./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/array24_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array24_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b41c571dabcbc4670dde65107f8da5b879f13435b678b4e9a9cdcc7ef0066cf6 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 14:56:03,033 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 14:56:03,112 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 14:56:03,119 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 14:56:03,122 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 14:56:03,147 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 14:56:03,147 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 14:56:03,148 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 14:56:03,148 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 14:56:03,149 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 14:56:03,149 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 14:56:03,149 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 14:56:03,150 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 14:56:03,150 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 14:56:03,151 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 14:56:03,151 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 14:56:03,155 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 14:56:03,156 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 14:56:03,156 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 14:56:03,156 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 14:56:03,156 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 14:56:03,157 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 14:56:03,157 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 14:56:03,157 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 14:56:03,158 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 14:56:03,158 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 14:56:03,158 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 14:56:03,158 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 14:56:03,159 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 14:56:03,159 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 14:56:03,159 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 14:56:03,160 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 14:56:03,160 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:56:03,164 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 14:56:03,164 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 14:56:03,164 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 14:56:03,164 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 14:56:03,165 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 14:56:03,165 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 14:56:03,165 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 14:56:03,165 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 14:56:03,166 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 14:56:03,166 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b41c571dabcbc4670dde65107f8da5b879f13435b678b4e9a9cdcc7ef0066cf6 [2024-10-12 14:56:03,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 14:56:03,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 14:56:03,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 14:56:03,442 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 14:56:03,442 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 14:56:03,443 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array24_pattern.c [2024-10-12 14:56:04,882 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 14:56:05,062 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 14:56:05,062 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array24_pattern.c [2024-10-12 14:56:05,070 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac00604fb/31b1e1cf4fc3475287c174634131e826/FLAGc69dabc69 [2024-10-12 14:56:05,083 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac00604fb/31b1e1cf4fc3475287c174634131e826 [2024-10-12 14:56:05,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 14:56:05,087 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 14:56:05,089 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 14:56:05,089 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 14:56:05,095 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 14:56:05,095 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:56:05" (1/1) ... [2024-10-12 14:56:05,096 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70848758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:56:05, skipping insertion in model container [2024-10-12 14:56:05,097 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:56:05" (1/1) ... [2024-10-12 14:56:05,121 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 14:56:05,292 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/array24_pattern.c[1359,1372] [2024-10-12 14:56:05,323 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:56:05,335 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 14:56:05,350 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/array24_pattern.c[1359,1372] [2024-10-12 14:56:05,364 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:56:05,385 INFO L204 MainTranslator]: Completed translation [2024-10-12 14:56:05,386 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:56:05 WrapperNode [2024-10-12 14:56:05,386 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 14:56:05,387 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 14:56:05,388 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 14:56:05,388 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 14:56:05,395 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:56:05" (1/1) ... [2024-10-12 14:56:05,400 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:56:05" (1/1) ... [2024-10-12 14:56:05,420 INFO L138 Inliner]: procedures = 17, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 107 [2024-10-12 14:56:05,420 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 14:56:05,421 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 14:56:05,421 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 14:56:05,421 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 14:56:05,432 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:56:05" (1/1) ... [2024-10-12 14:56:05,433 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:56:05" (1/1) ... [2024-10-12 14:56:05,435 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:56:05" (1/1) ... [2024-10-12 14:56:05,456 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]. [2024-10-12 14:56:05,456 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:56:05" (1/1) ... [2024-10-12 14:56:05,457 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:56:05" (1/1) ... [2024-10-12 14:56:05,461 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:56:05" (1/1) ... [2024-10-12 14:56:05,465 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:56:05" (1/1) ... [2024-10-12 14:56:05,467 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:56:05" (1/1) ... [2024-10-12 14:56:05,471 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:56:05" (1/1) ... [2024-10-12 14:56:05,473 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 14:56:05,474 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 14:56:05,475 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 14:56:05,475 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 14:56:05,476 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:56:05" (1/1) ... [2024-10-12 14:56:05,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:56:05,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:56:05,508 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-12 14:56:05,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-12 14:56:05,563 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2024-10-12 14:56:05,563 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2024-10-12 14:56:05,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 14:56:05,563 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-12 14:56:05,564 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-12 14:56:05,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 14:56:05,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 14:56:05,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-12 14:56:05,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 14:56:05,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 14:56:05,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 14:56:05,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 14:56:05,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 14:56:05,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 14:56:05,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-12 14:56:05,655 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 14:56:05,657 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 14:56:05,899 INFO L? ?]: Removed 25 outVars from TransFormulas that were not future-live. [2024-10-12 14:56:05,899 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 14:56:05,930 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 14:56:05,930 INFO L314 CfgBuilder]: Removed 5 assume(true) statements. [2024-10-12 14:56:05,931 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:56:05 BoogieIcfgContainer [2024-10-12 14:56:05,931 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 14:56:05,933 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 14:56:05,933 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 14:56:05,937 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 14:56:05,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 