./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/floats-nonlinear/color-magicseries1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/floats-nonlinear/color-magicseries1.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 36e10b539b0c5593d108c5ae8d5aca590fa779f1bae4b76f536932feddfdfc87 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 12:58:04,851 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 12:58:04,918 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 12:58:04,924 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 12:58:04,925 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 12:58:04,956 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 12:58:04,957 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 12:58:04,957 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 12:58:04,958 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 12:58:04,960 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 12:58:04,960 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 12:58:04,960 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 12:58:04,961 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 12:58:04,961 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 12:58:04,961 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 12:58:04,964 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 12:58:04,965 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 12:58:04,965 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 12:58:04,965 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 12:58:04,965 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 12:58:04,966 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 12:58:04,966 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 12:58:04,966 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 12:58:04,966 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 12:58:04,967 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 12:58:04,967 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 12:58:04,967 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 12:58:04,967 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 12:58:04,967 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 12:58:04,968 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 12:58:04,968 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 12:58:04,968 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 12:58:04,968 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 12:58:04,968 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 12:58:04,969 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 12:58:04,969 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 12:58:04,970 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 12:58:04,971 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 12:58:04,971 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 12:58:04,971 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 12:58:04,971 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 12:58:04,972 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 12:58:04,972 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 36e10b539b0c5593d108c5ae8d5aca590fa779f1bae4b76f536932feddfdfc87 [2024-11-18 12:58:05,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 12:58:05,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 12:58:05,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 12:58:05,230 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 12:58:05,231 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 12:58:05,232 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-nonlinear/color-magicseries1.c [2024-11-18 12:58:06,624 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 12:58:06,801 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 12:58:06,801 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-nonlinear/color-magicseries1.c [2024-11-18 12:58:06,810 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30a5af410/cdda6342eca043d78b6f8e5c2a70db10/FLAG978801ff8 [2024-11-18 12:58:06,823 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30a5af410/cdda6342eca043d78b6f8e5c2a70db10 [2024-11-18 12:58:06,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 12:58:06,827 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 12:58:06,828 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 12:58:06,829 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 12:58:06,833 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 12:58:06,834 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:58:06" (1/1) ... [2024-11-18 12:58:06,835 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30e2aaa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:58:06, skipping insertion in model container [2024-11-18 12:58:06,835 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:58:06" (1/1) ... [2024-11-18 12:58:06,851 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 12:58:07,070 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-nonlinear/color-magicseries1.c[613,626] [2024-11-18 12:58:07,094 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 12:58:07,101 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 12:58:07,113 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-nonlinear/color-magicseries1.c[613,626] [2024-11-18 12:58:07,123 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 12:58:07,138 INFO L204 MainTranslator]: Completed translation [2024-11-18 12:58:07,139 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:58:07 WrapperNode [2024-11-18 12:58:07,139 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 12:58:07,140 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 12:58:07,140 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 12:58:07,140 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 12:58:07,148 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:58:07" (1/1) ... [2024-11-18 12:58:07,158 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:58:07" (1/1) ... [2024-11-18 12:58:07,179 INFO L138 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 137 [2024-11-18 12:58:07,180 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 12:58:07,181 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 12:58:07,181 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 12:58:07,181 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 12:58:07,191 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:58:07" (1/1) ... [2024-11-18 12:58:07,191 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:58:07" (1/1) ... [2024-11-18 12:58:07,193 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:58:07" (1/1) ... [2024-11-18 12:58:07,207 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 6 initializations are split as follows [2, 4]. The 0 writes are split as follows [0, 0]. [2024-11-18 12:58:07,207 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:58:07" (1/1) ... [2024-11-18 12:58:07,207 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:58:07" (1/1) ... [2024-11-18 12:58:07,212 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:58:07" (1/1) ... [2024-11-18 12:58:07,220 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:58:07" (1/1) ... [2024-11-18 12:58:07,224 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:58:07" (1/1) ... [2024-11-18 12:58:07,226 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:58:07" (1/1) ... [2024-11-18 12:58:07,228 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 12:58:07,229 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 12:58:07,229 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 12:58:07,229 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 12:58:07,230 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:58:07" (1/1) ... [2024-11-18 12:58:07,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 12:58:07,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 12:58:07,265 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-18 12:58:07,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-18 12:58:07,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 12:58:07,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 12:58:07,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-18 12:58:07,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-18 12:58:07,331 INFO L130 BoogieDeclarations]: Found specification of procedure check_domain [2024-11-18 12:58:07,331 INFO L138 BoogieDeclarations]: Found implementation of procedure check_domain [2024-11-18 12:58:07,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 12:58:07,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 12:58:07,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-18 12:58:07,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-18 12:58:07,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-18 12:58:07,429 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 12:58:07,432 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 12:58:07,658 INFO L? ?]: Removed 43 outVars from TransFormulas that were not future-live. [2024-11-18 12:58:07,659 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 12:58:07,677 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 12:58:07,677 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-18 12:58:07,678 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:58:07 BoogieIcfgContainer [2024-11-18 12:58:07,678 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 12:58:07,680 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 12:58:07,681 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 12:58:07,684 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 12:58:07,684 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 12:58:06" (1/3) ... [2024-11-18 12:58:07,685 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ddba71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:58:07, skipping insertion in model container [2024-11-18 12:58:07,685 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:58:07" (2/3) ... [2024-11-18 12:58:07,686 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ddba71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:58:07, skipping insertion in model container [2024-11-18 12:58:07,687 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:58:07" (3/3) ... [2024-11-18 12:58:07,688 INFO L112 eAbstractionObserver]: Analyzing ICFG color-magicseries1.c [2024-11-18 12:58:07,703 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 12:58:07,705 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 12:58:07,774 