./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/tcpy.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/tcpy.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a747677fdea16741fbb3fca3d9510254677728ef5906b9bf8e219064accd3a39 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 09:56:47,618 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 09:56:47,704 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 09:56:47,708 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 09:56:47,709 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 09:56:47,742 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 09:56:47,743 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 09:56:47,743 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 09:56:47,744 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 09:56:47,745 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 09:56:47,746 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 09:56:47,746 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 09:56:47,747 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 09:56:47,748 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 09:56:47,749 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 09:56:47,749 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 09:56:47,749 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 09:56:47,750 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 09:56:47,750 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 09:56:47,750 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 09:56:47,750 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 09:56:47,752 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 09:56:47,752 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 09:56:47,753 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 09:56:47,753 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 09:56:47,753 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 09:56:47,753 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 09:56:47,753 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 09:56:47,754 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 09:56:47,754 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 09:56:47,754 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 09:56:47,754 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 09:56:47,755 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 09:56:47,755 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 09:56:47,757 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 09:56:47,758 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 09:56:47,758 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 09:56:47,758 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 09:56:47,758 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 09:56:47,758 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 09:56:47,758 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 09:56:47,759 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 09:56:47,759 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a747677fdea16741fbb3fca3d9510254677728ef5906b9bf8e219064accd3a39 [2024-11-08 09:56:48,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 09:56:48,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 09:56:48,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 09:56:48,059 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 09:56:48,063 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 09:56:48,065 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/tcpy.c [2024-11-08 09:56:49,586 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 09:56:49,763 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 09:56:49,763 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/tcpy.c [2024-11-08 09:56:49,772 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3197abd40/5222d5f9310047c9bd8c0d2ce2817786/FLAG50c494bf8 [2024-11-08 09:56:49,788 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3197abd40/5222d5f9310047c9bd8c0d2ce2817786 [2024-11-08 09:56:49,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 09:56:49,791 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 09:56:49,793 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 09:56:49,793 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 09:56:49,799 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 09:56:49,800 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 09:56:49" (1/1) ... [2024-11-08 09:56:49,801 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a8ce98a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:56:49, skipping insertion in model container [2024-11-08 09:56:49,801 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 09:56:49" (1/1) ... [2024-11-08 09:56:49,820 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 09:56:50,007 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/tcpy.c[395,408] [2024-11-08 09:56:50,037 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 09:56:50,046 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 09:56:50,057 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/tcpy.c[395,408] [2024-11-08 09:56:50,064 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 09:56:50,081 INFO L204 MainTranslator]: Completed translation [2024-11-08 09:56:50,081 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:56:50 WrapperNode [2024-11-08 09:56:50,081 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 09:56:50,083 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 09:56:50,083 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 09:56:50,083 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 09:56:50,091 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:56:50" (1/1) ... [2024-11-08 09:56:50,098 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:56:50" (1/1) ... [2024-11-08 09:56:50,118 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2024-11-08 09:56:50,120 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 09:56:50,121 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 09:56:50,121 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 09:56:50,121 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 09:56:50,130 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:56:50" (1/1) ... [2024-11-08 09:56:50,130 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:56:50" (1/1) ... [2024-11-08 09:56:50,132 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:56:50" (1/1) ... [2024-11-08 09:56:50,154 INFO L175 MemorySlicer]: Split 16 memory accesses to 4 slices as follows [2, 7, 3, 4]. 44 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0]. The 3 writes are split as follows [0, 0, 2, 1]. [2024-11-08 09:56:50,154 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:56:50" (1/1) ... [2024-11-08 09:56:50,155 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:56:50" (1/1) ... [2024-11-08 09:56:50,160 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:56:50" (1/1) ... [2024-11-08 09:56:50,164 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:56:50" (1/1) ... [2024-11-08 09:56:50,165 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:56:50" (1/1) ... [2024-11-08 09:56:50,166 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:56:50" (1/1) ... [2024-11-08 09:56:50,168 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 09:56:50,169 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 09:56:50,170 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 09:56:50,170 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 09:56:50,171 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:56:50" (1/1) ... [2024-11-08 09:56:50,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 09:56:50,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:56:50,211 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 09:56:50,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 09:56:50,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 09:56:50,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 09:56:50,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 09:56:50,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 09:56:50,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-08 09:56:50,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 09:56:50,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 09:56:50,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 09:56:50,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-08 09:56:50,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 09:56:50,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 09:56:50,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 09:56:50,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 09:56:50,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 09:56:50,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 09:56:50,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-08 09:56:50,377 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 09:56:50,380 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 09:56:50,581 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-08 09:56:50,582 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 09:56:50,596 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 09:56:50,597 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-08 09:56:50,597 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 09:56:50 BoogieIcfgContainer [2024-11-08 09:56:50,597 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 09:56:50,599 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 09:56:50,600 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 09:56:50,602 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 09:56:50,603 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 09:56:49" (1/3) ... [2024-11-08 09:56:50,603 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a623c45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 09:56:50, skipping insertion in model container [2024-11-08 09:56:50,603 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:56:50" (2/3) ... [2024-11-08 09:56:50,604 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a623c45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 09:56:50, skipping insertion in model container [2024-11-08 09:56:50,604 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 09:56:50" (3/3) ... [2024-11-08 09:56:50,605 INFO L112 eAbstractionObserver]: Analyzing ICFG tcpy.c [2024-11-08 09:56:50,619 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 09:56:50,619 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 09:56:50,675 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 09:56:50,682 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;@41bf493c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 09:56:50,682 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 09:56:50,687 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:50,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-08 09:56:50,693 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:56:50,694 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:56:50,696 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:56:50,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:56:50,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1608152958, now seen corresponding path program 1 times [2024-11-08 09:56:50,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:56:50,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748678445] [2024-11-08 09:56:50,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:56:50,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:56:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:56:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:56:50,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:56:50,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748678445] [2024-11-08 09:56:50,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748678445] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 09:56:50,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 09:56:50,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 09:56:50,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181733175] [2024-11-08 09:56:50,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:56:50,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 09:56:50,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:56:50,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 09:56:50,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 09:56:50,951 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:50,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:56:50,963 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2024-11-08 09:56:50,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 09:56:50,964 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-08 09:56:50,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:56:50,970 INFO L225 Difference]: With dead ends: 39 [2024-11-08 09:56:50,970 INFO L226 Difference]: Without dead ends: 17 [2024-11-08 09:56:50,973 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 [2024-11-08 09:56:50,976 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 09:56:50,977 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 09:56:50,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-08 