02:56:05" (1/3) ... [2024-10-12 14:56:05,939 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544f4d18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:56:05, skipping insertion in model container [2024-10-12 14:56:05,939 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:56:05" (2/3) ... [2024-10-12 14:56:05,939 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544f4d18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:56:05, skipping insertion in model container [2024-10-12 14:56:05,939 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:56:05" (3/3) ... [2024-10-12 14:56:05,941 INFO L112 eAbstractionObserver]: Analyzing ICFG array24_pattern.c [2024-10-12 14:56:05,955 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 14:56:05,955 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 14:56:06,026 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 14:56:06,045 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;@64b93eb8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 14:56:06,045 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 14:56:06,049 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-12 14:56:06,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-12 14:56:06,055 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:56:06,056 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:56:06,056 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:56:06,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:56:06,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1644752152, now seen corresponding path program 1 times [2024-10-12 14:56:06,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:56:06,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138428244] [2024-10-12 14:56:06,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:56:06,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:56:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:06,201 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:56:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:56:06,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:56:06,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138428244] [2024-10-12 14:56:06,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138428244] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:56:06,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:56:06,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 14:56:06,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732306573] [2024-10-12 14:56:06,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:56:06,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 14:56:06,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:56:06,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 14:56:06,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 14:56:06,244 INFO L87 Difference]: Start difference. First operand has 35 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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) [2024-10-12 14:56:06,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:56:06,280 INFO L93 Difference]: Finished difference Result 68 states and 106 transitions. [2024-10-12 14:56:06,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 14:56:06,282 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 [2024-10-12 14:56:06,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:56:06,288 INFO L225 Difference]: With dead ends: 68 [2024-10-12 14:56:06,288 INFO L226 Difference]: Without dead ends: 33 [2024-10-12 14:56:06,291 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 [2024-10-12 14:56:06,294 INFO L432 NwaCegarLoop]: 41 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, 41 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 [2024-10-12 14:56:06,295 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:56:06,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-10-12 14:56:06,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-10-12 14:56:06,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-12 14:56:06,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2024-10-12 14:56:06,326 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 14 [2024-10-12 14:56:06,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:56:06,327 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2024-10-12 14:56:06,327 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) [2024-10-12 14:56:06,327 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2024-10-12 14:56:06,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-12 14:56:06,331 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:56:06,331 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] [2024-10-12 14:56:06,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 14:56:06,332 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:56:06,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:56:06,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1106245937, now seen corresponding path program 1 times [2024-10-12 14:56:06,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:56:06,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873952121] [2024-10-12 14:56:06,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:56:06,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:56:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:06,653 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:56:06,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:06,697 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-12 14:56:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:06,702 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-12 14:56:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:06,713 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-12 14:56:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 14:56:06,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:56:06,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873952121] [2024-10-12 14:56:06,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873952121] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:56:06,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567734838] [2024-10-12 14:56:06,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:56:06,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:56:06,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:56:06,728 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:56:06,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 14:56:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:06,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-12 14:56:06,853 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:56:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:56:06,996 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 14:56:06,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567734838] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:56:06,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 14:56:06,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-10-12 14:56:06,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096790421] [2024-10-12 14:56:06,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:56:07,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-12 14:56:07,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:56:07,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-12 14:56:07,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-12 14:56:07,003 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-12 14:56:07,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:56:07,129 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2024-10-12 14:56:07,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 14:56:07,133 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2024-10-12 14:56:07,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:56:07,134 INFO L225 Difference]: With dead ends: 76 [2024-10-12 14:56:07,134 INFO L226 Difference]: Without dead ends: 43 [2024-10-12 14:56:07,135 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-12 14:56:07,136 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:56:07,136 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 115 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:56:07,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-12 14:56:07,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2024-10-12 14:56:07,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-12 14:56:07,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2024-10-12 14:56:07,151 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 34 [2024-10-12 14:56:07,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:56:07,155 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2024-10-12 14:56:07,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-12 14:56:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2024-10-12 14:56:07,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-12 14:56:07,156 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:56:07,156 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, 1, 1] [2024-10-12 14:56:07,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-12 14:56:07,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:56:07,357 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:56:07,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:56:07,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1743944017, now seen corresponding path program 1 times [2024-10-12 14:56:07,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:56:07,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013081578] [2024-10-12 