./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array5_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-patterns/array5_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 3dd3ea9d30e76cbd39a744e53feb2b89c359b5b85c7df24161ceaf060cda3b02 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 10:09:03,990 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 10:09:04,063 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 10:09:04,072 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 10:09:04,073 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 10:09:04,101 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 10:09:04,101 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 10:09:04,102 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 10:09:04,102 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 10:09:04,104 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 10:09:04,104 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 10:09:04,105 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 10:09:04,105 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 10:09:04,107 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 10:09:04,107 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 10:09:04,108 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 10:09:04,108 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 10:09:04,108 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 10:09:04,108 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 10:09:04,109 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 10:09:04,109 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 10:09:04,109 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 10:09:04,110 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 10:09:04,110 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 10:09:04,110 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 10:09:04,110 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 10:09:04,111 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 10:09:04,111 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 10:09:04,111 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 10:09:04,111 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 10:09:04,112 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 10:09:04,112 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 10:09:04,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 10:09:04,115 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 10:09:04,116 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 10:09:04,116 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 10:09:04,116 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 10:09:04,116 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 10:09:04,116 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 10:09:04,117 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 10:09:04,117 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 10:09:04,117 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 10:09:04,117 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3dd3ea9d30e76cbd39a744e53feb2b89c359b5b85c7df24161ceaf060cda3b02 [2024-11-08 10:09:04,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 10:09:04,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 10:09:04,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 10:09:04,407 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 10:09:04,408 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 10:09:04,409 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array5_pattern.c [2024-11-08 10:09:05,868 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 10:09:06,027 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 10:09:06,030 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array5_pattern.c [2024-11-08 10:09:06,039 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5409284d8/bef53d15e3b0435d98c03df87516b773/FLAG2ebcf3a53 [2024-11-08 10:09:06,421 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5409284d8/bef53d15e3b0435d98c03df87516b773 [2024-11-08 10:09:06,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 10:09:06,424 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 10:09:06,425 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 10:09:06,425 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 10:09:06,430 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 10:09:06,431 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 10:09:06" (1/1) ... [2024-11-08 10:09:06,432 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64cb1677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:09:06, skipping insertion in model container [2024-11-08 10:09:06,433 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 10:09:06" (1/1) ... [2024-11-08 10:09:06,456 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 10:09:06,628 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array5_pattern.c[1890,1903] [2024-11-08 10:09:06,646 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 10:09:06,653 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 10:09:06,665 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array5_pattern.c[1890,1903] [2024-11-08 10:09:06,674 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 10:09:06,692 INFO L204 MainTranslator]: Completed translation [2024-11-08 10:09:06,693 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:09:06 WrapperNode [2024-11-08 10:09:06,693 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 10:09:06,694 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 10:09:06,695 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 10:09:06,695 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 10:09:06,706 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:09:06" (1/1) ... [2024-11-08 10:09:06,721 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:09:06" (1/1) ... [2024-11-08 10:09:06,753 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 87 [2024-11-08 10:09:06,753 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 10:09:06,754 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 10:09:06,754 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 10:09:06,754 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 10:09:06,765 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:09:06" (1/1) ... [2024-11-08 10:09:06,766 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:09:06" (1/1) ... [2024-11-08 10:09:06,769 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:09:06" (1/1) ... [2024-11-08 10:09:06,791 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 6 writes are split as follows [0, 3, 3]. [2024-11-08 10:09:06,791 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:09:06" (1/1) ... [2024-11-08 10:09:06,791 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:09:06" (1/1) ... [2024-11-08 10:09:06,800 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:09:06" (1/1) ... [2024-11-08 10:09:06,806 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:09:06" (1/1) ... [2024-11-08 10:09:06,807 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:09:06" (1/1) ... [2024-11-08 10:09:06,808 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:09:06" (1/1) ... [2024-11-08 10:09:06,810 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 10:09:06,815 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 10:09:06,815 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 10:09:06,815 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 10:09:06,816 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:09:06" (1/1) ... [2024-11-08 10:09:06,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 10:09:06,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:09:06,846 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 10:09:06,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 10:09:06,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 10:09:06,885 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-08 10:09:06,885 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-08 10:09:06,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 10:09:06,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 10:09:06,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 10:09:06,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 10:09:06,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 10:09:06,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 10:09:06,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 10:09:06,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 10:09:06,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 10:09:06,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 10:09:06,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 10:09:06,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 10:09:06,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 10:09:06,964 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 10:09:06,965 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 10:09:07,187 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-11-08 10:09:07,187 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 10:09:07,203 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 10:09:07,204 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-08 10:09:07,204 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 10:09:07 BoogieIcfgContainer [2024-11-08 10:09:07,204 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 10:09:07,207 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 10:09:07,207 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 10:09:07,210 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 10:09:07,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 10:09:06" (1/3) ... [2024-11-08 10:09:07,211 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74515f07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 10:09:07, skipping insertion in model container [2024-11-08 10:09:07,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:09:06" (2/3) ... [2024-11-08 10:09:07,211 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74515f07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 10:09:07, skipping insertion in model container [2024-11-08 10:09:07,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 10:09:07" (3/3) ... [2024-11-08 10:09:07,213 INFO L112 eAbstractionObserver]: Analyzing ICFG array5_pattern.c [2024-11-08 10:09:07,228 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 10:09:07,228 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 10:09:07,285 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 10:09:07,292 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;@781da8e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 10:09:07,292 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 10:09:07,297 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:09:07,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-08 10:09:07,304 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:09:07,305 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:09:07,306 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:09:07,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:09:07,312 INFO L85 PathProgramCache]: Analyzing trace with hash -895237295, now seen corresponding path program 1 times [2024-11-08 10:09:07,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:09:07,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726590976] [2024-11-08 10:09:07,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:07,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:09:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:07,503 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:09:07,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:09:07,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:09:07,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726590976] [2024-11-08 10:09:07,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726590976] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:09:07,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:09:07,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 10:09:07,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891345892] [2024-11-08 10:09:07,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:09:07,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 10:09:07,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:09:07,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 10:09:07,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 10:09:07,549 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2024-11-08 10:09:07,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:09:07,568 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2024-11-08 10:09:07,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 10:09:07,571 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 16 [2024-11-08 10:09:07,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:09:07,577 INFO L225 Difference]: With dead ends: 53 [2024-11-08 10:09:07,577 INFO L226 Difference]: Without dead ends: 24 [2024-11-08 10:09:07,580 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 [2024-11-08 10:09:07,583 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 10:09:07,586 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:09:07,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-08 10:09:07,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-08 10:09:07,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:09:07,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2024-11-08 10:09:07,625 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2024-11-08 10:09:07,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:09:07,626 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2024-11-08 10:09:07,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2024-11-08 10:09:07,627 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2024-11-08 10:09:07,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-08 