./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array24_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array24_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b41c571dabcbc4670dde65107f8da5b879f13435b678b4e9a9cdcc7ef0066cf6 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-13 22:24:20,928 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 22:24:21,011 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 22:24:21,017 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 22:24:21,018 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 22:24:21,058 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 22:24:21,058 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 22:24:21,059 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 22:24:21,059 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 22:24:21,060 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 22:24:21,061 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 22:24:21,061 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 22:24:21,062 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 22:24:21,064 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 22:24:21,064 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 22:24:21,064 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 22:24:21,065 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 22:24:21,065 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 22:24:21,065 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 22:24:21,065 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 22:24:21,066 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 22:24:21,069 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 22:24:21,070 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 22:24:21,070 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 22:24:21,070 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 22:24:21,070 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 22:24:21,070 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 22:24:21,071 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 22:24:21,071 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 22:24:21,071 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 22:24:21,071 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 22:24:21,071 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 22:24:21,072 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 22:24:21,072 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 22:24:21,072 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 22:24:21,072 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 22:24:21,072 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 22:24:21,073 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 22:24:21,073 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 22:24:21,075 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 22:24:21,075 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 22:24:21,075 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 22:24:21,075 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b41c571dabcbc4670dde65107f8da5b879f13435b678b4e9a9cdcc7ef0066cf6 [2024-10-13 22:24:21,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 22:24:21,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 22:24:21,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 22:24:21,344 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 22:24:21,344 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 22:24:21,345 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array24_pattern.c [2024-10-13 22:24:22,720 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 22:24:22,903 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 22:24:22,903 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array24_pattern.c [2024-10-13 22:24:22,911 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d85edc02e/f1a7b2541775423fa2f7b13464626640/FLAGd25e1c40c [2024-10-13 22:24:23,296 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d85edc02e/f1a7b2541775423fa2f7b13464626640 [2024-10-13 22:24:23,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 22:24:23,301 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 22:24:23,302 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 22:24:23,302 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 22:24:23,309 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 22:24:23,309 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:24:23" (1/1) ... [2024-10-13 22:24:23,310 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1949e03d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:24:23, skipping insertion in model container [2024-10-13 22:24:23,310 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:24:23" (1/1) ... [2024-10-13 22:24:23,335 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 22:24:23,501 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array24_pattern.c[1359,1372] [2024-10-13 22:24:23,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 22:24:23,549 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 22:24:23,568 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array24_pattern.c[1359,1372] [2024-10-13 22:24:23,582 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 22:24:23,597 INFO L204 MainTranslator]: Completed translation [2024-10-13 22:24:23,598 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:24:23 WrapperNode [2024-10-13 22:24:23,598 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 22:24:23,599 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 22:24:23,599 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 22:24:23,599 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 22:24:23,609 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:24:23" (1/1) ... [2024-10-13 22:24:23,615 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:24:23" (1/1) ... [2024-10-13 22:24:23,636 INFO L138 Inliner]: procedures = 17, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 107 [2024-10-13 22:24:23,639 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 22:24:23,639 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 22:24:23,639 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 22:24:23,640 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 22:24:23,650 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:24:23" (1/1) ... [2024-10-13 22:24:23,650 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:24:23" (1/1) ... [2024-10-13 22:24:23,653 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:24:23" (1/1) ... [2024-10-13 22:24:23,664 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-13 22:24:23,665 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:24:23" (1/1) ... [2024-10-13 22:24:23,665 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:24:23" (1/1) ... [2024-10-13 22:24:23,670 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:24:23" (1/1) ... [2024-10-13 22:24:23,674 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:24:23" (1/1) ... [2024-10-13 22:24:23,675 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:24:23" (1/1) ... [2024-10-13 22:24:23,676 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:24:23" (1/1) ... [2024-10-13 22:24:23,678 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 22:24:23,679 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 22:24:23,679 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 22:24:23,679 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 22:24:23,680 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:24:23" (1/1) ... [2024-10-13 22:24:23,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 22:24:23,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:24:23,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 22:24:23,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 22:24:23,752 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2024-10-13 22:24:23,752 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2024-10-13 22:24:23,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 22:24:23,753 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-13 22:24:23,753 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-13 22:24:23,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 22:24:23,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 22:24:23,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 22:24:23,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 22:24:23,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 22:24:23,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 22:24:23,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 22:24:23,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 22:24:23,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 22:24:23,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 22:24:23,824 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 22:24:23,826 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 22:24:24,004 INFO L? ?]: Removed 25 outVars from TransFormulas that were not future-live. [2024-10-13 22:24:24,005 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 22:24:24,036 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 22:24:24,036 INFO L314 CfgBuilder]: Removed 5 assume(true) statements. [2024-10-13 22:24:24,037 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:24:24 BoogieIcfgContainer [2024-10-13 22:24:24,037 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 22:24:24,039 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 22:24:24,039 