11 01:55:53,392 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:55:53" (1/1) ... [2024-10-11 01:55:53,394 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:55:53" (1/1) ... [2024-10-11 01:55:53,400 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]. [2024-10-11 01:55:53,401 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:55:53" (1/1) ... [2024-10-11 01:55:53,401 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:55:53" (1/1) ... [2024-10-11 01:55:53,402 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:55:53" (1/1) ... [2024-10-11 01:55:53,404 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:55:53" (1/1) ... [2024-10-11 01:55:53,405 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:55:53" (1/1) ... [2024-10-11 01:55:53,406 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:55:53" (1/1) ... [2024-10-11 01:55:53,406 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 01:55:53,407 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 01:55:53,407 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 01:55:53,407 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 01:55:53,408 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:55:53" (1/1) ... [2024-10-11 01:55:53,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 01:55:53,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:55:53,432 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 01:55:53,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 01:55:53,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 01:55:53,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 01:55:53,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 01:55:53,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 01:55:53,562 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 01:55:53,564 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 01:55:53,662 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-10-11 01:55:53,662 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 01:55:53,691 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 01:55:53,692 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-11 01:55:53,692 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 01:55:53 BoogieIcfgContainer [2024-10-11 01:55:53,692 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 01:55:53,694 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 01:55:53,694 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 01:55:53,697 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 01:55:53,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 01:55:53" (1/3) ... [2024-10-11 01:55:53,698 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cccda3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 01:55:53, skipping insertion in model container [2024-10-11 01:55:53,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:55:53" (2/3) ... [2024-10-11 01:55:53,699 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cccda3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 01:55:53, skipping insertion in model container [2024-10-11 01:55:53,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 01:55:53" (3/3) ... [2024-10-11 01:55:53,701 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_1.c [2024-10-11 01:55:53,719 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 01:55:53,719 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 01:55:53,781 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 01:55:53,787 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;@23dc7b86, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 01:55:53,788 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-11 01:55:53,791 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.875) internal successors, (15), 9 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) [2024-10-11 01:55:53,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-11 01:55:53,795 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:55:53,796 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 01:55:53,796 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:55:53,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:55:53,800 INFO L85 PathProgramCache]: Analyzing trace with hash -2043540179, now seen corresponding path program 1 times [2024-10-11 01:55:53,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:55:53,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555603610] [2024-10-11 01:55:53,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:55:53,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:55:53,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:55:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:55:53,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:55:53,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555603610] [2024-10-11 01:55:53,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555603610] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 01:55:53,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 01:55:53,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 01:55:53,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054824987] [2024-10-11 01:55:53,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 01:55:53,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 01:55:53,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:55:53,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 01:55:53,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 01:55:53,958 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.875) internal successors, (15), 9 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:55:53,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:55:53,973 INFO L93 Difference]: Finished difference Result 17 states and 24 transitions. [2024-10-11 01:55:53,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 01:55:53,974 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2024-10-11 01:55:53,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:55:53,979 INFO L225 Difference]: With dead ends: 17 [2024-10-11 01:55:53,979 INFO L226 Difference]: Without dead ends: 8 [2024-10-11 01:55:53,981 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 01:55:53,984 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 01:55:53,985 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 01:55:53,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2024-10-11 01:55:54,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2024-10-11 01:55:54,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:55:54,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2024-10-11 01:55:54,011 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 6 [2024-10-11 01:55:54,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:55:54,011 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2024-10-11 01:55:54,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:55:54,011 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2024-10-11 01:55:54,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-11 01:55:54,011 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:55:54,012 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 01:55:54,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 01:55:54,012 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:55:54,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:55:54,013 INFO L85 PathProgramCache]: Analyzing trace with hash -2052775389, now seen corresponding path program 1 times [2024-10-11 01:55:54,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:55:54,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846773538] [2024-10-11 01:55:54,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:55:54,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:55:54,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:55:54,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:55:54,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:55:54,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846773538] [2024-10-11 01:55:54,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846773538] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 01:55:54,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 01:55:54,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 01:55:54,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486427771] [2024-10-11 01:55:54,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 01:55:54,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 01:55:54,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:55:54,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 01:55:54,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 01:55:54,088 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:55:54,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:55:54,113 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2024-10-11 01:55:54,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 01:55:54,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2024-10-11 01:55:54,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:55:54,114 INFO L225 Difference]: With dead ends: 17 [2024-10-11 01:55:54,114 INFO L226 Difference]: Without dead ends: 10 [2024-10-11 01:55:54,114 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 01:55:54,115 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 01:55:54,116 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 10 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 01:55:54,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2024-10-11 01:55:54,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2024-10-11 01:55:54,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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) [2024-10-11 01:55:54,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2024-10-11 01:55:54,123 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2024-10-11 01:55:54,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:55:54,124 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2024-10-11 01:55:54,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:55:54,125 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2024-10-11 01:55:54,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-11 01:55:54,126 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:55:54,127 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:55:54,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 01:55:54,128 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:55:54,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:55:54,128 INFO L85 PathProgramCache]: Analyzing trace with hash 82784800, now seen corresponding path program 1 times [2024-10-11 01:55:54,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:55:54,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116406063] [2024-10-11 01:55:54,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:55:54,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:55:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:55:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:55:54,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:55:54,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116406063] [2024-10-11 01:55:54,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116406063] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:55:54,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144589024] [2024-10-11 01:55:54,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:55:54,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:55:54,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:55:54,232 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:55:54,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 01:55:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:55:54,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-11 01:55:54,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:55:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:55:54,334 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:55:54,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:55:54,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144589024] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:55:54,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:55:54,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-11 01:55:54,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568367136] [2024-10-11 01:55:54,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:55:54,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 01:55:54,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:55:54,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 01:55:54,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 01:55:54,371 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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) [2024-10-11 01:55:54,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:55:54,408 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2024-10-11 01:55:54,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 01:55:54,408 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 8 [2024-10-11 01:55:54,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:55:54,408 INFO L225 Difference]: With dead ends: 22 [2024-10-11 01:55:54,409 INFO L226 Difference]: Without dead ends: 15 [2024-10-11 01:55:54,409 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 01:55:54,410 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 01:55:54,410 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 01:55:54,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-10-11 01:55:54,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-10-11 01:55:54,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 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) [2024-10-11 01:55:54,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2024-10-11 01:55:54,413 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2024-10-11 01:55:54,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:55:54,413 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2024-10-11 01:55:54,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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) [2024-10-11 01:55:54,413 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2024-10-11 01:55:54,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-11 01:55:54,414 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:55:54,414 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-11 01:55:54,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 01:55:54,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:55:54,616 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:55:54,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:55:54,616 INFO L85 PathProgramCache]: Analyzing trace with hash 2105829779, now seen corresponding path program 1 times [2024-10-11 01:55:54,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:55:54,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333195788] [2024-10-11 01:55:54,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:55:54,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:55:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:55:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 01:55:54,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:55:54,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333195788] [2024-10-11 01:55:54,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333195788] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:55:54,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181984620] [2024-10-11 01:55:54,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:55:54,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:55:54,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:55:54,765 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:55:54,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 01:55:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:55:54,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 01:55:54,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:55:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 01:55:54,850 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:55:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 01:55:54,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181984620] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:55:54,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:55:54,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-10-11 01:55:54,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43029626] [2024-10-11 01:55:54,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:55:54,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 01:55:54,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:55:54,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 01:55:54,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-11 01:55:54,901 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:55:54,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:55:54,949 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2024-10-11 01:55:54,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 01:55:54,951 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-11 01:55:54,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:55:54,951 INFO L225 Difference]: With dead ends: 33 [2024-10-11 01:55:54,951 INFO L226 Difference]: Without dead ends: 23 [2024-10-11 01:55:54,951 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-11 01:55:54,952 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 01:55:54,952 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 01:55:54,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-11 01:55:54,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-10-11 01:55:54,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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) [2024-10-11 01:55:54,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-10-11 01:55:54,958 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2024-10-11 01:55:54,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:55:54,959 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-10-11 01:55:54,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:55:54,959 