./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array13_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array13_pattern.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 78699f7813351c3df7f7fcab3bf98fffd7a92c5cc679034a9d139e9169232d7e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-10 22:12:59,676 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-10 22:12:59,745 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-10 22:12:59,749 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-10 22:12:59,750 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-10 22:12:59,783 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-10 22:12:59,784 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-10 22:12:59,784 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-10 22:12:59,788 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-10 22:12:59,788 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-10 22:12:59,788 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-10 22:12:59,789 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-10 22:12:59,789 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-10 22:12:59,790 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-10 22:12:59,790 INFO L153 SettingsManager]: * Use SBE=true [2024-10-10 22:12:59,791 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-10 22:12:59,791 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-10 22:12:59,792 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-10 22:12:59,792 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-10 22:12:59,793 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-10 22:12:59,793 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-10 22:12:59,797 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-10 22:12:59,797 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-10 22:12:59,797 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-10 22:12:59,797 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-10 22:12:59,798 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-10 22:12:59,798 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-10 22:12:59,798 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-10 22:12:59,799 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-10 22:12:59,799 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-10 22:12:59,799 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-10 22:12:59,799 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-10 22:12:59,800 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:12:59,800 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-10 22:12:59,800 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-10 22:12:59,801 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-10 22:12:59,801 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-10 22:12:59,801 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-10 22:12:59,801 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-10 22:12:59,802 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-10 22:12:59,802 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-10 22:12:59,803 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-10 22:12:59,803 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78699f7813351c3df7f7fcab3bf98fffd7a92c5cc679034a9d139e9169232d7e [2024-10-10 22:13:00,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-10 22:13:00,054 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-10 22:13:00,057 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-10 22:13:00,058 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-10 22:13:00,058 INFO L274 PluginConnector]: CDTParser initialized [2024-10-10 22:13:00,059 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array13_pattern.c [2024-10-10 22:13:01,481 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-10 22:13:01,680 INFO L384 CDTParser]: Found 1 translation units. [2024-10-10 22:13:01,680 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array13_pattern.c [2024-10-10 22:13:01,687 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/3f4f0369b/46d01397ee59480d8ec3dd90e9933835/FLAGbeb5fa149 [2024-10-10 22:13:01,704 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/3f4f0369b/46d01397ee59480d8ec3dd90e9933835 [2024-10-10 22:13:01,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-10 22:13:01,707 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-10 22:13:01,709 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-10 22:13:01,709 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-10 22:13:01,714 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-10 22:13:01,715 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:13:01" (1/1) ... [2024-10-10 22:13:01,716 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c37648e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:13:01, skipping insertion in model container [2024-10-10 22:13:01,716 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:13:01" (1/1) ... [2024-10-10 22:13:01,739 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-10 22:13:01,922 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array13_pattern.c[1342,1355] [2024-10-10 22:13:01,951 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:13:01,959 INFO L200 MainTranslator]: Completed pre-run [2024-10-10 22:13:01,971 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array13_pattern.c[1342,1355] [2024-10-10 22:13:01,985 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:13:02,006 INFO L204 MainTranslator]: Completed translation [2024-10-10 22:13:02,007 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:13:02 WrapperNode [2024-10-10 22:13:02,007 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-10 22:13:02,008 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-10 22:13:02,009 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-10 22:13:02,009 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-10 22:13:02,015 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:13:02" (1/1) ... [2024-10-10 22:13:02,026 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:13:02" (1/1) ... [2024-10-10 22:13:02,050 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 97 [2024-10-10 22:13:02,052 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-10 22:13:02,053 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-10 22:13:02,053 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-10 22:13:02,053 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-10 22:13:02,062 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:13:02" (1/1) ... [2024-10-10 22:13:02,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:13:02" (1/1) ... [2024-10-10 22:13:02,065 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:13:02" (1/1) ... [2024-10-10 22:13:02,077 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-10 22:13:02,078 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:13:02" (1/1) ... [2024-10-10 22:13:02,078 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:13:02" (1/1) ... [2024-10-10 22:13:02,089 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:13:02" (1/1) ... [2024-10-10 22:13:02,093 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:13:02" (1/1) ... [2024-10-10 22:13:02,094 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:13:02" (1/1) ... [2024-10-10 22:13:02,095 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:13:02" (1/1) ... [2024-10-10 22:13:02,097 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-10 22:13:02,100 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-10 22:13:02,100 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-10 22:13:02,100 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-10 22:13:02,101 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:13:02" (1/1) ... [2024-10-10 22:13:02,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:13:02,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:13:02,131 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-10 22:13:02,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-10 22:13:02,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-10 22:13:02,188 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-10 22:13:02,188 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-10 22:13:02,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-10 22:13:02,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-10 22:13:02,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-10 22:13:02,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-10 22:13:02,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-10 22:13:02,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-10 22:13:02,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-10 22:13:02,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-10 22:13:02,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-10 22:13:02,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-10 22:13:02,263 INFO L238 CfgBuilder]: Building ICFG [2024-10-10 22:13:02,264 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-10 22:13:02,419 INFO L? ?]: Removed 18 outVars from TransFormulas that were not future-live. [2024-10-10 22:13:02,419 INFO L287 CfgBuilder]: Performing block encoding [2024-10-10 22:13:02,455 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-10 22:13:02,456 INFO L314 CfgBuilder]: Removed 5 assume(true) statements. [2024-10-10 22:13:02,456 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:13:02 BoogieIcfgContainer [2024-10-10 22:13:02,456 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-10 22:13:02,459 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-10 22:13:02,460 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-10 22:13:02,463 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-10 22:13:02,463 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.10 10:13:01" (1/3) ... [2024-10-10 22:13:02,465 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d908a84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:13:02, skipping insertion in model container [2024-10-10 22:13:02,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:13:02" (2/3) ... [2024-10-10 22:13:02,465 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d908a84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:13:02, skipping insertion in model container [2024-10-10 22:13:02,466 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:13:02" (3/3) ... [2024-10-10 22:13:02,467 INFO L112 eAbstractionObserver]: Analyzing ICFG array13_pattern.c [2024-10-10 22:13:02,486 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-10 22:13:02,486 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-10 22:13:02,559 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-10 22:13:02,566 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;@b805cd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-10 22:13:02,567 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-10 22:13:02,575 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.75) internal successors, (35), 21 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:13:02,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-10 22:13:02,583 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:13:02,584 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:13:02,584 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:13:02,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:13:02,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1700327762, now seen corresponding path program 1 times [2024-10-10 22:13:02,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:13:02,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358817082] [2024-10-10 22:13:02,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:02,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:13:02,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:02,763 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:13:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:02,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:13:02,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:13:02,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358817082] [2024-10-10 22:13:02,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358817082] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:13:02,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:13:02,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-10 22:13:02,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110101160] [2024-10-10 22:13:02,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:13:02,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-10 22:13:02,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:13:02,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-10 22:13:02,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-10 22:13:02,808 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.75) internal successors, (35), 21 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-10 22:13:02,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:13:02,843 INFO L93 Difference]: Finished difference Result 50 states and 82 transitions. [2024-10-10 22:13:02,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-10 22:13:02,846 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-10-10 22:13:02,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:13:02,850 INFO L225 Difference]: With dead ends: 50 [2024-10-10 22:13:02,851 INFO L226 Difference]: Without dead ends: 24 [2024-10-10 22:13:02,853 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-10 22:13:02,858 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:13:02,858 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:13:02,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-10 22:13:02,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-10-10 22:13:02,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:13:02,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2024-10-10 22:13:02,893 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 14 [2024-10-10 22:13:02,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:13:02,894 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2024-10-10 22:13:02,894 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-10 22:13:02,894 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2024-10-10 22:13:02,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-10 22:13:02,895 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:13:02,896 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:13:02,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-10 22:13:02,896 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:13:02,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:13:02,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1347272957, now seen corresponding path program 1 times [2024-10-10 22:13:02,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:13:02,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136090742] [2024-10-10 22:13:02,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:02,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:13:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:03,252 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:13:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:03,284 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-10 22:13:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:03,294 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-10 22:13:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:13:03,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:13:03,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136090742] [2024-10-10 