14:56:07,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:56:07,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:56:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:07,493 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:56:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:07,499 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-12 14:56:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:07,506 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-12 14:56:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:07,510 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-12 14:56:07,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:07,518 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:56:07,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:56:07,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013081578] [2024-10-12 14:56:07,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013081578] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:56:07,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:56:07,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 14:56:07,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333617392] [2024-10-12 14:56:07,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:56:07,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 14:56:07,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:56:07,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 14:56:07,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-12 14:56:07,521 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-12 14:56:07,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:56:07,566 INFO L93 Difference]: Finished difference Result 71 states and 95 transitions. [2024-10-12 14:56:07,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 14:56:07,566 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2024-10-12 14:56:07,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:56:07,567 INFO L225 Difference]: With dead ends: 71 [2024-10-12 14:56:07,567 INFO L226 Difference]: Without dead ends: 41 [2024-10-12 14:56:07,567 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-12 14:56:07,568 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 67 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 [2024-10-12 14:56:07,569 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 67 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:56:07,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-12 14:56:07,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2024-10-12 14:56:07,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-12 14:56:07,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2024-10-12 14:56:07,576 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 37 [2024-10-12 14:56:07,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:56:07,577 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2024-10-12 14:56:07,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-12 14:56:07,577 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2024-10-12 14:56:07,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-12 14:56:07,579 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:56:07,579 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, 1, 1, 1] [2024-10-12 14:56:07,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-12 14:56:07,579 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:56:07,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:56:07,579 INFO L85 PathProgramCache]: Analyzing trace with hash -190626440, now seen corresponding path program 1 times [2024-10-12 14:56:07,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:56:07,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708060735] [2024-10-12 14:56:07,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:56:07,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:56:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:07,678 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:56:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:07,681 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-12 14:56:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:07,691 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-12 14:56:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:07,696 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-12 14:56:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-12 14:56:07,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:56:07,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708060735] [2024-10-12 14:56:07,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708060735] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:56:07,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646935401] [2024-10-12 14:56:07,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:56:07,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:56:07,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:56:07,714 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:56:07,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 14:56:07,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:07,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-12 14:56:07,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:56:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 14:56:07,854 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:56:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-12 14:56:07,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646935401] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:56:07,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:56:07,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-10-12 14:56:07,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298636299] [2024-10-12 14:56:07,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:56:07,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-12 14:56:07,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:56:07,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-12 14:56:07,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-10-12 14:56:07,948 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-12 14:56:08,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:56:08,086 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2024-10-12 14:56:08,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-12 14:56:08,086 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 38 [2024-10-12 14:56:08,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:56:08,087 INFO L225 Difference]: With dead ends: 49 [2024-10-12 14:56:08,088 INFO L226 Difference]: Without dead ends: 45 [2024-10-12 14:56:08,088 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-12 14:56:08,089 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 29 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:56:08,089 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 109 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:56:08,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-12 14:56:08,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2024-10-12 14:56:08,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 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) [2024-10-12 14:56:08,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2024-10-12 14:56:08,101 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 38 [2024-10-12 14:56:08,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:56:08,101 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2024-10-12 14:56:08,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-12 14:56:08,102 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2024-10-12 14:56:08,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-12 14:56:08,103 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:56:08,103 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, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:56:08,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-12 14:56:08,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-12 14:56:08,308 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:56:08,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:56:08,308 INFO L85 PathProgramCache]: Analyzing trace with hash -465343306, now seen corresponding path program 1 times [2024-10-12 14:56:08,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:56:08,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646661893] [2024-10-12 14:56:08,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:56:08,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:56:08,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:08,486 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:56:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:08,508 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-12 14:56:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:08,511 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-12 14:56:08,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:08,514 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-12 14:56:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-12 14:56:08,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:56:08,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646661893] [2024-10-12 14:56:08,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646661893] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:56:08,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838413972] [2024-10-12 14:56:08,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:56:08,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:56:08,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:56:08,520 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:56:08,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 