09:56:51,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-08 09:56:51,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:51,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2024-11-08 09:56:51,004 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2024-11-08 09:56:51,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:56:51,004 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2024-11-08 09:56:51,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:51,005 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2024-11-08 09:56:51,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-08 09:56:51,006 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:56:51,006 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:56:51,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 09:56:51,007 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:56:51,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:56:51,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1873320706, now seen corresponding path program 1 times [2024-11-08 09:56:51,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:56:51,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805975201] [2024-11-08 09:56:51,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:56:51,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:56:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:56:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:56:51,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:56:51,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805975201] [2024-11-08 09:56:51,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805975201] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 09:56:51,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 09:56:51,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 09:56:51,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712816347] [2024-11-08 09:56:51,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:56:51,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 09:56:51,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:56:51,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 09:56:51,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 09:56:51,215 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:51,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:56:51,262 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2024-11-08 09:56:51,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 09:56:51,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-08 09:56:51,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:56:51,264 INFO L225 Difference]: With dead ends: 31 [2024-11-08 09:56:51,264 INFO L226 Difference]: Without dead ends: 19 [2024-11-08 09:56:51,265 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 [2024-11-08 09:56:51,266 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 09:56:51,267 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 09:56:51,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-08 09:56:51,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2024-11-08 09:56:51,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:51,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2024-11-08 09:56:51,273 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2024-11-08 09:56:51,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:56:51,273 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2024-11-08 09:56:51,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:51,274 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2024-11-08 09:56:51,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-08 09:56:51,274 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:56:51,274 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:56:51,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 09:56:51,275 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:56:51,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:56:51,275 INFO L85 PathProgramCache]: Analyzing trace with hash -270521828, now seen corresponding path program 1 times [2024-11-08 09:56:51,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:56:51,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094904139] [2024-11-08 09:56:51,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:56:51,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:56:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:56:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:56:51,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:56:51,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094904139] [2024-11-08 09:56:51,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094904139] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:56:51,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439834315] [2024-11-08 09:56:51,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:56:51,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:51,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:56:51,460 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:56:51,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 09:56:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:56:51,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-08 09:56:51,577 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:56:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:56:51,662 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:56:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:56:51,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439834315] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:56:51,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:56:51,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-08 09:56:51,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808580971] [2024-11-08 09:56:51,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:56:51,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 09:56:51,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:56:51,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 09:56:51,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-11-08 09:56:51,710 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:51,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:56:51,788 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2024-11-08 09:56:51,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 09:56:51,788 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-08 09:56:51,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:56:51,790 INFO L225 Difference]: With dead ends: 33 [2024-11-08 09:56:51,790 INFO L226 Difference]: Without dead ends: 21 [2024-11-08 09:56:51,791 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-11-08 09:56:51,792 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:56:51,794 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 32 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 09:56:51,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-08 09:56:51,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2024-11-08 09:56:51,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:51,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-11-08 09:56:51,800 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 14 [2024-11-08 09:56:51,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:56:51,800 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-11-08 09:56:51,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:51,801 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-11-08 09:56:51,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-08 09:56:51,801 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:56:51,801 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:56:51,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 09:56:52,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:52,006 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:56:52,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:56:52,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1874059334, now seen corresponding path program 2 times [2024-11-08 09:56:52,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:56:52,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702958025] [2024-11-08 09:56:52,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:56:52,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:56:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:56:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 09:56:52,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:56:52,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702958025] [2024-11-08 09:56:52,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702958025] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 09:56:52,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 09:56:52,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 09:56:52,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707991485] [2024-11-08 09:56:52,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:56:52,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 09:56:52,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:56:52,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 09:56:52,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-08 09:56:52,273 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:52,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:56:52,320 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2024-11-08 09:56:52,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 09:56:52,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-08 09:56:52,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:56:52,321 INFO L225 Difference]: With dead ends: 35 [2024-11-08 09:56:52,321 INFO L226 Difference]: Without dead ends: 28 [2024-11-08 09:56:52,322 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-08 09:56:52,323 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 09:56:52,323 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 17 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 09:56:52,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-08 09:56:52,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2024-11-08 09:56:52,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:52,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2024-11-08 09:56:52,332 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2024-11-08 09:56:52,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:56:52,333 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2024-11-08 09:56:52,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:52,333 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2024-11-08 09:56:52,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-08 09:56:52,334 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:56:52,335 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:56:52,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 09:56:52,335 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:56:52,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:56:52,337 INFO L85 PathProgramCache]: Analyzing trace with hash 265660728, now seen corresponding path program 1 times [2024-11-08 09:56:52,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:56:52,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531182605] [2024-11-08 09:56:52,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:56:52,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:56:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:56:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 09:56:52,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:56:52,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531182605] [2024-11-08 09:56:52,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531182605] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:56:52,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920207874] [2024-11-08 09:56:52,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:56:52,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:52,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:56:52,864 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:56:52,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 09:56:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:56:52,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-08 09:56:52,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:56:53,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2024-11-08 09:56:53,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 09:56:53,330 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:56:53,418 INFO L349 Elim1Store]: treesize reduction 10, result has 67.7 percent of original size [2024-11-08 09:56:53,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 46 [2024-11-08 09:56:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 09:56:53,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920207874] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:56:53,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:56:53,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 6] total 17 [2024-11-08 09:56:53,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601203133] [2024-11-08 09:56:53,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:56:53,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 