10:09:07,629 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:09:07,630 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:09:07,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 10:09:07,631 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:09:07,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:09:07,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1784981309, now seen corresponding path program 1 times [2024-11-08 10:09:07,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:09:07,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61967883] [2024-11-08 10:09:07,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:07,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:09:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:07,845 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:09:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:07,851 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-08 10:09:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:09:07,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:09:07,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61967883] [2024-11-08 10:09:07,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61967883] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:09:07,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:09:07,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 10:09:07,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274185150] [2024-11-08 10:09:07,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:09:07,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 10:09:07,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:09:07,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 10:09:07,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 10:09:07,875 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:09:07,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:09:07,926 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2024-11-08 10:09:07,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 10:09:07,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2024-11-08 10:09:07,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:09:07,928 INFO L225 Difference]: With dead ends: 46 [2024-11-08 10:09:07,928 INFO L226 Difference]: Without dead ends: 29 [2024-11-08 10:09:07,929 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 10:09:07,930 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 10:09:07,930 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 39 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:09:07,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-08 10:09:07,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2024-11-08 10:09:07,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 10:09:07,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2024-11-08 10:09:07,941 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 25 [2024-11-08 10:09:07,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:09:07,942 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2024-11-08 10:09:07,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:09:07,943 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2024-11-08 10:09:07,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-08 10:09:07,944 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:09:07,944 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:09:07,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 10:09:07,944 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:09:07,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:09:07,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1700639361, now seen corresponding path program 1 times [2024-11-08 10:09:07,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:09:07,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711766297] [2024-11-08 10:09:07,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:07,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:09:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:08,118 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:09:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:08,122 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-08 10:09:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:09:08,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:09:08,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711766297] [2024-11-08 10:09:08,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711766297] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:09:08,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:09:08,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 10:09:08,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692837890] [2024-11-08 10:09:08,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:09:08,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 10:09:08,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:09:08,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 10:09:08,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 10:09:08,140 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:09:08,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:09:08,162 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2024-11-08 10:09:08,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 10:09:08,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2024-11-08 10:09:08,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:09:08,163 INFO L225 Difference]: With dead ends: 33 [2024-11-08 10:09:08,163 INFO L226 Difference]: Without dead ends: 29 [2024-11-08 10:09:08,163 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 10:09:08,164 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 10:09:08,165 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 64 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:09:08,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-08 10:09:08,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-08 10:09:08,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 10:09:08,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-11-08 10:09:08,174 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 25 [2024-11-08 10:09:08,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:09:08,174 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-11-08 10:09:08,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:09:08,175 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-11-08 10:09:08,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-08 10:09:08,175 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:09:08,176 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:09:08,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 10:09:08,176 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:09:08,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:09:08,177 INFO L85 PathProgramCache]: Analyzing trace with hash -2014879741, now seen corresponding path program 1 times [2024-11-08 10:09:08,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:09:08,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601167738] [2024-11-08 10:09:08,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:08,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:09:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:08,332 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:09:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:08,336 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-08 10:09:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:08,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:09:08,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:09:08,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601167738] [2024-11-08 10:09:08,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601167738] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:09:08,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:09:08,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 10:09:08,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967525265] [2024-11-08 10:09:08,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:09:08,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 10:09:08,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:09:08,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 10:09:08,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 10:09:08,346 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:09:08,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:09:08,462 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2024-11-08 10:09:08,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 10:09:08,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2024-11-08 10:09:08,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:09:08,480 INFO L225 Difference]: With dead ends: 57 [2024-11-08 10:09:08,480 INFO L226 Difference]: Without dead ends: 33 [2024-11-08 10:09:08,481 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 10:09:08,481 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:09:08,482 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 72 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:09:08,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-08 10:09:08,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2024-11-08 10:09:08,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 10:09:08,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2024-11-08 10:09:08,492 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 27 [2024-11-08 10:09:08,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:09:08,493 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2024-11-08 10:09:08,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:09:08,493 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2024-11-08 10:09:08,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-08 10:09:08,495 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:09:08,495 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-08 10:09:08,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 10:09:08,496 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:09:08,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:09:08,497 INFO L85 PathProgramCache]: Analyzing trace with hash -466701503, now seen corresponding path program 1 times [2024-11-08 10:09:08,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:09:08,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877889770] [2024-11-08 10:09:08,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:08,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:09:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 10:09:08,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187571440] [2024-11-08 10:09:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:08,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:08,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:09:08,541 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:09:08,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 10:09:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:08,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-08 10:09:08,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:09:08,880 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 9 [2024-11-08 10:09:08,887 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 [2024-11-08 10:09:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:09:09,026 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:09:09,116 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 33 treesize of output 31 [2024-11-08 10:09:09,119 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 31 treesize of output 29 [2024-11-08 10:09:09,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 47 [2024-11-08 10:09:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 10:09:09,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:09:09,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877889770] [2024-11-08 10:09:09,626 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 10:09:09,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187571440] [2024-11-08 10:09:09,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187571440] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:09:09,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 10:09:09,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2024-11-08 10:09:09,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337255293] [2024-11-08 10:09:09,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 10:09:09,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-08 10:09:09,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:09:09,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-08 10:09:09,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-11-08 10:09:09,630 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 10:09:10,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:09:10,543 INFO L93 Difference]: Finished difference Result 101 states and 127 transitions. [2024-11-08 10:09:10,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-08 10:09:10,543 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2024-11-08 10:09:10,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:09:10,545 INFO L225 Difference]: With dead ends: 101 [2024-11-08 10:09:10,545 INFO L226 Difference]: Without dead ends: 75 [2024-11-08 10:09:10,546 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=292, Invalid=1348, Unknown=0, NotChecked=0, Total=1640 [2024-11-08 10:09:10,548 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 99 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 10:09:10,548 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 246 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 10:09:10,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-08 10:09:10,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2024-11-08 10:09:10,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 49 states have internal