22:13:03,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136090742] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:13:03,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187692421] [2024-10-10 22:13:03,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:03,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:03,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:13:03,309 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:13:03,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-10 22:13:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:03,389 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-10 22:13:03,396 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:13:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-10 22:13:03,524 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-10 22:13:03,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187692421] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:13:03,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-10 22:13:03,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-10-10 22:13:03,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983045651] [2024-10-10 22:13:03,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:13:03,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-10 22:13:03,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:13:03,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-10 22:13:03,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-10 22:13:03,531 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 22:13:03,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:13:03,623 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2024-10-10 22:13:03,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-10 22:13:03,624 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2024-10-10 22:13:03,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:13:03,625 INFO L225 Difference]: With dead ends: 58 [2024-10-10 22:13:03,625 INFO L226 Difference]: Without dead ends: 34 [2024-10-10 22:13:03,626 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-10 22:13:03,627 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:13:03,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 63 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:13:03,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-10-10 22:13:03,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2024-10-10 22:13:03,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:13:03,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2024-10-10 22:13:03,633 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 27 [2024-10-10 22:13:03,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:13:03,634 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2024-10-10 22:13:03,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 22:13:03,634 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2024-10-10 22:13:03,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-10 22:13:03,635 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:13:03,635 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:13:03,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-10 22:13:03,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:03,836 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:13:03,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:13:03,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1762676017, now seen corresponding path program 1 times [2024-10-10 22:13:03,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:13:03,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988176837] [2024-10-10 22:13:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:03,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:13:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:03,974 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:13:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:03,979 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-10 22:13:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:03,983 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-10 22:13:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-10 22:13:03,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:13:03,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988176837] [2024-10-10 22:13:03,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988176837] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:13:03,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:13:03,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-10 22:13:03,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227177347] [2024-10-10 22:13:03,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:13:03,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-10 22:13:03,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:13:03,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-10 22:13:03,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:13:03,993 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 22:13:04,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:13:04,036 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2024-10-10 22:13:04,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-10 22:13:04,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2024-10-10 22:13:04,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:13:04,038 INFO L225 Difference]: With dead ends: 53 [2024-10-10 22:13:04,038 INFO L226 Difference]: Without dead ends: 32 [2024-10-10 22:13:04,038 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:13:04,040 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:13:04,041 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 43 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:13:04,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-10 22:13:04,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2024-10-10 22:13:04,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:13:04,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2024-10-10 22:13:04,050 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 30 [2024-10-10 22:13:04,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:13:04,052 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2024-10-10 22:13:04,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 22:13:04,052 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2024-10-10 22:13:04,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-10 22:13:04,053 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:13:04,053 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:13:04,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-10 22:13:04,055 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:13:04,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:13:04,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1336204908, now seen corresponding path program 1 times [2024-10-10 22:13:04,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:13:04,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118174883] [2024-10-10 22:13:04,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:04,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:13:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:04,172 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:13:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:04,178 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 22:13:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:04,185 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-10 22:13:04,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-10 22:13:04,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:13:04,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118174883] [2024-10-10 22:13:04,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118174883] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:13:04,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505508746] [2024-10-10 22:13:04,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:04,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:04,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:13:04,195 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:13:04,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-10 22:13:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:04,277 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-10 22:13:04,279 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:13:04,351 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-10 22:13:04,354 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:13:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-10 22:13:04,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505508746] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:13:04,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:13:04,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-10-10 22:13:04,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600675309] [2024-10-10 22:13:04,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:13:04,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-10 22:13:04,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:13:04,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-10 22:13:04,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-10-10 22:13:04,436 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 22:13:04,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:13:04,537 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2024-10-10 22:13:04,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-10 22:13:04,538 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2024-10-10 22:13:04,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:13:04,539 INFO L225 Difference]: With dead ends: 40 [2024-10-10 22:13:04,539 INFO L226 Difference]: Without dead ends: 36 [2024-10-10 22:13:04,539 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-10 22:13:04,540 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:13:04,540 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 63 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:13:04,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-10 22:13:04,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2024-10-10 22:13:04,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:13:04,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2024-10-10 22:13:04,547 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 31 [2024-10-10 22:13:04,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:13:04,548 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2024-10-10 22:13:04,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 22:13:04,548 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2024-10-10 22:13:04,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-10 22:13:04,549 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:13:04,549 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:13:04,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-10 22:13:04,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:04,750 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:13:04,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:13:04,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1854339750, now seen corresponding path program 1 times [2024-10-10 22:13:04,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:13:04,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470738776] [2024-10-10 22:13:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:04,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:13:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:04,946 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:13:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:04,950 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 22:13:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:04,983 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-10 22:13:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-10 22:13:05,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:13:05,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470738776] [2024-10-10 22:13:05,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470738776] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:13:05,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104738495] [2024-10-10 22:13:05,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:05,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:05,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:13:05,005 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:13:05,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-10 22:13:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:05,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-10 22:13:05,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:13:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-10 22:13:05,234 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:13:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-10 22:13:05,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104738495] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:13:05,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:13:05,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 11] total 21 [2024-10-10 22:13:05,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168585329] [2024-10-10 22:13:05,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:13:05,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-10 22:13:05,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:13:05,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-10 22:13:05,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-10-10 22:13:05,472 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 21 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2024-10-10 22:13:06,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:13:06,051 INFO L93 Difference]: Finished difference Result 143 states and 185 transitions. [2024-10-10 22:13:06,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-10 22:13:06,051 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 35 [2024-10-10 22:13:06,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:13:06,057 INFO L225 Difference]: With dead ends: 143 [2024-10-10 22:13:06,057 INFO L226 Difference]: Without dead ends: 120 [2024-10-10 22:13:06,058 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=995, Unknown=0, NotChecked=0, Total=1260 [2024-10-10 22:13:06,059 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 167 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-10 22:13:06,059 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 254 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-10 22:13:06,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-10-10 22:13:06,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 68. [2024-10-10 22:13:06,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 58 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-10 22:13:06,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2024-10-10 22:13:06,089 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 35 [2024-10-10 22:13:06,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:13:06,089 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2024-10-10 22:13:06,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2024-10-10 22:13:06,090 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2024-10-10 22:13:06,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-10 22:13:06,092 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:13:06,092 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:13:06,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-10 22:13:06,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:06,297 