09:56:53,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:56:53,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 09:56:53,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-11-08 09:56:53,449 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:53,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:56:53,696 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2024-11-08 09:56:53,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 09:56:53,696 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-08 09:56:53,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:56:53,698 INFO L225 Difference]: With dead ends: 28 [2024-11-08 09:56:53,699 INFO L226 Difference]: Without dead ends: 26 [2024-11-08 09:56:53,700 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2024-11-08 09:56:53,701 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:56:53,701 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 42 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 09:56:53,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-08 09:56:53,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2024-11-08 09:56:53,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:53,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-11-08 09:56:53,711 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2024-11-08 09:56:53,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:56:53,711 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-11-08 09:56:53,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:53,712 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-11-08 09:56:53,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-08 09:56:53,712 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:56:53,712 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:56:53,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 09:56:53,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:53,917 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:56:53,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:56:53,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1994055598, now seen corresponding path program 1 times [2024-11-08 09:56:53,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:56:53,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227640960] [2024-11-08 09:56:53,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:56:53,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:56:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:56:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:56:54,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:56:54,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227640960] [2024-11-08 09:56:54,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227640960] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:56:54,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462281477] [2024-11-08 09:56:54,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:56:54,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:54,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:56:54,455 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:56:54,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 09:56:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:56:54,528 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-08 09:56:54,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:56:54,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 09:56:54,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 25 [2024-11-08 09:56:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:56:54,851 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:56:54,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 51 [2024-11-08 09:56:54,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 98 [2024-11-08 09:56:55,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:56:55,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462281477] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:56:55,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:56:55,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 32 [2024-11-08 09:56:55,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950212234] [2024-11-08 09:56:55,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:56:55,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-08 09:56:55,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:56:55,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-08 09:56:55,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2024-11-08 09:56:55,230 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:55,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:56:55,851 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2024-11-08 09:56:55,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-08 09:56:55,851 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-08 09:56:55,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:56:55,852 INFO L225 Difference]: With dead ends: 82 [2024-11-08 09:56:55,852 INFO L226 Difference]: Without dead ends: 71 [2024-11-08 09:56:55,853 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=461, Invalid=1701, Unknown=0, NotChecked=0, Total=2162 [2024-11-08 09:56:55,854 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 165 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 09:56:55,854 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 127 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 09:56:55,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-08 09:56:55,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 44. [2024-11-08 09:56:55,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:55,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2024-11-08 09:56:55,864 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 22 [2024-11-08 09:56:55,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:56:55,864 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2024-11-08 09:56:55,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:55,864 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2024-11-08 09:56:55,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-08 09:56:55,865 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:56:55,865 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:56:55,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 09:56:56,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:56,066 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:56:56,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:56:56,067 INFO L85 PathProgramCache]: Analyzing trace with hash -757863644, now seen corresponding path program 2 times [2024-11-08 09:56:56,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:56:56,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207144359] [2024-11-08 09:56:56,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:56:56,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:56:56,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:56:56,203 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 09:56:56,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:56:56,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207144359] [2024-11-08 09:56:56,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207144359] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:56:56,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921261062] [2024-11-08 09:56:56,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 09:56:56,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:56,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:56:56,206 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:56:56,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 09:56:56,278 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 09:56:56,278 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:56:56,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 09:56:56,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:56:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 09:56:56,381 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:56:56,455 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 09:56:56,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921261062] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:56:56,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:56:56,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-08 09:56:56,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113878163] [2024-11-08 09:56:56,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:56:56,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 09:56:56,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:56:56,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 09:56:56,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-08 09:56:56,457 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:56,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:56:56,592 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2024-11-08 09:56:56,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 09:56:56,593 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-08 09:56:56,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:56:56,594 INFO L225 Difference]: With dead ends: 86 [2024-11-08 09:56:56,594 INFO L226 Difference]: Without dead ends: 64 [2024-11-08 09:56:56,594 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-11-08 09:56:56,595 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:56:56,595 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 65 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 09:56:56,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-08 09:56:56,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 38. [2024-11-08 09:56:56,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:56,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2024-11-08 09:56:56,603 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 26 [2024-11-08 09:56:56,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:56:56,603 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2024-11-08 09:56:56,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:56,603 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2024-11-08 09:56:56,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-08 09:56:56,604 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:56:56,604 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:56:56,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 09:56:56,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:56,805 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:56:56,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:56:56,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1750966422, now seen corresponding path program 3 times [2024-11-08 09:56:56,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:56:56,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594194328] [2024-11-08 09:56:56,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:56:56,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:56:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:56:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 09:56:57,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:56:57,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594194328] [2024-11-08 09:56:57,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594194328] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:56:57,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154075859] [2024-11-08 09:56:57,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 09:56:57,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:57,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:56:57,099 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:56:57,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 09:56:57,168 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-08 09:56:57,168 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:56:57,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-08 09:56:57,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:56:57,310 INFO L349 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2024-11-08 09:56:57,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 44 [2024-11-08 09:56:57,702 INFO L349 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2024-11-08 09:56:57,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 51 [2024-11-08 09:56:57,709 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 09:56:57,711 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:56:57,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 20 [2024-11-08 09:56:57,728 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 09:56:57,728 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:56:58,006 INFO L349 Elim1Store]: treesize reduction 10, result has 67.7 percent of original size [2024-11-08 09:56:58,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 48 [2024-11-08 09:56:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 09:56:58,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154075859] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:56:58,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:56:58,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 30 [2024-11-08 09:56:58,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821991972] [2024-11-08 