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 12:58:07,783 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;@6ff0dc48, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 12:58:07,783 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 12:58:07,788 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 32 states have internal predecessors, (45), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 12:58:07,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-18 12:58:07,795 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 12:58:07,796 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 12:58:07,796 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 12:58:07,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 12:58:07,801 INFO L85 PathProgramCache]: Analyzing trace with hash -173200605, now seen corresponding path program 1 times [2024-11-18 12:58:07,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 12:58:07,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825217795] [2024-11-18 12:58:07,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 12:58:07,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 12:58:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 12:58:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 12:58:08,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 12:58:08,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825217795] [2024-11-18 12:58:08,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825217795] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 12:58:08,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 12:58:08,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-18 12:58:08,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952682847] [2024-11-18 12:58:08,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 12:58:08,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 12:58:08,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 12:58:08,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 12:58:08,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 12:58:08,179 INFO L87 Difference]: Start difference. First operand has 38 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 32 states have internal predecessors, (45), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 12:58:08,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 12:58:08,236 INFO L93 Difference]: Finished difference Result 73 states and 104 transitions. [2024-11-18 12:58:08,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 12:58:08,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-11-18 12:58:08,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 12:58:08,247 INFO L225 Difference]: With dead ends: 73 [2024-11-18 12:58:08,248 INFO L226 Difference]: Without dead ends: 38 [2024-11-18 12:58:08,250 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 12:58:08,254 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 12:58:08,254 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 179 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 12:58:08,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-18 12:58:08,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-18 12:58:08,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-18 12:58:08,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 53 transitions. [2024-11-18 12:58:08,301 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 53 transitions. Word has length 17 [2024-11-18 12:58:08,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 12:58:08,302 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 53 transitions. [2024-11-18 12:58:08,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 12:58:08,302 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 53 transitions. [2024-11-18 12:58:08,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-18 12:58:08,304 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 12:58:08,304 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 12:58:08,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 12:58:08,304 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 12:58:08,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 12:58:08,305 INFO L85 PathProgramCache]: Analyzing trace with hash -466603612, now seen corresponding path program 1 times [2024-11-18 12:58:08,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 12:58:08,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063648013] [2024-11-18 12:58:08,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 12:58:08,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 12:58:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 12:58:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 12:58:08,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 12:58:08,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063648013] [2024-11-18 12:58:08,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063648013] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 12:58:08,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 12:58:08,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-18 12:58:08,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120805514] [2024-11-18 12:58:08,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 12:58:08,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-18 12:58:08,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 12:58:08,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-18 12:58:08,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-18 12:58:08,459 INFO L87 Difference]: Start difference. First operand 38 states and 53 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 12:58:08,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 12:58:08,478 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2024-11-18 12:58:08,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 12:58:08,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-11-18 12:58:08,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 12:58:08,479 INFO L225 Difference]: With dead ends: 42 [2024-11-18 12:58:08,480 INFO L226 Difference]: Without dead ends: 38 [2024-11-18 12:58:08,480 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-18 12:58:08,482 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 12:58:08,484 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 130 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 12:58:08,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-18 12:58:08,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-18 12:58:08,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-18 12:58:08,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2024-11-18 12:58:08,497 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 17 [2024-11-18 12:58:08,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 12:58:08,497 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2024-11-18 12:58:08,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 12:58:08,498 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2024-11-18 12:58:08,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-18 12:58:08,499 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 12:58:08,499 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 12:58:08,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-18 12:58:08,500 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 12:58:08,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 12:58:08,501 INFO L85 PathProgramCache]: Analyzing trace with hash -97449680, now seen corresponding path program 1 times [2024-11-18 12:58:08,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 12:58:08,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701904666] [2024-11-18 12:58:08,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 12:58:08,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 12:58:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 12:58:08,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 12:58:08,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 12:58:08,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701904666] [2024-11-18 12:58:08,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701904666] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 12:58:08,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 12:58:08,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 12:58:08,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553494345] [2024-11-18 12:58:08,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 12:58:08,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 12:58:08,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 12:58:08,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 12:58:08,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 12:58:08,577 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 12:58:08,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 12:58:08,595 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2024-11-18 12:58:08,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 12:58:08,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-11-18 12:58:08,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 12:58:08,599 INFO L225 Difference]: With dead ends: 53 [2024-11-18 12:58:08,599 INFO L226 Difference]: Without dead ends: 38 [2024-11-18 12:58:08,599 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 12:58:08,601 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 12:58:08,601 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 12:58:08,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-18 12:58:08,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-18 12:58:08,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-18 12:58:08,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2024-11-18 12:58:08,608 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 21 [2024-11-18 12:58:08,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 12:58:08,609 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2024-11-18 12:58:08,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 12:58:08,609 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2024-11-18 12:58:08,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-18 12:58:08,610 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 12:58:08,611 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 12:58:08,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-18 12:58:08,611 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 12:58:08,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 12:58:08,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1606193460, now