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:13:06,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:13:06,297 INFO L85 PathProgramCache]: Analyzing trace with hash 2112505188, now seen corresponding path program 1 times [2024-10-10 22:13:06,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:13:06,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311113364] [2024-10-10 22:13:06,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:06,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:13:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-10 22:13:06,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482595280] [2024-10-10 22:13:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:06,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:06,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:13:06,336 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:13:06,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-10 22:13:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:06,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-10 22:13:06,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:13:06,492 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 11 treesize of output 7 [2024-10-10 22:13:06,776 INFO L349 Elim1Store]: treesize reduction 24, result has 50.0 percent of original size [2024-10-10 22:13:06,776 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 2 case distinctions, treesize of input 58 treesize of output 40 [2024-10-10 22:13:06,928 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 15 treesize of output 7 [2024-10-10 22:13:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 22:13:06,973 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:13:12,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:13:12,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311113364] [2024-10-10 22:13:12,344 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-10 22:13:12,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482595280] [2024-10-10 22:13:12,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482595280] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:13:12,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-10 22:13:12,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-10-10 22:13:12,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784741042] [2024-10-10 22:13:12,345 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-10 22:13:12,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-10 22:13:12,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:13:12,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-10 22:13:12,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=408, Unknown=1, NotChecked=0, Total=506 [2024-10-10 22:13:12,347 INFO L87 Difference]: Start difference. First operand 68 states and 88 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 22:13:13,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:13:13,110 INFO L93 Difference]: Finished difference Result 120 states and 154 transitions. [2024-10-10 22:13:13,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-10 22:13:13,111 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-10-10 22:13:13,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:13:13,113 INFO L225 Difference]: With dead ends: 120 [2024-10-10 22:13:13,113 INFO L226 Difference]: Without dead ends: 116 [2024-10-10 22:13:13,113 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=155, Invalid=774, Unknown=1, NotChecked=0, Total=930 [2024-10-10 22:13:13,114 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 51 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:13:13,114 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 110 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:13:13,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-10-10 22:13:13,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2024-10-10 22:13:13,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 83 states have internal predecessors, (107), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-10 22:13:13,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2024-10-10 22:13:13,149 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 35 [2024-10-10 22:13:13,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:13:13,150 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2024-10-10 22:13:13,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 22:13:13,151 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2024-10-10 22:13:13,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-10 22:13:13,152 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:13:13,152 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:13:13,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-10 22:13:13,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-10 22:13:13,353 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:13:13,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:13:13,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1243752137, now seen corresponding path program 2 times [2024-10-10 22:13:13,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:13:13,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223714636] [2024-10-10 22:13:13,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:13,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:13:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:13,442 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:13:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:13,444 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 22:13:13,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:13,448 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-10 22:13:13,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-10 22:13:13,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:13:13,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223714636] [2024-10-10 22:13:13,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223714636] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:13:13,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506351307] [2024-10-10 22:13:13,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:13:13,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:13,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:13:13,456 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:13:13,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-10 22:13:13,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:13:13,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:13:13,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-10 22:13:13,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:13:13,585 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 22:13:13,585 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:13:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-10 22:13:13,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506351307] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:13:13,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:13:13,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-10 22:13:13,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142300013] [2024-10-10 22:13:13,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:13:13,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-10 22:13:13,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:13:13,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-10 22:13:13,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-10 22:13:13,644 INFO L87 Difference]: Start difference. First operand 97 states and 125 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 22:13:13,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:13:13,755 INFO L93 Difference]: Finished difference Result 144 states and 181 transitions. [2024-10-10 22:13:13,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-10 22:13:13,756 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-10-10 22:13:13,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:13:13,757 INFO L225 Difference]: With dead ends: 144 [2024-10-10 22:13:13,757 INFO L226 Difference]: Without dead ends: 101 [2024-10-10 22:13:13,757 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-10-10 22:13:13,758 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:13:13,759 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 115 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:13:13,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-10-10 22:13:13,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2024-10-10 22:13:13,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 81 states have (on average 1.271604938271605) internal successors, (103), 83 states have internal predecessors, (103), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-10 22:13:13,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 121 transitions. [2024-10-10 22:13:13,779 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 121 transitions. Word has length 36 [2024-10-10 22:13:13,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:13:13,780 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 121 transitions. [2024-10-10 22:13:13,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 22:13:13,780 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 121 transitions. [2024-10-10 22:13:13,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-10 22:13:13,782 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:13:13,782 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:13:13,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-10 22:13:13,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:13,983 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:13:13,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:13:13,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1262324009, now seen corresponding path program 2 times [2024-10-10 22:13:13,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:13:13,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504382807] [2024-10-10 22:13:13,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:13,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:13:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:14,065 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:13:14,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:14,068 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-10 22:13:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:14,070 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-10 22:13:14,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-10 22:13:14,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:13:14,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504382807] [2024-10-10 22:13:14,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504382807] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:13:14,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449843895] [2024-10-10 22:13:14,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:13:14,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:14,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:13:14,074 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:13:14,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-10 22:13:14,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:13:14,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:13:14,132 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-10 22:13:14,133 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:13:14,184 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:13:14,185 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:13:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-10 22:13:14,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449843895] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:13:14,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:13:14,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-10 22:13:14,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65613379] [2024-10-10 22:13:14,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:13:14,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-10 22:13:14,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:13:14,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-10 22:13:14,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-10-10 22:13:14,241 INFO L87 Difference]: Start difference. First operand 97 states and 121 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 22:13:14,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:13:14,410 INFO L93 Difference]: Finished difference Result 149 states and 193 transitions. [2024-10-10 22:13:14,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-10 22:13:14,410 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-10-10 22:13:14,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:13:14,411 INFO L225 Difference]: With dead ends: 149 [2024-10-10 22:13:14,412 INFO L226 Difference]: Without dead ends: 120 [2024-10-10 22:13:14,412 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2024-10-10 22:13:14,413 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:13:14,413 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 136 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:13:14,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-10-10 22:13:14,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 104. [2024-10-10 22:13:14,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 90 states have internal predecessors, (113), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-10 22:13:14,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 131 transitions. [2024-10-10 22:13:14,439 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 131 transitions. Word has length 36 [2024-10-10 22:13:14,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:13:14,441 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 131 transitions. [2024-10-10 22:13:14,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 22:13:14,441 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 131 transitions. [2024-10-10 22:13:14,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-10 22:13:14,442 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:13:14,442 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:13:14,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-10 22:13:14,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-10 22:13:14,643 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:13:14,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:13:14,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1655691874, now seen corresponding path program 3 times [2024-10-10 22:13:14,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:13:14,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966352670] [2024-10-10 22:13:14,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:14,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:13:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:14,729 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:13:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:14,731 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 22:13:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:14,735 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-10 22:13:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:14,738 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-10 22:13:14,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:13:14,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966352670] [2024-10-10 