09:56:58,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:56:58,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-08 09:56:58,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:56:58,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-08 09:56:58,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2024-11-08 09:56:58,239 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:59,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:56:59,262 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2024-11-08 09:56:59,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-08 09:56:59,263 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-08 09:56:59,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:56:59,263 INFO L225 Difference]: With dead ends: 76 [2024-11-08 09:56:59,263 INFO L226 Difference]: Without dead ends: 62 [2024-11-08 09:56:59,264 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=497, Invalid=2053, Unknown=0, NotChecked=0, Total=2550 [2024-11-08 09:56:59,265 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 176 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 09:56:59,265 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 122 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 09:56:59,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-08 09:56:59,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 31. [2024-11-08 09:56:59,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:59,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2024-11-08 09:56:59,274 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2024-11-08 09:56:59,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:56:59,274 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2024-11-08 09:56:59,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:59,274 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2024-11-08 09:56:59,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-08 09:56:59,275 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:56:59,275 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:56:59,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 09:56:59,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:59,476 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:56:59,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:56:59,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1654454336, now seen corresponding path program 4 times [2024-11-08 09:56:59,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:56:59,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745586382] [2024-11-08 09:56:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:56:59,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:56:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:56:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 09:56:59,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:56:59,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745586382] [2024-11-08 09:56:59,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745586382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:56:59,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810825366] [2024-11-08 09:56:59,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 09:56:59,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:59,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:56:59,732 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:56:59,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 09:56:59,792 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 09:56:59,792 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:56:59,793 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-08 09:56:59,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:56:59,866 INFO L349 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2024-11-08 09:56:59,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2024-11-08 09:57:00,227 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 09:57:00,228 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:57:00,498 INFO L349 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2024-11-08 09:57:00,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 36 [2024-11-08 09:57:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 09:57:00,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810825366] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:57:00,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:57:00,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 33 [2024-11-08 09:57:00,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517832067] [2024-11-08 09:57:00,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:57:00,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-08 09:57:00,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:57:00,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-08 09:57:00,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2024-11-08 09:57:00,636 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:01,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:57:01,694 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2024-11-08 09:57:01,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-08 09:57:01,694 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-08 09:57:01,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:57:01,695 INFO L225 Difference]: With dead ends: 122 [2024-11-08 09:57:01,695 INFO L226 Difference]: Without dead ends: 95 [2024-11-08 09:57:01,696 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=776, Invalid=2884, Unknown=0, NotChecked=0, Total=3660 [2024-11-08 09:57:01,697 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 377 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 09:57:01,697 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 166 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 09:57:01,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-08 09:57:01,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 57. [2024-11-08 09:57:01,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 56 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:01,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2024-11-08 09:57:01,712 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 30 [2024-11-08 09:57:01,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:57:01,713 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2024-11-08 09:57:01,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:01,713 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2024-11-08 09:57:01,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-08 09:57:01,714 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:57:01,714 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:57:01,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 09:57:01,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:57:01,915 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:57:01,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:57:01,915 INFO L85 PathProgramCache]: Analyzing trace with hash -837130924, now seen corresponding path program 5 times [2024-11-08 09:57:01,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:57:01,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170067837] [2024-11-08 09:57:01,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:57:01,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:57:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:57:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:57:03,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:57:03,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170067837] [2024-11-08 09:57:03,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170067837] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:57:03,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3119460] [2024-11-08 09:57:03,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 09:57:03,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:57:03,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:57:03,017 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:57:03,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 09:57:03,133 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-08 09:57:03,133 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:57:03,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-08 09:57:03,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:57:03,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:03,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2024-11-08 09:57:03,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:03,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:03,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:03,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:03,413 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:57:03,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 79 [2024-11-08 09:57:04,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:04,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:04,020 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 09:57:04,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:04,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:04,025 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:57:04,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 105 treesize of output 70 [2024-11-08 09:57:04,030 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 09:57:04,032 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:57:04,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 20 [2024-11-08 09:57:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:57:04,051 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:57:04,379 INFO L349 Elim1Store]: treesize reduction 56, result has 34.1 percent of original size [2024-11-08 09:57:04,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 75 [2024-11-08 09:57:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:57:04,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3119460] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:57:04,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:57:04,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 47 [2024-11-08 09:57:04,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066671474] [2024-11-08 09:57:04,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:57:04,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-08 09:57:04,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:57:04,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-08 09:57:04,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1787, Unknown=0, NotChecked=0, Total=2162 [2024-11-08 09:57:04,770 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:06,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:57:06,014 INFO L93 Difference]: Finished difference Result 190 states and 203 transitions. [2024-11-08 09:57:06,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-08 09:57:06,015 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-08 09:57:06,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:57:06,016 INFO L225 Difference]: With dead ends: 190 [2024-11-08 09:57:06,016 INFO L226 Difference]: Without dead ends: 130 [2024-11-08 09:57:06,018 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=924, Invalid=3768, Unknown=0, NotChecked=0, Total=4692 [2024-11-08 09:57:06,018 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 236 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 09:57:06,019 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 196 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 09:57:06,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-08 09:57:06,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 89. [2024-11-08 09:57:06,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.1022727272727273) internal successors, (97), 88 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:06,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2024-11-08 09:57:06,052 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 36 [2024-11-08 09:57:06,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:57:06,052 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2024-11-08 09:57:06,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:06,053 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2024-11-08 09:57:06,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-08 09:57:06,054 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:57:06,054 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:57:06,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 09:57:06,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:57:06,255 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:57:06,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:57:06,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1997951096, now seen corresponding path program 6 times [2024-11-08 09:57:06,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:57:06,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962195899] [2024-11-08 09:57:06,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:57:06,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:57:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:57:06,674 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 09:57:06,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:57:06,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962195899] [2024-11-08 