14:56:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:08,584 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-12 14:56:08,586 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:56:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 14:56:08,641 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:56:08,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-12 14:56:08,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838413972] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:56:08,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:56:08,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2024-10-12 14:56:08,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409207611] [2024-10-12 14:56:08,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:56:08,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-12 14:56:08,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:56:08,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-12 14:56:08,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-10-12 14:56:08,793 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-12 14:56:09,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:56:09,033 INFO L93 Difference]: Finished difference Result 77 states and 99 transitions. [2024-10-12 14:56:09,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 14:56:09,034 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 42 [2024-10-12 14:56:09,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:56:09,035 INFO L225 Difference]: With dead ends: 77 [2024-10-12 14:56:09,035 INFO L226 Difference]: Without dead ends: 45 [2024-10-12 14:56:09,035 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2024-10-12 14:56:09,036 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 58 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 14:56:09,036 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 158 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 14:56:09,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-12 14:56:09,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2024-10-12 14:56:09,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 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) [2024-10-12 14:56:09,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2024-10-12 14:56:09,052 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 42 [2024-10-12 14:56:09,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:56:09,052 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2024-10-12 14:56:09,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-12 14:56:09,053 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2024-10-12 14:56:09,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-12 14:56:09,054 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:56:09,054 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:56:09,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-12 14:56:09,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:56:09,259 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:56:09,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:56:09,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1367452082, now seen corresponding path program 2 times [2024-10-12 14:56:09,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:56:09,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257243809] [2024-10-12 14:56:09,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:56:09,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:56:09,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:09,385 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:56:09,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:09,388 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-12 14:56:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:09,392 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-12 14:56:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:09,396 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-12 14:56:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:09,400 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-12 14:56:09,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:56:09,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257243809] [2024-10-12 14:56:09,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257243809] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:56:09,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529348818] [2024-10-12 14:56:09,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:56:09,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:56:09,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:56:09,407 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:56:09,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 14:56:09,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:56:09,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:56:09,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-12 14:56:09,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:56:09,553 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-12 14:56:09,554 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:56:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-12 14:56:09,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529348818] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:56:09,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:56:09,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-12 14:56:09,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226170815] [2024-10-12 14:56:09,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:56:09,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-12 14:56:09,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:56:09,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-12 14:56:09,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-10-12 14:56:09,622 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-12 14:56:09,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:56:09,766 INFO L93 Difference]: Finished difference Result 91 states and 113 transitions. [2024-10-12 14:56:09,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-12 14:56:09,767 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2024-10-12 14:56:09,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:56:09,768 INFO L225 Difference]: With dead ends: 91 [2024-10-12 14:56:09,769 INFO L226 Difference]: Without dead ends: 61 [2024-10-12 14:56:09,769 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2024-10-12 14:56:09,770 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:56:09,771 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 160 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:56:09,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-12 14:56:09,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2024-10-12 14:56:09,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 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) [2024-10-12 14:56:09,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-10-12 14:56:09,786 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 44 [2024-10-12 14:56:09,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:56:09,786 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-10-12 14:56:09,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-12 14:56:09,786 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-10-12 14:56:09,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-12 14:56:09,787 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:56:09,787 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, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:56:09,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-12 14:56:09,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:56:09,988 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:56:09,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:56:09,989 INFO L85 PathProgramCache]: Analyzing trace with hash 160309039, now seen corresponding path program 3 times [2024-10-12 14:56:09,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:56:09,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163642741] [2024-10-12 14:56:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:56:09,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:56:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 14:56:10,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1571343996] [2024-10-12 14:56:10,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 14:56:10,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:56:10,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:56:10,017 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:56:10,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 14:56:10,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-10-12 14:56:10,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:56:10,240 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-10-12 14:56:10,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:56:10,316 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 [2024-10-12 14:56:10,356 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 [2024-10-12 14:56:10,497 INFO L349 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2024-10-12 14:56:10,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2024-10-12 14:56:10,581 INFO L349 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2024-10-12 14:56:10,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2024-10-12 14:56:11,440 INFO L349 Elim1Store]: treesize reduction 190, result has 15.6 percent of original size [2024-10-12 14:56:11,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 66 treesize of output 62 [2024-10-12 14:56:11,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:56:11,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:56:11,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:56:11,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:56:11,937 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:56:11,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 13 [2024-10-12 14:56:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 14:56:12,050 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:56:13,579 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 178 treesize of output 170 [2024-10-12 14:56:13,607 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:56:13,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79913 treesize of output 72745 [2024-10-12 14:56:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:56:14,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:56:14,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163642741] [2024-10-12 14:56:14,198 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 14:56:14,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571343996] [2024-10-12 14:56:14,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571343996] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:56:14,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 14:56:14,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 48 [2024-10-12 14:56:14,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722189091] [2024-10-12 14:56:14,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 14:56:14,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-12 14:56:14,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:56:14,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-12 14:56:14,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1906, Unknown=0, NotChecked=0, Total=2256 [2024-10-12 14:56:14,203 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 48 states, 48 states have (on average 1.625) internal successors, (78), 46 states have internal predecessors, (78), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-12 14:56:21,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:56:21,873 INFO L93 Difference]: Finished difference Result 280 states and 379 transitions. [2024-10-12 14:56:21,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-10-12 14:56:21,874 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 46 states have internal predecessors, (78), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 54 [2024-10-12 14:56:21,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:56:21,877 INFO L225 Difference]: With dead ends: 280 [2024-10-12 14:56:21,877 INFO L226 Difference]: Without dead ends: 238 [2024-10-12 14:56:21,882 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4339 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1972, Invalid=11600, Unknown=0, NotChecked=0, Total=13572 [2024-10-12 14:56:21,883 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 468 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 1974 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 2308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 1974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-10-12 14:56:21,883 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 646 Invalid, 2308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 1974 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-10-12 14:56:21,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-10-12 14:56:21,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 146. [2024-10-12 14:56:21,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 122 states have (on average 1.2868852459016393) internal successors, (157), 121 states have internal predecessors, (157), 17 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (21), 19 states have call predecessors, (21), 17 states have call successors, (21) [2024-10-12 14:56:21,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 195 transitions. [2024-10-12 14:56:21,927 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 195 transitions. Word has length 54 [2024-10-12 14:56:21,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:56:21,929 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 195 transitions. [2024-10-12 14:56:21,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 46 states have internal predecessors, (78), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-12 14:56:21,930 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 195 transitions. [2024-10-12 14:56:21,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-12 14:56:21,933 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:56:21,933 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, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:56:21,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-12 14:56:22,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:56:22,134 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:56:22,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:56:22,135 INFO L85 PathProgramCache]: Analyzing trace with hash 110261106, now seen corresponding path program 4 times [2024-10-12 14:56:22,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:56:22,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316224393] [2024-10-12 14:56:22,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:56:22,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:56:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:22,290 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:56:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:22,292 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-12 14:56:22,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:22,296 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-12 14:56:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:22,303 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-12 14:56:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-12 14:56:22,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:56:22,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316224393] [2024-10-12 14:56:22,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316224393] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:56:22,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176780069] [2024-10-12 14:56:22,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 14:56:22,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:56:22,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:56:22,316 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:56:22,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 14:56:22,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 14:56:22,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:56:22,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-12 14:56:22,381 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:56:22,461 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-12 14:56:22,462 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:56:22,526 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-12 14:56:22,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176780069] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:56:22,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:56:22,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-12 14:56:22,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137701379] [2024-10-12 14:56:22,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:56:22,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 14:56:22,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:56:22,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 14:56:22,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-12 14:56:22,528 INFO L87 Difference]: Start difference. First operand 146 states and 195 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-12 14:56:22,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:56:22,690 INFO L93 Difference]: Finished difference Result 397 states and 536 transitions. [2024-10-12 14:56:22,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-12 14:56:22,691 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 55 [2024-10-12 14:56:22,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:56:22,693 INFO L225 Difference]: With dead ends: 397 [2024-10-12 14:56:22,694 INFO L226 Difference]: Without dead ends: 256 [2024-10-12 14:56:22,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 108 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-10-12 14:56:22,695 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 11 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:56:22,696 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 214 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:56:22,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-10-12 14:56:22,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 232. [2024-10-12 14:56:22,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 191 states have (on average 1.2617801047120418) internal successors, (241), 189 states have internal predecessors, (241), 29 states have call successors, (29), 9 states have call predecessors, (29), 11 states have return successors, (37), 33 states have call predecessors, (37), 29 states have call successors, (37) [2024-10-12 14:56:22,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 307 transitions. [2024-10-12 14:56:22,769 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 307 transitions. Word has length 55 [2024-10-12 14:56:22,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:56:22,769 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 307 transitions. [2024-10-12 14:56:22,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-12 