22:13:14,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966352670] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:13:14,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21239476] [2024-10-10 22:13:14,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:13:14,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:14,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:13:14,741 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:13:14,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-10 22:13:14,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-10 22:13:14,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:13:14,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-10 22:13:14,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:13:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-10 22:13:14,947 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:13:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-10 22:13:14,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21239476] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:13:14,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:13:14,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-10-10 22:13:14,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186306099] [2024-10-10 22:13:14,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:13:14,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-10 22:13:14,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:13:14,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-10 22:13:14,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-10-10 22:13:14,998 INFO L87 Difference]: Start difference. First operand 104 states and 131 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 22:13:15,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:13:15,198 INFO L93 Difference]: Finished difference Result 152 states and 183 transitions. [2024-10-10 22:13:15,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-10 22:13:15,198 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2024-10-10 22:13:15,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:13:15,199 INFO L225 Difference]: With dead ends: 152 [2024-10-10 22:13:15,199 INFO L226 Difference]: Without dead ends: 82 [2024-10-10 22:13:15,200 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2024-10-10 22:13:15,200 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:13:15,201 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 104 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:13:15,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-10-10 22:13:15,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2024-10-10 22:13:15,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 63 states have internal predecessors, (74), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-10 22:13:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2024-10-10 22:13:15,211 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 39 [2024-10-10 22:13:15,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:13:15,211 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2024-10-10 22:13:15,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 22:13:15,212 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2024-10-10 22:13:15,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-10 22:13:15,212 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:13:15,212 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:13:15,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-10 22:13:15,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:15,413 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:13:15,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:13:15,413 INFO L85 PathProgramCache]: Analyzing trace with hash 531249981, now seen corresponding path program 3 times [2024-10-10 22:13:15,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:13:15,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613339946] [2024-10-10 22:13:15,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:15,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:13:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:15,506 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:13:15,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:15,509 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-10 22:13:15,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:15,512 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-10 22:13:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:15,515 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-10 22:13:15,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:13:15,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613339946] [2024-10-10 22:13:15,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613339946] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:13:15,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14892994] [2024-10-10 22:13:15,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:13:15,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:15,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:13:15,518 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:13:15,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-10 22:13:15,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-10 22:13:15,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:13:15,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-10 22:13:15,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:13:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-10 22:13:15,731 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:13:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-10-10 22:13:15,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14892994] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:13:15,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:13:15,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 11] total 24 [2024-10-10 22:13:15,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630131425] [2024-10-10 22:13:15,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:13:15,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-10 22:13:15,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:13:15,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-10 22:13:15,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2024-10-10 22:13:15,962 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 24 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 19 states have internal predecessors, (58), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-10 22:13:16,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:13:16,438 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2024-10-10 22:13:16,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-10 22:13:16,438 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 19 states have internal predecessors, (58), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 41 [2024-10-10 22:13:16,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:13:16,439 INFO L225 Difference]: With dead ends: 90 [2024-10-10 22:13:16,439 INFO L226 Difference]: Without dead ends: 84 [2024-10-10 22:13:16,440 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=369, Invalid=1353, Unknown=0, NotChecked=0, Total=1722 [2024-10-10 22:13:16,440 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 97 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-10 22:13:16,441 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 140 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-10 22:13:16,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-10-10 22:13:16,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2024-10-10 22:13:16,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 63 states have internal predecessors, (73), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-10 22:13:16,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2024-10-10 22:13:16,450 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 41 [2024-10-10 22:13:16,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:13:16,451 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2024-10-10 22:13:16,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 19 states have internal predecessors, (58), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-10 22:13:16,451 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2024-10-10 22:13:16,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-10 22:13:16,452 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:13:16,452 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:13:16,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-10 22:13:16,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-10 22:13:16,657 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:13:16,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:13:16,657 INFO L85 PathProgramCache]: Analyzing trace with hash 940153084, now seen corresponding path program 1 times [2024-10-10 22:13:16,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:13:16,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484525858] [2024-10-10 22:13:16,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:16,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:13:16,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-10 22:13:16,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760432878] [2024-10-10 22:13:16,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:16,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:16,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:13:16,678 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:13:16,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-10 22:13:16,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:16,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-10 22:13:16,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:13:16,820 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 11 treesize of output 7 [2024-10-10 22:13:17,009 INFO L349 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2024-10-10 22:13:17,009 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 2 case distinctions, treesize of input 35 treesize of output 24 [2024-10-10 22:13:17,183 INFO L349 Elim1Store]: treesize reduction 24, result has 50.0 percent of original size [2024-10-10 22:13:17,184 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 2 case distinctions, treesize of input 58 treesize of output 40 [2024-10-10 22:13:17,304 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 15 treesize of output 7 [2024-10-10 22:13:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-10 22:13:17,340 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:13:18,259 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 30 treesize of output 28 [2024-10-10 22:13:18,262 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 45 treesize of output 43 [2024-10-10 22:13:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-10-10 22:13:18,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:13:18,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484525858] [2024-10-10 22:13:18,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-10 22:13:18,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760432878] [2024-10-10 22:13:18,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760432878] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:13:18,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-10 22:13:18,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2024-10-10 22:13:18,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488593456] [2024-10-10 22:13:18,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-10 22:13:18,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-10 22:13:18,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:13:18,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-10 22:13:18,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2024-10-10 22:13:18,474 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-10 22:13:20,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:13:20,692 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2024-10-10 22:13:20,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-10 22:13:20,692 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 49 [2024-10-10 22:13:20,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:13:20,693 INFO L225 Difference]: With dead ends: 91 [2024-10-10 22:13:20,693 INFO L226 Difference]: Without dead ends: 55 [2024-10-10 22:13:20,694 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 63 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=413, Invalid=1749, Unknown=0, NotChecked=0, Total=2162 [2024-10-10 22:13:20,695 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 90 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:13:20,695 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 194 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-10 22:13:20,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-10 22:13:20,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2024-10-10 22:13:20,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 38 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:13:20,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2024-10-10 22:13:20,704 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 49 [2024-10-10 22:13:20,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:13:20,704 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2024-10-10 22:13:20,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-10 22:13:20,705 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2024-10-10 22:13:20,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-10 22:13:20,705 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:13:20,705 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:13:20,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-10 22:13:20,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:20,909 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:13:20,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:13:20,910 INFO L85 PathProgramCache]: Analyzing trace with hash 951775907, now seen corresponding path program 4 times [2024-10-10 22:13:20,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:13:20,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794491854] [2024-10-10 22:13:20,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:20,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:13:20,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-10 22:13:20,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920659603] [2024-10-10 22:13:20,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 22:13:20,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:20,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:13:20,934 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:13:20,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-10 22:13:21,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 22:13:21,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:13:21,099 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-10-10 22:13:21,102 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:13:21,193 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 11 treesize of output 7 [2024-10-10 22:13:21,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-10 22:13:21,358 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:13:21,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-10-10 22:13:21,442 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:13:21,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2024-10-10 22:13:22,061 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-10 