09:57:06,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962195899] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:57:06,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569009154] [2024-11-08 09:57:06,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 09:57:06,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:57:06,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:57:06,678 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:57:06,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 09:57:06,775 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-08 09:57:06,776 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:57:06,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-08 09:57:06,781 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:57:07,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:07,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2024-11-08 09:57:07,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:07,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:07,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:07,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:07,117 INFO L349 Elim1Store]: treesize reduction 53, result has 26.4 percent of original size [2024-11-08 09:57:07,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 77 [2024-11-08 09:57:07,729 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-08 09:57:07,730 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:57:08,173 INFO L349 Elim1Store]: treesize reduction 58, result has 49.6 percent of original size [2024-11-08 09:57:08,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 99 treesize of output 106 [2024-11-08 09:57:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-08 09:57:08,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569009154] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:57:08,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:57:08,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 13] total 40 [2024-11-08 09:57:08,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688289564] [2024-11-08 09:57:08,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:57:08,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-08 09:57:08,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:57:08,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-08 09:57:08,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2024-11-08 09:57:08,424 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand has 40 states, 40 states have (on average 2.175) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:10,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:57:10,375 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2024-11-08 09:57:10,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-08 09:57:10,376 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-11-08 09:57:10,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:57:10,376 INFO L225 Difference]: With dead ends: 143 [2024-11-08 09:57:10,377 INFO L226 Difference]: Without dead ends: 99 [2024-11-08 09:57:10,378 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=969, Invalid=5193, Unknown=0, NotChecked=0, Total=6162 [2024-11-08 09:57:10,379 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 307 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 09:57:10,380 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 207 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 09:57:10,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-08 09:57:10,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 58. [2024-11-08 09:57:10,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:10,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2024-11-08 09:57:10,398 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 38 [2024-11-08 09:57:10,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:57:10,398 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2024-11-08 09:57:10,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:10,398 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2024-11-08 09:57:10,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-08 09:57:10,399 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:57:10,399 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:57:10,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-08 09:57:10,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-08 09:57:10,604 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:57:10,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:57:10,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1568254992, now seen corresponding path program 7 times [2024-11-08 09:57:10,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:57:10,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290631056] [2024-11-08 09:57:10,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:57:10,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:57:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:57:10,984 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 09:57:10,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:57:10,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290631056] [2024-11-08 09:57:10,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290631056] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:57:10,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41683881] [2024-11-08 09:57:10,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 09:57:10,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:57:10,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:57:10,987 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:57:10,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 09:57:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:57:11,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-08 09:57:11,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:57:11,315 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 09:57:11,315 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:57:11,724 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 09:57:11,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41683881] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:57:11,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:57:11,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2024-11-08 09:57:11,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129719723] [2024-11-08 09:57:11,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:57:11,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-08 09:57:11,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:57:11,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-08 09:57:11,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2024-11-08 09:57:11,726 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:12,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:57:12,029 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2024-11-08 09:57:12,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-08 09:57:12,030 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-08 09:57:12,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:57:12,032 INFO L225 Difference]: With dead ends: 79 [2024-11-08 09:57:12,032 INFO L226 Difference]: Without dead ends: 62 [2024-11-08 09:57:12,033 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=531, Invalid=1361, Unknown=0, NotChecked=0, Total=1892 [2024-11-08 09:57:12,033 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 112 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 09:57:12,033 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 133 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 09:57:12,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-08 09:57:12,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 43. [2024-11-08 09:57:12,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 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) [2024-11-08 09:57:12,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2024-11-08 09:57:12,053 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 40 [2024-11-08 09:57:12,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:57:12,055 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2024-11-08 09:57:12,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:12,055 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2024-11-08 09:57:12,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-08 09:57:12,056 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:57:12,056 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:57:12,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-08 09:57:12,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:57:12,262 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:57:12,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:57:12,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1640463246, now seen corresponding path program 8 times [2024-11-08 09:57:12,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:57:12,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908383017] [2024-11-08 09:57:12,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:57:12,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:57:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:57:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:57:13,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:57:13,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908383017] [2024-11-08 09:57:13,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908383017] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:57:13,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805170947] [2024-11-08 09:57:13,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 09:57:13,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:57:13,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:57:13,086 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:57:13,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 09:57:13,188 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 09:57:13,188 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:57:13,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-08 09:57:13,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:57:13,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 09:57:13,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 09:57:13,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 09:57:13,600 INFO L349 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2024-11-08 09:57:13,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 44 [2024-11-08 09:57:14,210 INFO L349 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2024-11-08 09:57:14,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 51 [2024-11-08 09:57:14,214 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 09:57:14,215 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:57:14,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 20 [2024-11-08 09:57:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:57:14,241 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:57:14,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 51 [2024-11-08 09:57:14,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 98 [2024-11-08 09:57:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:57:15,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805170947] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:57:15,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:57:15,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 60 [2024-11-08 09:57:15,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995267328] [2024-11-08 09:57:15,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:57:15,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-08 09:57:15,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:57:15,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-08 09:57:15,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=3068, Unknown=0, NotChecked=0, Total=3540 [2024-11-08 09:57:15,297 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:17,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:57:17,750 INFO L93 Difference]: Finished difference Result 135 states and 145 transitions. [2024-11-08 09:57:17,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-08 09:57:17,750 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-11-08 09:57:17,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:57:17,752 INFO L225 Difference]: With dead ends: 135 [2024-11-08 09:57:17,752 INFO L226 Difference]: Without dead ends: 116 [2024-11-08 09:57:17,754 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1615, Invalid=9515, Unknown=0, NotChecked=0, Total=11130 [2024-11-08 09:57:17,755 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 539 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 09:57:17,755 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 378 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 09:57:17,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-08 09:57:17,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 59. [2024-11-08 09:57:17,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2024-11-08 09:57:17,776 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 42 [2024-11-08 09:57:17,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:57:17,776 