seen corresponding path program 1 times [2024-11-18 12:58:08,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 12:58:08,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964252387] [2024-11-18 12:58:08,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 12:58:08,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 12:58:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 12:58:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 12:58:08,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 12:58:08,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964252387] [2024-11-18 12:58:08,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964252387] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 12:58:08,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 12:58:08,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-18 12:58:08,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558919551] [2024-11-18 12:58:08,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 12:58:08,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-18 12:58:08,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 12:58:08,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-18 12:58:08,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-18 12:58:08,727 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 12:58:08,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 12:58:08,762 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2024-11-18 12:58:08,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 12:58:08,763 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2024-11-18 12:58:08,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 12:58:08,764 INFO L225 Difference]: With dead ends: 63 [2024-11-18 12:58:08,764 INFO L226 Difference]: Without dead ends: 38 [2024-11-18 12:58:08,765 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-18 12:58:08,766 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 12:58:08,766 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 12:58:08,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-18 12:58:08,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-18 12:58:08,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-18 12:58:08,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2024-11-18 12:58:08,774 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 27 [2024-11-18 12:58:08,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 12:58:08,774 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2024-11-18 12:58:08,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 12:58:08,774 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2024-11-18 12:58:08,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-18 12:58:08,775 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 12:58:08,775 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 12:58:08,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-18 12:58:08,776 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 12:58:08,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 12:58:08,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1389600499, now seen corresponding path program 1 times [2024-11-18 12:58:08,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 12:58:08,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382881503] [2024-11-18 12:58:08,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 12:58:08,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 12:58:08,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 12:58:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-18 12:58:08,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 12:58:08,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382881503] [2024-11-18 12:58:08,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382881503] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 12:58:08,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 12:58:08,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-18 12:58:08,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166581281] [2024-11-18 12:58:08,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 12:58:08,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-18 12:58:08,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 12:58:08,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-18 12:58:08,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-18 12:58:08,859 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-18 12:58:08,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 12:58:08,887 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2024-11-18 12:58:08,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 12:58:08,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-11-18 12:58:08,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 12:58:08,890 INFO L225 Difference]: With dead ends: 67 [2024-11-18 12:58:08,890 INFO L226 Difference]: Without dead ends: 38 [2024-11-18 12:58:08,891 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-18 12:58:08,892 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 12:58:08,896 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 12:58:08,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-18 12:58:08,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2024-11-18 12:58:08,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 12:58:08,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2024-11-18 12:58:08,905 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 33 [2024-11-18 12:58:08,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 12:58:08,905 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2024-11-18 12:58:08,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-18 12:58:08,905 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2024-11-18 12:58:08,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-18 12:58:08,906 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 12:58:08,906 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 12:58:08,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-18 12:58:08,906 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 12:58:08,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 12:58:08,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1645112148, now seen corresponding path program 1 times [2024-11-18 12:58:08,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 12:58:08,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063876658] [2024-11-18 12:58:08,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 12:58:08,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 12:58:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 12:58:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-18 12:58:08,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 12:58:08,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063876658] [2024-11-18 12:58:08,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063876658] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 12:58:08,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 12:58:08,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 12:58:08,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950422328] [2024-11-18 12:58:08,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 12:58:08,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 12:58:08,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 12:58:08,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 12:58:08,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 12:58:08,993 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:09,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 12:58:09,016 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2024-11-18 12:58:09,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 12:58:09,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2024-11-18 12:58:09,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 12:58:09,018 INFO L225 Difference]: With dead ends: 49 [2024-11-18 12:58:09,018 INFO L226 Difference]: Without dead ends: 42 [2024-11-18 12:58:09,020 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 12:58:09,021 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 12:58:09,021 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 68 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 12:58:09,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-18 12:58:09,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2024-11-18 12:58:09,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 12:58:09,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2024-11-18 12:58:09,028 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 39 [2024-11-18 12:58:09,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 12:58:09,028 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2024-11-18 12:58:09,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:09,029 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2024-11-18 12:58:09,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-18 12:58:09,030 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 12:58:09,031 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 12:58:09,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-18 12:58:09,031 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 12:58:09,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 12:58:09,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1930899933, now seen corresponding path program 1 times [2024-11-18 12:58:09,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 12:58:09,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717417254] [2024-11-18 12:58:09,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 12:58:09,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 12:58:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 12:58:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-18 12:58:09,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 12:58:09,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717417254] [2024-11-18 12:58:09,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717417254] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 12:58:09,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 12:58:09,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 12:58:09,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290634520] [2024-11-18 12:58:09,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 12:58:09,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 12:58:09,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 12:58:09,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 