22:13:22,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:22,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:22,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:22,078 INFO L349 Elim1Store]: treesize reduction 45, result has 19.6 percent of original size [2024-10-10 22:13:22,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 74 treesize of output 98 [2024-10-10 22:13:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 22:13:22,515 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:13:24,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:13:24,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794491854] [2024-10-10 22:13:24,870 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-10 22:13:24,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920659603] [2024-10-10 22:13:24,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920659603] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:13:24,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-10 22:13:24,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2024-10-10 22:13:24,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160501007] [2024-10-10 22:13:24,871 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-10 22:13:24,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-10 22:13:24,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:13:24,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-10 22:13:24,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2024-10-10 22:13:24,872 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 26 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:13:25,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:13:25,756 INFO L93 Difference]: Finished difference Result 98 states and 122 transitions. [2024-10-10 22:13:25,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-10 22:13:25,756 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 26 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2024-10-10 22:13:25,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:13:25,757 INFO L225 Difference]: With dead ends: 98 [2024-10-10 22:13:25,757 INFO L226 Difference]: Without dead ends: 94 [2024-10-10 22:13:25,758 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=293, Invalid=2059, Unknown=0, NotChecked=0, Total=2352 [2024-10-10 22:13:25,759 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 59 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-10 22:13:25,759 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 136 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-10 22:13:25,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-10-10 22:13:25,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 72. [2024-10-10 22:13:25,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 63 states have internal predecessors, (78), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-10 22:13:25,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2024-10-10 22:13:25,775 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 47 [2024-10-10 22:13:25,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:13:25,776 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2024-10-10 22:13:25,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 26 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:13:25,776 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2024-10-10 22:13:25,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-10 22:13:25,777 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:13:25,777 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:13:25,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-10 22:13:25,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-10 22:13:25,978 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:13:25,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:13:25,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1042368799, now seen corresponding path program 4 times [2024-10-10 22:13:25,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:13:25,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602939959] [2024-10-10 22:13:25,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:25,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:13:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-10 22:13:25,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213273620] [2024-10-10 22:13:25,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 22:13:25,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:25,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:13:25,997 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:13:25,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-10 22:13:26,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 22:13:26,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:13:26,167 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-10-10 22:13:26,170 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:13:26,200 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 11 treesize of output 7 [2024-10-10 22:13:26,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-10 22:13:26,333 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:13:26,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-10-10 22:13:26,367 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:13:26,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2024-10-10 22:13:26,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:26,888 INFO L349 Elim1Store]: treesize reduction 284, result has 13.1 percent of original size [2024-10-10 22:13:26,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 7 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 42 case distinctions, treesize of input 84 treesize of output 94 [2024-10-10 22:13:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 22:13:27,242 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:13:29,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:13:29,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602939959] [2024-10-10 22:13:29,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-10 22:13:29,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213273620] [2024-10-10 22:13:29,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213273620] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:13:29,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-10 22:13:29,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-10-10 22:13:29,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740888510] [2024-10-10 22:13:29,202 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-10 22:13:29,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-10 22:13:29,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:13:29,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-10 22:13:29,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1184, Unknown=0, NotChecked=0, Total=1406 [2024-10-10 22:13:29,204 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 26 states, 25 states have (on average 1.52) internal successors, (38), 23 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:13:29,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:13:29,585 INFO L93 Difference]: Finished difference Result 132 states and 162 transitions. [2024-10-10 22:13:29,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-10 22:13:29,586 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.52) internal successors, (38), 23 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2024-10-10 22:13:29,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:13:29,587 INFO L225 Difference]: With dead ends: 132 [2024-10-10 22:13:29,587 INFO L226 Difference]: Without dead ends: 118 [2024-10-10 22:13:29,587 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=262, Invalid=1378, Unknown=0, NotChecked=0, Total=1640 [2024-10-10 22:13:29,588 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 43 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-10 22:13:29,588 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 165 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-10 22:13:29,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-10-10 22:13:29,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2024-10-10 22:13:29,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 75 states have internal predecessors, (92), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-10 22:13:29,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2024-10-10 22:13:29,605 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 47 [2024-10-10 22:13:29,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:13:29,605 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2024-10-10 22:13:29,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.52) internal successors, (38), 23 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:13:29,605 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2024-10-10 22:13:29,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-10 22:13:29,606 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:13:29,606 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:13:29,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-10 22:13:29,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-10 22:13:29,806 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:13:29,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:13:29,807 INFO L85 PathProgramCache]: Analyzing trace with hash -76515018, now seen corresponding path program 5 times [2024-10-10 22:13:29,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:13:29,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150939612] [2024-10-10 22:13:29,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:29,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:13:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:29,940 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:13:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:29,943 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-10 22:13:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:29,948 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-10 22:13:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-10 22:13:29,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:13:29,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150939612] [2024-10-10 22:13:29,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150939612] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:13:29,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468838507] [2024-10-10 22:13:29,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 22:13:29,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:29,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:13:29,954 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:13:29,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-10 22:13:30,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-10 22:13:30,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:13:30,031 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-10 22:13:30,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:13:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 27 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-10 22:13:30,106 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:13:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-10 22:13:30,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468838507] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:13:30,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:13:30,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-10 22:13:30,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781893027] [2024-10-10 22:13:30,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:13:30,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-10 22:13:30,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:13:30,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-10 22:13:30,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-10 22:13:30,157 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 22:13:30,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:13:30,265 INFO L93 Difference]: Finished difference Result 192 states and 238 transitions. [2024-10-10 22:13:30,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-10 22:13:30,265 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2024-10-10 22:13:30,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:13:30,266 INFO L225 Difference]: With dead ends: 192 [2024-10-10 22:13:30,266 INFO L226 Difference]: Without dead ends: 121 [2024-10-10 22:13:30,266 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-10-10 22:13:30,267 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:13:30,267 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 150 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:13:30,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-10-10 22:13:30,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 108. [2024-10-10 22:13:30,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 93 states have (on average 1.2258064516129032) internal successors, (114), 93 states have internal predecessors, (114), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-10 22:13:30,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 132 transitions. [2024-10-10 22:13:30,288 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 132 transitions. Word has length 48 [2024-10-10 22:13:30,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:13:30,288 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 132 transitions. [2024-10-10 22:13:30,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 22:13:30,288 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 132 transitions. [2024-10-10 22:13:30,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-10 22:13:30,289 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:13:30,289 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:13:30,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-10 22:13:30,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-10 22:13:30,490 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:13:30,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:13:30,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1863898278, now seen corresponding path program 6 times [2024-10-10 22:13:30,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:13:30,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899714605] [2024-10-10 22:13:30,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:30,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:13:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:30,616 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:13:30,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:30,619 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-10 22:13:30,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:30,621 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-10 22:13:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-10 22:13:30,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:13:30,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899714605] [2024-10-10 22:13:30,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899714605] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:13:30,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657461262] [2024-10-10 22:13:30,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-10 22:13:30,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:30,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:13:30,625 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:13:30,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-10 22:13:30,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-10-10 