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-10-11 01:55:54,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-11 01:55:54,959 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:55:54,960 INFO L215 NwaCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2024-10-11 01:55:54,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 01:55:55,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:55:55,160 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:55:55,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:55:55,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2017325575, now seen corresponding path program 2 times [2024-10-11 01:55:55,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:55:55,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236748457] [2024-10-11 01:55:55,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:55:55,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:55:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:55:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 01:55:55,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:55:55,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236748457] [2024-10-11 01:55:55,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236748457] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:55:55,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719836830] [2024-10-11 01:55:55,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 01:55:55,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:55:55,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:55:55,396 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:55:55,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 01:55:55,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 01:55:55,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:55:55,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 01:55:55,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:55:55,491 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 01:55:55,492 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:55:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 01:55:55,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719836830] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:55:55,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:55:55,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-10-11 01:55:55,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6390444] [2024-10-11 01:55:55,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:55:55,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 01:55:55,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:55:55,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 01:55:55,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-10-11 01:55:55,622 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2024-10-11 01:55:55,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:55:55,678 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2024-10-11 01:55:55,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 01:55:55,678 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-11 01:55:55,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:55:55,679 INFO L225 Difference]: With dead ends: 49 [2024-10-11 01:55:55,680 INFO L226 Difference]: Without dead ends: 39 [2024-10-11 01:55:55,681 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-10-11 01:55:55,681 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 01:55:55,681 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 01:55:55,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-11 01:55:55,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-10-11 01:55:55,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 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) [2024-10-11 01:55:55,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2024-10-11 01:55:55,688 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 22 [2024-10-11 01:55:55,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:55:55,688 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2024-10-11 01:55:55,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2024-10-11 01:55:55,689 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2024-10-11 01:55:55,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-11 01:55:55,690 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:55:55,690 INFO L215 NwaCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1] [2024-10-11 01:55:55,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 01:55:55,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:55:55,891 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:55:55,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:55:55,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1737746159, now seen corresponding path program 3 times [2024-10-11 01:55:55,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:55:55,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122446644] [2024-10-11 01:55:55,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:55:55,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:55:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:55:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 01:55:56,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:55:56,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122446644] [2024-10-11 01:55:56,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122446644] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:55:56,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749698261] [2024-10-11 01:55:56,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 01:55:56,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:55:56,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:55:56,203 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:55:56,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 01:55:56,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-11 01:55:56,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:55:56,255 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 01:55:56,256 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:55:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-10-11 01:55:56,420 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 01:55:56,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749698261] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 01:55:56,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 01:55:56,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [16] total 19 [2024-10-11 01:55:56,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055921403] [2024-10-11 01:55:56,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 01:55:56,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 01:55:56,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:55:56,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 01:55:56,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2024-10-11 01:55:56,422 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:55:56,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:55:56,445 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2024-10-11 01:55:56,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 01:55:56,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-10-11 01:55:56,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:55:56,447 INFO L225 Difference]: With dead ends: 52 [2024-10-11 01:55:56,447 INFO L226 Difference]: Without dead ends: 48 [2024-10-11 01:55:56,447 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2024-10-11 01:55:56,448 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 01:55:56,448 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 01:55:56,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-11 01:55:56,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2024-10-11 01:55:56,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 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) [2024-10-11 01:55:56,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2024-10-11 01:55:56,456 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 38 [2024-10-11 01:55:56,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:55:56,456 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2024-10-11 01:55:56,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:55:56,457 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2024-10-11 01:55:56,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-11 01:55:56,458 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:55:56,458 INFO L215 NwaCegarLoop]: trace histogram [16, 14, 3, 2, 1, 1, 1, 1, 1, 1] [2024-10-11 01:55:56,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-11 01:55:56,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-11 01:55:56,663 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:55:56,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:55:56,663 INFO L85 PathProgramCache]: Analyzing trace with hash -686232931, now seen corresponding path program 1 times [2024-10-11 01:55:56,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:55:56,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009474026] [2024-10-11 