predecessors, (59), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 10:09:10,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2024-11-08 10:09:10,560 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 29 [2024-11-08 10:09:10,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:09:10,561 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2024-11-08 10:09:10,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 10:09:10,561 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2024-11-08 10:09:10,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-08 10:09:10,562 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:09:10,562 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-08 10:09:10,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 10:09:10,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:10,767 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:09:10,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:09:10,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1273900799, now seen corresponding path program 2 times [2024-11-08 10:09:10,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:09:10,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554755303] [2024-11-08 10:09:10,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:10,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:09:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:10,895 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:09:10,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:10,898 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-08 10:09:10,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:10,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:09:10,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:09:10,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554755303] [2024-11-08 10:09:10,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554755303] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:09:10,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114824228] [2024-11-08 10:09:10,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:09:10,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:10,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:09:10,904 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:09:10,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 10:09:10,967 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:09:10,968 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:09:10,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 10:09:10,970 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:09:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:09:11,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:09:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:09:11,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114824228] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:09:11,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:09:11,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-08 10:09:11,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842050898] [2024-11-08 10:09:11,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:09:11,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 10:09:11,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:09:11,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 10:09:11,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-08 10:09:11,095 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 10:09:11,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:09:11,231 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2024-11-08 10:09:11,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 10:09:11,232 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-11-08 10:09:11,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:09:11,233 INFO L225 Difference]: With dead ends: 92 [2024-11-08 10:09:11,233 INFO L226 Difference]: Without dead ends: 74 [2024-11-08 10:09:11,233 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-08 10:09:11,234 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 39 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:09:11,234 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 102 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:09:11,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-08 10:09:11,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2024-11-08 10:09:11,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 10:09:11,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2024-11-08 10:09:11,249 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 31 [2024-11-08 10:09:11,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:09:11,249 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2024-11-08 10:09:11,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 10:09:11,249 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2024-11-08 10:09:11,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-08 10:09:11,250 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:09:11,250 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-08 10:09:11,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 10:09:11,451 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,SelfDestructingSolverStorable5 [2024-11-08 10:09:11,451 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:09:11,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:09:11,452 INFO L85 PathProgramCache]: Analyzing trace with hash 206222593, now seen corresponding path program 3 times [2024-11-08 10:09:11,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:09:11,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124447863] [2024-11-08 10:09:11,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:11,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:09:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 10:09:11,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423377515] [2024-11-08 10:09:11,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 10:09:11,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:11,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:09:11,495 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:09:11,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 10:09:11,570 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-08 10:09:11,571 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:09:11,573 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-08 10:09:11,577 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:09:11,682 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 13 treesize of output 9 [2024-11-08 10:09:11,690 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 13 treesize of output 9 [2024-11-08 10:09:12,350 INFO L349 Elim1Store]: treesize reduction 48, result has 42.2 percent of original size [2024-11-08 10:09:12,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 50 [2024-11-08 10:09:12,403 INFO L349 Elim1Store]: treesize reduction 52, result has 40.2 percent of original size [2024-11-08 10:09:12,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 52 [2024-11-08 10:09:13,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:13,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:13,256 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 10:09:13,256 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 10:09:13,267 INFO L349 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2024-11-08 10:09:13,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 22 [2024-11-08 10:09:13,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:13,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:13,278 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 10:09:13,278 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 10:09:13,285 INFO L349 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2024-11-08 10:09:13,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 18 [2024-11-08 10:09:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:09:13,374 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:09:24,068 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 36 treesize of output 34 [2024-11-08 10:09:24,075 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 34 treesize of output 32 [2024-11-08 10:09:24,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2024-11-08 10:09:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 10:09:24,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:09:24,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124447863] [2024-11-08 10:09:24,245 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 10:09:24,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423377515] [2024-11-08 10:09:24,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423377515] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:09:24,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 10:09:24,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 39 [2024-11-08 10:09:24,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569243178] [2024-11-08 10:09:24,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 10:09:24,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-08 10:09:24,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:09:24,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-08 10:09:24,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1261, Unknown=2, NotChecked=0, Total=1482 [2024-11-08 10:09:24,248 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 39 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 35 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-08 10:09:34,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:09:34,916 INFO L93 Difference]: Finished difference Result 278 states and 359 transitions. [2024-11-08 10:09:34,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2024-11-08 10:09:34,917 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 35 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2024-11-08 10:09:34,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:09:34,920 INFO L225 Difference]: With dead ends: 278 [2024-11-08 10:09:34,920 INFO L226 Difference]: Without dead ends: 244 [2024-11-08 10:09:34,926 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5143 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=2547, Invalid=13201, Unknown=2, NotChecked=0, Total=15750 [2024-11-08 10:09:34,927 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 388 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-08 10:09:34,928 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 451 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-08 10:09:34,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2024-11-08 10:09:34,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 159. [2024-11-08 10:09:34,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 135 states have (on average 1.2962962962962963) internal successors, (175), 135 states have internal predecessors, (175), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-08 10:09:34,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 211 transitions. [2024-11-08 10:09:34,974 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 211 transitions. Word has length 33 [2024-11-08 10:09:34,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:09:34,975 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 211 transitions. [2024-11-08 10:09:34,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 35 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-08 10:09:34,975 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 211 transitions. [2024-11-08 10:09:34,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-08 10:09:34,977 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:09:34,977 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-08 10:09:34,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 10:09:35,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:35,178 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:09:35,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:09:35,178 INFO L85 PathProgramCache]: Analyzing trace with hash -380583421, now seen corresponding path program 1 times [2024-11-08 10:09:35,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:09:35,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979108931] [2024-11-08 10:09:35,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:35,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:09:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 10:09:35,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272702023] [2024-11-08 10:09:35,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:35,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:35,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:09:35,255 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:09:35,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 10:09:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:35,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-08 10:09:35,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:09:35,357 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 [2024-11-08 10:09:35,366 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 [2024-11-08 10:09:35,422 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 [2024-11-08 10:09:35,433 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 [2024-11-08 10:09:35,783 INFO L349 Elim1Store]: treesize reduction 88, result has 33.8 percent of original size [2024-11-08 10:09:35,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 68 [2024-11-08 10:09:35,834 INFO L349 Elim1Store]: treesize reduction 80, result has 36.0 percent of original size [2024-11-08 10:09:35,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 66 [2024-11-08 10:09:36,402 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:36,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 106 [2024-11-08 10:09:36,421 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:36,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 