12:58:09,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 12:58:09,099 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:09,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 12:58:09,121 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2024-11-18 12:58:09,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 12:58:09,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2024-11-18 12:58:09,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 12:58:09,122 INFO L225 Difference]: With dead ends: 52 [2024-11-18 12:58:09,122 INFO L226 Difference]: Without dead ends: 38 [2024-11-18 12:58:09,122 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 12:58:09,123 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 12:58:09,123 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 73 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 12:58:09,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-18 12:58:09,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2024-11-18 12:58:09,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 12:58:09,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2024-11-18 12:58:09,130 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 41 [2024-11-18 12:58:09,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 12:58:09,131 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2024-11-18 12:58:09,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:09,131 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2024-11-18 12:58:09,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-18 12:58:09,132 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 12:58:09,132 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 12:58:09,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-18 12:58:09,133 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 12:58:09,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 12:58:09,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1158681494, now seen corresponding path program 1 times [2024-11-18 12:58:09,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 12:58:09,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442115998] [2024-11-18 12:58:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 12:58:09,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 12:58:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 12:58:09,215 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-18 12:58:09,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 12:58:09,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442115998] [2024-11-18 12:58:09,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442115998] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 12:58:09,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769542836] [2024-11-18 12:58:09,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 12:58:09,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 12:58:09,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 12:58:09,220 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 12:58:09,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 12:58:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 12:58:09,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-18 12:58:09,334 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 12:58:09,392 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-18 12:58:09,394 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 12:58:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-18 12:58:09,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769542836] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 12:58:09,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 12:58:09,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-18 12:58:09,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968559754] [2024-11-18 12:58:09,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 12:58:09,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-18 12:58:09,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 12:58:09,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-18 12:58:09,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-18 12:58:09,469 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:09,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 12:58:09,498 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2024-11-18 12:58:09,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 12:58:09,500 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2024-11-18 12:58:09,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 12:58:09,500 INFO L225 Difference]: With dead ends: 60 [2024-11-18 12:58:09,500 INFO L226 Difference]: Without dead ends: 45 [2024-11-18 12:58:09,501 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-18 12:58:09,501 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 12:58:09,502 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 109 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 12:58:09,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-18 12:58:09,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-11-18 12:58:09,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 12:58:09,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2024-11-18 12:58:09,506 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 44 [2024-11-18 12:58:09,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 12:58:09,506 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2024-11-18 12:58:09,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:09,507 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2024-11-18 12:58:09,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-18 12:58:09,508 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 12:58:09,508 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 12:58:09,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-18 12:58:09,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 12:58:09,709 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 12:58:09,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 12:58:09,710 INFO L85 PathProgramCache]: Analyzing trace with hash 60507235, now seen corresponding path program 2 times [2024-11-18 12:58:09,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 12:58:09,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634517879] [2024-11-18 12:58:09,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 12:58:09,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 12:58:09,734 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-18 12:58:09,734 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 12:58:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-18 12:58:09,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 12:58:09,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634517879] [2024-11-18 12:58:09,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634517879] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 12:58:09,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 12:58:09,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-18 12:58:09,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887427549] [2024-11-18 12:58:09,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 12:58:09,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-18 12:58:09,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 12:58:09,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-18 12:58:09,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-18 12:58:09,774 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:09,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 12:58:09,793 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2024-11-18 12:58:09,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 12:58:09,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2024-11-18 12:58:09,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 12:58:09,795 INFO L225 Difference]: With dead ends: 51 [2024-11-18 12:58:09,795 INFO L226 Difference]: Without dead ends: 45 [2024-11-18 12:58:09,796 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-18 12:58:09,797 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 12:58:09,797 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 12:58:09,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-18 12:58:09,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-11-18 12:58:09,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 12:58:09,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2024-11-18 12:58:09,807 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 53 [2024-11-18 12:58:09,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 12:58:09,807 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2024-11-18 12:58:09,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:09,807 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2024-11-18 12:58:09,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-18 12:58:09,808 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 12:58:09,808 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 12:58:09,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-18 12:58:09,808 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 12:58:09,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 12:58:09,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1306236444, now seen corresponding path program 1 times [2024-11-18 12:58:09,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 12:58:09,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278280194] [2024-11-18 12:58:09,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 12:58:09,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 12:58:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 12:58:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-18 12:58:09,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 12:58:09,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278280194] [2024-11-18 12:58:09,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278280194] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 12:58:09,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17912185] [2024-11-18 12:58:09,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 12:58:09,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 12:58:09,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 12:58:09,918 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 12:58:09,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 12:58:10,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 12:58:10,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-18 