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2024-11-08 09:57:17,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:17,777 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2024-11-08 09:57:17,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-08 09:57:17,777 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:57:17,777 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:57:17,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-08 09:57:17,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-08 09:57:17,978 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:57:17,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:57:17,978 INFO L85 PathProgramCache]: Analyzing trace with hash -61892860, now seen corresponding path program 9 times [2024-11-08 09:57:17,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:57:17,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281396863] [2024-11-08 09:57:17,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:57:17,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:57:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:57:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 1 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:57:19,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:57:19,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281396863] [2024-11-08 09:57:19,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281396863] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:57:19,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704800835] [2024-11-08 09:57:19,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 09:57:19,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:57:19,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:57:19,273 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:57:19,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 09:57:19,415 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-08 09:57:19,415 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:57:19,418 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-08 09:57:19,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:57:19,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-08 09:57:19,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-08 09:57:19,615 INFO L349 Elim1Store]: treesize reduction 26, result has 43.5 percent of original size [2024-11-08 09:57:19,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2024-11-08 09:57:19,725 INFO L349 Elim1Store]: treesize reduction 84, result has 33.3 percent of original size [2024-11-08 09:57:19,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 67 treesize of output 73 [2024-11-08 09:57:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 41 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-08 09:57:20,396 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:57:20,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 91 [2024-11-08 09:57:20,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3726 treesize of output 3694 [2024-11-08 09:57:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-08 09:57:21,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704800835] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:57:21,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:57:21,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 16] total 54 [2024-11-08 09:57:21,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492302825] [2024-11-08 09:57:21,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:57:21,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-08 09:57:21,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:57:21,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-08 09:57:21,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=2556, Unknown=0, NotChecked=0, Total=2862 [2024-11-08 09:57:21,201 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 54 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:25,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:57:25,050 INFO L93 Difference]: Finished difference Result 160 states and 169 transitions. [2024-11-08 09:57:25,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-11-08 09:57:25,051 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 54 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-08 09:57:25,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:57:25,051 INFO L225 Difference]: With dead ends: 160 [2024-11-08 09:57:25,051 INFO L226 Difference]: Without dead ends: 158 [2024-11-08 09:57:25,054 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4373 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2282, Invalid=13218, Unknown=0, NotChecked=0, Total=15500 [2024-11-08 09:57:25,055 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 491 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-08 09:57:25,055 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 348 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1393 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-08 09:57:25,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-08 09:57:25,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 72. [2024-11-08 09:57:25,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 71 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:25,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2024-11-08 09:57:25,078 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 46 [2024-11-08 09:57:25,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:57:25,078 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2024-11-08 09:57:25,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 54 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:25,078 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2024-11-08 09:57:25,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-08 09:57:25,079 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:57:25,079 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:57:25,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-08 09:57:25,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 09:57:25,280 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:57:25,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:57:25,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1781463174, now seen corresponding path program 10 times [2024-11-08 09:57:25,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:57:25,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042223378] [2024-11-08 09:57:25,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:57:25,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:57:25,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:57:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 1 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:57:26,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:57:26,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042223378] [2024-11-08 09:57:26,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042223378] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:57:26,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200824020] [2024-11-08 09:57:26,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 09:57:26,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:57:26,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:57:26,587 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:57:26,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 09:57:26,683 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 09:57:26,683 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:57:26,685 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-08 09:57:26,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:57:26,785 INFO L349 Elim1Store]: treesize reduction 41, result has 39.7 percent of original size [2024-11-08 09:57:26,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 47 [2024-11-08 09:57:26,884 INFO L349 Elim1Store]: treesize reduction 124, result has 30.3 percent of original size [2024-11-08 09:57:26,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 99 [2024-11-08 09:57:27,036 INFO L349 Elim1Store]: treesize reduction 241, result has 25.2 percent of original size [2024-11-08 09:57:27,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 141 treesize of output 153 [2024-11-08 09:57:28,679 INFO L349 Elim1Store]: treesize reduction 94, result has 3.1 percent of original size [2024-11-08 09:57:28,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 181 treesize of output 111 [2024-11-08 09:57:28,686 INFO L349 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2024-11-08 09:57:28,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 20 [2024-11-08 09:57:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-08 09:57:28,716 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:57:29,470 INFO L349 Elim1Store]: treesize reduction 30, result has 81.6 percent of original size [2024-11-08 09:57:29,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 133 treesize of output 198 [2024-11-08 09:57:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-08 09:57:29,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200824020] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:57:29,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:57:29,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 17] total 55 [2024-11-08 09:57:29,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521708829] [2024-11-08 09:57:29,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:57:29,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-08 09:57:29,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:57:29,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-08 09:57:29,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=2599, Unknown=0, NotChecked=0, Total=2970 [2024-11-08 09:57:29,571 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:40,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:57:40,317 INFO L93 Difference]: Finished difference Result 186 states and 202 transitions. [2024-11-08 09:57:40,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-11-08 09:57:40,317 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 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 50 [2024-11-08 09:57:40,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:57:40,318 INFO L225 Difference]: With dead ends: 186 [2024-11-08 09:57:40,318 INFO L226 Difference]: Without dead ends: 144 [2024-11-08 09:57:40,319 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3987 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=2859, Invalid=12147, Unknown=0, NotChecked=0, Total=15006 [2024-11-08 09:57:40,320 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 340 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:57:40,320 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 432 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1386 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-08 09:57:40,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-08 09:57:40,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 91. [2024-11-08 09:57:40,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0777777777777777) internal successors, (97), 90 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:40,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2024-11-08 09:57:40,357 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 50 [2024-11-08 09:57:40,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:57:40,357 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2024-11-08 09:57:40,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:40,358 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2024-11-08 09:57:40,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-08 09:57:40,358 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:57:40,358 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:57:40,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-08 09:57:40,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-08 09:57:40,559 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:57:40,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:57:40,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1225405030, now seen corresponding path program 11 times [2024-11-08 09:57:40,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:57:40,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159367523] [2024-11-08 09:57:40,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:57:40,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:57:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:57:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-08 09:57:41,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:57:41,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159367523] [2024-11-08 09:57:41,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159367523] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:57:41,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652124577] [2024-11-08 09:57:41,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 09:57:41,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:57:41,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:57:41,223 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:57:41,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 09:57:41,900 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-08 09:57:41,900 