79 [2024-11-08 10:09:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:09:36,560 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:09:37,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:09:37,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979108931] [2024-11-08 10:09:37,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 10:09:37,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272702023] [2024-11-08 10:09:37,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272702023] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:09:37,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 10:09:37,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-08 10:09:37,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256666009] [2024-11-08 10:09:37,936 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 10:09:37,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-08 10:09:37,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:09:37,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-08 10:09:37,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2024-11-08 10:09:37,937 INFO L87 Difference]: Start difference. First operand 159 states and 211 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:09:38,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:09:38,363 INFO L93 Difference]: Finished difference Result 184 states and 240 transitions. [2024-11-08 10:09:38,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-08 10:09:38,363 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2024-11-08 10:09:38,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:09:38,366 INFO L225 Difference]: With dead ends: 184 [2024-11-08 10:09:38,366 INFO L226 Difference]: Without dead ends: 180 [2024-11-08 10:09:38,366 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2024-11-08 10:09:38,367 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 18 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 10:09:38,367 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 266 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 10:09:38,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-11-08 10:09:38,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 166. [2024-11-08 10:09:38,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 140 states have (on average 1.292857142857143) internal successors, (181), 140 states have internal predecessors, (181), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-08 10:09:38,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 219 transitions. [2024-11-08 10:09:38,415 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 219 transitions. Word has length 33 [2024-11-08 10:09:38,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:09:38,418 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 219 transitions. [2024-11-08 10:09:38,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:09:38,419 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 219 transitions. [2024-11-08 10:09:38,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-08 10:09:38,420 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:09:38,420 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:09:38,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-08 10:09:38,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:38,625 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:09:38,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:09:38,625 INFO L85 PathProgramCache]: Analyzing trace with hash -615213307, now seen corresponding path program 2 times [2024-11-08 10:09:38,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:09:38,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141161937] [2024-11-08 10:09:38,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:38,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:09:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:38,809 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:09:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:38,813 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-08 10:09:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:38,817 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:09:38,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:09:38,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141161937] [2024-11-08 10:09:38,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141161937] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:09:38,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374492655] [2024-11-08 10:09:38,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:09:38,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:38,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:09:38,820 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:09:38,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 10:09:38,893 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:09:38,894 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:09:38,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 10:09:38,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:09:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:09:38,976 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:09:39,026 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:09:39,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374492655] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:09:39,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:09:39,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-08 10:09:39,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053100258] [2024-11-08 10:09:39,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:09:39,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 10:09:39,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:09:39,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 10:09:39,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-08 10:09:39,029 INFO L87 Difference]: Start difference. First operand 166 states and 219 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 10:09:39,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:09:39,315 INFO L93 Difference]: Finished difference Result 321 states and 424 transitions. [2024-11-08 10:09:39,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 10:09:39,315 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-11-08 10:09:39,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:09:39,317 INFO L225 Difference]: With dead ends: 321 [2024-11-08 10:09:39,317 INFO L226 Difference]: Without dead ends: 234 [2024-11-08 10:09:39,318 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-11-08 10:09:39,319 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 105 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:09:39,319 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 118 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 10:09:39,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-11-08 10:09:39,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 214. [2024-11-08 10:09:39,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 180 states have (on average 1.2277777777777779) internal successors, (221), 180 states have internal predecessors, (221), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-08 10:09:39,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 273 transitions. [2024-11-08 10:09:39,363 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 273 transitions. Word has length 35 [2024-11-08 10:09:39,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:09:39,363 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 273 transitions. [2024-11-08 10:09:39,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 10:09:39,364 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 273 transitions. [2024-11-08 10:09:39,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-08 10:09:39,365 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:09:39,365 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:09:39,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 10:09:39,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:39,566 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:09:39,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:09:39,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1702164417, now seen corresponding path program 4 times [2024-11-08 10:09:39,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:09:39,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768371265] [2024-11-08 10:09:39,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:39,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:09:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 10:09:39,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015911894] [2024-11-08 10:09:39,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 10:09:39,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:39,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:09:39,593 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:09:39,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 10:09:39,676 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 10:09:39,676 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:09:39,677 WARN L253 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-08 10:09:39,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:09:39,716 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 [2024-11-08 10:09:39,729 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 [2024-11-08 10:09:39,800 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 [2024-11-08 10:09:39,815 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 [2024-11-08 10:09:39,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:39,923 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 [2024-11-08 10:09:39,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:39,946 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 [2024-11-08 10:09:40,575 INFO L349 Elim1Store]: treesize reduction 132, result has 33.7 percent of original size [2024-11-08 10:09:40,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 96 [2024-11-08 10:09:40,649 INFO L349 Elim1Store]: treesize reduction 120, result has 35.8 percent of original size [2024-11-08 10:09:40,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 94 [2024-11-08 10:09:41,552 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:41,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 145 treesize of output 109 [2024-11-08 10:09:41,631 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:09:41,631 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:09:42,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:09:42,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768371265] [2024-11-08 10:09:42,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 10:09:42,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015911894] [2024-11-08 10:09:42,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015911894] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:09:42,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 10:09:42,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-11-08 10:09:42,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021700838] [2024-11-08 10:09:42,420 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 10:09:42,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-08 10:09:42,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:09:42,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-08 10:09:42,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2024-11-08 10:09:42,421 INFO L87 Difference]: Start difference. First operand 214 states and 273 transitions. Second operand has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:09:43,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:09:43,112 INFO L93 Difference]: Finished difference Result 286 states and 364 transitions. [2024-11-08 10:09:43,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-08 10:09:43,112 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2024-11-08 10:09:43,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:09:43,114 INFO L225 Difference]: With dead ends: 286 [2024-11-08 10:09:43,114 INFO L226 Difference]: Without dead ends: 252 [2024-11-08 10:09:43,115 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=304, Invalid=1502, Unknown=0, NotChecked=0, Total=1806 [2024-11-08 10:09:43,115 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 81 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 10:09:43,115 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 220 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 10:09:43,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-11-08 10:09:43,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 227. [2024-11-08 10:09:43,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 192 states have (on average 1.2239583333333333) internal successors, (235), 192 states have internal predecessors, (235), 26 states have call successors, (26), 8 states have call predecessors, (26), 8 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-08 10:09:43,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 287 transitions. [2024-11-08 10:09:43,154 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 287 transitions. Word has length 37 [2024-11-08 10:09:43,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:09:43,154 INFO L471 AbstractCegarLoop]: Abstraction has 227 states and 287 transitions. [2024-11-08 10:09:43,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:09:43,154 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 287 transitions. [2024-11-08 10:09:43,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-08 10:09:43,156 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:09:43,156 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:09:43,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 10:09:43,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:43,357 