12:58:10,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 12:58:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-18 12:58:10,070 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 12:58:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-18 12:58:10,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17912185] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 12:58:10,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 12:58:10,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-18 12:58:10,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452340444] [2024-11-18 12:58:10,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 12:58:10,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-18 12:58:10,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 12:58:10,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-18 12:58:10,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-18 12:58:10,139 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:10,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 12:58:10,182 INFO L93 Difference]: Finished difference Result 103 states and 129 transitions. [2024-11-18 12:58:10,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 12:58:10,183 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 56 [2024-11-18 12:58:10,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 12:58:10,185 INFO L225 Difference]: With dead ends: 103 [2024-11-18 12:58:10,186 INFO L226 Difference]: Without dead ends: 96 [2024-11-18 12:58:10,186 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-18 12:58:10,187 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 12:58:10,187 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 105 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 12:58:10,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-18 12:58:10,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-11-18 12:58:10,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.2444444444444445) internal successors, (112), 90 states have internal predecessors, (112), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 12:58:10,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 120 transitions. [2024-11-18 12:58:10,201 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 120 transitions. Word has length 56 [2024-11-18 12:58:10,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 12:58:10,203 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 120 transitions. [2024-11-18 12:58:10,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:10,203 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 120 transitions. [2024-11-18 12:58:10,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-18 12:58:10,204 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 12:58:10,204 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 12:58:10,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-18 12:58:10,407 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,SelfDestructingSolverStorable9 [2024-11-18 12:58:10,408 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 12:58:10,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 12:58:10,408 INFO L85 PathProgramCache]: Analyzing trace with hash -632814932, now seen corresponding path program 2 times [2024-11-18 12:58:10,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 12:58:10,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726242810] [2024-11-18 12:58:10,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 12:58:10,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 12:58:10,471 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 12:58:10,472 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 12:58:11,857 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 260 proven. 70 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2024-11-18 12:58:11,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 12:58:11,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726242810] [2024-11-18 12:58:11,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726242810] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 12:58:11,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336435909] [2024-11-18 12:58:11,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 12:58:11,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 12:58:11,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 12:58:11,861 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 12:58:11,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 12:58:11,987 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 12:58:11,988 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 12:58:11,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-18 12:58:11,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 12:58:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 245 proven. 92 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-18 12:58:12,483 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 12:58:12,693 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 12:58:12,694 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 27 treesize of output 19 [2024-11-18 12:58:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 245 proven. 82 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-11-18 12:58:12,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336435909] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 12:58:12,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 12:58:12,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 12] total 39 [2024-11-18 12:58:12,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992775036] [2024-11-18 12:58:12,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 12:58:12,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-18 12:58:12,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 12:58:12,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-18 12:58:12,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1338, Unknown=0, NotChecked=0, Total=1482 [2024-11-18 12:58:12,918 INFO L87 Difference]: Start difference. First operand 96 states and 120 transitions. Second operand has 39 states, 39 states have (on average 2.923076923076923) internal successors, (114), 39 states have internal predecessors, (114), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:17,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 12:58:17,416 INFO L93 Difference]: Finished difference Result 434 states and 566 transitions. [2024-11-18 12:58:17,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2024-11-18 12:58:17,416 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.923076923076923) internal successors, (114), 39 states have internal predecessors, (114), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 107 [2024-11-18 12:58:17,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 12:58:17,419 INFO L225 Difference]: With dead ends: 434 [2024-11-18 12:58:17,419 INFO L226 Difference]: Without dead ends: 340 [2024-11-18 12:58:17,427 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6573 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2059, Invalid=17963, Unknown=0, NotChecked=0, Total=20022 [2024-11-18 12:58:17,427 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 352 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 2455 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 2470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-18 12:58:17,428 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 682 Invalid, 2470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2455 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-18 12:58:17,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2024-11-18 12:58:17,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 281. [2024-11-18 12:58:17,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 275 states have (on average 1.298181818181818) internal successors, (357), 275 states have internal predecessors, (357), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 12:58:17,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 365 transitions. [2024-11-18 12:58:17,453 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 365 transitions. Word has length 107 [2024-11-18 12:58:17,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 12:58:17,453 INFO L471 AbstractCegarLoop]: Abstraction has 281 states and 365 transitions. [2024-11-18 12:58:17,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.923076923076923) internal successors, (114), 39 states have internal predecessors, (114), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:17,454 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 365 transitions. [2024-11-18 12:58:17,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-18 12:58:17,458 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 12:58:17,458 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 12:58:17,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-18 12:58:17,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 12:58:17,663 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 12:58:17,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 12:58:17,664 INFO L85 PathProgramCache]: Analyzing trace with hash -753088018, now seen corresponding path program 1 times [2024-11-18 12:58:17,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 12:58:17,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788636713] [2024-11-18 12:58:17,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 12:58:17,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 12:58:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 12:58:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 214 proven. 178 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-18 12:58:18,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 12:58:18,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788636713] [2024-11-18 12:58:18,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788636713] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 12:58:18,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540319799] [2024-11-18 12:58:18,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 12:58:18,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 12:58:18,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 12:58:18,397 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 12:58:18,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 12:58:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 12:58:18,534 INFO L255 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-18 12:58:18,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 12:58:19,180 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 187 proven. 