01:55:56,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:55:56,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:55:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:55:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 01:55:56,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:55:56,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009474026] [2024-10-11 01:55:56,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009474026] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:55:56,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221098486] [2024-10-11 01:55:56,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:55:56,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:55:56,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:55:56,936 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:55:56,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 01:55:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:55:56,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-11 01:55:57,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:55:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 01:55:57,057 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:55:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 01:55:57,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221098486] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:55:57,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:55:57,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2024-10-11 01:55:57,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351206552] [2024-10-11 01:55:57,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:55:57,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-11 01:55:57,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:55:57,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-11 01:55:57,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-10-11 01:55:57,408 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:55:57,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:55:57,482 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2024-10-11 01:55:57,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-11 01:55:57,482 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-10-11 01:55:57,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:55:57,483 INFO L225 Difference]: With dead ends: 87 [2024-10-11 01:55:57,483 INFO L226 Difference]: Without dead ends: 74 [2024-10-11 01:55:57,484 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-10-11 01:55:57,484 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 01:55:57,484 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 01:55:57,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-10-11 01:55:57,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-10-11 01:55:57,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 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) [2024-10-11 01:55:57,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2024-10-11 01:55:57,491 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 41 [2024-10-11 01:55:57,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:55:57,491 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2024-10-11 01:55:57,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:55:57,491 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2024-10-11 01:55:57,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-11 01:55:57,492 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:55:57,492 INFO L215 NwaCegarLoop]: trace histogram [32, 30, 3, 2, 1, 1, 1, 1, 1, 1] [2024-10-11 01:55:57,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 01:55:57,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:55:57,693 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:55:57,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:55:57,694 INFO L85 PathProgramCache]: Analyzing trace with hash -466526515, now seen corresponding path program 2 times [2024-10-11 01:55:57,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:55:57,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272247455] [2024-10-11 01:55:57,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:55:57,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:55:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:55:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 01:55:58,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:55:58,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272247455] [2024-10-11 01:55:58,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272247455] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:55:58,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059247630] [2024-10-11 01:55:58,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 01:55:58,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:55:58,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:55:58,423 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:55:58,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 01:55:58,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 01:55:58,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:55:58,490 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-10-11 01:55:58,495 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:55:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 01:55:58,604 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:55:59,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 01:55:59,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059247630] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:55:59,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:55:59,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 64 [2024-10-11 01:55:59,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390831605] [2024-10-11 01:55:59,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:55:59,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-10-11 01:55:59,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:55:59,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-10-11 01:55:59,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2024-10-11 01:55:59,654 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 64 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:55:59,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:55:59,818 INFO L93 Difference]: Finished difference Result 151 states and 189 transitions. [2024-10-11 01:55:59,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-10-11 01:55:59,819 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 64 states have internal predecessors, (137), 0 states have call successors, (0), 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 73 [2024-10-11 01:55:59,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:55:59,820 INFO L225 Difference]: With dead ends: 151 [2024-10-11 01:55:59,820 INFO L226 Difference]: Without dead ends: 138 [2024-10-11 01:55:59,821 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2024-10-11 01:55:59,821 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 01:55:59,822 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 01:55:59,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-10-11 01:55:59,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2024-10-11 01:55:59,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0291970802919708) internal successors, (141), 137 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:55:59,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2024-10-11 01:55:59,841 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 73 [2024-10-11 01:55:59,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:55:59,842 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2024-10-11 01:55:59,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 64 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:55:59,842 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2024-10-11 01:55:59,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-10-11 01:55:59,846 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:55:59,846 INFO L215 NwaCegarLoop]: trace histogram [64, 62, 3, 2, 1, 1, 1, 1, 1, 1] [2024-10-11 01:55:59,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-11 01:56:00,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-11 01:56:00,047 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:56:00,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:56:00,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1907620051, now seen corresponding path program 3 times [2024-10-11 01:56:00,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:56:00,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779067647] [2024-10-11 01:56:00,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:56:00,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:56:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:56:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4102 backedges. 189 proven. 