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:09:43,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:09:43,357 INFO L85 PathProgramCache]: Analyzing trace with hash 422300739, now seen corresponding path program 3 times [2024-11-08 10:09:43,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:09:43,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763971426] [2024-11-08 10:09:43,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:43,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:09:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 10:09:43,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271250318] [2024-11-08 10:09:43,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 10:09:43,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:43,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:09:43,412 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:09:43,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 10:09:43,479 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-08 10:09:43,479 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:09:43,480 WARN L253 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-08 10:09:43,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:09:43,532 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 [2024-11-08 10:09:43,548 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 [2024-11-08 10:09:43,631 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 [2024-11-08 10:09:43,639 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 [2024-11-08 10:09:43,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:43,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:43,735 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:43,735 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 28 treesize of output 30 [2024-11-08 10:09:43,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:43,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:43,753 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:43,753 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 28 treesize of output 30 [2024-11-08 10:09:44,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:44,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:44,363 INFO L349 Elim1Store]: treesize reduction 134, result has 36.5 percent of original size [2024-11-08 10:09:44,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 64 treesize of output 104 [2024-11-08 10:09:44,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:44,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:44,451 INFO L349 Elim1Store]: treesize reduction 146, result has 34.5 percent of original size [2024-11-08 10:09:44,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 64 treesize of output 106 [2024-11-08 10:09:45,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:45,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:45,811 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:45,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 228 treesize of output 212 [2024-11-08 10:09:45,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:45,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:45,841 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:45,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 189 treesize of output 157 [2024-11-08 10:09:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:09:47,228 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:09:48,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:09:48,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763971426] [2024-11-08 10:09:48,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 10:09:48,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271250318] [2024-11-08 10:09:48,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271250318] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:09:48,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 10:09:48,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-11-08 10:09:48,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644937722] [2024-11-08 10:09:48,003 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 10:09:48,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-08 10:09:48,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:09:48,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-08 10:09:48,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2024-11-08 10:09:48,004 INFO L87 Difference]: Start difference. First operand 227 states and 287 transitions. Second operand has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:09:48,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:09:48,964 INFO L93 Difference]: Finished difference Result 294 states and 375 transitions. [2024-11-08 10:09:48,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-08 10:09:48,964 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2024-11-08 10:09:48,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:09:48,966 INFO L225 Difference]: With dead ends: 294 [2024-11-08 10:09:48,966 INFO L226 Difference]: Without dead ends: 260 [2024-11-08 10:09:48,967 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=303, Invalid=1677, Unknown=0, NotChecked=0, Total=1980 [2024-11-08 10:09:48,968 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 10:09:48,968 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 234 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 10:09:48,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-11-08 10:09:49,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 220. [2024-11-08 10:09:49,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 185 states have (on average 1.2216216216216216) internal successors, (226), 185 states have internal predecessors, (226), 26 states have call successors, (26), 8 states have call predecessors, (26), 8 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-08 10:09:49,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 278 transitions. [2024-11-08 10:09:49,016 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 278 transitions. Word has length 37 [2024-11-08 10:09:49,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:09:49,017 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 278 transitions. [2024-11-08 10:09:49,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:09:49,017 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 278 transitions. [2024-11-08 10:09:49,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-08 10:09:49,018 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:09:49,018 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:09:49,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 10:09:49,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:49,219 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:09:49,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:09:49,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1977526531, now seen corresponding path program 5 times [2024-11-08 10:09:49,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:09:49,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846685252] [2024-11-08 10:09:49,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:49,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:09:49,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:49,377 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:09:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:49,380 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-08 10:09:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 10:09:49,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:09:49,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846685252] [2024-11-08 10:09:49,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846685252] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:09:49,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035728226] [2024-11-08 10:09:49,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 10:09:49,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:49,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:09:49,385 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:09:49,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 10:09:49,486 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-08 10:09:49,486 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:09:49,488 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 10:09:49,489 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:09:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:09:49,585 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:09:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:09:49,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035728226] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:09:49,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:09:49,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 17 [2024-11-08 10:09:49,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029907400] [2024-11-08 10:09:49,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:09:49,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 10:09:49,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:09:49,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 10:09:49,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2024-11-08 10:09:49,659 INFO L87 Difference]: Start difference. First operand 220 states and 278 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 10:09:50,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:09:50,453 INFO L93 Difference]: Finished difference Result 319 states and 402 transitions. [2024-11-08 10:09:50,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-08 10:09:50,453 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2024-11-08 10:09:50,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:09:50,455 INFO L225 Difference]: With dead ends: 319 [2024-11-08 10:09:50,455 INFO L226 Difference]: Without dead ends: 315 [2024-11-08 10:09:50,455 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=525, Unknown=0, NotChecked=0, Total=702 [2024-11-08 10:09:50,455 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 105 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-08 10:09:50,456 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 250 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-08 10:09:50,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2024-11-08 10:09:50,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 243. [2024-11-08 10:09:50,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 204 states have (on average 1.2352941176470589) internal successors, (252), 204 states have internal predecessors, (252), 29 states have call successors, (29), 9 states have call predecessors, (29), 9 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2024-11-08 10:09:50,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 310 transitions. [2024-11-08 10:09:50,514 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 310 transitions. Word has length 37 [2024-11-08 10:09:50,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:09:50,515 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 310 transitions. [2024-11-08 10:09:50,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 10:09:50,515 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 310 transitions. [2024-11-08 10:09:50,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-08 10:09:50,517 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:09:50,517 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:09:50,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 10:09:50,717 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,SelfDestructingSolverStorable11 [2024-11-08 10:09:50,718 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:09:50,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:09:50,718 INFO L85 PathProgramCache]: Analyzing trace with hash -549300925, now seen corresponding path program 6 times [2024-11-08 10:09:50,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:09:50,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574033299] [2024-11-08 10:09:50,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:50,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:09:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:50,909 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:09:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:50,912 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-08 10:09:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:50,915 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:09:50,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:09:50,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574033299] [2024-11-08 10:09:50,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574033299] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:09:50,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998749581] [2024-11-08 10:09:50,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 10:09:50,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:50,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:09:50,919 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:09:50,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 10:09:51,019 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-08 10:09:51,020 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:09:51,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 10:09:51,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:09:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:09:51,110 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:09:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:09:51,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998749581] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:09:51,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:09:51,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-08 10:09:51,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625539068] [2024-11-08 