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:57:41,903 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-08 09:57:41,904 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:57:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-08 09:57:42,228 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:57:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-08 09:57:42,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652124577] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:57:42,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:57:42,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 52 [2024-11-08 09:57:42,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988075570] [2024-11-08 09:57:42,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:57:42,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-08 09:57:42,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:57:42,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-08 09:57:42,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=2077, Unknown=0, NotChecked=0, Total=2652 [2024-11-08 09:57:42,740 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand has 52 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 52 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:43,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:57:43,395 INFO L93 Difference]: Finished difference Result 330 states and 352 transitions. [2024-11-08 09:57:43,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-08 09:57:43,396 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 52 states have internal predecessors, (107), 0 states have call successors, (0), 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 56 [2024-11-08 09:57:43,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:57:43,397 INFO L225 Difference]: With dead ends: 330 [2024-11-08 09:57:43,397 INFO L226 Difference]: Without dead ends: 256 [2024-11-08 09:57:43,398 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1043, Invalid=3247, Unknown=0, NotChecked=0, Total=4290 [2024-11-08 09:57:43,398 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 257 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 09:57:43,399 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 241 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 09:57:43,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-11-08 09:57:43,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 121. [2024-11-08 09:57:43,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.1333333333333333) internal successors, (136), 120 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:43,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 136 transitions. [2024-11-08 09:57:43,460 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 136 transitions. Word has length 56 [2024-11-08 09:57:43,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:57:43,460 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 136 transitions. [2024-11-08 09:57:43,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 52 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:43,460 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 136 transitions. [2024-11-08 09:57:43,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-08 09:57:43,461 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:57:43,461 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:57:43,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-08 09:57:43,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-08 09:57:43,662 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:57:43,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:57:43,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1822181206, now seen corresponding path program 12 times [2024-11-08 09:57:43,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:57:43,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615204499] [2024-11-08 09:57:43,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:57:43,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:57:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:57:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 1 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:57:45,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:57:45,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615204499] [2024-11-08 09:57:45,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615204499] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:57:45,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353983928] [2024-11-08 09:57:45,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 09:57:45,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:57:45,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:57:45,446 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:57:45,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 09:57:45,988 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-08 09:57:45,989 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:57:45,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-08 09:57:45,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:57:46,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:46,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2024-11-08 09:57:46,453 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:57:46,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 51 [2024-11-08 09:57:46,575 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:57:46,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 79 [2024-11-08 09:57:47,561 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:57:47,561 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:57:48,331 INFO L349 Elim1Store]: treesize reduction 30, result has 81.6 percent of original size [2024-11-08 09:57:48,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 133 treesize of output 198 [2024-11-08 09:57:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 6 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:57:49,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353983928] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:57:49,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:57:49,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 78 [2024-11-08 09:57:49,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283571623] [2024-11-08 09:57:49,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:57:49,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-11-08 09:57:49,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:57:49,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-11-08 09:57:49,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=620, Invalid=5386, Unknown=0, NotChecked=0, Total=6006 [2024-11-08 09:57:49,101 INFO L87 Difference]: Start difference. First operand 121 states and 136 transitions. Second operand has 78 states, 78 states have (on average 2.1538461538461537) internal successors, (168), 78 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:54,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:57:54,445 INFO L93 Difference]: Finished difference Result 416 states and 442 transitions. [2024-11-08 09:57:54,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2024-11-08 09:57:54,445 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.1538461538461537) internal successors, (168), 78 states have internal predecessors, (168), 0 states have call successors, (0), 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 60 [2024-11-08 09:57:54,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:57:54,447 INFO L225 Difference]: With dead ends: 416 [2024-11-08 09:57:54,447 INFO L226 Difference]: Without dead ends: 358 [2024-11-08 09:57:54,449 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7471 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=2357, Invalid=23725, Unknown=0, NotChecked=0, Total=26082 [2024-11-08 09:57:54,450 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 487 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 2353 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 2517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-08 09:57:54,450 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 779 Invalid, 2517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2353 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-08 09:57:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2024-11-08 09:57:54,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 168. [2024-11-08 09:57:54,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.1197604790419162) internal successors, (187), 167 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:54,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 187 transitions. [2024-11-08 09:57:54,520 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 187 transitions. Word has length 60 [2024-11-08 09:57:54,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:57:54,521 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 187 transitions. [2024-11-08 09:57:54,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.1538461538461537) internal successors, (168), 78 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:54,521 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 187 transitions. [2024-11-08 09:57:54,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-08 09:57:54,521 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:57:54,521 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:57:54,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-08 09:57:54,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:57:54,722 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:57:54,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:57:54,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1561323040, now seen corresponding path program 13 times [2024-11-08 09:57:54,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:57:54,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931440876] [2024-11-08 09:57:54,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:57:54,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:57:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:57:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 1 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:57:56,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:57:56,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931440876] [2024-11-08 09:57:56,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931440876] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:57:56,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072812106] [2024-11-08 09:57:56,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 09:57:56,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:57:56,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:57:56,683 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:57:56,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-08 09:57:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:57:56,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-08 09:57:56,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:57:56,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 09:57:56,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 23 [2024-11-08 09:57:57,053 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:57:57,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 51 [2024-11-08 09:57:57,180 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:57:57,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 79 [2024-11-08 09:57:57,324 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:57:57,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 107 [2024-11-08 09:57:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:57:58,504 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:57:59,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 171 [2024-11-08 09:57:59,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16406694 treesize of output 16398502 [2024-11-08 09:58:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 12 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:58:00,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072812106] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:58:00,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:58:00,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31, 32] total 76 [2024-11-08 09:58:00,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105627262] [2024-11-08 09:58:00,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:58:00,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-08 09:58:00,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:58:00,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-08 09:58:00,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=4876, Unknown=0, NotChecked=0, Total=5700 [2024-11-08 09:58:00,245 INFO L87 Difference]: Start difference. First operand 168 states and 187 transitions. Second operand has 76 states, 76 states have (on average 2.210526315789474) internal successors, (168), 76 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:58:05,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:58:05,447 INFO L93 Difference]: Finished difference Result 450 states and 479 transitions. [2024-11-08 09:58:05,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-08 09:58:05,448 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.210526315789474) internal