238 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-18 12:58:19,181 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 12:58:19,433 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 12:58:19,433 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 19 [2024-11-18 12:58:19,612 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 188 proven. 220 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-11-18 12:58:19,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540319799] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 12:58:19,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 12:58:19,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 15] total 47 [2024-11-18 12:58:19,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487698366] [2024-11-18 12:58:19,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 12:58:19,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-18 12:58:19,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 12:58:19,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-18 12:58:19,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1986, Unknown=0, NotChecked=0, Total=2162 [2024-11-18 12:58:19,616 INFO L87 Difference]: Start difference. First operand 281 states and 365 transitions. Second operand has 47 states, 47 states have (on average 3.2127659574468086) internal successors, (151), 47 states have internal predecessors, (151), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:29,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 12:58:29,375 INFO L93 Difference]: Finished difference Result 2088 states and 2741 transitions. [2024-11-18 12:58:29,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2024-11-18 12:58:29,376 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.2127659574468086) internal successors, (151), 47 states have internal predecessors, (151), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 107 [2024-11-18 12:58:29,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 12:58:29,383 INFO L225 Difference]: With dead ends: 2088 [2024-11-18 12:58:29,383 INFO L226 Difference]: Without dead ends: 1789 [2024-11-18 12:58:29,401 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 344 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50026 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=6687, Invalid=112683, Unknown=0, NotChecked=0, Total=119370 [2024-11-18 12:58:29,401 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 1184 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 4710 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 4760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 4710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-18 12:58:29,402 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1184 Valid, 952 Invalid, 4760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 4710 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-18 12:58:29,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2024-11-18 12:58:29,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1296. [2024-11-18 12:58:29,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1290 states have (on average 1.3147286821705426) internal successors, (1696), 1290 states have internal predecessors, (1696), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 12:58:29,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1704 transitions. [2024-11-18 12:58:29,497 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1704 transitions. Word has length 107 [2024-11-18 12:58:29,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 12:58:29,498 INFO L471 AbstractCegarLoop]: Abstraction has 1296 states and 1704 transitions. [2024-11-18 12:58:29,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.2127659574468086) internal successors, (151), 47 states have internal predecessors, (151), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:29,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1704 transitions. [2024-11-18 12:58:29,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-18 12:58:29,503 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 12:58:29,503 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 12:58:29,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-18 12:58:29,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 12:58:29,707 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 12:58:29,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 12:58:29,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1541662252, now seen corresponding path program 2 times [2024-11-18 12:58:29,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 12:58:29,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966709770] [2024-11-18 12:58:29,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 12:58:29,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 12:58:29,743 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 12:58:29,743 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 12:58:30,357 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 191 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-18 12:58:30,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 12:58:30,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966709770] [2024-11-18 12:58:30,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966709770] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 12:58:30,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375506869] [2024-11-18 12:58:30,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 12:58:30,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 12:58:30,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 12:58:30,359 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 12:58:30,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 12:58:30,454 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 12:58:30,454 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 12:58:30,455 INFO L255 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-18 12:58:30,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 12:58:30,723 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 202 proven. 32 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2024-11-18 12:58:30,724 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 12:58:30,828 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 12:58:30,828 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 23 treesize of output 19 [2024-11-18 12:58:30,994 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 202 proven. 32 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2024-11-18 12:58:30,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375506869] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 12:58:30,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 12:58:30,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 38 [2024-11-18 12:58:30,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502539702] [2024-11-18 12:58:30,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 12:58:30,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-18 12:58:30,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 12:58:30,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-18 12:58:30,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2024-11-18 12:58:30,997 INFO L87 Difference]: Start difference. First operand 1296 states and 1704 transitions. Second operand has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:33,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 12:58:33,299 INFO L93 Difference]: Finished difference Result 3976 states and 5260 transitions. [2024-11-18 12:58:33,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-11-18 12:58:33,300 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 107 [2024-11-18 12:58:33,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 12:58:33,312 INFO L225 Difference]: With dead ends: 3976 [2024-11-18 12:58:33,312 INFO L226 Difference]: Without dead ends: 2859 [2024-11-18 12:58:33,317 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4625 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1437, Invalid=12843, Unknown=0, NotChecked=0, Total=14280 [2024-11-18 12:58:33,319 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 378 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1770 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 1779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-18 12:58:33,320 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 627 Invalid, 1779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1770 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-18 12:58:33,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2024-11-18 12:58:33,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 1885. [2024-11-18 12:58:33,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1879 states have (on average 1.3182543906333155) internal successors, (2477), 1879 states have internal predecessors, (2477), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 12:58:33,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 2485 transitions. [2024-11-18 12:58:33,515 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 2485 transitions. Word has length 107 [2024-11-18 12:58:33,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 12:58:33,515 INFO L471 AbstractCegarLoop]: Abstraction has 1885 states and 2485 transitions. [2024-11-18 12:58:33,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:33,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 2485 transitions. [2024-11-18 12:58:33,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-18 12:58:33,522 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 12:58:33,522 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 9, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 12:58:33,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-18 12:58:33,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-18 12:58:33,723 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 12:58:33,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 12:58:33,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1086665966, now seen corresponding path program 3 times [2024-11-18 12:58:33,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 12:58:33,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777431531] [2024-11-18 12:58:33,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 12:58:33,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 12:58:33,781 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-18 12:58:33,782 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 12:58:34,547 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 2 proven. 