14:56:22,770 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 307 transitions. [2024-10-12 14:56:22,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-12 14:56:22,772 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:56:22,772 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:56:22,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-12 14:56:22,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:56:22,973 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:56:22,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:56:22,974 INFO L85 PathProgramCache]: Analyzing trace with hash 669382493, now seen corresponding path program 5 times [2024-10-12 14:56:22,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:56:22,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102385877] [2024-10-12 14:56:22,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:56:22,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:56:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:23,154 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:56:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:23,157 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-12 14:56:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:23,160 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-12 14:56:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:23,162 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-12 14:56:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-10-12 14:56:23,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:56:23,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102385877] [2024-10-12 14:56:23,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102385877] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:56:23,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583909] [2024-10-12 14:56:23,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 14:56:23,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:56:23,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:56:23,167 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:56:23,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-12 14:56:23,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-12 14:56:23,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:56:23,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-12 14:56:23,244 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:56:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-10-12 14:56:23,314 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:56:23,390 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-10-12 14:56:23,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583909] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:56:23,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:56:23,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-10-12 14:56:23,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004992660] [2024-10-12 14:56:23,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:56:23,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-12 14:56:23,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:56:23,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-12 14:56:23,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2024-10-12 14:56:23,392 INFO L87 Difference]: Start difference. First operand 232 states and 307 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-12 14:56:23,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:56:23,590 INFO L93 Difference]: Finished difference Result 360 states and 459 transitions. [2024-10-12 14:56:23,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-12 14:56:23,592 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2024-10-12 14:56:23,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:56:23,594 INFO L225 Difference]: With dead ends: 360 [2024-10-12 14:56:23,594 INFO L226 Difference]: Without dead ends: 222 [2024-10-12 14:56:23,595 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2024-10-12 14:56:23,597 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:56:23,598 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 168 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:56:23,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-10-12 14:56:23,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 187. [2024-10-12 14:56:23,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 154 states have (on average 1.2337662337662338) internal successors, (190), 153 states have internal predecessors, (190), 21 states have call successors, (21), 9 states have call predecessors, (21), 11 states have return successors, (27), 24 states have call predecessors, (27), 21 states have call successors, (27) [2024-10-12 14:56:23,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 238 transitions. [2024-10-12 14:56:23,647 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 238 transitions. Word has length 58 [2024-10-12 14:56:23,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:56:23,647 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 238 transitions. [2024-10-12 14:56:23,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-12 14:56:23,648 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 238 transitions. [2024-10-12 14:56:23,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-12 14:56:23,649 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:56:23,649 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:56:23,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-12 14:56:23,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:56:23,850 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:56:23,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:56:23,851 INFO L85 PathProgramCache]: Analyzing trace with hash -2032202519, now seen corresponding path program 1 times [2024-10-12 14:56:23,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:56:23,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361880338] [2024-10-12 14:56:23,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:56:23,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:56:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:23,926 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:56:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:23,928 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-12 14:56:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:23,933 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-12 14:56:23,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:23,935 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-12 14:56:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:23,937 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-12 14:56:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:23,951 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-10-12 14:56:23,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:56:23,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361880338] [2024-10-12 14:56:23,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361880338] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:56:23,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:56:23,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 14:56:23,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924277636] [2024-10-12 14:56:23,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:56:23,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 14:56:23,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:56:23,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 14:56:23,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 14:56:23,953 INFO L87 Difference]: Start difference. First operand 187 states and 238 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-10-12 14:56:24,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:56:24,015 INFO L93 Difference]: Finished difference Result 275 states and 352 transitions. [2024-10-12 14:56:24,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 14:56:24,016 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 60 [2024-10-12 14:56:24,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:56:24,018 INFO L225 Difference]: With dead ends: 275 [2024-10-12 14:56:24,019 INFO L226 Difference]: Without dead ends: 201 [2024-10-12 14:56:24,020 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 14:56:24,021 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:56:24,022 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 144 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:56:24,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-10-12 14:56:24,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2024-10-12 14:56:24,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 163 states have (on average 1.2208588957055215) internal successors, (199), 159 states have internal predecessors, (199), 21 states have call successors, (21), 9 states have call predecessors, (21), 13 states have return successors, (31), 29 states have call predecessors, (31), 21 states have call successors, (31) [2024-10-12 14:56:24,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 251 transitions. [2024-10-12 14:56:24,071 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 251 transitions. Word has length 60 [2024-10-12 14:56:24,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:56:24,071 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 251 transitions. [2024-10-12 14:56:24,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-10-12 14:56:24,071 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 251 transitions. [2024-10-12 14:56:24,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-12 14:56:24,072 