22:13:30,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:13:30,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-10 22:13:30,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:13:31,004 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-10 22:13:31,004 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:13:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-10 22:13:31,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657461262] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:13:31,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:13:31,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-10-10 22:13:31,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194425989] [2024-10-10 22:13:31,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:13:31,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-10 22:13:31,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:13:31,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-10 22:13:31,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-10-10 22:13:31,074 INFO L87 Difference]: Start difference. First operand 108 states and 132 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-10 22:13:31,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:13:31,397 INFO L93 Difference]: Finished difference Result 149 states and 180 transitions. [2024-10-10 22:13:31,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-10 22:13:31,397 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-10-10 22:13:31,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:13:31,398 INFO L225 Difference]: With dead ends: 149 [2024-10-10 22:13:31,398 INFO L226 Difference]: Without dead ends: 118 [2024-10-10 22:13:31,399 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 91 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2024-10-10 22:13:31,399 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 32 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:13:31,400 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 261 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:13:31,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-10-10 22:13:31,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 109. [2024-10-10 22:13:31,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 94 states have (on average 1.1914893617021276) internal successors, (112), 94 states have internal predecessors, (112), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-10 22:13:31,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2024-10-10 22:13:31,423 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 48 [2024-10-10 22:13:31,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:13:31,424 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2024-10-10 22:13:31,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-10 22:13:31,424 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2024-10-10 22:13:31,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-10 22:13:31,425 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:13:31,425 INFO L215 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:13:31,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-10 22:13:31,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:31,625 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:13:31,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:13:31,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1082986480, now seen corresponding path program 7 times [2024-10-10 22:13:31,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:13:31,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894614576] [2024-10-10 22:13:31,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:31,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:13:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:31,730 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:13:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:31,732 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-10 22:13:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:31,735 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-10 22:13:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-10 22:13:31,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:13:31,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894614576] [2024-10-10 22:13:31,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894614576] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:13:31,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166149190] [2024-10-10 22:13:31,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-10 22:13:31,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:31,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:13:31,740 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:13:31,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-10 22:13:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:31,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-10 22:13:31,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:13:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-10 22:13:31,905 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:13:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-10 22:13:31,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166149190] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:13:31,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:13:31,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-10 22:13:31,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862712850] [2024-10-10 22:13:31,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:13:31,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-10 22:13:31,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:13:31,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-10 22:13:31,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-10-10 22:13:31,982 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 22:13:32,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:13:32,153 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2024-10-10 22:13:32,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-10 22:13:32,154 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2024-10-10 22:13:32,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:13:32,155 INFO L225 Difference]: With dead ends: 128 [2024-10-10 22:13:32,155 INFO L226 Difference]: Without dead ends: 107 [2024-10-10 22:13:32,155 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2024-10-10 22:13:32,155 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:13:32,156 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 135 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:13:32,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-10-10 22:13:32,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2024-10-10 22:13:32,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 88 states have (on average 1.1704545454545454) internal successors, (103), 88 states have internal predecessors, (103), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-10 22:13:32,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2024-10-10 22:13:32,180 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 52 [2024-10-10 22:13:32,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:13:32,181 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2024-10-10 22:13:32,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 22:13:32,181 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2024-10-10 22:13:32,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-10 22:13:32,183 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:13:32,183 INFO L215 NwaCegarLoop]: trace histogram [9, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:13:32,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-10 22:13:32,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-10 22:13:32,383 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:13:32,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:13:32,384 INFO L85 PathProgramCache]: Analyzing trace with hash 908114467, now seen corresponding path program 8 times [2024-10-10 22:13:32,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:13:32,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53353031] [2024-10-10 22:13:32,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:32,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:13:32,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:32,544 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:13:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:32,546 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-10 22:13:32,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:32,548 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-10 22:13:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-10-10 22:13:32,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:13:32,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53353031] [2024-10-10 22:13:32,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53353031] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:13:32,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909852353] [2024-10-10 22:13:32,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:13:32,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:32,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:13:32,553 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:13:32,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-10 22:13:32,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:13:32,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:13:32,636 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-10 22:13:32,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:13:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2024-10-10 22:13:32,707 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:13:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-10-10 22:13:32,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909852353] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:13:32,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:13:32,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-10-10 22:13:32,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853908718] [2024-10-10 22:13:32,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:13:32,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-10 22:13:32,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:13:32,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-10 22:13:32,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2024-10-10 22:13:32,798 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 22:13:33,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:13:33,000 INFO L93 Difference]: Finished difference Result 153 states and 181 transitions. [2024-10-10 22:13:33,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-10 22:13:33,001 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2024-10-10 22:13:33,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:13:33,004 INFO L225 Difference]: With dead ends: 153 [2024-10-10 22:13:33,004 INFO L226 Difference]: Without dead ends: 119 [2024-10-10 22:13:33,004 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2024-10-10 22:13:33,005 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 39 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:13:33,005 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 124 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:13:33,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-10-10 22:13:33,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2024-10-10 22:13:33,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 94 states have (on average 1.1702127659574468) internal successors, (110), 94 states have internal predecessors, (110), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-10 22:13:33,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 128 transitions. [2024-10-10 22:13:33,031 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 128 transitions. Word has length 57 [2024-10-10 22:13:33,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:13:33,031 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 128 transitions. [2024-10-10 22:13:33,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 22:13:33,032 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 128 transitions. [2024-10-10 22:13:33,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-10 22:13:33,033 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:13:33,033 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:13:33,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-10 22:13:33,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-10 22:13:33,233 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:13:33,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:13:33,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1021218877, now seen corresponding path program 1 times [2024-10-10 22:13:33,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:13:33,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469552197] [2024-10-10 22:13:33,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:33,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:13:33,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-10 22:13:33,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914069028] [2024-10-10 22:13:33,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:33,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:33,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:13:33,260 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:13:33,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-10 22:13:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:33,501 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-10-10 22:13:33,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:13:33,575 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 11 treesize of output 7 [2024-10-10 22:13:33,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-10 22:13:33,739 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:13:33,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-10-10 22:13:33,790 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:13:33,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2024-10-10 22:13:34,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:34,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:34,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:34,267 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-10 22:13:34,279 INFO L349 Elim1Store]: treesize reduction 55, result has 16.7 percent of original size [2024-10-10 22:13:34,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 84 treesize of output 95 [2024-10-10 22:13:34,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:34,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:34,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:34,804 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-10-10 22:13:34,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 70 treesize of output 61 [2024-10-10 22:13:35,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:35,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:35,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:35,591 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-10 22:13:35,599 INFO L349 Elim1Store]: treesize reduction 25, result has 10.7 percent of original size [2024-10-10 22:13:35,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 63 treesize of output 28 [2024-10-10 22:13:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 60 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-10 22:13:35,656 