235 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2024-11-18 12:58:34,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 12:58:34,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777431531] [2024-11-18 12:58:34,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777431531] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 12:58:34,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924588775] [2024-11-18 12:58:34,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 12:58:34,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 12:58:34,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 12:58:34,549 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 12:58:34,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-18 12:58:34,643 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-18 12:58:34,644 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 12:58:34,645 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-18 12:58:34,647 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 12:58:34,890 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 12:58:34,890 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 17 treesize of output 15 [2024-11-18 12:58:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2024-11-18 12:58:35,066 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 12:58:35,244 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 12:58:35,245 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 21 treesize of output 15 [2024-11-18 12:58:35,315 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 11 proven. 209 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2024-11-18 12:58:35,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924588775] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 12:58:35,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 12:58:35,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 14] total 38 [2024-11-18 12:58:35,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767078513] [2024-11-18 12:58:35,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 12:58:35,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-18 12:58:35,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 12:58:35,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-18 12:58:35,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1117, Unknown=0, NotChecked=0, Total=1406 [2024-11-18 12:58:35,318 INFO L87 Difference]: Start difference. First operand 1885 states and 2485 transitions. Second operand has 38 states, 38 states have (on average 2.736842105263158) internal successors, (104), 38 states have internal predecessors, (104), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:40,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 12:58:40,523 INFO L93 Difference]: Finished difference Result 15769 states and 20952 transitions. [2024-11-18 12:58:40,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2024-11-18 12:58:40,524 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.736842105263158) internal successors, (104), 38 states have internal predecessors, (104), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 107 [2024-11-18 12:58:40,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 12:58:40,578 INFO L225 Difference]: With dead ends: 15769 [2024-11-18 12:58:40,579 INFO L226 Difference]: Without dead ends: 15762 [2024-11-18 12:58:40,586 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17446 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=8272, Invalid=32330, Unknown=0, NotChecked=0, Total=40602 [2024-11-18 12:58:40,587 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 999 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 12:58:40,587 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [999 Valid, 455 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 12:58:40,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15762 states. [2024-11-18 12:58:41,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15762 to 11062. [2024-11-18 12:58:41,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11062 states, 11056 states have (on average 1.371472503617945) internal successors, (15163), 11056 states have internal predecessors, (15163), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 12:58:41,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11062 states to 11062 states and 15171 transitions. [2024-11-18 12:58:41,781 INFO L78 Accepts]: Start accepts. Automaton has 11062 states and 15171 transitions. Word has length 107 [2024-11-18 12:58:41,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 12:58:41,782 INFO L471 AbstractCegarLoop]: Abstraction has 11062 states and 15171 transitions. [2024-11-18 12:58:41,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.736842105263158) internal successors, (104), 38 states have internal predecessors, (104), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:41,782 INFO L276 IsEmpty]: Start isEmpty. Operand 11062 states and 15171 transitions. [2024-11-18 12:58:41,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-18 12:58:41,803 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 12:58:41,804 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 9, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 12:58:41,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-18 12:58:42,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 12:58:42,005 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 12:58:42,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 12:58:42,005 INFO L85 PathProgramCache]: Analyzing trace with hash -480357330, now seen corresponding path program 4 times [2024-11-18 12:58:42,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 12:58:42,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920848862] [2024-11-18 12:58:42,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 12:58:42,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 12:58:42,029 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 12:58:42,029 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 12:58:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 235 proven. 63 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-11-18 12:58:42,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 12:58:42,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920848862] [2024-11-18 12:58:42,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920848862] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 12:58:42,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119571546] [2024-11-18 12:58:42,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 12:58:42,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 12:58:42,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 12:58:42,396 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 12:58:42,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-18 12:58:42,504 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 12:58:42,505 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 12:58:42,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-18 12:58:42,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 12:58:42,714 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 [2024-11-18 12:58:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 254 proven. 43 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2024-11-18 12:58:42,731 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 12:58:42,865 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-18 12:58:42,865 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 19 treesize of output 9 [2024-11-18 12:58:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 235 proven. 62 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2024-11-18 12:58:42,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119571546] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 12:58:42,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 12:58:42,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 28 [2024-11-18 12:58:42,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917649009] [2024-11-18 12:58:42,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 12:58:42,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-18 12:58:42,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 12:58:42,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-18 12:58:42,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2024-11-18 12:58:42,886 INFO L87 Difference]: Start difference. First operand 11062 states and 15171 transitions. Second operand has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:44,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 12:58:44,631 INFO L93 Difference]: Finished difference Result 27890 states and 38503 transitions. [2024-11-18 12:58:44,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-18 12:58:44,632 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 107 [2024-11-18 12:58:44,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 12:58:44,692 INFO L225 Difference]: With dead ends: 27890 [2024-11-18 12:58:44,693 INFO L226 Difference]: Without dead ends: 17653 [2024-11-18 12:58:44,712 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 198 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=281, Invalid=1881, Unknown=0, NotChecked=0, Total=2162 [2024-11-18 12:58:44,713 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 55 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 12:58:44,713 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 540 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 12:58:44,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17653 states. [2024-11-18 12:58:46,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17653 to 13335. [2024-11-18 12:58:46,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13335 states, 13329 states have (on average 1.3541901117863306) internal successors, (18050), 13329 states have internal predecessors, (18050), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 12:58:46,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13335 states to 13335 states and 18058 transitions. [2024-11-18 12:58:46,310 INFO L78 Accepts]: Start accepts. Automaton has 13335 states and 18058 transitions. Word has length 107 [2024-11-18 12:58:46,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 12:58:46,311 INFO L471 AbstractCegarLoop]: Abstraction has 13335 states and 18058 transitions. [2024-11-18 12:58:46,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:46,311 INFO L276 IsEmpty]: Start isEmpty. Operand 13335 states and 18058 transitions. [2024-11-18 12:58:46,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-18 12:58:46,338 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 12:58:46,338 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 12:58:46,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-18 12:58:46,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 12:58:46,543 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 12:58:46,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 12:58:46,543 INFO L85 PathProgramCache]: Analyzing trace with hash -2054892500, now seen corresponding path program 5 times [2024-11-18 12:58:46,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 12:58:46,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684828927] [2024-11-18 12:58:46,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 12:58:46,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 12:58:46,605 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2024-11-18 12:58:46,605 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 12:58:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 286 proven. 