3906 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 01:56:02,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:56:02,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779067647] [2024-10-11 01:56:02,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779067647] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:56:02,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758475969] [2024-10-11 01:56:02,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 01:56:02,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:56:02,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:56:02,445 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:56:02,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 01:56:02,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-11 01:56:02,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:56:02,498 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 01:56:02,500 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:56:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4102 backedges. 190 proven. 6 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2024-10-11 01:56:02,848 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:56:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4102 backedges. 190 proven. 6 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2024-10-11 01:56:03,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758475969] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:56:03,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:56:03,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 5, 5] total 72 [2024-10-11 01:56:03,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503250390] [2024-10-11 01:56:03,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:56:03,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-10-11 01:56:03,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:56:03,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-10-11 01:56:03,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2124, Invalid=3132, Unknown=0, NotChecked=0, Total=5256 [2024-10-11 01:56:03,076 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand has 73 states, 73 states have (on average 2.1506849315068495) internal successors, (157), 72 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:56:04,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:56:04,665 INFO L93 Difference]: Finished difference Result 164 states and 179 transitions. [2024-10-11 01:56:04,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-10-11 01:56:04,665 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.1506849315068495) internal successors, (157), 72 states have internal predecessors, (157), 0 states have call successors, (0), 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 137 [2024-10-11 01:56:04,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:56:04,668 INFO L225 Difference]: With dead ends: 164 [2024-10-11 01:56:04,668 INFO L226 Difference]: Without dead ends: 151 [2024-10-11 01:56:04,672 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2532 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6597, Invalid=11763, Unknown=0, NotChecked=0, Total=18360 [2024-10-11 01:56:04,672 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 01:56:04,672 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 33 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 01:56:04,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-10-11 01:56:04,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 145. [2024-10-11 01:56:04,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0277777777777777) internal successors, (148), 144 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:56:04,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2024-10-11 01:56:04,686 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 137 [2024-10-11 01:56:04,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:56:04,686 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2024-10-11 01:56:04,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.1506849315068495) internal successors, (157), 72 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:56:04,686 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2024-10-11 01:56:04,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-10-11 01:56:04,687 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:56:04,687 INFO L215 NwaCegarLoop]: trace histogram [65, 63, 8, 2, 1, 1, 1, 1, 1, 1] [2024-10-11 01:56:04,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-11 01:56:04,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:56:04,890 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:56:04,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:56:04,890 INFO L85 PathProgramCache]: Analyzing trace with hash -304206244, now seen corresponding path program 4 times [2024-10-11 01:56:04,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:56:04,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505945547] [2024-10-11 01:56:04,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:56:04,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:56:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:56:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4261 backedges. 192 proven. 4032 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-10-11 01:56:07,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:56:07,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505945547] [2024-10-11 01:56:07,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505945547] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:56:07,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268385981] [2024-10-11 01:56:07,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 01:56:07,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:56:07,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:56:07,015 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:56:07,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 01:56:07,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 01:56:07,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:56:07,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 128 conjuncts are in the unsatisfiable core [2024-10-11 01:56:07,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:56:07,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4261 backedges. 192 proven. 4032 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-10-11 01:56:07,295 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:56:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4261 backedges. 192 proven. 4032 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-10-11 01:56:10,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268385981] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:56:10,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:56:10,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2024-10-11 01:56:10,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172950287] [2024-10-11 01:56:10,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:56:10,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2024-10-11 01:56:10,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:56:10,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2024-10-11 01:56:10,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2024-10-11 01:56:10,683 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand has 131 states, 131 states have (on average 2.053435114503817) internal successors, (269), 130 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:56:10,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:56:10,983 INFO L93 Difference]: Finished difference Result 293 states and 364 transitions. [2024-10-11 01:56:10,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2024-10-11 01:56:10,984 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.053435114503817) internal successors, (269), 130 states have internal predecessors, (269), 0 states have call successors, (0), 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 144 [2024-10-11 01:56:10,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:56:10,985 INFO L225 Difference]: With dead ends: 293 [2024-10-11 01:56:10,985 INFO L226 Difference]: Without dead ends: 275 [2024-10-11 01:56:10,988 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2024-10-11 01:56:10,989 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 01:56:10,990 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 01:56:10,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2024-10-11 01:56:11,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2024-10-11 01:56:11,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.0145985401459854) internal successors, (278), 274 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:56:11,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 278 transitions. [2024-10-11 01:56:11,028 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 278 transitions. Word has length 144 [2024-10-11 01:56:11,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:56:11,028 INFO L471 AbstractCegarLoop]: Abstraction has 275 states and 278 transitions. [2024-10-11 01:56:11,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.053435114503817) internal successors, (269), 130 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:56:11,028 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 278 transitions. [2024-10-11 01:56:11,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2024-10-11 01:56:11,034 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:56:11,034 INFO L215 NwaCegarLoop]: trace histogram [130, 128, 8, 2, 1, 1, 1, 1, 1, 1] [2024-10-11 01:56:11,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-11 01:56:11,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 01:56:11,235 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:56:11,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:56:11,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1396712103, now seen corresponding path program 5 times [2024-10-11 01:56:11,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:56:11,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439168141] [2024-10-11 01:56:11,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:56:11,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:56:11,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:56:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16936 backedges. 