10:09:51,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:09:51,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 10:09:51,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:09:51,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 10:09:51,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-08 10:09:51,175 INFO L87 Difference]: Start difference. First operand 243 states and 310 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 10:09:51,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:09:51,505 INFO L93 Difference]: Finished difference Result 436 states and 562 transitions. [2024-11-08 10:09:51,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 10:09:51,506 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-11-08 10:09:51,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:09:51,507 INFO L225 Difference]: With dead ends: 436 [2024-11-08 10:09:51,507 INFO L226 Difference]: Without dead ends: 283 [2024-11-08 10:09:51,508 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 69 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2024-11-08 10:09:51,509 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 115 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:09:51,509 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 190 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 10:09:51,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-11-08 10:09:51,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 231. [2024-11-08 10:09:51,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 194 states have (on average 1.2268041237113403) internal successors, (238), 195 states have internal predecessors, (238), 27 states have call successors, (27), 9 states have call predecessors, (27), 9 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2024-11-08 10:09:51,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 292 transitions. [2024-11-08 10:09:51,555 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 292 transitions. Word has length 39 [2024-11-08 10:09:51,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:09:51,555 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 292 transitions. [2024-11-08 10:09:51,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 10:09:51,556 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 292 transitions. [2024-11-08 10:09:51,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-08 10:09:51,556 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:09:51,557 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:09:51,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-08 10:09:51,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-08 10:09:51,757 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:09:51,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:09:51,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1205910401, now seen corresponding path program 7 times [2024-11-08 10:09:51,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:09:51,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998716831] [2024-11-08 10:09:51,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:51,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:09:51,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 10:09:51,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153251290] [2024-11-08 10:09:51,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 10:09:51,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:51,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:09:51,803 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:09:51,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 10:09:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:51,901 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-08 10:09:51,905 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:09:51,934 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 [2024-11-08 10:09:51,942 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 [2024-11-08 10:09:52,011 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 [2024-11-08 10:09:52,022 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 [2024-11-08 10:09:52,104 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:52,104 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 [2024-11-08 10:09:52,117 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:52,118 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 [2024-11-08 10:09:52,209 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:52,209 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 [2024-11-08 10:09:52,224 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:52,224 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 [2024-11-08 10:09:52,865 INFO L349 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2024-11-08 10:09:52,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 70 treesize of output 122 [2024-11-08 10:09:52,962 INFO L349 Elim1Store]: treesize reduction 176, result has 33.6 percent of original size [2024-11-08 10:09:52,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 70 treesize of output 124 [2024-11-08 10:09:54,428 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:54,428 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 213 treesize of output 157 [2024-11-08 10:09:54,434 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:54,434 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 98 treesize of output 62 [2024-11-08 10:09:54,469 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:09:54,469 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:09:55,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:09:55,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998716831] [2024-11-08 10:09:55,168 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 10:09:55,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153251290] [2024-11-08 10:09:55,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153251290] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:09:55,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 10:09:55,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-11-08 10:09:55,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735771177] [2024-11-08 10:09:55,168 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 10:09:55,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-08 10:09:55,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:09:55,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-08 10:09:55,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2024-11-08 10:09:55,169 INFO L87 Difference]: Start difference. First operand 231 states and 292 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 22 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:09:55,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:09:55,814 INFO L93 Difference]: Finished difference Result 265 states and 331 transitions. [2024-11-08 10:09:55,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-08 10:09:55,815 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 22 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2024-11-08 10:09:55,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:09:55,817 INFO L225 Difference]: With dead ends: 265 [2024-11-08 10:09:55,817 INFO L226 Difference]: Without dead ends: 261 [2024-11-08 10:09:55,818 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2024-11-08 10:09:55,818 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 26 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 10:09:55,818 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 294 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 10:09:55,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-11-08 10:09:55,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 247. [2024-11-08 10:09:55,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 208 states have (on average 1.2259615384615385) internal successors, (255), 209 states have internal predecessors, (255), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2024-11-08 10:09:55,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 311 transitions. [2024-11-08 10:09:55,863 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 311 transitions. Word has length 41 [2024-11-08 10:09:55,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:09:55,864 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 311 transitions. [2024-11-08 10:09:55,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 22 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:09:55,864 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 311 transitions. [2024-11-08 10:09:55,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-08 10:09:55,865 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:09:55,865 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:09:55,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-08 10:09:56,069 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,SelfDestructingSolverStorable13 [2024-11-08 10:09:56,070 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:09:56,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:09:56,070 INFO L85 PathProgramCache]: Analyzing trace with hash -382437501, now seen corresponding path program 4 times [2024-11-08 10:09:56,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:09:56,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594031322] [2024-11-08 10:09:56,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:56,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:09:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 10:09:56,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639536114] [2024-11-08 10:09:56,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 10:09:56,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:56,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:09:56,110 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:09:56,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 10:09:56,217 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 10:09:56,218 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:09:56,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-08 10:09:56,224 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:09:56,267 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 [2024-11-08 10:09:56,276 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 [2024-11-08 10:09:56,338 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 [2024-11-08 10:09:56,347 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 [2024-11-08 10:09:56,417 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:56,418 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 [2024-11-08 10:09:56,432 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:56,432 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 [2024-11-08 10:09:56,521 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:56,521 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 [2024-11-08 10:09:56,536 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:56,536 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 [2024-11-08 10:09:57,215 INFO L349 Elim1Store]: treesize reduction 176, result has 33.6 percent of original size [2024-11-08 10:09:57,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 70 treesize of output 124 [2024-11-08 10:09:57,321 INFO L349 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2024-11-08 10:09:57,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 70 treesize of output 122 [2024-11-08 10:09:58,880 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:58,881 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 220 treesize of output 164 [2024-11-08 10:09:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:09:58,976 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:10:02,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:10:02,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594031322] [2024-11-08 10:10:02,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 10:10:02,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639536114] [2024-11-08 10:10:02,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639536114] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:10:02,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 10:10:02,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-11-08 10:10:02,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322984258] [2024-11-08 10:10:02,322 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 10:10:02,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-08 10:10:02,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:10:02,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-08 10:10:02,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1154, Unknown=0, NotChecked=0, Total=1406 [2024-11-08 10:10:02,324 INFO L87 Difference]: Start difference. First operand 247 states and 311 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 24 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:10:02,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:10:02,973 INFO L93 Difference]: Finished difference Result 274 states and 342 transitions. [2024-11-08 10:10:02,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-08 10:10:02,973 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 24 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2024-11-08 10:10:02,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:10:02,975 INFO L225 Difference]: With dead ends: 274 [2024-11-08 10:10:02,975 INFO L226 Difference]: Without dead ends: 256 [2024-11-08 10:10:02,975 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=285, Invalid=1275, Unknown=0, NotChecked=0, Total=1560 [2024-11-08 10:10:02,976 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 26 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 10:10:02,976 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 281 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 10:10:02,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-11-08 10:10:03,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 250. [2024-11-08 