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:13:37,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:13:37,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469552197] [2024-10-10 22:13:37,810 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-10 22:13:37,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914069028] [2024-10-10 22:13:37,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914069028] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:13:37,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-10 22:13:37,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2024-10-10 22:13:37,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362028553] [2024-10-10 22:13:37,810 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-10 22:13:37,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-10 22:13:37,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:13:37,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-10 22:13:37,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=2395, Unknown=0, NotChecked=0, Total=2756 [2024-10-10 22:13:37,812 INFO L87 Difference]: Start difference. First operand 109 states and 128 transitions. Second operand has 39 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 31 states have internal predecessors, (45), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-10 22:13:39,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:13:39,523 INFO L93 Difference]: Finished difference Result 141 states and 162 transitions. [2024-10-10 22:13:39,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-10 22:13:39,524 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 31 states have internal predecessors, (45), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 61 [2024-10-10 22:13:39,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:13:39,524 INFO L225 Difference]: With dead ends: 141 [2024-10-10 22:13:39,525 INFO L226 Difference]: Without dead ends: 125 [2024-10-10 22:13:39,526 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1698 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=675, Invalid=4017, Unknown=0, NotChecked=0, Total=4692 [2024-10-10 22:13:39,526 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 76 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-10 22:13:39,526 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 215 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-10 22:13:39,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-10-10 22:13:39,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 117. [2024-10-10 22:13:39,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 99 states have (on average 1.1717171717171717) internal successors, (116), 99 states have internal predecessors, (116), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-10 22:13:39,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 138 transitions. [2024-10-10 22:13:39,548 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 138 transitions. Word has length 61 [2024-10-10 22:13:39,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:13:39,548 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 138 transitions. [2024-10-10 22:13:39,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 31 states have internal predecessors, (45), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-10 22:13:39,549 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 138 transitions. [2024-10-10 22:13:39,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-10 22:13:39,549 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:13:39,549 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:13:39,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-10 22:13:39,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-10 22:13:39,750 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:13:39,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:13:39,750 INFO L85 PathProgramCache]: Analyzing trace with hash -972925829, now seen corresponding path program 1 times [2024-10-10 22:13:39,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:13:39,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334763630] [2024-10-10 22:13:39,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:39,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:13:39,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-10 22:13:39,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494789821] [2024-10-10 22:13:39,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:39,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:39,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:13:39,773 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:13:39,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-10 22:13:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:13:40,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-10-10 22:13:40,311 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:13:40,396 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 11 treesize of output 7 [2024-10-10 22:13:40,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-10 22:13:40,609 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:13:40,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-10-10 22:13:40,657 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:13:40,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2024-10-10 22:13:41,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:41,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:41,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:41,159 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-10 22:13:41,175 INFO L349 Elim1Store]: treesize reduction 45, result has 19.6 percent of original size [2024-10-10 22:13:41,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 74 treesize of output 98 [2024-10-10 22:13:41,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:41,873 INFO L349 Elim1Store]: treesize reduction 284, result has 13.1 percent of original size [2024-10-10 22:13:41,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 7 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 42 case distinctions, treesize of input 84 treesize of output 94 [2024-10-10 22:13:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 59 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-10 22:13:42,257 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:13:44,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:13:44,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334763630] [2024-10-10 22:13:44,329 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-10 22:13:44,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494789821] [2024-10-10 22:13:44,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494789821] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:13:44,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-10 22:13:44,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2024-10-10 22:13:44,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845291958] [2024-10-10 22:13:44,330 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-10 22:13:44,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-10-10 22:13:44,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:13:44,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-10-10 22:13:44,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2121, Unknown=0, NotChecked=0, Total=2450 [2024-10-10 22:13:44,332 INFO L87 Difference]: Start difference. First operand 117 states and 138 transitions. Second operand has 37 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 29 states have internal predecessors, (45), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-10 22:13:45,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:13:45,332 INFO L93 Difference]: Finished difference Result 160 states and 185 transitions. [2024-10-10 22:13:45,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-10-10 22:13:45,332 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 29 states have internal predecessors, (45), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 61 [2024-10-10 22:13:45,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:13:45,333 INFO L225 Difference]: With dead ends: 160 [2024-10-10 22:13:45,333 INFO L226 Difference]: Without dead ends: 144 [2024-10-10 22:13:45,334 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=396, Invalid=2684, Unknown=0, NotChecked=0, Total=3080 [2024-10-10 22:13:45,334 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 79 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-10 22:13:45,335 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 251 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-10 22:13:45,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-10-10 22:13:45,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 127. [2024-10-10 22:13:45,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 106 states have (on average 1.169811320754717) internal successors, (124), 106 states have internal predecessors, (124), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-10 22:13:45,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 150 transitions. [2024-10-10 22:13:45,360 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 150 transitions. Word has length 61 [2024-10-10 22:13:45,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:13:45,360 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 150 transitions. [2024-10-10 22:13:45,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 29 states have internal predecessors, (45), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-10 22:13:45,361 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 150 transitions. [2024-10-10 22:13:45,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-10 22:13:45,361 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:13:45,362 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:13:45,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-10 22:13:45,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:45,562 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:13:45,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:13:45,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1295978491, now seen corresponding path program 2 times [2024-10-10 22:13:45,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:13:45,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491946188] [2024-10-10 22:13:45,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:45,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:13:45,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-10 22:13:45,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085693598] [2024-10-10 22:13:45,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:13:45,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:45,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:13:45,586 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:13:45,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-10 22:13:45,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:13:45,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:13:45,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-10-10 22:13:45,943 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:13:46,001 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 11 treesize of output 7 [2024-10-10 22:13:46,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-10 22:13:46,179 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:13:46,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-10-10 22:13:46,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:13:46,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2024-10-10 22:13:46,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:46,756 INFO L349 Elim1Store]: treesize reduction 284, result has 13.1 percent of original size [2024-10-10 22:13:46,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 7 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 42 case distinctions, treesize of input 84 treesize of output 94 [2024-10-10 22:13:47,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:47,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:47,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:47,058 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-10 22:13:47,074 INFO L349 Elim1Store]: treesize reduction 55, result has 16.7 percent of original size [2024-10-10 22:13:47,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 84 treesize of output 78 [2024-10-10 22:13:47,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:47,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:47,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:47,621 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-10 22:13:47,623 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:13:47,623 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 42 treesize of output 19 [2024-10-10 22:13:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 40 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-10 22:13:47,701 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:13:49,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:13:49,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491946188] [2024-10-10 22:13:49,779 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-10 22:13:49,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085693598] [2024-10-10 22:13:49,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085693598] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:13:49,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-10 22:13:49,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2024-10-10 22:13:49,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728027140] [2024-10-10 22:13:49,780 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-10 22:13:49,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-10 22:13:49,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:13:49,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-10 22:13:49,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1750, Unknown=0, NotChecked=0, Total=2070 [2024-10-10 22:13:49,781 INFO L87 Difference]: Start difference. First operand 127 states and 150 transitions. Second operand has 31 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:13:50,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:13:50,532 INFO L93 Difference]: Finished difference Result 229 states and 269 transitions. [2024-10-10 22:13:50,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-10 22:13:50,532 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 61 [2024-10-10 22:13:50,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:13:50,533 INFO L225 Difference]: With dead ends: 229 [2024-10-10 22:13:50,533 INFO L226 Difference]: Without dead ends: 146 [2024-10-10 22:13:50,534 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=372, Invalid=2078, Unknown=0, NotChecked=0, Total=2450 [2024-10-10 22:13:50,534 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-10 22:13:50,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 151 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-10 22:13:50,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-10-10 22:13:50,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2024-10-10 22:13:50,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 115 states have (on average 1.1565217391304348) internal successors, (133), 115 states have internal predecessors, (133), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-10-10 22:13:50,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 163 transitions. [2024-10-10 22:13:50,557 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 163 transitions. Word has length 61 [2024-10-10 