387 proven. 16512 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-10-11 01:56:20,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:56:20,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439168141] [2024-10-11 01:56:20,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439168141] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:56:20,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392811439] [2024-10-11 01:56:20,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 01:56:20,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:56:20,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:56:20,806 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:56:20,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 01:56:21,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 131 check-sat command(s) [2024-10-11 01:56:21,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:56:21,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 258 conjuncts are in the unsatisfiable core [2024-10-11 01:56:21,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:56:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16936 backedges. 387 proven. 16512 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-10-11 01:56:21,394 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:56:34,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16936 backedges. 387 proven. 16512 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-10-11 01:56:34,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392811439] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:56:34,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:56:34,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130, 130] total 260 [2024-10-11 01:56:34,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100329576] [2024-10-11 01:56:34,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:56:34,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 261 states [2024-10-11 01:56:34,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:56:34,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 261 interpolants. [2024-10-11 01:56:34,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33930, Invalid=33930, Unknown=0, NotChecked=0, Total=67860 [2024-10-11 01:56:34,558 INFO L87 Difference]: Start difference. First operand 275 states and 278 transitions. Second operand has 261 states, 261 states have (on average 2.0268199233716473) internal successors, (529), 260 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:56:35,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:56:35,664 INFO L93 Difference]: Finished difference Result 553 states and 689 transitions. [2024-10-11 01:56:35,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2024-10-11 01:56:35,665 INFO L78 Accepts]: Start accepts. Automaton has has 261 states, 261 states have (on average 2.0268199233716473) internal successors, (529), 260 states have internal predecessors, (529), 0 states have call successors, (0), 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 274 [2024-10-11 01:56:35,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:56:35,667 INFO L225 Difference]: With dead ends: 553 [2024-10-11 01:56:35,667 INFO L226 Difference]: Without dead ends: 535 [2024-10-11 01:56:35,670 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=33930, Invalid=33930, Unknown=0, NotChecked=0, Total=67860 [2024-10-11 01:56:35,670 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 01:56:35,670 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 01:56:35,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2024-10-11 01:56:35,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2024-10-11 01:56:35,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 1.0074906367041199) internal successors, (538), 534 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:56:35,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 538 transitions. [2024-10-11 01:56:35,700 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 538 transitions. Word has length 274 [2024-10-11 01:56:35,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:56:35,701 INFO L471 AbstractCegarLoop]: Abstraction has 535 states and 538 transitions. [2024-10-11 01:56:35,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 261 states, 261 states have (on average 2.0268199233716473) internal successors, (529), 260 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:56:35,701 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 538 transitions. [2024-10-11 01:56:35,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2024-10-11 01:56:35,705 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:56:35,706 INFO L215 NwaCegarLoop]: trace histogram [260, 258, 8, 2, 1, 1, 1, 1, 1, 1] [2024-10-11 01:56:35,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-11 01:56:35,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:56:35,906 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:56:35,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:56:35,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1568094611, now seen corresponding path program 6 times [2024-10-11 01:56:35,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:56:35,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114086979] [2024-10-11 01:56:35,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:56:35,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:56:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:57:23,484 INFO L134 CoverageAnalysis]: Checked inductivity of 67636 backedges. 777 proven. 66822 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-10-11 01:57:23,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:57:23,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114086979] [2024-10-11 01:57:23,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114086979] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:57:23,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440279640] [2024-10-11 01:57:23,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 01:57:23,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:57:23,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:57:23,487 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:57:23,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 01:57:23,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-10-11 01:57:23,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:57:23,621 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 01:57:23,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:57:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 67636 backedges. 778 proven. 36 refuted. 0 times theorem prover too weak. 66822 trivial. 0 not checked. [2024-10-11 01:57:25,247 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:57:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 67636 backedges. 778 proven. 36 refuted. 0 times theorem prover too weak. 66822 trivial. 0 not checked. [2024-10-11 01:57:26,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440279640] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:57:26,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:57:26,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [260, 10, 10] total 278 [2024-10-11 01:57:26,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029084228] [2024-10-11 01:57:26,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:57:26,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 279 states [2024-10-11 01:57:26,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:57:26,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 279 interpolants. [2024-10-11 01:57:26,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34119, Invalid=43443, Unknown=0, NotChecked=0, Total=77562 [2024-10-11 01:57:26,455 INFO L87 Difference]: Start difference. First operand 535 states and 538 transitions. Second operand has 279 states, 279 states have (on average 2.003584229390681) internal successors, (559), 278 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)