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:56:24,073 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:56:24,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-12 14:56:24,073 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:56:24,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:56:24,073 INFO L85 PathProgramCache]: Analyzing trace with hash 224708488, now seen corresponding path program 1 times [2024-10-12 14:56:24,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:56:24,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531918900] [2024-10-12 14:56:24,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:56:24,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:56:24,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:24,280 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:56:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:24,282 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-12 14:56:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:24,309 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-12 14:56:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:24,315 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-12 14:56:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:24,368 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-12 14:56:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:24,371 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-12 14:56:24,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:56:24,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531918900] [2024-10-12 14:56:24,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531918900] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:56:24,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984857942] [2024-10-12 14:56:24,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:56:24,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:56:24,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:56:24,374 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:56:24,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-12 14:56:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:24,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-12 14:56:24,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:56:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-12 14:56:24,630 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:56:24,818 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-12 14:56:24,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984857942] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:56:24,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:56:24,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 22 [2024-10-12 14:56:24,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103765029] [2024-10-12 14:56:24,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:56:24,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-12 14:56:24,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:56:24,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-12 14:56:24,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2024-10-12 14:56:24,820 INFO L87 Difference]: Start difference. First operand 198 states and 251 transitions. Second operand has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 6 states have call successors, (12), 3 states have call predecessors, (12), 8 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2024-10-12 14:56:25,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:56:25,093 INFO L93 Difference]: Finished difference Result 272 states and 332 transitions. [2024-10-12 14:56:25,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-12 14:56:25,093 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 6 states have call successors, (12), 3 states have call predecessors, (12), 8 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 60 [2024-10-12 14:56:25,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:56:25,095 INFO L225 Difference]: With dead ends: 272 [2024-10-12 14:56:25,095 INFO L226 Difference]: Without dead ends: 176 [2024-10-12 14:56:25,096 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 113 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2024-10-12 14:56:25,096 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 39 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 14:56:25,096 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 242 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 14:56:25,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-10-12 14:56:25,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 157. [2024-10-12 14:56:25,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 133 states have (on average 1.2030075187969924) internal successors, (160), 133 states have internal predecessors, (160), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (17), 15 states have call predecessors, (17), 13 states have call successors, (17) [2024-10-12 14:56:25,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 190 transitions. [2024-10-12 14:56:25,136 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 190 transitions. Word has length 60 [2024-10-12 14:56:25,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:56:25,136 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 190 transitions. [2024-10-12 14:56:25,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 6 states have call successors, (12), 3 states have call predecessors, (12), 8 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2024-10-12 14:56:25,136 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 190 transitions. [2024-10-12 14:56:25,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-10-12 14:56:25,137 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:56:25,137 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:56:25,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-12 14:56:25,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-12 14:56:25,338 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:56:25,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:56:25,339 INFO L85 PathProgramCache]: Analyzing trace with hash -125029806, now seen corresponding path program 6 times [2024-10-12 14:56:25,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:56:25,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583690324] [2024-10-12 14:56:25,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:56:25,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:56:25,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:25,483 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:56:25,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:25,486 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-12 14:56:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:25,487 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-12 14:56:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:25,490 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-12 14:56:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-10-12 14:56:25,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:56:25,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583690324] [2024-10-12 14:56:25,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583690324] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:56:25,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353531446] [2024-10-12 14:56:25,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-12 14:56:25,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:56:25,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:56:25,495 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:56:25,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-12 14:56:25,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-10-12 14:56:25,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:56:25,597 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-12 14:56:25,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:56:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 44 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-12 14:56:25,687 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:56:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-10-12 14:56:25,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353531446] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:56:25,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:56:25,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-10-12 14:56:25,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846455329] [2024-10-12 14:56:25,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:56:25,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-12 14:56:25,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:56:25,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-12 14:56:25,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2024-10-12 14:56:25,756 INFO L87 Difference]: Start difference. First operand 157 states and 190 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-12 14:56:25,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:56:25,930 INFO L93 Difference]: Finished difference Result 197 states and 232 transitions. [2024-10-12 14:56:25,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-12 14:56:25,930 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 64 [2024-10-12 14:56:25,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:56:25,932 INFO L225 Difference]: With dead ends: 197 [2024-10-12 14:56:25,932 INFO L226 Difference]: Without dead ends: 110 [2024-10-12 14:56:25,932 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2024-10-12 14:56:25,933 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 32 