22:13:50,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:13:50,557 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 163 transitions. [2024-10-10 22:13:50,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:13:50,558 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 163 transitions. [2024-10-10 22:13:50,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-10 22:13:50,559 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:13:50,559 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:13:50,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-10 22:13:50,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:50,759 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:13:50,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:13:50,760 INFO L85 PathProgramCache]: Analyzing trace with hash 704730156, now seen corresponding path program 9 times [2024-10-10 22:13:50,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:13:50,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512074010] [2024-10-10 22:13:50,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:13:50,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:13:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-10 22:13:50,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040000194] [2024-10-10 22:13:50,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:13:50,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:13:50,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:13:50,807 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:13:50,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-10 22:13:53,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-10 22:13:53,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:13:53,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-10-10 22:13:53,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:13:53,227 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 11 treesize of output 7 [2024-10-10 22:13:53,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-10 22:13:53,281 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:13:53,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-10-10 22:13:53,383 INFO L349 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2024-10-10 22:13:53,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 40 [2024-10-10 22:13:53,449 INFO L349 Elim1Store]: treesize reduction 76, result has 22.4 percent of original size [2024-10-10 22:13:53,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 46 treesize of output 54 [2024-10-10 22:13:53,519 INFO L349 Elim1Store]: treesize reduction 106, result has 17.2 percent of original size [2024-10-10 22:13:53,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 57 treesize of output 68 [2024-10-10 22:13:53,703 INFO L349 Elim1Store]: treesize reduction 168, result has 21.5 percent of original size [2024-10-10 22:13:53,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 66 treesize of output 80 [2024-10-10 22:13:53,799 INFO L349 Elim1Store]: treesize reduction 196, result has 16.6 percent of original size [2024-10-10 22:13:53,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 25 case distinctions, treesize of input 77 treesize of output 94 [2024-10-10 22:13:53,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:53,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:53,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:53,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:53,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:53,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:53,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:53,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:53,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:53,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:53,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:53,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:53,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:53,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:53,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:53,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:53,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:53,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:53,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:53,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:53,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:53,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:53,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:53,890 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:13:53,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 88 treesize of output 108 [2024-10-10 22:13:54,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:54,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:54,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:54,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:54,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:54,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:54,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:54,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:54,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:54,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:54,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:54,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:54,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:54,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:54,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:54,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:54,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:54,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:54,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:54,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:54,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:54,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:54,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:13:54,947 INFO L349 Elim1Store]: treesize reduction 550, result has 34.4 percent of original size [2024-10-10 22:13:54,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 36 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 171 case distinctions, treesize of input 186 treesize of output 358 [2024-10-10 22:14:07,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:07,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:07,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:07,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:07,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:07,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:07,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:07,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:07,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:07,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:07,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:07,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:07,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:07,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:07,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:07,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:07,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:07,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:07,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:07,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:07,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:07,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:07,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:07,642 INFO L349 Elim1Store]: treesize reduction 716, result has 17.3 percent of original size [2024-10-10 22:14:07,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 19 select indices, 19 select index equivalence classes, 36 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 171 case distinctions, treesize of input 774 treesize of output 434 [2024-10-10 22:14:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 8 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-10 22:14:11,178 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:14:17,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:14:17,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512074010] [2024-10-10 22:14:17,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-10 22:14:17,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040000194] [2024-10-10 22:14:17,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040000194] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:14:17,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-10 22:14:17,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2024-10-10 22:14:17,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855413132] [2024-10-10 22:14:17,886 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-10 22:14:17,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-10-10 22:14:17,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:14:17,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-10-10 22:14:17,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=3326, Unknown=0, NotChecked=0, Total=3782 [2024-10-10 22:14:17,887 INFO L87 Difference]: Start difference. First operand 139 states and 163 transitions. Second operand has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 40 states have internal predecessors, (57), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:14:24,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:14:24,181 INFO L93 Difference]: Finished difference Result 240 states and 293 transitions. [2024-10-10 22:14:24,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-10-10 22:14:24,181 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 40 states have internal predecessors, (57), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 63 [2024-10-10 22:14:24,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:14:24,183 INFO L225 Difference]: With dead ends: 240 [2024-10-10 22:14:24,183 INFO L226 Difference]: Without dead ends: 226 [2024-10-10 22:14:24,184 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2048 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=840, Invalid=6816, Unknown=0, NotChecked=0, Total=7656 [2024-10-10 22:14:24,184 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 58 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-10-10 22:14:24,185 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 414 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1638 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-10-10 22:14:24,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-10-10 22:14:24,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 194. [2024-10-10 22:14:24,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 165 states have (on average 1.1757575757575758) internal successors, (194), 165 states have internal predecessors, (194), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-10-10 22:14:24,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 232 transitions. [2024-10-10 22:14:24,240 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 232 transitions. Word has length 63 [2024-10-10 22:14:24,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:14:24,240 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 232 transitions. [2024-10-10 22:14:24,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 40 states have internal predecessors, (57), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:14:24,240 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 232 transitions. [2024-10-10 22:14:24,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-10 22:14:24,241 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:14:24,241 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:14:24,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-10 22:14:24,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:14:24,442 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:14:24,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:14:24,443 INFO L85 PathProgramCache]: Analyzing trace with hash 766769770, now seen corresponding path program 5 times [2024-10-10 22:14:24,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:14:24,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039434567] [2024-10-10 22:14:24,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:14:24,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:14:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-10 22:14:24,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979145393] [2024-10-10 22:14:24,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 22:14:24,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:14:24,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:14:24,475 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:14:24,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-10 22:14:25,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-10-10 22:14:25,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:14:25,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-10-10 22:14:25,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:14:25,742 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 11 treesize of output 7 [2024-10-10 22:14:25,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-10 22:14:25,807 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:14:25,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-10-10 22:14:25,932 INFO L349 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2024-10-10 22:14:25,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 40 [2024-10-10 22:14:25,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:25,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:25,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:25,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:25,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:25,983 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-10 22:14:25,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 54 [2024-10-10 22:14:26,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:26,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:26,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:26,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:26,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:26,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:26,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:26,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:26,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:14:26,041 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:14:26,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2024-10-10 22:14:26,227 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:14:26,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2024-10-10 22:14:26,287 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:14:26,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2024-10-10 22:14:26,354 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:14:26,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 88 [2024-10-10 22:14:27,433 INFO L349 Elim1Store]: treesize reduction 828, result has 13.3 percent of original size [2024-10-10 22:14:27,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 19 select indices, 19 select index equivalence classes, 36 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 189 case distinctions, treesize of input 154 treesize of output 194 [2024-10-10 22:14:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 8 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-10 22:14:28,613 INFO L311 TraceCheckSpWp]: Computing backward predicates...