10:10:03,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 211 states have (on average 1.2227488151658767) internal successors, (258), 212 states have internal predecessors, (258), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2024-11-08 10:10:03,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 314 transitions. [2024-11-08 10:10:03,023 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 314 transitions. Word has length 41 [2024-11-08 10:10:03,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:10:03,023 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 314 transitions. [2024-11-08 10:10:03,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 24 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:10:03,023 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 314 transitions. [2024-11-08 10:10:03,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-08 10:10:03,024 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:10:03,024 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:10:03,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-08 10:10:03,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-08 10:10:03,229 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:10:03,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:10:03,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1019183412, now seen corresponding path program 1 times [2024-11-08 10:10:03,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:10:03,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718477342] [2024-11-08 10:10:03,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:10:03,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:10:03,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 10:10:03,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978760222] [2024-11-08 10:10:03,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:10:03,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:10:03,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:10:03,277 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:10:03,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 10:10:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:10:03,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-08 10:10:03,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:10:03,405 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 [2024-11-08 10:10:03,415 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 [2024-11-08 10:10:03,461 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 [2024-11-08 10:10:03,467 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 [2024-11-08 10:10:03,856 INFO L349 Elim1Store]: treesize reduction 80, result has 36.0 percent of original size [2024-11-08 10:10:03,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 66 [2024-11-08 10:10:03,906 INFO L349 Elim1Store]: treesize reduction 88, result has 33.8 percent of original size [2024-11-08 10:10:03,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 68 [2024-11-08 10:10:04,920 INFO L349 Elim1Store]: treesize reduction 360, result has 32.7 percent of original size [2024-11-08 10:10:04,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 220 treesize of output 342 [2024-11-08 10:10:05,150 INFO L349 Elim1Store]: treesize reduction 340, result has 34.0 percent of original size [2024-11-08 10:10:05,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 54 case distinctions, treesize of input 170 treesize of output 277 [2024-11-08 10:10:16,536 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:10:16,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 88 [2024-11-08 10:10:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:10:16,576 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:10:17,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:10:17,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718477342] [2024-11-08 10:10:17,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 10:10:17,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978760222] [2024-11-08 10:10:17,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978760222] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:10:17,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 10:10:17,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-11-08 10:10:17,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170431118] [2024-11-08 10:10:17,067 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 10:10:17,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-08 10:10:17,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:10:17,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-08 10:10:17,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2024-11-08 10:10:17,069 INFO L87 Difference]: Start difference. First operand 250 states and 314 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 10:10:17,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:10:17,629 INFO L93 Difference]: Finished difference Result 276 states and 343 transitions. [2024-11-08 10:10:17,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-08 10:10:17,630 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2024-11-08 10:10:17,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:10:17,632 INFO L225 Difference]: With dead ends: 276 [2024-11-08 10:10:17,632 INFO L226 Difference]: Without dead ends: 266 [2024-11-08 10:10:17,632 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2024-11-08 10:10:17,633 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 25 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 10:10:17,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 259 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 10:10:17,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2024-11-08 10:10:17,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 251. [2024-11-08 10:10:17,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 211 states have (on average 1.2180094786729858) internal successors, (257), 212 states have internal predecessors, (257), 28 states have call successors, (28), 11 states have call predecessors, (28), 11 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2024-11-08 10:10:17,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 313 transitions. [2024-11-08 10:10:17,701 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 313 transitions. Word has length 43 [2024-11-08 10:10:17,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:10:17,701 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 313 transitions. [2024-11-08 10:10:17,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 10:10:17,701 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 313 transitions. [2024-11-08 10:10:17,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-08 10:10:17,702 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:10:17,703 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:10:17,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-08 10:10:17,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-08 10:10:17,904 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:10:17,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:10:17,905 INFO L85 PathProgramCache]: Analyzing trace with hash -708040445, now seen corresponding path program 8 times [2024-11-08 10:10:17,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:10:17,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900812053] [2024-11-08 10:10:17,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:10:17,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:10:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:10:18,106 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:10:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:10:18,108 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-08 10:10:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:10:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:10:18,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:10:18,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900812053] [2024-11-08 10:10:18,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900812053] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:10:18,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857431693] [2024-11-08 10:10:18,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:10:18,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:10:18,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:10:18,119 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:10:18,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 10:10:18,209 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:10:18,209 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:10:18,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 10:10:18,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:10:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:10:18,316 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:10:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:10:18,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857431693] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:10:18,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:10:18,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-08 10:10:18,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287675946] [2024-11-08 10:10:18,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:10:18,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 10:10:18,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:10:18,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 10:10:18,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-11-08 10:10:18,400 INFO L87 Difference]: Start difference. First operand 251 states and 313 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 10:10:18,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:10:18,741 INFO L93 Difference]: Finished difference Result 495 states and 633 transitions. [2024-11-08 10:10:18,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 10:10:18,742 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-11-08 10:10:18,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:10:18,743 INFO L225 Difference]: With dead ends: 495 [2024-11-08 10:10:18,743 INFO L226 Difference]: Without dead ends: 350 [2024-11-08 10:10:18,744 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 74 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2024-11-08 10:10:18,744 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 209 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:10:18,745 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 197 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 10:10:18,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2024-11-08 10:10:18,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 306. [2024-11-08 10:10:18,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 256 states have (on average 1.24609375) internal successors, (319), 257 states have internal predecessors, (319), 37 states have call successors, (37), 12 states have call predecessors, (37), 12 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2024-11-08 10:10:18,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 393 transitions. [2024-11-08 10:10:18,820 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 393 transitions. Word has length 43 [2024-11-08 10:10:18,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:10:18,821 INFO L471 AbstractCegarLoop]: Abstraction has 306 states and 393 transitions. [2024-11-08 10:10:18,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 10:10:18,821 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 393 transitions. [2024-11-08 10:10:18,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-08 10:10:18,822 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:10:18,822 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:10:18,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-08 10:10:19,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-08 10:10:19,023 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:10:19,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:10:19,023 INFO L85 PathProgramCache]: Analyzing trace with hash 41847359, now seen corresponding path program 9 times [2024-11-08 10:10:19,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:10:19,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633067136] [2024-11-08 10:10:19,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:10:19,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:10:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:10:19,206 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:10:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:10:19,209 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-08 10:10:19,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:10:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:10:19,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:10:19,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633067136] [2024-11-08 10:10:19,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633067136] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:10:19,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569167856] [2024-11-08 10:10:19,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 10:10:19,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:10:19,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:10:19,215 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:10:19,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 10:10:19,338 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-08 10:10:19,338 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:10:19,339 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 10:10:19,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:10:19,431 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:10:19,432 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:10:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:10:19,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569167856] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:10:19,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:10:19,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-08 10:10:19,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381473680] [2024-11-08 10:10:19,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:10:19,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 10:10:19,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:10:19,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 10:10:19,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-11-08 10:10:19,522 INFO L87 Difference]: Start difference. First operand 306 states and 393 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 10:10:20,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:10:20,308 INFO L93 Difference]: Finished difference Result 343 states and 429 transitions. [2024-11-08 10:10:20,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-08 10:10:20,309 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-11-08 10:10:20,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:10:20,310 INFO L225 Difference]: With dead ends: 343 [2024-11-08 10:10:20,310 INFO L226 Difference]: Without dead ends: 339 [2024-11-08 10:10:20,311 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 73 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2024-11-08 10:10:20,311 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 104 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 10:10:20,311 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 309 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 10:10:20,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2024-11-08 10:10:20,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 308. [2024-11-08 10:10:20,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 258 states have (on average 1.244186046511628) internal successors, (321), 259 states have internal predecessors, (321), 37 states have call successors, (37), 12 states have call predecessors, (37), 12 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2024-11-08 10:10:20,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 395 transitions. [2024-11-08 10:10:20,379 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 395 transitions. Word has length 43 [2024-11-08 10:10:20,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:10:20,379 INFO L471 AbstractCegarLoop]: Abstraction has 308 states and 395 transitions. [2024-11-08 10:10:20,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 10:10:20,379 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 395 transitions. [2024-11-08 10:10:20,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-08 10:10:20,380 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:10:20,380 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:10:20,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-08 10:10:20,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:10:20,581 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:10:20,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:10:20,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1613840449, now seen corresponding path program 10 times [2024-11-08 10:10:20,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:10:20,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037803199] [2024-11-08 10:10:20,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:10:20,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:10:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 10:10:20,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125708498] [2024-11-08 10:10:20,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 10:10:20,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:10:20,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:10:20,629 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:10:20,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-08 10:10:20,771 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 10:10:20,771 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:10:20,773 WARN L253 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-08 10:10:20,776 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:10:20,821 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 [2024-11-08 10:10:20,831 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 [2024-11-08 10:10:20,913 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 [2024-11-08 10:10:20,923 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 [2024-11-08 10:10:21,035 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:10:21,035 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 [2024-11-08 10:10:21,054 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:10:21,055 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 [2024-11-08 10:10:21,188 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:10:21,189 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 [2024-11-08 10:10:21,206 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:10:21,206 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 [2024-11-08 10:10:21,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:10:21,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:10:21,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:10:21,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:10:21,389 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:10:21,389 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 42 treesize of output 50 [2024-11-08 10:10:21,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:10:21,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:10:21,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:10:21,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:10:21,424 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:10:21,425 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 42 treesize of output 50 [2024-11-08 10:10:22,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:10:22,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:10:22,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:10:22,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:10:22,083 INFO L349 Elim1Store]: treesize reduction 76, result has 44.9 percent of original size [2024-11-08 10:10:22,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 88 [2024-11-08 10:10:22,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:10:22,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:10:22,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:10:22,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:10:22,141 INFO L349 Elim1Store]: treesize reduction 66, result has 48.4 percent of original size [2024-11-08 10:10:22,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 86 [2024-11-08 10:10:26,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:10:26,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:10:26,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:10:26,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:10:26,056 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:10:26,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 427 treesize of output 375 [2024-11-08 10:10:26,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:10:26,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:10:26,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:10:26,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:10:26,098 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:10:26,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 336 treesize of output 256 [2024-11-08 10:10:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:10:28,761 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:10:29,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:10:29,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037803199] [2024-11-08 10:10:29,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 10:10:29,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125708498] [2024-11-08 10:10:29,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125708498] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:10:29,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 10:10:29,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2024-11-08 10:10:29,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842345794] [2024-11-08 10:10:29,394 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 10:10:29,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-08 10:10:29,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:10:29,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-08 10:10:29,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1554, Unknown=0, NotChecked=0, Total=1806 [2024-11-08 10:10:29,396 INFO L87 Difference]: Start difference. First operand 308 states and 395 transitions. Second operand has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:10:30,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:10:30,968 INFO L93 Difference]: Finished difference Result 343 states and 437 transitions. [2024-11-08 10:10:30,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-08 10:10:30,969 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2024-11-08 10:10:30,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:10:30,970 INFO L225 Difference]: With dead ends: 343 [2024-11-08 10:10:30,970 INFO L226 Difference]: Without dead ends: 339 [2024-11-08 10:10:30,971 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=344, Invalid=2308, Unknown=0, NotChecked=0, Total=2652 [2024-11-08 10:10:30,972 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 60 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:10:30,972 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 301 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 974 Invalid, 1 Unknown, 0 Unchecked, 1.2s Time] [2024-11-08 10:10:30,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2024-11-08 10:10:31,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 315. [2024-11-08 10:10:31,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 265 states have (on average 1.2452830188679245) internal successors, (330), 265 states have internal predecessors, (330), 37 states have call successors, (37), 12 states have call predecessors, (37), 12 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2024-11-08 10:10:31,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 404 transitions. [2024-11-08 10:10:31,046 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 404 transitions. Word has length 45 [2024-11-08 10:10:31,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:10:31,047 INFO L471 AbstractCegarLoop]: Abstraction has 315 states and 404 transitions. [2024-11-08 10:10:31,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:10:31,047 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 404 transitions. [2024-11-08 10:10:31,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-08 10:10:31,048 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:10:31,048 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:10:31,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-08 10:10:31,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:10:31,248 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:10:31,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:10:31,249 INFO L85 PathProgramCache]: Analyzing trace with hash -75103293, now seen corresponding path program 5 times [2024-11-08 10:10:31,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:10:31,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239375778] [2024-11-08 10:10:31,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:10:31,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:10:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 10:10:31,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768922550] [2024-11-08 10:10:31,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 10:10:31,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:10:31,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:10:31,298 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:10:31,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-08 10:10:31,453 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-08 10:10:31,453 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:10:31,455 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-08 10:10:31,459 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:10:31,478 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 [2024-11-08 10:10:31,486 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 [2024-11-08 10:10:31,534 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 [2024-11-08 10:10:31,551 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 [2024-11-08 10:10:31,621 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:10:31,622 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 [2024-11-08 10:10:31,639 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:10:31,639 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 [2024-11-08 10:10:31,750 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:10:31,750 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 [2024-11-08 10:10:31,760 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:10:31,761 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 [2024-11-08 10:10:31,871 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:10:31,871 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 [2024-11-08 10:10:31,885 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:10:31,886 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 [2024-11-08 10:10:32,562 INFO L349 Elim1Store]: treesize reduction 220, result has 33.5 percent of original size [2024-11-08 10:10:32,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 84 treesize of output 152 [2024-11-08 10:10:32,677 INFO L349 Elim1Store]: treesize reduction 200, result has 35.7 percent of original size [2024-11-08 10:10:32,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 84 treesize of output 150