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:56:25,933 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 256 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:56:25,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-10-12 14:56:25,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2024-10-12 14:56:25,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 92 states have internal predecessors, (111), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (13), 12 states have call predecessors, (13), 9 states have call successors, (13) [2024-10-12 14:56:25,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 133 transitions. [2024-10-12 14:56:25,964 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 133 transitions. Word has length 64 [2024-10-12 14:56:25,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:56:25,964 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 133 transitions. [2024-10-12 14:56:25,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-12 14:56:25,965 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 133 transitions. [2024-10-12 14:56:25,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-12 14:56:25,966 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:56:25,966 INFO L215 NwaCegarLoop]: trace histogram [9, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:56:25,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-12 14:56:26,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:56:26,167 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:56:26,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:56:26,167 INFO L85 PathProgramCache]: Analyzing trace with hash -2146777757, now seen corresponding path program 2 times [2024-10-12 14:56:26,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:56:26,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033626652] [2024-10-12 14:56:26,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:56:26,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:56:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:26,301 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 14:56:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:26,303 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-12 14:56:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:26,307 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-12 14:56:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:26,310 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-12 14:56:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:26,324 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-10-12 14:56:26,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-10-12 14:56:26,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:56:26,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033626652] [2024-10-12 14:56:26,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033626652] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:56:26,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752681929] [2024-10-12 14:56:26,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:56:26,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:56:26,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:56:26,329 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:56:26,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-12 14:56:26,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:56:26,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:56:26,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-12 14:56:26,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:56:26,522 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-12 14:56:26,523 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:56:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-10-12 14:56:26,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752681929] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:56:26,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:56:26,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-12 14:56:26,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407371297] [2024-10-12 14:56:26,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:56:26,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 14:56:26,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:56:26,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 14:56:26,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-12 14:56:26,623 INFO L87 Difference]: Start difference. First operand 110 states and 133 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-10-12 14:56:26,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:56:26,747 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2024-10-12 14:56:26,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 14:56:26,748 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 68 [2024-10-12 14:56:26,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:56:26,749 INFO L225 Difference]: With dead ends: 114 [2024-10-12 14:56:26,749 INFO L226 Difference]: Without dead ends: 103 [2024-10-12 14:56:26,749 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 135 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2024-10-12 14:56:26,750 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:56:26,750 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 85 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:56:26,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-12 14:56:26,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2024-10-12 14:56:26,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (13), 12 states have call predecessors, (13), 9 states have call successors, (13) [2024-10-12 14:56:26,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 119 transitions. [2024-10-12 14:56:26,774 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 119 transitions. Word has length 68 [2024-10-12 14:56:26,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:56:26,775 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 119 transitions. [2024-10-12 14:56:26,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-10-12 14:56:26,775 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 119 transitions. [2024-10-12 14:56:26,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-12 14:56:26,776 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:56:26,776 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, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:56:26,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-12 14:56:26,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-12 14:56:26,977 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:56:26,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:56:26,977 INFO L85 PathProgramCache]: Analyzing trace with hash 986345860, now seen corresponding path program 7 times [2024-10-12 14:56:26,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:56:26,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519521260] [2024-10-12 14:56:26,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:56:26,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:56:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 14:56:27,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1494896876] [2024-10-12 14:56:27,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-12 14:56:27,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:56:27,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:56:27,014 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:56:27,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-12 14:56:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:56:28,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-10-12 14:56:28,540 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:56:28,573 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 [2024-10-12 14:56:28,603 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 [2024-10-12 14:56:28,636 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:56:28,636 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 [2024-10-12 14:56:28,807 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:56:28,808 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 [2024-10-12 14:56:28,864 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:56:28,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2024-10-12 14:56:28,924 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:56:28,924 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 47 treesize of output 58 [2024-10-12 14:56:29,084 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:56:29,084 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 [2024-10-12 14:56:29,168 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:56:29,169 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 [2024-10-12 14:56:29,250 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:56:29,251 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 [2024-10-12 14:56:30,442 INFO L349 Elim1Store]: treesize reduction 324, result has 16.5 percent of original size [2024-10-12 14:56:30,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 54 case distinctions, treesize of input 91 treesize of output 104 [2024-10-12 14:56:31,758 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 8 proven. 150 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 14:56:31,759 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:56:40,600 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 1217 treesize of output 1199 [2024-10-12 14:56:44,577 INFO L349 Elim1Store]: treesize reduction 50, result has 78.4 percent of original size [2024-10-12 14:56:44,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input -4317422871412919181 treesize of output -4317422871412919001