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 22:24:24,043 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 22:24:24,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:24:23" (1/3) ... [2024-10-13 22:24:24,044 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc09cd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:24:24, skipping insertion in model container [2024-10-13 22:24:24,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:24:23" (2/3) ... [2024-10-13 22:24:24,044 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc09cd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:24:24, skipping insertion in model container [2024-10-13 22:24:24,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:24:24" (3/3) ... [2024-10-13 22:24:24,046 INFO L112 eAbstractionObserver]: Analyzing ICFG array24_pattern.c [2024-10-13 22:24:24,059 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 22:24:24,059 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 22:24:24,111 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 22:24:24,119 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;@108c6b47, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 22:24:24,119 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-13 22:24:24,122 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-13 22:24:24,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-13 22:24:24,129 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:24:24,130 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:24:24,131 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:24:24,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:24:24,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1644752152, now seen corresponding path program 1 times [2024-10-13 22:24:24,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:24:24,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232237946] [2024-10-13 22:24:24,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:24:24,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:24:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:24,316 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:24:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:24:24,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:24:24,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232237946] [2024-10-13 22:24:24,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232237946] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:24:24,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:24:24,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 22:24:24,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875926057] [2024-10-13 22:24:24,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:24:24,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 22:24:24,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:24:24,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 22:24:24,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 22:24:24,366 INFO L87 Difference]: Start difference. First operand has 35 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-13 22:24:24,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:24:24,402 INFO L93 Difference]: Finished difference Result 68 states and 106 transitions. [2024-10-13 22:24:24,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 22:24:24,405 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-10-13 22:24:24,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:24:24,412 INFO L225 Difference]: With dead ends: 68 [2024-10-13 22:24:24,412 INFO L226 Difference]: Without dead ends: 33 [2024-10-13 22:24:24,416 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 22:24:24,419 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:24:24,422 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:24:24,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-10-13 22:24:24,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-10-13 22:24:24,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-13 22:24:24,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2024-10-13 22:24:24,465 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 14 [2024-10-13 22:24:24,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:24:24,467 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2024-10-13 22:24:24,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-13 22:24:24,467 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2024-10-13 22:24:24,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-13 22:24:24,470 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:24:24,470 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:24:24,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 22:24:24,471 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:24:24,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:24:24,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1106245937, now seen corresponding path program 1 times [2024-10-13 22:24:24,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:24:24,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051724829] [2024-10-13 22:24:24,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:24:24,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:24:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:24,857 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:24:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:24,924 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-13 22:24:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:24,930 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-13 22:24:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:24,935 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-13 22:24:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 22:24:24,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:24:24,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051724829] [2024-10-13 22:24:24,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051724829] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:24:24,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255306963] [2024-10-13 22:24:24,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:24:24,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:24:24,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:24:24,944 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:24:24,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 22:24:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:25,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-13 22:24:25,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:24:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 22:24:25,186 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 22:24:25,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255306963] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:24:25,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:24:25,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-10-13 22:24:25,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372607322] [2024-10-13 22:24:25,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:24:25,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 22:24:25,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:24:25,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 22:24:25,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-13 22:24:25,191 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-13 22:24:25,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:24:25,304 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2024-10-13 22:24:25,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 22:24:25,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2024-10-13 22:24:25,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:24:25,307 INFO L225 Difference]: With dead ends: 76 [2024-10-13 22:24:25,307 INFO L226 Difference]: Without dead ends: 43 [2024-10-13 22:24:25,308 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-13 22:24:25,309 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:24:25,310 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 115 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:24:25,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-13 22:24:25,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2024-10-13 22:24:25,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-13 22:24:25,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2024-10-13 22:24:25,320 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 34 [2024-10-13 22:24:25,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:24:25,323 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2024-10-13 22:24:25,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-13 22:24:25,324 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2024-10-13 22:24:25,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-13 22:24:25,326 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:24:25,326 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:24:25,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 22:24:25,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:24:25,532 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:24:25,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:24:25,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1743944017, now seen corresponding path program 1 times [2024-10-13 22:24:25,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:24:25,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526269731] [2024-10-13 22:24:25,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:24:25,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:24:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:25,651 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:24:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:25,657 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-13 22:24:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:25,665 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-13 22:24:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:25,668 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-13 22:24:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-13 22:24:25,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:24:25,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526269731] [2024-10-13 22:24:25,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526269731] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:24:25,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:24:25,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 22:24:25,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3163876] [2024-10-13 22:24:25,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:24:25,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 22:24:25,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:24:25,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 22:24:25,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 22:24:25,680 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:24:25,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:24:25,724 INFO L93 Difference]: Finished difference Result 71 states and 95 transitions. [2024-10-13 22:24:25,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 22:24:25,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2024-10-13 22:24:25,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:24:25,725 INFO L225 Difference]: With dead ends: 71 [2024-10-13 22:24:25,726 INFO L226 Difference]: Without dead ends: 41 [2024-10-13 22:24:25,727 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 22:24:25,728 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:24:25,730 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 67 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:24:25,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-13 22:24:25,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2024-10-13 22:24:25,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-13 22:24:25,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2024-10-13 22:24:25,737 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 37 [2024-10-13 22:24:25,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:24:25,737 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2024-10-13 22:24:25,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 22:24:25,738 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2024-10-13 22:24:25,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-13 22:24:25,739 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:24:25,739 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:24:25,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 22:24:25,739 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:24:25,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:24:25,740 INFO L85 PathProgramCache]: Analyzing trace with hash -190626440, now seen corresponding path program 1 times [2024-10-13 22:24:25,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:24:25,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581049636] [2024-10-13 22:24:25,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:24:25,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:24:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:25,843 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:24:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:25,847 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-13 22:24:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:25,855 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-13 22:24:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:25,864 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-13 22:24:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-13 22:24:25,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:24:25,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581049636] [2024-10-13 22:24:25,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581049636] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:24:25,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629295094] [2024-10-13 22:24:25,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:24:25,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:24:25,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:24:25,880 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:24:25,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 22:24:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:25,953 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 22:24:25,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:24:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 22:24:26,035 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:24:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-13 22:24:26,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629295094] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:24:26,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:24:26,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-10-13 22:24:26,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257105411] [2024-10-13 22:24:26,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:24:26,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 22:24:26,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:24:26,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 22:24:26,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-10-13 22:24:26,131 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-13 22:24:26,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:24:26,255 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2024-10-13 22:24:26,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 22:24:26,255 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 38 [2024-10-13 22:24:26,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:24:26,257 INFO L225 Difference]: With dead ends: 49 [2024-10-13 22:24:26,257 INFO L226 Difference]: Without dead ends: 45 [2024-10-13 22:24:26,257 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-13 22:24:26,258 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 29 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:24:26,258 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 109 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:24:26,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-13 22:24:26,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2024-10-13 22:24:26,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-13 22:24:26,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2024-10-13 22:24:26,272 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 38 [2024-10-13 22:24:26,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:24:26,272 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2024-10-13 22:24:26,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-13 22:24:26,273 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2024-10-13 22:24:26,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-13 22:24:26,273 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:24:26,273 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:24:26,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 22:24:26,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-13 22:24:26,475 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:24:26,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:24:26,475 INFO L85 PathProgramCache]: Analyzing trace with hash -465343306, now seen corresponding path program 1 times [2024-10-13 22:24:26,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:24:26,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502703182] [2024-10-13 22:24:26,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:24:26,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:24:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:26,590 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:24:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:26,610 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-13 22:24:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:26,614 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-13 22:24:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:26,617 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-13 22:24:26,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-13 22:24:26,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:24:26,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502703182] [2024-10-13 22:24:26,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502703182] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:24:26,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239390459] [2024-10-13 22:24:26,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:24:26,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:24:26,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:24:26,623 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:24:26,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 22:24:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:26,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-13 22:24:26,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:24:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 22:24:26,780 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:24:26,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-13 22:24:26,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239390459] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:24:26,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:24:26,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2024-10-13 22:24:26,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603088112] [2024-10-13 22:24:26,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:24:26,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-13 22:24:26,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:24:26,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-13 22:24:26,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-10-13 22:24:26,908 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-13 22:24:27,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:24:27,141 INFO L93 Difference]: Finished difference Result 77 states and 99 transitions. [2024-10-13 22:24:27,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 22:24:27,142 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 42 [2024-10-13 22:24:27,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:24:27,143 INFO L225 Difference]: With dead ends: 77 [2024-10-13 22:24:27,143 INFO L226 Difference]: Without dead ends: 45 [2024-10-13 22:24:27,143 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2024-10-13 22:24:27,144 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 58 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:24:27,144 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 158 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 22:24:27,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-13 22:24:27,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2024-10-13 22:24:27,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-13 22:24:27,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2024-10-13 22:24:27,157 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 42 [2024-10-13 22:24:27,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:24:27,158 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2024-10-13 22:24:27,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-13 22:24:27,158 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2024-10-13 22:24:27,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-13 22:24:27,159 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:24:27,159 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:24:27,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-13 22:24:27,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:24:27,360 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:24:27,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:24:27,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1367452082, now seen corresponding path program 2 times [2024-10-13 22:24:27,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:24:27,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518583304] [2024-10-13 22:24:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:24:27,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:24:27,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:27,475 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:24:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:27,479 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-13 22:24:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:27,483 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-13 22:24:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:27,487 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-13 22:24:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:27,492 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-13 22:24:27,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:24:27,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518583304] [2024-10-13 22:24:27,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518583304] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:24:27,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367702319] [2024-10-13 22:24:27,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:24:27,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:24:27,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:24:27,498 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:24:27,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 22:24:27,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:24:27,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:24:27,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 22:24:27,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:24:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-13 22:24:27,645 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:24:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-13 22:24:27,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367702319] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:24:27,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:24:27,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-13 22:24:27,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039299751] [2024-10-13 22:24:27,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:24:27,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-13 22:24:27,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:24:27,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-13 22:24:27,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-10-13 22:24:27,718 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-13 22:24:27,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:24:27,853 INFO L93 Difference]: Finished difference Result 91 states and 113 transitions. [2024-10-13 22:24:27,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 22:24:27,854 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2024-10-13 22:24:27,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:24:27,855 INFO L225 Difference]: With dead ends: 91 [2024-10-13 22:24:27,855 INFO L226 Difference]: Without dead ends: 61 [2024-10-13 22:24:27,856 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2024-10-13 22:24:27,856 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:24:27,857 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 160 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:24:27,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-13 22:24:27,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2024-10-13 22:24:27,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-13 22:24:27,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-10-13 22:24:27,873 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 44 [2024-10-13 22:24:27,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:24:27,873 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-10-13 22:24:27,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-13 22:24:27,874 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-10-13 22:24:27,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-13 22:24:27,875 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:24:27,875 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:24:27,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-13 22:24:28,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:24:28,075 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:24:28,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:24:28,076 INFO L85 PathProgramCache]: Analyzing trace with hash 160309039, now seen corresponding path program 3 times [2024-10-13 22:24:28,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:24:28,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304031312] [2024-10-13 22:24:28,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:24:28,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:24:28,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 22:24:28,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781448271] [2024-10-13 22:24:28,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:24:28,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:24:28,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:24:28,110 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:24:28,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 22:24:28,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-10-13 22:24:28,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:24:28,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-10-13 22:24:28,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:24:28,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 22:24:28,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-13 22:24:28,618 INFO L349 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2024-10-13 22:24:28,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2024-10-13 22:24:28,698 INFO L349 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2024-10-13 22:24:28,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2024-10-13 22:24:29,474 INFO L349 Elim1Store]: treesize reduction 190, result has 15.6 percent of original size [2024-10-13 22:24:29,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 66 treesize of output 62 [2024-10-13 22:24:29,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:24:29,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:24:29,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:24:29,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:24:29,954 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:24:29,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 13 [2024-10-13 22:24:30,067 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 22:24:30,068 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:24:31,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 170 [2024-10-13 22:24:31,610 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:24:31,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79913 treesize of output 72745 [2024-10-13 22:24:32,219 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-13 22:24:32,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:24:32,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304031312] [2024-10-13 22:24:32,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 22:24:32,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781448271] [2024-10-13 22:24:32,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781448271] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:24:32,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 22:24:32,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 48 [2024-10-13 22:24:32,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153046887] [2024-10-13 22:24:32,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 22:24:32,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-13 22:24:32,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:24:32,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-13 22:24:32,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1906, Unknown=0, NotChecked=0, Total=2256 [2024-10-13 22:24:32,224 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 48 states, 48 states have (on average 1.625) internal successors, (78), 46 states have internal predecessors, (78), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-13 22:24:39,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:24:39,692 INFO L93 Difference]: Finished difference Result 280 states and 379 transitions. [2024-10-13 22:24:39,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-10-13 22:24:39,692 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 46 states have internal predecessors, (78), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 54 [2024-10-13 22:24:39,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:24:39,696 INFO L225 Difference]: With dead ends: 280 [2024-10-13 22:24:39,696 INFO L226 Difference]: Without dead ends: 238 [2024-10-13 22:24:39,711 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4339 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1972, Invalid=11600, Unknown=0, NotChecked=0, Total=13572 [2024-10-13 22:24:39,712 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 468 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 1974 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 2308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 1974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-10-13 22:24:39,712 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 646 Invalid, 2308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 1974 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-10-13 22:24:39,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-10-13 22:24:39,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 146. [2024-10-13 22:24:39,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 122 states have (on average 1.2868852459016393) internal successors, (157), 121 states have internal predecessors, (157), 17 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (21), 19 states have call predecessors, (21), 17 states have call successors, (21) [2024-10-13 22:24:39,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 195 transitions. [2024-10-13 22:24:39,763 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 195 transitions. Word has length 54 [2024-10-13 22:24:39,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:24:39,764 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 195 transitions. [2024-10-13 22:24:39,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 46 states have internal predecessors, (78), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-13 22:24:39,764 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 195 transitions. [2024-10-13 22:24:39,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-13 22:24:39,766 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:24:39,766 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:24:39,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-13 22:24:39,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:24:39,967 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:24:39,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:24:39,968 INFO L85 PathProgramCache]: Analyzing trace with hash 110261106, now seen corresponding path program 4 times [2024-10-13 22:24:39,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:24:39,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411778152] [2024-10-13 22:24:39,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:24:39,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:24:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:40,099 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:24:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:40,102 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-13 22:24:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:40,105 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-13 22:24:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:40,108 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-13 22:24:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-13 22:24:40,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:24:40,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411778152] [2024-10-13 22:24:40,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411778152] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:24:40,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260523334] [2024-10-13 22:24:40,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 22:24:40,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:24:40,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:24:40,114 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:24:40,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 22:24:40,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 22:24:40,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:24:40,186 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 22:24:40,189 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:24:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-13 22:24:40,279 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:24:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-13 22:24:40,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260523334] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:24:40,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:24:40,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-13 22:24:40,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390678857] [2024-10-13 22:24:40,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:24:40,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 22:24:40,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:24:40,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 22:24:40,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-13 22:24:40,362 INFO L87 Difference]: Start difference. First operand 146 states and 195 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-13 22:24:40,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:24:40,511 INFO L93 Difference]: Finished difference Result 397 states and 536 transitions. [2024-10-13 22:24:40,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 22:24:40,512 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 55 [2024-10-13 22:24:40,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:24:40,514 INFO L225 Difference]: With dead ends: 397 [2024-10-13 22:24:40,514 INFO L226 Difference]: Without dead ends: 256 [2024-10-13 22:24:40,514 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 108 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-10-13 22:24:40,515 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 11 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:24:40,516 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 214 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:24:40,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-10-13 22:24:40,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 232. [2024-10-13 22:24:40,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 191 states have (on average 1.2617801047120418) internal successors, (241), 189 states have internal predecessors, (241), 29 states have call successors, (29), 9 states have call predecessors, (29), 11 states have return successors, (37), 33 states have call predecessors, (37), 29 states have call successors, (37) [2024-10-13 22:24:40,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 307 transitions. [2024-10-13 22:24:40,566 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 307 transitions. Word has length 55 [2024-10-13 22:24:40,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:24:40,567 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 307 transitions. [2024-10-13 22:24:40,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-13 22:24:40,567 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 307 transitions. [2024-10-13 22:24:40,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-13 22:24:40,569 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:24:40,569 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:24:40,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-13 22:24:40,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:24:40,774 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:24:40,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:24:40,774 INFO L85 PathProgramCache]: Analyzing trace with hash 669382493, now seen corresponding path program 5 times [2024-10-13 22:24:40,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:24:40,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975171427] [2024-10-13 22:24:40,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:24:40,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:24:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:40,933 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:24:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:40,935 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-13 22:24:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:40,937 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-13 22:24:40,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:40,939 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-13 22:24:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-10-13 22:24:40,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:24:40,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975171427] [2024-10-13 22:24:40,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975171427] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:24:40,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118970623] [2024-10-13 22:24:40,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 22:24:40,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:24:40,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:24:40,944 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:24:40,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 22:24:41,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-13 22:24:41,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:24:41,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 22:24:41,028 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:24:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-10-13 22:24:41,106 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:24:41,173 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-10-13 22:24:41,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118970623] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:24:41,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:24:41,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-10-13 22:24:41,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456409923] [2024-10-13 22:24:41,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:24:41,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 22:24:41,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:24:41,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 22:24:41,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2024-10-13 22:24:41,176 INFO L87 Difference]: Start difference. First operand 232 states and 307 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-13 22:24:41,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:24:41,363 INFO L93 Difference]: Finished difference Result 360 states and 459 transitions. [2024-10-13 22:24:41,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 22:24:41,365 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2024-10-13 22:24:41,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:24:41,366 INFO L225 Difference]: With dead ends: 360 [2024-10-13 22:24:41,367 INFO L226 Difference]: Without dead ends: 222 [2024-10-13 22:24:41,367 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2024-10-13 22:24:41,368 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:24:41,368 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 168 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:24:41,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-10-13 22:24:41,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 187. [2024-10-13 22:24:41,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 154 states have (on average 1.2337662337662338) internal successors, (190), 153 states have internal predecessors, (190), 21 states have call successors, (21), 9 states have call predecessors, (21), 11 states have return successors, (27), 24 states have call predecessors, (27), 21 states have call successors, (27) [2024-10-13 22:24:41,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 238 transitions. [2024-10-13 22:24:41,413 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 238 transitions. Word has length 58 [2024-10-13 22:24:41,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:24:41,413 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 238 transitions. [2024-10-13 22:24:41,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-13 22:24:41,414 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 238 transitions. [2024-10-13 22:24:41,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-13 22:24:41,415 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:24:41,415 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:24:41,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-13 22:24:41,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:24:41,616 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:24:41,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:24:41,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2032202519, now seen corresponding path program 1 times [2024-10-13 22:24:41,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:24:41,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726623850] [2024-10-13 22:24:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:24:41,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:24:41,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:41,689 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:24:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:41,693 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-13 22:24:41,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:41,695 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-13 22:24:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:41,697 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-13 22:24:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:41,699 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-13 22:24:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-10-13 22:24:41,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:24:41,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726623850] [2024-10-13 22:24:41,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726623850] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:24:41,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:24:41,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 22:24:41,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856977730] [2024-10-13 22:24:41,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:24:41,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 22:24:41,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:24:41,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 22:24:41,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:24:41,715 INFO L87 Difference]: Start difference. First operand 187 states and 238 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-10-13 22:24:41,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:24:41,790 INFO L93 Difference]: Finished difference Result 275 states and 352 transitions. [2024-10-13 22:24:41,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 22:24:41,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 60 [2024-10-13 22:24:41,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:24:41,793 INFO L225 Difference]: With dead ends: 275 [2024-10-13 22:24:41,793 INFO L226 Difference]: Without dead ends: 201 [2024-10-13 22:24:41,794 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:24:41,794 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:24:41,795 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 144 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:24:41,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-10-13 22:24:41,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2024-10-13 22:24:41,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 163 states have (on average 1.2208588957055215) internal successors, (199), 159 states have internal predecessors, (199), 21 states have call successors, (21), 9 states have call predecessors, (21), 13 states have return successors, (31), 29 states have call predecessors, (31), 21 states have call successors, (31) [2024-10-13 22:24:41,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 251 transitions. [2024-10-13 22:24:41,844 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 251 transitions. Word has length 60 [2024-10-13 22:24:41,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:24:41,844 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 251 transitions. [2024-10-13 22:24:41,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-10-13 22:24:41,844 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 251 transitions. [2024-10-13 22:24:41,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-13 22:24:41,847 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:24:41,847 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:24:41,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-13 22:24:41,847 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:24:41,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:24:41,848 INFO L85 PathProgramCache]: Analyzing trace with hash 224708488, now seen corresponding path program 1 times [2024-10-13 22:24:41,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:24:41,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150387810] [2024-10-13 22:24:41,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:24:41,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:24:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:42,048 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:24:42,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:42,050 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-13 22:24:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:42,075 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-13 22:24:42,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:42,079 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-13 22:24:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:42,130 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-13 22:24:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-13 22:24:42,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:24:42,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150387810] [2024-10-13 22:24:42,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150387810] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:24:42,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891265413] [2024-10-13 22:24:42,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:24:42,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:24:42,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:24:42,142 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:24:42,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 22:24:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:42,215 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-13 22:24:42,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:24:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-13 22:24:42,395 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:24:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-13 22:24:42,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891265413] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:24:42,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:24:42,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 22 [2024-10-13 22:24:42,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374761948] [2024-10-13 22:24:42,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:24:42,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-13 22:24:42,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:24:42,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-13 22:24:42,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2024-10-13 22:24:42,582 INFO L87 Difference]: Start difference. First operand 198 states and 251 transitions. Second operand has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 6 states have call successors, (12), 3 states have call predecessors, (12), 8 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2024-10-13 22:24:42,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:24:42,866 INFO L93 Difference]: Finished difference Result 272 states and 332 transitions. [2024-10-13 22:24:42,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-13 22:24:42,866 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 6 states have call successors, (12), 3 states have call predecessors, (12), 8 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 60 [2024-10-13 22:24:42,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:24:42,868 INFO L225 Difference]: With dead ends: 272 [2024-10-13 22:24:42,868 INFO L226 Difference]: Without dead ends: 176 [2024-10-13 22:24:42,869 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 113 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2024-10-13 22:24:42,869 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 39 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:24:42,869 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 242 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 22:24:42,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-10-13 22:24:42,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 157. [2024-10-13 22:24:42,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 133 states have (on average 1.2030075187969924) internal successors, (160), 133 states have internal predecessors, (160), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (17), 15 states have call predecessors, (17), 13 states have call successors, (17) [2024-10-13 22:24:42,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 190 transitions. [2024-10-13 22:24:42,905 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 190 transitions. Word has length 60 [2024-10-13 22:24:42,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:24:42,906 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 190 transitions. [2024-10-13 22:24:42,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 6 states have call successors, (12), 3 states have call predecessors, (12), 8 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2024-10-13 22:24:42,906 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 190 transitions. [2024-10-13 22:24:42,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-10-13 22:24:42,907 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:24:42,907 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:24:42,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-13 22:24:43,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-13 22:24:43,108 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:24:43,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:24:43,108 INFO L85 PathProgramCache]: Analyzing trace with hash -125029806, now seen corresponding path program 6 times [2024-10-13 22:24:43,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:24:43,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072150491] [2024-10-13 22:24:43,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:24:43,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:24:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:43,280 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:24:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:43,282 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-13 22:24:43,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:43,284 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-13 22:24:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:43,287 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-13 22:24:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-10-13 22:24:43,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:24:43,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072150491] [2024-10-13 22:24:43,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072150491] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:24:43,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447142034] [2024-10-13 22:24:43,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 22:24:43,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:24:43,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:24:43,291 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:24:43,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 22:24:43,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-10-13 22:24:43,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:24:43,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 22:24:43,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:24:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 44 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-13 22:24:43,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:24:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-10-13 22:24:43,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447142034] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:24:43,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:24:43,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-10-13 22:24:43,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643557088] [2024-10-13 22:24:43,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:24:43,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 22:24:43,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:24:43,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 22:24:43,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2024-10-13 22:24:43,545 INFO L87 Difference]: Start difference. First operand 157 states and 190 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-13 22:24:43,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:24:43,731 INFO L93 Difference]: Finished difference Result 197 states and 232 transitions. [2024-10-13 22:24:43,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-13 22:24:43,732 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 64 [2024-10-13 22:24:43,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:24:43,733 INFO L225 Difference]: With dead ends: 197 [2024-10-13 22:24:43,733 INFO L226 Difference]: Without dead ends: 110 [2024-10-13 22:24:43,733 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2024-10-13 22:24:43,734 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 32 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:24:43,734 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 256 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:24:43,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-10-13 22:24:43,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2024-10-13 22:24:43,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 92 states have internal predecessors, (111), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (13), 12 states have call predecessors, (13), 9 states have call successors, (13) [2024-10-13 22:24:43,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 133 transitions. [2024-10-13 22:24:43,759 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 133 transitions. Word has length 64 [2024-10-13 22:24:43,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:24:43,759 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 133 transitions. [2024-10-13 22:24:43,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-13 22:24:43,760 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 133 transitions. [2024-10-13 22:24:43,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-13 22:24:43,760 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:24:43,760 INFO L215 NwaCegarLoop]: trace histogram [9, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:24:43,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-13 22:24:43,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:24:43,961 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:24:43,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:24:43,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2146777757, now seen corresponding path program 2 times [2024-10-13 22:24:43,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:24:43,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430492490] [2024-10-13 22:24:43,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:24:43,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:24:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:44,109 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 22:24:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:44,112 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-13 22:24:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:44,116 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-13 22:24:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:44,120 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-13 22:24:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:44,124 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-10-13 22:24:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:44,127 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-10-13 22:24:44,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:24:44,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430492490] [2024-10-13 22:24:44,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430492490] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:24:44,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78817830] [2024-10-13 22:24:44,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:24:44,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:24:44,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:24:44,129 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:24:44,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 22:24:44,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:24:44,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:24:44,214 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 22:24:44,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:24:44,318 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-13 22:24:44,318 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:24:44,418 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-10-13 22:24:44,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78817830] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:24:44,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:24:44,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-13 22:24:44,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223571143] [2024-10-13 22:24:44,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:24:44,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 22:24:44,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:24:44,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 22:24:44,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-13 22:24:44,420 INFO L87 Difference]: Start difference. First operand 110 states and 133 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-10-13 22:24:44,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:24:44,538 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2024-10-13 22:24:44,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 22:24:44,539 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 68 [2024-10-13 22:24:44,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:24:44,540 INFO L225 Difference]: With dead ends: 114 [2024-10-13 22:24:44,541 INFO L226 Difference]: Without dead ends: 103 [2024-10-13 22:24:44,541 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 135 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2024-10-13 22:24:44,542 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:24:44,543 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 85 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:24:44,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-13 22:24:44,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2024-10-13 22:24:44,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (13), 12 states have call predecessors, (13), 9 states have call successors, (13) [2024-10-13 22:24:44,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 119 transitions. [2024-10-13 22:24:44,568 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 119 transitions. Word has length 68 [2024-10-13 22:24:44,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:24:44,569 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 119 transitions. [2024-10-13 22:24:44,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-10-13 22:24:44,569 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 119 transitions. [2024-10-13 22:24:44,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-13 22:24:44,570 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:24:44,570 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:24:44,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-13 22:24:44,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-13 22:24:44,771 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:24:44,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:24:44,771 INFO L85 PathProgramCache]: Analyzing trace with hash 986345860, now seen corresponding path program 7 times [2024-10-13 22:24:44,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:24:44,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399243204] [2024-10-13 22:24:44,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:24:44,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:24:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 22:24:44,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055507734] [2024-10-13 22:24:44,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 22:24:44,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:24:44,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:24:44,818 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:24:44,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-13 22:24:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:24:46,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-10-13 22:24:46,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:24:46,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 22:24:46,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-13 22:24:46,482 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:24:46,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-10-13 22:24:46,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:24:46,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2024-10-13 22:24:46,652 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:24:46,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2024-10-13 22:24:46,716 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:24:46,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2024-10-13 22:24:46,889 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:24:46,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2024-10-13 22:24:46,979 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:24:46,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2024-10-13 22:24:47,081 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:24:47,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 88 [2024-10-13 22:24:48,450 INFO L349 Elim1Store]: treesize reduction 324, result has 16.5 percent of original size [2024-10-13 22:24:48,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 54 case distinctions, treesize of input 91 treesize of output 104 [2024-10-13 22:24:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 8 proven. 150 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 22:24:49,678 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:24:58,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1217 treesize of output 1199 [2024-10-13 22:25:02,262 INFO L349 Elim1Store]: treesize reduction 50, result has 78.4 percent of original size [2024-10-13 22:25:02,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input -4317422871412919181 treesize of output -4317422871412919001