successors, (168), 76 states have internal predecessors, (168), 0 states have call successors, (0), 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 64 [2024-11-08 09:58:05,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:58:05,449 INFO L225 Difference]: With dead ends: 450 [2024-11-08 09:58:05,449 INFO L226 Difference]: Without dead ends: 448 [2024-11-08 09:58:05,451 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6109 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4041, Invalid=18011, Unknown=0, NotChecked=0, Total=22052 [2024-11-08 09:58:05,451 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 710 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 2198 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 2413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 2198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-08 09:58:05,451 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [710 Valid, 848 Invalid, 2413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 2198 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-08 09:58:05,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2024-11-08 09:58:05,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 252. [2024-11-08 09:58:05,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.1274900398406376) internal successors, (283), 251 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:58:05,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 283 transitions. [2024-11-08 09:58:05,587 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 283 transitions. Word has length 64 [2024-11-08 09:58:05,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:58:05,587 INFO L471 AbstractCegarLoop]: Abstraction has 252 states and 283 transitions. [2024-11-08 09:58:05,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.210526315789474) internal successors, (168), 76 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:58:05,587 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 283 transitions. [2024-11-08 09:58:05,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-08 09:58:05,588 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:58:05,588 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 7, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:58:05,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-08 09:58:05,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 09:58:05,789 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:58:05,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:58:05,789 INFO L85 PathProgramCache]: Analyzing trace with hash -515203708, now seen corresponding path program 14 times [2024-11-08 09:58:05,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:58:05,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335948019] [2024-11-08 09:58:05,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:58:05,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:58:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:58:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 81 proven. 56 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-08 09:58:06,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:58:06,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335948019] [2024-11-08 09:58:06,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335948019] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:58:06,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043302613] [2024-11-08 09:58:06,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 09:58:06,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:58:06,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:58:06,363 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:58:06,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-08 09:58:06,505 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 09:58:06,506 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:58:06,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-08 09:58:06,508 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:58:06,876 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 64 proven. 67 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-08 09:58:06,876 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:58:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 115 proven. 16 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-08 09:58:07,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043302613] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:58:07,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:58:07,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 52 [2024-11-08 09:58:07,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399987155] [2024-11-08 09:58:07,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:58:07,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-08 09:58:07,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:58:07,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-08 09:58:07,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=2061, Unknown=0, NotChecked=0, Total=2652 [2024-11-08 09:58:07,503 INFO L87 Difference]: Start difference. First operand 252 states and 283 transitions. Second operand has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 52 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:58:08,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:58:08,969 INFO L93 Difference]: Finished difference Result 456 states and 493 transitions. [2024-11-08 09:58:08,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-08 09:58:08,970 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 52 states have internal predecessors, (111), 0 states have call successors, (0), 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 66 [2024-11-08 09:58:08,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:58:08,971 INFO L225 Difference]: With dead ends: 456 [2024-11-08 09:58:08,972 INFO L226 Difference]: Without dead ends: 374 [2024-11-08 09:58:08,973 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1807, Invalid=5675, Unknown=0, NotChecked=0, Total=7482 [2024-11-08 09:58:08,973 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 324 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-08 09:58:08,973 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 711 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-08 09:58:08,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2024-11-08 09:58:09,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 228. [2024-11-08 09:58:09,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.079295154185022) internal successors, (245), 227 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:58:09,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 245 transitions. [2024-11-08 09:58:09,094 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 245 transitions. Word has length 66 [2024-11-08 09:58:09,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:58:09,094 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 245 transitions. [2024-11-08 09:58:09,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 52 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:58:09,095 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 245 transitions. [2024-11-08 09:58:09,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-08 09:58:09,095 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:58:09,095 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:58:09,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-08 09:58:09,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:58:09,296 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:58:09,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:58:09,297 INFO L85 PathProgramCache]: Analyzing trace with hash -245602154, now seen corresponding path program 15 times [2024-11-08 09:58:09,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:58:09,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225886801] [2024-11-08 09:58:09,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:58:09,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:58:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:58:09,635 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 99 proven. 93 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 09:58:09,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:58:09,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225886801] [2024-11-08 09:58:09,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225886801] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:58:09,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381928816] [2024-11-08 09:58:09,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 09:58:09,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:58:09,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:58:09,638 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:58:09,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-08 09:58:09,918 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-08 09:58:09,919 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:58:09,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-08 09:58:09,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:58:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 128 proven. 64 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 09:58:10,163 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:58:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 128 proven. 64 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 09:58:10,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381928816] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:58:10,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:58:10,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2024-11-08 09:58:10,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340007584] [2024-11-08 09:58:10,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:58:10,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-08 09:58:10,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:58:10,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-08 09:58:10,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2024-11-08 09:58:10,354 INFO L87 Difference]: Start difference. First operand 228 states and 245 transitions. Second operand has 32 states, 32 states have (on average 3.25) internal successors, (104), 32 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:58:10,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:58:10,738 INFO L93 Difference]: Finished difference Result 341 states and 361 transitions. [2024-11-08 09:58:10,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-08 09:58:10,739 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.25) internal successors, (104), 32 states have internal predecessors, (104), 0 states have call successors, (0), 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 68 [2024-11-08 09:58:10,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:58:10,740 INFO L225 Difference]: With dead ends: 341 [2024-11-08 09:58:10,740 INFO L226 Difference]: Without dead ends: 289 [2024-11-08 09:58:10,740 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 107 SyntacticMatches, 18 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2024-11-08 09:58:10,741 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 163 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:58:10,741 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 131 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 09:58:10,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-08 09:58:10,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 225. [2024-11-08 09:58:10,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0758928571428572) internal successors, (241), 224 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:58:10,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 241 transitions. [2024-11-08 09:58:10,851 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 241 transitions. Word has length 68 [2024-11-08 09:58:10,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:58:10,851 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 241 transitions. [2024-11-08 09:58:10,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.25) internal successors, (104), 32 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:58:10,851 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 241 transitions. [2024-11-08 09:58:10,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-08 09:58:10,852 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:58:10,852 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:58:10,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-08 09:58:11,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:58:11,052 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:58:11,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:58:11,053 INFO L85 PathProgramCache]: Analyzing trace with hash -2027347456, now seen corresponding path program 16 times [2024-11-08 09:58:11,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:58:11,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736777147] [2024-11-08 09:58:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:58:11,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:58:11,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat