./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-fpi/condn.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-fpi/condn.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 d395fadb914a95d9511046d910130b84077290c26c4e0d02bd3863b898526b50 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-13 22:30:12,011 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 22:30:12,087 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 22:30:12,095 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 22:30:12,096 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 22:30:12,126 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 22:30:12,127 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 22:30:12,127 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 22:30:12,128 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 22:30:12,128 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 22:30:12,129 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 22:30:12,129 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 22:30:12,130 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 22:30:12,130 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 22:30:12,131 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 22:30:12,131 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 22:30:12,131 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 22:30:12,132 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 22:30:12,132 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 22:30:12,135 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 22:30:12,135 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 22:30:12,136 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 22:30:12,139 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 22:30:12,140 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 22:30:12,140 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 22:30:12,140 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 22:30:12,140 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 22:30:12,141 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 22:30:12,141 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 22:30:12,141 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 22:30:12,141 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 22:30:12,142 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 22:30:12,142 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 22:30:12,142 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 22:30:12,142 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 22:30:12,143 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 22:30:12,143 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 22:30:12,143 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 22:30:12,143 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 22:30:12,144 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 22:30:12,144 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 22:30:12,145 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 22:30:12,158 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d395fadb914a95d9511046d910130b84077290c26c4e0d02bd3863b898526b50 [2024-10-13 22:30:12,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 22:30:12,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 22:30:12,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 22:30:12,487 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 22:30:12,487 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 22:30:12,488 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condn.c [2024-10-13 22:30:13,795 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 22:30:13,976 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 22:30:13,977 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condn.c [2024-10-13 22:30:13,987 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fba63310c/bfc860f309e745408ba76b1d4519eac6/FLAG918f143c4 [2024-10-13 22:30:14,373 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fba63310c/bfc860f309e745408ba76b1d4519eac6 [2024-10-13 22:30:14,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 22:30:14,376 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 22:30:14,377 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 22:30:14,377 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 22:30:14,382 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 22:30:14,382 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:30:14" (1/1) ... [2024-10-13 22:30:14,383 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29a4f7ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:14, skipping insertion in model container [2024-10-13 22:30:14,383 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:30:14" (1/1) ... [2024-10-13 22:30:14,398 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 22:30:14,542 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-fpi/condn.c[588,601] [2024-10-13 22:30:14,559 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 22:30:14,568 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 22:30:14,581 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-fpi/condn.c[588,601] [2024-10-13 22:30:14,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 22:30:14,613 INFO L204 MainTranslator]: Completed translation [2024-10-13 22:30:14,614 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:14 WrapperNode [2024-10-13 22:30:14,615 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 22:30:14,616 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 22:30:14,617 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 22:30:14,617 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 22:30:14,624 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:14" (1/1) ... [2024-10-13 22:30:14,630 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:14" (1/1) ... [2024-10-13 22:30:14,656 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2024-10-13 22:30:14,656 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 22:30:14,657 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 22:30:14,658 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 22:30:14,658 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 22:30:14,668 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:14" (1/1) ... [2024-10-13 22:30:14,668 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:14" (1/1) ... [2024-10-13 22:30:14,670 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:14" (1/1) ... [2024-10-13 22:30:14,698 INFO L175 MemorySlicer]: Split 16 memory accesses to 3 slices as follows [2, 6, 8]. 50 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 0, 8]. The 3 writes are split as follows [0, 3, 0]. [2024-10-13 22:30:14,698 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:14" (1/1) ... [2024-10-13 22:30:14,699 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:14" (1/1) ... [2024-10-13 22:30:14,703 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:14" (1/1) ... [2024-10-13 22:30:14,706 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:14" (1/1) ... [2024-10-13 22:30:14,707 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:14" (1/1) ... [2024-10-13 22:30:14,708 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:14" (1/1) ... [2024-10-13 22:30:14,710 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 22:30:14,711 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 22:30:14,711 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 22:30:14,711 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 22:30:14,712 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:14" (1/1) ... [2024-10-13 22:30:14,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 22:30:14,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:30:14,749 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 22:30:14,752 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 22:30:14,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 22:30:14,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 22:30:14,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 22:30:14,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 22:30:14,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 22:30:14,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 22:30:14,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 22:30:14,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 22:30:14,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 22:30:14,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 22:30:14,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 22:30:14,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 22:30:14,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 22:30:14,903 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 22:30:14,906 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 22:30:15,124 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-13 22:30:15,125 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 22:30:15,166 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 22:30:15,168 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-13 22:30:15,168 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:30:15 BoogieIcfgContainer [2024-10-13 22:30:15,169 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 22:30:15,171 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 22:30:15,171 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 22:30:15,174 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 22:30:15,174 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:30:14" (1/3) ... [2024-10-13 22:30:15,175 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3441d5f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:30:15, skipping insertion in model container [2024-10-13 22:30:15,176 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:14" (2/3) ... [2024-10-13 22:30:15,176 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3441d5f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:30:15, skipping insertion in model container [2024-10-13 22:30:15,177 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:30:15" (3/3) ... [2024-10-13 22:30:15,178 INFO L112 eAbstractionObserver]: Analyzing ICFG condn.c [2024-10-13 22:30:15,194 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 22:30:15,194 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 22:30:15,263 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 22:30:15,270 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;@239ec0b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 22:30:15,271 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-13 22:30:15,276 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:15,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-13 22:30:15,282 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:15,282 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:15,283 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:15,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:15,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1236320892, now seen corresponding path program 1 times [2024-10-13 22:30:15,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:15,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123049385] [2024-10-13 22:30:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:15,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:15,448 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 22:30:15,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:15,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123049385] [2024-10-13 22:30:15,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123049385] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:30:15,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:30:15,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 22:30:15,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509029205] [2024-10-13 22:30:15,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:30:15,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 22:30:15,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:15,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 22:30:15,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 22:30:15,482 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:15,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:15,501 INFO L93 Difference]: Finished difference Result 33 states and 49 transitions. [2024-10-13 22:30:15,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 22:30:15,503 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-13 22:30:15,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:15,510 INFO L225 Difference]: With dead ends: 33 [2024-10-13 22:30:15,510 INFO L226 Difference]: Without dead ends: 15 [2024-10-13 22:30:15,512 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 22:30:15,516 INFO L432 NwaCegarLoop]: 18 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, 18 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 22:30:15,516 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:30:15,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-10-13 22:30:15,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-10-13 22:30:15,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:15,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2024-10-13 22:30:15,546 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2024-10-13 22:30:15,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:15,546 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2024-10-13 22:30:15,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:15,546 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2024-10-13 22:30:15,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-13 22:30:15,547 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:15,547 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:15,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 22:30:15,547 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:15,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:15,548 INFO L85 PathProgramCache]: Analyzing trace with hash -556262522, now seen corresponding path program 1 times [2024-10-13 22:30:15,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:15,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449356122] [2024-10-13 22:30:15,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:15,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:15,716 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 22:30:15,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:15,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449356122] [2024-10-13 22:30:15,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449356122] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:30:15,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:30:15,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 22:30:15,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4665151] [2024-10-13 22:30:15,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:30:15,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 22:30:15,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:15,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 22:30:15,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 22:30:15,720 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:15,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:15,786 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2024-10-13 22:30:15,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 22:30:15,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-13 22:30:15,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:15,787 INFO L225 Difference]: With dead ends: 34 [2024-10-13 22:30:15,788 INFO L226 Difference]: Without dead ends: 24 [2024-10-13 22:30:15,789 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 22:30:15,792 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:30:15,792 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 11 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:30:15,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-13 22:30:15,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2024-10-13 22:30:15,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:15,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2024-10-13 22:30:15,802 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2024-10-13 22:30:15,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:15,802 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2024-10-13 22:30:15,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:15,803 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-10-13 22:30:15,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-13 22:30:15,804 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:15,804 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:15,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 22:30:15,804 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:15,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:15,809 INFO L85 PathProgramCache]: Analyzing trace with hash -157564324, now seen corresponding path program 1 times [2024-10-13 22:30:15,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:15,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652029039] [2024-10-13 22:30:15,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:15,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 22:30:16,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:16,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652029039] [2024-10-13 22:30:16,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652029039] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:30:16,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158530219] [2024-10-13 22:30:16,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:16,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:16,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:30:16,374 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 22:30:16,375 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 22:30:16,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:16,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-13 22:30:16,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:30:16,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2024-10-13 22:30:16,685 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 17 treesize of output 9 [2024-10-13 22:30:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 22:30:16,704 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:30:16,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2024-10-13 22:30:16,848 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-13 22:30:16,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 23 [2024-10-13 22:30:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 22:30:16,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158530219] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:30:16,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:30:16,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2024-10-13 22:30:16,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649141694] [2024-10-13 22:30:16,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:30:16,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 22:30:16,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:16,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 22:30:16,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-10-13 22:30:16,871 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:17,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:17,073 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2024-10-13 22:30:17,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 22:30:17,073 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-13 22:30:17,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:17,074 INFO L225 Difference]: With dead ends: 38 [2024-10-13 22:30:17,074 INFO L226 Difference]: Without dead ends: 36 [2024-10-13 22:30:17,075 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2024-10-13 22:30:17,076 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 53 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:30:17,076 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 41 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:30:17,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-13 22:30:17,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 19. [2024-10-13 22:30:17,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:17,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-10-13 22:30:17,085 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 15 [2024-10-13 22:30:17,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:17,085 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-10-13 22:30:17,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:17,086 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-10-13 22:30:17,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-13 22:30:17,086 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:17,086 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:17,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-13 22:30:17,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:17,287 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:17,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:17,288 INFO L85 PathProgramCache]: Analyzing trace with hash 405597427, now seen corresponding path program 1 times [2024-10-13 22:30:17,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:17,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131669389] [2024-10-13 22:30:17,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:17,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 22:30:17,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:17,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131669389] [2024-10-13 22:30:17,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131669389] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:30:17,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712243363] [2024-10-13 22:30:17,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:17,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:17,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:30:17,378 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 22:30:17,380 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 22:30:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:17,433 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 22:30:17,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:30:17,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 22:30:17,486 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:30:17,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 22:30:17,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712243363] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:30:17,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:30:17,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-13 22:30:17,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087767857] [2024-10-13 22:30:17,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:30:17,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-13 22:30:17,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:17,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-13 22:30:17,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-13 22:30:17,540 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:17,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:17,637 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2024-10-13 22:30:17,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 22:30:17,638 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-13 22:30:17,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:17,639 INFO L225 Difference]: With dead ends: 52 [2024-10-13 22:30:17,639 INFO L226 Difference]: Without dead ends: 31 [2024-10-13 22:30:17,640 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-10-13 22:30:17,640 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:30:17,641 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 37 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:30:17,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-13 22:30:17,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2024-10-13 22:30:17,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:17,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2024-10-13 22:30:17,647 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 18 [2024-10-13 22:30:17,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:17,647 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2024-10-13 22:30:17,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:17,648 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2024-10-13 22:30:17,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-13 22:30:17,649 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:17,649 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:17,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-13 22:30:17,853 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 22:30:17,854 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:17,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:17,856 INFO L85 PathProgramCache]: Analyzing trace with hash -284437431, now seen corresponding path program 2 times [2024-10-13 22:30:17,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:17,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045092846] [2024-10-13 22:30:17,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:17,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:30:18,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:18,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045092846] [2024-10-13 22:30:18,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045092846] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:30:18,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525231651] [2024-10-13 22:30:18,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:30:18,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:18,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:30:18,410 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 22:30:18,411 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 22:30:18,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:30:18,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:30:18,481 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-13 22:30:18,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:30:18,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2024-10-13 22:30:18,632 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 17 treesize of output 9 [2024-10-13 22:30:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 22:30:18,647 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:30:18,761 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 38 treesize of output 32 [2024-10-13 22:30:18,767 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-13 22:30:18,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 23 [2024-10-13 22:30:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 22:30:18,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525231651] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:30:18,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:30:18,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 24 [2024-10-13 22:30:18,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406995009] [2024-10-13 22:30:18,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:30:18,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-13 22:30:18,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:18,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-13 22:30:18,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2024-10-13 22:30:18,819 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:19,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:19,302 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2024-10-13 22:30:19,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-13 22:30:19,303 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-13 22:30:19,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:19,304 INFO L225 Difference]: With dead ends: 49 [2024-10-13 22:30:19,304 INFO L226 Difference]: Without dead ends: 47 [2024-10-13 22:30:19,304 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=1249, Unknown=0, NotChecked=0, Total=1560 [2024-10-13 22:30:19,305 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 162 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:30:19,305 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 57 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 22:30:19,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-13 22:30:19,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2024-10-13 22:30:19,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:19,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-10-13 22:30:19,311 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 22 [2024-10-13 22:30:19,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:19,312 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-10-13 22:30:19,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:19,312 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-10-13 22:30:19,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-13 22:30:19,313 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:19,313 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:19,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 22:30:19,517 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 22:30:19,518 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:19,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:19,518 INFO L85 PathProgramCache]: Analyzing trace with hash 300087270, now seen corresponding path program 3 times [2024-10-13 22:30:19,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:19,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278775674] [2024-10-13 22:30:19,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:19,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 22:30:19,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:19,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278775674] [2024-10-13 22:30:19,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278775674] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:30:19,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251286098] [2024-10-13 22:30:19,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:30:19,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:19,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:30:19,650 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 22:30:19,651 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 22:30:19,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 22:30:19,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:30:19,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 22:30:19,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:30:19,789 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 22:30:19,789 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:30:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 22:30:19,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251286098] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:30:19,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:30:19,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-13 22:30:19,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093854369] [2024-10-13 22:30:19,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:30:19,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 22:30:19,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:19,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 22:30:19,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-13 22:30:19,849 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:19,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:19,953 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2024-10-13 22:30:19,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 22:30:19,955 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-10-13 22:30:19,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:19,955 INFO L225 Difference]: With dead ends: 68 [2024-10-13 22:30:19,956 INFO L226 Difference]: Without dead ends: 38 [2024-10-13 22:30:19,956 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 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 22:30:19,957 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 74 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:30:19,957 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 34 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:30:19,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-13 22:30:19,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2024-10-13 22:30:19,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:19,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2024-10-13 22:30:19,967 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 25 [2024-10-13 22:30:19,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:19,967 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2024-10-13 22:30:19,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:19,968 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2024-10-13 22:30:19,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-13 22:30:19,969 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:19,969 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:19,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 22:30:20,169 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 22:30:20,170 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:20,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:20,170 INFO L85 PathProgramCache]: Analyzing trace with hash 978595260, now seen corresponding path program 4 times [2024-10-13 22:30:20,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:20,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881309285] [2024-10-13 22:30:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:20,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:30:20,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:20,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881309285] [2024-10-13 22:30:20,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881309285] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:30:20,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455681898] [2024-10-13 22:30:20,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 22:30:20,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:20,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:30:20,932 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 22:30:20,933 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 22:30:20,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 22:30:20,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:30:20,998 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-13 22:30:21,000 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:30:21,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 46 treesize of output 15 [2024-10-13 22:30:21,187 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 21 treesize of output 9 [2024-10-13 22:30:21,205 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 22:30:21,205 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:30:21,350 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 38 treesize of output 32 [2024-10-13 22:30:21,361 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-13 22:30:21,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 23 [2024-10-13 22:30:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 22:30:21,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455681898] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:30:21,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:30:21,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 11] total 31 [2024-10-13 22:30:21,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523980389] [2024-10-13 22:30:21,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:30:21,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-13 22:30:21,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:21,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-13 22:30:21,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2024-10-13 22:30:21,374 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:21,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:21,960 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2024-10-13 22:30:21,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-13 22:30:21,961 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-10-13 22:30:21,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:21,961 INFO L225 Difference]: With dead ends: 60 [2024-10-13 22:30:21,961 INFO L226 Difference]: Without dead ends: 58 [2024-10-13 22:30:21,962 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2024-10-13 22:30:21,963 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 143 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 22:30:21,963 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 95 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 22:30:21,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-13 22:30:21,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2024-10-13 22:30:21,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:21,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2024-10-13 22:30:21,970 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 29 [2024-10-13 22:30:21,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:21,970 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2024-10-13 22:30:21,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:21,970 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2024-10-13 22:30:21,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-13 22:30:21,971 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:21,971 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:21,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-13 22:30:22,175 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 22:30:22,176 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:22,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:22,176 INFO L85 PathProgramCache]: Analyzing trace with hash -901495405, now seen corresponding path program 5 times [2024-10-13 22:30:22,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:22,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511143265] [2024-10-13 22:30:22,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:22,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:22,316 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-13 22:30:22,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:22,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511143265] [2024-10-13 22:30:22,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511143265] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:30:22,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341857046] [2024-10-13 22:30:22,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 22:30:22,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:22,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:30:22,319 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 22:30:22,320 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 22:30:22,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-13 22:30:22,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:30:22,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 22:30:22,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:30:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 22:30:22,516 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:30:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 22:30:22,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341857046] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:30:22,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:30:22,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-10-13 22:30:22,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621337580] [2024-10-13 22:30:22,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:30:22,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-13 22:30:22,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:22,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-13 22:30:22,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-10-13 22:30:22,596 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:22,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:22,748 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2024-10-13 22:30:22,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 22:30:22,748 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-10-13 22:30:22,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:22,749 INFO L225 Difference]: With dead ends: 84 [2024-10-13 22:30:22,749 INFO L226 Difference]: Without dead ends: 45 [2024-10-13 22:30:22,750 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 51 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2024-10-13 22:30:22,750 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:30:22,750 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 47 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:30:22,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-13 22:30:22,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2024-10-13 22:30:22,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2024-10-13 22:30:22,763 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 32 [2024-10-13 22:30:22,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:22,763 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2024-10-13 22:30:22,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:22,763 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2024-10-13 22:30:22,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-13 22:30:22,765 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:22,765 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:22,782 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 22:30:22,966 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 22:30:22,966 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:22,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:22,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1414642665, now seen corresponding path program 6 times [2024-10-13 22:30:22,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:22,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809319564] [2024-10-13 22:30:22,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:22,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:30:23,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:23,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809319564] [2024-10-13 22:30:23,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809319564] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:30:23,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615083809] [2024-10-13 22:30:23,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 22:30:23,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:23,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:30:23,613 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 22:30:23,614 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 22:30:23,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-13 22:30:23,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:30:23,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-13 22:30:23,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:30:23,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2024-10-13 22:30:23,854 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 25 treesize of output 13 [2024-10-13 22:30:23,924 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:30:23,925 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 1 case distinctions, treesize of input 45 treesize of output 25 [2024-10-13 22:30:24,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:30:24,309 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-13 22:30:24,312 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:30:24,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 17 [2024-10-13 22:30:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-13 22:30:24,337 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:30:29,336 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 176 treesize of output 158 [2024-10-13 22:30:29,349 INFO L349 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2024-10-13 22:30:29,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1106 treesize of output 836 [2024-10-13 22:30:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-13 22:30:29,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615083809] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:30:29,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:30:29,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 19] total 44 [2024-10-13 22:30:29,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710305165] [2024-10-13 22:30:29,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:30:29,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-13 22:30:29,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:29,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-13 22:30:29,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=1537, Unknown=1, NotChecked=0, Total=1892 [2024-10-13 22:30:29,510 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:31,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:31,840 INFO L93 Difference]: Finished difference Result 146 states and 171 transitions. [2024-10-13 22:30:31,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-10-13 22:30:31,841 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-10-13 22:30:31,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:31,843 INFO L225 Difference]: With dead ends: 146 [2024-10-13 22:30:31,843 INFO L226 Difference]: Without dead ends: 96 [2024-10-13 22:30:31,846 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2263 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1469, Invalid=5670, Unknown=1, NotChecked=0, Total=7140 [2024-10-13 22:30:31,846 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 168 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-13 22:30:31,847 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 179 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-13 22:30:31,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-10-13 22:30:31,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 64. [2024-10-13 22:30:31,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 63 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:31,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2024-10-13 22:30:31,858 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 36 [2024-10-13 22:30:31,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:31,859 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2024-10-13 22:30:31,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:31,859 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2024-10-13 22:30:31,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-13 22:30:31,860 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:31,860 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:31,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-13 22:30:32,064 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 22:30:32,065 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:32,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:32,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1682452581, now seen corresponding path program 1 times [2024-10-13 22:30:32,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:32,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54900416] [2024-10-13 22:30:32,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:32,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:30:32,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:32,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54900416] [2024-10-13 22:30:32,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54900416] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:30:32,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821787939] [2024-10-13 22:30:32,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:32,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:32,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:30:32,249 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 22:30:32,250 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 22:30:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:32,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-13 22:30:32,330 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:30:32,449 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:30:32,449 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:30:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:30:32,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821787939] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:30:32,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:30:32,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-10-13 22:30:32,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662425] [2024-10-13 22:30:32,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:30:32,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 22:30:32,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:32,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 22:30:32,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-10-13 22:30:32,546 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:32,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:32,716 INFO L93 Difference]: Finished difference Result 146 states and 175 transitions. [2024-10-13 22:30:32,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 22:30:32,717 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-10-13 22:30:32,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:32,719 INFO L225 Difference]: With dead ends: 146 [2024-10-13 22:30:32,719 INFO L226 Difference]: Without dead ends: 89 [2024-10-13 22:30:32,720 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2024-10-13 22:30:32,720 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 65 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:30:32,721 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 49 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:30:32,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-10-13 22:30:32,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2024-10-13 22:30:32,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.234375) internal successors, (79), 64 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:32,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2024-10-13 22:30:32,739 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 39 [2024-10-13 22:30:32,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:32,740 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2024-10-13 22:30:32,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:32,740 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2024-10-13 22:30:32,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-13 22:30:32,741 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:32,741 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:32,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-13 22:30:32,941 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,SelfDestructingSolverStorable9 [2024-10-13 22:30:32,943 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:32,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:32,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1730549267, now seen corresponding path program 2 times [2024-10-13 22:30:32,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:32,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898469286] [2024-10-13 22:30:32,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:32,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:30:33,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:33,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898469286] [2024-10-13 22:30:33,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898469286] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:30:33,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084927077] [2024-10-13 22:30:33,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:30:33,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:33,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:30:33,649 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 22:30:33,650 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 22:30:33,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:30:33,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:30:33,747 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-13 22:30:33,749 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:30:33,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 22:30:33,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:30:33,891 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 27 treesize of output 11 [2024-10-13 22:30:34,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-13 22:30:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 22:30:34,070 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:30:34,328 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 25 treesize of output 23 [2024-10-13 22:30:34,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2024-10-13 22:30:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:30:34,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084927077] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:30:34,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:30:34,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 14] total 41 [2024-10-13 22:30:34,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152850715] [2024-10-13 22:30:34,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:30:34,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-10-13 22:30:34,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:34,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-10-13 22:30:34,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1426, Unknown=0, NotChecked=0, Total=1640 [2024-10-13 22:30:34,439 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand has 41 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 41 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:35,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:35,263 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2024-10-13 22:30:35,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-13 22:30:35,264 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 41 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-10-13 22:30:35,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:35,264 INFO L225 Difference]: With dead ends: 113 [2024-10-13 22:30:35,264 INFO L226 Difference]: Without dead ends: 111 [2024-10-13 22:30:35,266 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=474, Invalid=2832, Unknown=0, NotChecked=0, Total=3306 [2024-10-13 22:30:35,266 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 138 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-13 22:30:35,266 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 188 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-13 22:30:35,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-10-13 22:30:35,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 73. [2024-10-13 22:30:35,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.25) internal successors, (90), 72 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:35,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2024-10-13 22:30:35,289 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 40 [2024-10-13 22:30:35,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:35,289 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2024-10-13 22:30:35,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 41 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:35,290 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2024-10-13 22:30:35,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-13 22:30:35,293 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:35,293 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:35,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-13 22:30:35,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:35,498 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:35,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:35,498 INFO L85 PathProgramCache]: Analyzing trace with hash -734925677, now seen corresponding path program 3 times [2024-10-13 22:30:35,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:35,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535663451] [2024-10-13 22:30:35,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:35,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:30:36,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:36,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535663451] [2024-10-13 22:30:36,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535663451] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:30:36,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547328487] [2024-10-13 22:30:36,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:30:36,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:36,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:30:36,298 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 22:30:36,299 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 22:30:36,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-13 22:30:36,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:30:36,394 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-13 22:30:36,396 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:30:36,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 54 treesize of output 15 [2024-10-13 22:30:36,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2024-10-13 22:30:36,999 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 19 treesize of output 7 [2024-10-13 22:30:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-13 22:30:37,027 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:30:37,474 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 54 treesize of output 48 [2024-10-13 22:30:37,480 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-13 22:30:37,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 58 [2024-10-13 22:30:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-13 22:30:37,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547328487] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:30:37,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:30:37,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 22] total 55 [2024-10-13 22:30:37,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359572587] [2024-10-13 22:30:37,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:30:37,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-10-13 22:30:37,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:37,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-10-13 22:30:37,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=2599, Unknown=0, NotChecked=0, Total=2970 [2024-10-13 22:30:37,546 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand has 55 states, 55 states have (on average 1.6545454545454545) internal successors, (91), 55 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:41,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:41,296 INFO L93 Difference]: Finished difference Result 268 states and 318 transitions. [2024-10-13 22:30:41,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2024-10-13 22:30:41,297 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.6545454545454545) internal successors, (91), 55 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-10-13 22:30:41,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:41,299 INFO L225 Difference]: With dead ends: 268 [2024-10-13 22:30:41,299 INFO L226 Difference]: Without dead ends: 266 [2024-10-13 22:30:41,303 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7161 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3068, Invalid=20188, Unknown=0, NotChecked=0, Total=23256 [2024-10-13 22:30:41,303 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 841 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:30:41,303 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 311 Invalid, 1989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 1500 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-13 22:30:41,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2024-10-13 22:30:41,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 56. [2024-10-13 22:30:41,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:41,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2024-10-13 22:30:41,321 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 40 [2024-10-13 22:30:41,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:41,321 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2024-10-13 22:30:41,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.6545454545454545) internal successors, (91), 55 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:41,322 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2024-10-13 22:30:41,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-13 22:30:41,322 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:41,322 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:41,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-13 22:30:41,523 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,SelfDestructingSolverStorable11 [2024-10-13 22:30:41,523 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:41,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:41,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1989088804, now seen corresponding path program 4 times [2024-10-13 22:30:41,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:41,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100872257] [2024-10-13 22:30:41,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:41,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:30:42,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:42,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100872257] [2024-10-13 22:30:42,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100872257] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:30:42,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998544111] [2024-10-13 22:30:42,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 22:30:42,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:42,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:30:42,133 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 22:30:42,134 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 22:30:42,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 22:30:42,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:30:42,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-13 22:30:42,214 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:30:42,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-10-13 22:30:42,404 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 19 treesize of output 7 [2024-10-13 22:30:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:30:42,422 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:30:42,582 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 18 treesize of output 16 [2024-10-13 22:30:42,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2024-10-13 22:30:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:30:42,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998544111] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:30:42,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:30:42,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 14] total 34 [2024-10-13 22:30:42,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171730418] [2024-10-13 22:30:42,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:30:42,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-13 22:30:42,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:42,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-13 22:30:42,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2024-10-13 22:30:42,606 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 34 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:43,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:43,353 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2024-10-13 22:30:43,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-13 22:30:43,353 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 34 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-10-13 22:30:43,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:43,354 INFO L225 Difference]: With dead ends: 100 [2024-10-13 22:30:43,354 INFO L226 Difference]: Without dead ends: 98 [2024-10-13 22:30:43,355 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=347, Invalid=2305, Unknown=0, NotChecked=0, Total=2652 [2024-10-13 22:30:43,355 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 166 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-13 22:30:43,356 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 176 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-13 22:30:43,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-10-13 22:30:43,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 68. [2024-10-13 22:30:43,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 67 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:43,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2024-10-13 22:30:43,371 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 43 [2024-10-13 22:30:43,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:43,372 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2024-10-13 22:30:43,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 34 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:43,372 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2024-10-13 22:30:43,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-13 22:30:43,373 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:43,373 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:43,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-13 22:30:43,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-13 22:30:43,573 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:43,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:43,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1906843892, now seen corresponding path program 7 times [2024-10-13 22:30:43,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:43,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719736300] [2024-10-13 22:30:43,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:43,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:43,800 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-13 22:30:43,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:43,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719736300] [2024-10-13 22:30:43,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719736300] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:30:43,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667077252] [2024-10-13 22:30:43,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 22:30:43,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:43,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:30:43,802 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:30:43,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-13 22:30:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:43,903 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-13 22:30:43,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:30:44,057 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-13 22:30:44,057 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:30:44,156 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-13 22:30:44,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667077252] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:30:44,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:30:44,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-10-13 22:30:44,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824038403] [2024-10-13 22:30:44,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:30:44,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-13 22:30:44,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:44,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-13 22:30:44,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2024-10-13 22:30:44,157 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:44,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:44,372 INFO L93 Difference]: Finished difference Result 174 states and 206 transitions. [2024-10-13 22:30:44,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-13 22:30:44,372 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-10-13 22:30:44,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:44,373 INFO L225 Difference]: With dead ends: 174 [2024-10-13 22:30:44,373 INFO L226 Difference]: Without dead ends: 97 [2024-10-13 22:30:44,373 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 73 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2024-10-13 22:30:44,374 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 129 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:30:44,374 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 77 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 22:30:44,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-10-13 22:30:44,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 69. [2024-10-13 22:30:44,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 68 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:44,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2024-10-13 22:30:44,388 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 46 [2024-10-13 22:30:44,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:44,389 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2024-10-13 22:30:44,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:44,389 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2024-10-13 22:30:44,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-13 22:30:44,390 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:44,390 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:44,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-13 22:30:44,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-13 22:30:44,593 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:44,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:44,594 INFO L85 PathProgramCache]: Analyzing trace with hash -195355770, now seen corresponding path program 8 times [2024-10-13 22:30:44,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:44,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216620759] [2024-10-13 22:30:44,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:44,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:30:45,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:45,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216620759] [2024-10-13 22:30:45,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216620759] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:30:45,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623920848] [2024-10-13 22:30:45,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:30:45,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:45,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:30:45,548 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:30:45,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-13 22:30:45,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:30:45,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:30:45,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-13 22:30:45,639 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:30:45,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2024-10-13 22:30:45,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:30:45,883 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 29 treesize of output 13 [2024-10-13 22:30:46,081 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 17 treesize of output 9 [2024-10-13 22:30:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 22:30:46,112 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:30:46,790 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 45 treesize of output 39 [2024-10-13 22:30:46,795 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-13 22:30:46,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 53 [2024-10-13 22:30:46,824 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-13 22:30:46,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623920848] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:30:46,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:30:46,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17, 17] total 49 [2024-10-13 22:30:46,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631450974] [2024-10-13 22:30:46,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:30:46,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-13 22:30:46,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:46,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-13 22:30:46,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2112, Unknown=0, NotChecked=0, Total=2352 [2024-10-13 22:30:46,827 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 49 states, 49 states have (on average 2.5714285714285716) internal successors, (126), 49 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:48,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:48,253 INFO L93 Difference]: Finished difference Result 101 states and 115 transitions. [2024-10-13 22:30:48,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-13 22:30:48,253 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.5714285714285716) internal successors, (126), 49 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-10-13 22:30:48,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:48,254 INFO L225 Difference]: With dead ends: 101 [2024-10-13 22:30:48,255 INFO L226 Difference]: Without dead ends: 99 [2024-10-13 22:30:48,256 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=770, Invalid=5710, Unknown=0, NotChecked=0, Total=6480 [2024-10-13 22:30:48,257 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 250 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-13 22:30:48,257 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 215 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1386 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-13 22:30:48,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-10-13 22:30:48,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 63. [2024-10-13 22:30:48,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 62 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:48,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2024-10-13 22:30:48,271 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 47 [2024-10-13 22:30:48,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:48,271 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2024-10-13 22:30:48,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.5714285714285716) internal successors, (126), 49 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:48,271 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2024-10-13 22:30:48,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-13 22:30:48,272 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:48,272 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:48,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-13 22:30:48,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-13 22:30:48,473 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:48,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:48,473 INFO L85 PathProgramCache]: Analyzing trace with hash -157938807, now seen corresponding path program 9 times [2024-10-13 22:30:48,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:48,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082812888] [2024-10-13 22:30:48,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:48,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:48,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:30:49,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:49,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082812888] [2024-10-13 22:30:49,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082812888] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:30:49,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629426862] [2024-10-13 22:30:49,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:30:49,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:49,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:30:49,396 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:30:49,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-13 22:30:49,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-13 22:30:49,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:30:49,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-13 22:30:49,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:30:49,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 56 treesize of output 17 [2024-10-13 22:30:50,192 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-10-13 22:30:50,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 12 [2024-10-13 22:30:50,219 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 50 proven. 27 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-13 22:30:50,219 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:30:50,894 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 45 treesize of output 39 [2024-10-13 22:30:50,898 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-13 22:30:50,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 28 [2024-10-13 22:30:51,099 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 27 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 22:30:51,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629426862] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:30:51,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:30:51,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 23] total 54 [2024-10-13 22:30:51,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145294634] [2024-10-13 22:30:51,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:30:51,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-10-13 22:30:51,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:51,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-10-13 22:30:51,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=2504, Unknown=0, NotChecked=0, Total=2862 [2024-10-13 22:30:51,101 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 54 states, 54 states have (on average 1.962962962962963) internal successors, (106), 54 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:56,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:56,611 INFO L93 Difference]: Finished difference Result 314 states and 366 transitions. [2024-10-13 22:30:56,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2024-10-13 22:30:56,611 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.962962962962963) internal successors, (106), 54 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-10-13 22:30:56,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:56,612 INFO L225 Difference]: With dead ends: 314 [2024-10-13 22:30:56,612 INFO L226 Difference]: Without dead ends: 129 [2024-10-13 22:30:56,615 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 67 SyntacticMatches, 8 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10351 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=3730, Invalid=29942, Unknown=0, NotChecked=0, Total=33672 [2024-10-13 22:30:56,617 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 719 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:30:56,617 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [719 Valid, 270 Invalid, 1853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-13 22:30:56,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-10-13 22:30:56,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 67. [2024-10-13 22:30:56,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.196969696969697) internal successors, (79), 66 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:56,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2024-10-13 22:30:56,631 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 50 [2024-10-13 22:30:56,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:56,631 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2024-10-13 22:30:56,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.962962962962963) internal successors, (106), 54 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:56,631 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2024-10-13 22:30:56,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-13 22:30:56,632 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:56,632 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:56,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-13 22:30:56,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:56,832 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:56,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:56,833 INFO L85 PathProgramCache]: Analyzing trace with hash 703877493, now seen corresponding path program 5 times [2024-10-13 22:30:56,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:56,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988932741] [2024-10-13 22:30:56,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:56,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:56,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:57,386 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 22:30:57,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:57,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988932741] [2024-10-13 22:30:57,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988932741] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:30:57,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773832064] [2024-10-13 22:30:57,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 22:30:57,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:57,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:30:57,388 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:30:57,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-13 22:30:57,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-10-13 22:30:57,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:30:57,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-13 22:30:57,597 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:30:57,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 22:30:57,826 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 23 treesize of output 11 [2024-10-13 22:30:58,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-13 22:30:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 22:30:58,039 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:30:59,545 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 26 treesize of output 24 [2024-10-13 22:30:59,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2024-10-13 22:30:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 109 refuted. 1 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-13 22:30:59,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773832064] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:30:59,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:30:59,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 42 [2024-10-13 22:30:59,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474787153] [2024-10-13 22:30:59,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:30:59,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-13 22:30:59,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:59,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-13 22:30:59,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1553, Unknown=2, NotChecked=0, Total=1722 [2024-10-13 22:30:59,567 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 42 states, 42 states have (on average 3.0476190476190474) internal successors, (128), 42 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:31:00,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:31:00,571 INFO L93 Difference]: Finished difference Result 151 states and 170 transitions. [2024-10-13 22:31:00,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-13 22:31:00,571 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0476190476190474) internal successors, (128), 42 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2024-10-13 22:31:00,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:31:00,572 INFO L225 Difference]: With dead ends: 151 [2024-10-13 22:31:00,572 INFO L226 Difference]: Without dead ends: 149 [2024-10-13 22:31:00,573 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=419, Invalid=3485, Unknown=2, NotChecked=0, Total=3906 [2024-10-13 22:31:00,573 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 139 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-13 22:31:00,574 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 290 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1435 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-13 22:31:00,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-10-13 22:31:00,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 72. [2024-10-13 22:31:00,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 71 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:31:00,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2024-10-13 22:31:00,590 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 54 [2024-10-13 22:31:00,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:31:00,590 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2024-10-13 22:31:00,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0476190476190474) internal successors, (128), 42 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:31:00,590 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2024-10-13 22:31:00,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-13 22:31:00,591 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:31:00,591 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:31:00,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-13 22:31:00,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-13 22:31:00,791 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:31:00,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:31:00,792 INFO L85 PathProgramCache]: Analyzing trace with hash 2136777561, now seen corresponding path program 6 times [2024-10-13 22:31:00,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:31:00,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062163575] [2024-10-13 22:31:00,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:31:00,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:31:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:31:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-13 22:31:01,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:31:01,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062163575] [2024-10-13 22:31:01,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062163575] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:31:01,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481948724] [2024-10-13 22:31:01,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 22:31:01,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:31:01,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:31:01,068 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:31:01,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-13 22:31:01,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-10-13 22:31:01,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:31:01,408 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-13 22:31:01,409 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:31:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 92 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-13 22:31:01,581 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:31:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 92 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-13 22:31:01,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481948724] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:31:01,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:31:01,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2024-10-13 22:31:01,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314950526] [2024-10-13 22:31:01,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:31:01,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-13 22:31:01,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:31:01,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-13 22:31:01,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2024-10-13 22:31:01,714 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:31:01,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:31:01,983 INFO L93 Difference]: Finished difference Result 200 states and 235 transitions. [2024-10-13 22:31:01,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-13 22:31:01,984 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-10-13 22:31:01,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:31:01,984 INFO L225 Difference]: With dead ends: 200 [2024-10-13 22:31:01,984 INFO L226 Difference]: Without dead ends: 158 [2024-10-13 22:31:01,985 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 89 SyntacticMatches, 15 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2024-10-13 22:31:01,985 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 211 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:31:01,985 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 99 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 22:31:01,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-10-13 22:31:02,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 120. [2024-10-13 22:31:02,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.2016806722689075) internal successors, (143), 119 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:31:02,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 143 transitions. [2024-10-13 22:31:02,014 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 143 transitions. Word has length 57 [2024-10-13 22:31:02,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:31:02,014 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 143 transitions. [2024-10-13 22:31:02,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:31:02,015 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 143 transitions. [2024-10-13 22:31:02,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-13 22:31:02,015 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:31:02,015 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:31:02,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-13 22:31:02,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-13 22:31:02,216 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:31:02,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:31:02,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1189174074, now seen corresponding path program 7 times [2024-10-13 22:31:02,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:31:02,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761493424] [2024-10-13 22:31:02,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:31:02,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:31:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:31:02,833 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:31:02,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:31:02,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761493424] [2024-10-13 22:31:02,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761493424] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:31:02,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029152656] [2024-10-13 22:31:02,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 22:31:02,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:31:02,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:31:02,835 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:31:02,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-13 22:31:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:31:02,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-10-13 22:31:02,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:31:03,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 22:31:03,207 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:31:03,207 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 1 case distinctions, treesize of input 43 treesize of output 23 [2024-10-13 22:31:03,576 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:31:03,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2024-10-13 22:31:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 22:31:03,600 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:31:04,045 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 74 treesize of output 66 [2024-10-13 22:31:04,051 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-13 22:31:04,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 96 [2024-10-13 22:31:04,328 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 2 proven. 125 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-13 22:31:04,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029152656] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:31:04,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:31:04,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 21] total 58 [2024-10-13 22:31:04,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229639127] [2024-10-13 22:31:04,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:31:04,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-10-13 22:31:04,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:31:04,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-10-13 22:31:04,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2977, Unknown=0, NotChecked=0, Total=3306 [2024-10-13 22:31:04,331 INFO L87 Difference]: Start difference. First operand 120 states and 143 transitions. Second operand has 58 states, 58 states have (on average 2.6724137931034484) internal successors, (155), 58 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:31:06,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:31:06,017 INFO L93 Difference]: Finished difference Result 239 states and 267 transitions. [2024-10-13 22:31:06,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-10-13 22:31:06,018 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.6724137931034484) internal successors, (155), 58 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-10-13 22:31:06,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:31:06,019 INFO L225 Difference]: With dead ends: 239 [2024-10-13 22:31:06,019 INFO L226 Difference]: Without dead ends: 165 [2024-10-13 22:31:06,020 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=770, Invalid=6886, Unknown=0, NotChecked=0, Total=7656 [2024-10-13 22:31:06,020 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 179 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 2235 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 2282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-13 22:31:06,021 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 409 Invalid, 2282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2235 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-13 22:31:06,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-10-13 22:31:06,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 96. [2024-10-13 22:31:06,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 95 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:31:06,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2024-10-13 22:31:06,055 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 57 [2024-10-13 22:31:06,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:31:06,056 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2024-10-13 22:31:06,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.6724137931034484) internal successors, (155), 58 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:31:06,056 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2024-10-13 22:31:06,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-13 22:31:06,057 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:31:06,057 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:31:06,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-13 22:31:06,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:31:06,257 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:31:06,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:31:06,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1741047417, now seen corresponding path program 8 times [2024-10-13 22:31:06,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:31:06,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513596219] [2024-10-13 22:31:06,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:31:06,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:31:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:31:07,421 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 1 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:31:07,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:31:07,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513596219] [2024-10-13 22:31:07,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513596219] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:31:07,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601677107] [2024-10-13 22:31:07,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:31:07,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:31:07,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:31:07,423 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:31:07,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-13 22:31:07,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:31:07,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:31:07,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-10-13 22:31:07,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:31:07,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2024-10-13 22:31:07,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:31:07,885 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 29 treesize of output 13 [2024-10-13 22:31:07,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:31:07,927 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 29 treesize of output 13 [2024-10-13 22:31:08,167 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 17 treesize of output 9 [2024-10-13 22:31:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 22:31:08,193 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:31:32,500 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 45 treesize of output 39 [2024-10-13 22:31:32,505 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-13 22:31:32,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 53 [2024-10-13 22:31:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 125 refuted. 6 times theorem prover too weak. 37 trivial. 0 not checked. [2024-10-13 22:31:32,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601677107] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:31:32,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:31:32,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 20, 20] total 60 [2024-10-13 22:31:32,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637419863] [2024-10-13 22:31:32,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:31:32,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-10-13 22:31:32,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:31:32,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-10-13 22:31:32,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=3206, Unknown=11, NotChecked=0, Total=3540 [2024-10-13 22:31:32,531 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand has 60 states, 60 states have (on average 2.6) internal successors, (156), 60 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:31:34,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:31:34,462 INFO L93 Difference]: Finished difference Result 135 states and 150 transitions. [2024-10-13 22:31:34,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-10-13 22:31:34,463 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.6) internal successors, (156), 60 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-10-13 22:31:34,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:31:34,463 INFO L225 Difference]: With dead ends: 135 [2024-10-13 22:31:34,463 INFO L226 Difference]: Without dead ends: 133 [2024-10-13 22:31:34,464 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2773 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=1098, Invalid=8991, Unknown=11, NotChecked=0, Total=10100 [2024-10-13 22:31:34,464 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 340 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 2001 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 2001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-13 22:31:34,465 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 303 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 2001 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-13 22:31:34,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-10-13 22:31:34,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 65. [2024-10-13 22:31:34,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.171875) internal successors, (75), 64 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:31:34,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2024-10-13 22:31:34,483 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 58 [2024-10-13 22:31:34,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:31:34,483 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2024-10-13 22:31:34,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.6) internal successors, (156), 60 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:31:34,483 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2024-10-13 22:31:34,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-10-13 22:31:34,484 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:31:34,484 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:31:34,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-13 22:31:34,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:31:34,684 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:31:34,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:31:34,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1335180503, now seen corresponding path program 10 times [2024-10-13 22:31:34,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:31:34,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376840887] [2024-10-13 22:31:34,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:31:34,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:31:34,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:31:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:31:35,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:31:35,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376840887] [2024-10-13 22:31:35,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376840887] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:31:35,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017193165] [2024-10-13 22:31:35,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 22:31:35,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:31:35,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:31:35,574 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:31:35,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-13 22:31:35,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 22:31:35,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:31:35,699 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-13 22:31:35,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:31:35,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 46 treesize of output 15 [2024-10-13 22:31:35,995 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 21 treesize of output 9 [2024-10-13 22:31:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-13 22:31:36,019 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:31:36,372 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 38 treesize of output 32 [2024-10-13 22:31:36,375 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-13 22:31:36,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 23 [2024-10-13 22:31:36,396 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-13 22:31:36,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017193165] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:31:36,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:31:36,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 21, 21] total 51 [2024-10-13 22:31:36,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376268120] [2024-10-13 22:31:36,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:31:36,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-10-13 22:31:36,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:31:36,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-10-13 22:31:36,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2024-10-13 22:31:36,398 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 51 states, 51 states have (on average 2.764705882352941) internal successors, (141), 51 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:31:38,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:31:38,149 INFO L93 Difference]: Finished difference Result 115 states and 129 transitions. [2024-10-13 22:31:38,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-10-13 22:31:38,150 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.764705882352941) internal successors, (141), 51 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2024-10-13 22:31:38,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:31:38,150 INFO L225 Difference]: With dead ends: 115 [2024-10-13 22:31:38,150 INFO L226 Difference]: Without dead ends: 113 [2024-10-13 22:31:38,151 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=761, Invalid=6895, Unknown=0, NotChecked=0, Total=7656 [2024-10-13 22:31:38,151 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 274 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 2199 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 2268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-13 22:31:38,152 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 301 Invalid, 2268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2199 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-13 22:31:38,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-10-13 22:31:38,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 68. [2024-10-13 22:31:38,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.164179104477612) internal successors, (78), 67 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:31:38,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2024-10-13 22:31:38,170 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 64 [2024-10-13 22:31:38,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:31:38,170 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2024-10-13 22:31:38,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.764705882352941) internal successors, (141), 51 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:31:38,170 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2024-10-13 22:31:38,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-10-13 22:31:38,171 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:31:38,171 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:31:38,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-13 22:31:38,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:31:38,371 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:31:38,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:31:38,372 INFO L85 PathProgramCache]: Analyzing trace with hash -665117434, now seen corresponding path program 11 times [2024-10-13 22:31:38,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:31:38,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348352875] [2024-10-13 22:31:38,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:31:38,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:31:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:31:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-10-13 22:31:38,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:31:38,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348352875] [2024-10-13 22:31:38,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348352875] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:31:38,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758395123] [2024-10-13 22:31:38,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 22:31:38,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:31:38,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:31:38,659 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:31:38,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-13 22:31:38,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-10-13 22:31:38,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:31:38,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-13 22:31:38,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:31:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 100 proven. 92 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-13 22:31:39,133 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:31:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 100 proven. 92 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-13 22:31:39,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758395123] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:31:39,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:31:39,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2024-10-13 22:31:39,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552643585] [2024-10-13 22:31:39,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:31:39,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-13 22:31:39,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:31:39,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-13 22:31:39,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2024-10-13 22:31:39,301 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 32 states, 32 states have (on average 3.28125) internal successors, (105), 32 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:31:39,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:31:39,557 INFO L93 Difference]: Finished difference Result 164 states and 189 transitions. [2024-10-13 22:31:39,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-13 22:31:39,558 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.28125) internal successors, (105), 32 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2024-10-13 22:31:39,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:31:39,558 INFO L225 Difference]: With dead ends: 164 [2024-10-13 22:31:39,558 INFO L226 Difference]: Without dead ends: 80 [2024-10-13 22:31:39,559 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 106 SyntacticMatches, 17 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2024-10-13 22:31:39,559 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 232 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:31:39,559 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 85 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 22:31:39,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-10-13 22:31:39,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2024-10-13 22:31:39,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 71 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:31:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2024-10-13 22:31:39,584 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 67 [2024-10-13 22:31:39,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:31:39,584 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2024-10-13 22:31:39,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.28125) internal successors, (105), 32 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:31:39,584 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2024-10-13 22:31:39,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-13 22:31:39,584 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:31:39,584 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:31:39,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0