128 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-11-18 12:58:47,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 12:58:47,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684828927] [2024-11-18 12:58:47,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684828927] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 12:58:47,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869954193] [2024-11-18 12:58:47,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 12:58:47,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 12:58:47,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 12:58:47,445 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 12:58:47,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-18 12:58:47,559 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2024-11-18 12:58:47,560 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 12:58:47,561 INFO L255 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-18 12:58:47,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 12:58:47,763 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 181 proven. 22 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2024-11-18 12:58:47,764 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 12:58:47,908 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 12:58:47,908 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 27 treesize of output 19 [2024-11-18 12:58:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 181 proven. 22 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2024-11-18 12:58:47,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869954193] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 12:58:47,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 12:58:47,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 36 [2024-11-18 12:58:47,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522126777] [2024-11-18 12:58:47,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 12:58:47,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-18 12:58:47,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 12:58:47,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-18 12:58:47,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2024-11-18 12:58:47,957 INFO L87 Difference]: Start difference. First operand 13335 states and 18058 transitions. Second operand has 36 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 36 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:51,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 12:58:51,102 INFO L93 Difference]: Finished difference Result 25366 states and 34666 transitions. [2024-11-18 12:58:51,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-11-18 12:58:51,102 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 36 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 107 [2024-11-18 12:58:51,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 12:58:51,122 INFO L225 Difference]: With dead ends: 25366 [2024-11-18 12:58:51,122 INFO L226 Difference]: Without dead ends: 4218 [2024-11-18 12:58:51,149 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2601 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1180, Invalid=8132, Unknown=0, NotChecked=0, Total=9312 [2024-11-18 12:58:51,150 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 153 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 2687 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 2704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-18 12:58:51,151 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 789 Invalid, 2704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2687 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-18 12:58:51,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4218 states. [2024-11-18 12:58:51,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4218 to 1757. [2024-11-18 12:58:51,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1757 states, 1751 states have (on average 1.249571673329526) internal successors, (2188), 1751 states have internal predecessors, (2188), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 12:58:51,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1757 states to 1757 states and 2196 transitions. [2024-11-18 12:58:51,529 INFO L78 Accepts]: Start accepts. Automaton has 1757 states and 2196 transitions. Word has length 107 [2024-11-18 12:58:51,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 12:58:51,530 INFO L471 AbstractCegarLoop]: Abstraction has 1757 states and 2196 transitions. [2024-11-18 12:58:51,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 36 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:51,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1757 states and 2196 transitions. [2024-11-18 12:58:51,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-18 12:58:51,537 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 12:58:51,537 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 11, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 12:58:51,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-18 12:58:51,738 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,SelfDestructingSolverStorable15 [2024-11-18 12:58:51,738 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 12:58:51,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 12:58:51,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1955544686, now seen corresponding path program 6 times [2024-11-18 12:58:51,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 12:58:51,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713388250] [2024-11-18 12:58:51,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 12:58:51,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 12:58:51,796 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-11-18 12:58:51,796 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 12:58:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 61 proven. 337 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-18 12:58:52,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 12:58:52,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713388250] [2024-11-18 12:58:52,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713388250] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 12:58:52,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687336208] [2024-11-18 12:58:52,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 12:58:52,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 12:58:52,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 12:58:52,560 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 12:58:52,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-18 12:58:52,706 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-11-18 12:58:52,707 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 12:58:52,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-18 12:58:52,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 12:58:52,943 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 12:58:52,943 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 17 treesize of output 15 [2024-11-18 12:58:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 395 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-11-18 12:58:53,144 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 12:58:53,373 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 12:58:53,374 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 19 treesize of output 15 [2024-11-18 12:58:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 3 proven. 392 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-11-18 12:58:53,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687336208] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 12:58:53,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 12:58:53,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 37 [2024-11-18 12:58:53,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756885316] [2024-11-18 12:58:53,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 12:58:53,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-18 12:58:53,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 12:58:53,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-18 12:58:53,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2024-11-18 12:58:53,500 INFO L87 Difference]: Start difference. First operand 1757 states and 2196 transitions. Second operand has 37 states, 37 states have (on average 3.7027027027027026) internal successors, (137), 37 states have internal predecessors, (137), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:55,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 12:58:55,672 INFO L93 Difference]: Finished difference Result 2527 states and 3208 transitions. [2024-11-18 12:58:55,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-11-18 12:58:55,673 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.7027027027027026) internal successors, (137), 37 states have internal predecessors, (137), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 107 [2024-11-18 12:58:55,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 12:58:55,680 INFO L225 Difference]: With dead ends: 2527 [2024-11-18 12:58:55,680 INFO L226 Difference]: Without dead ends: 2350 [2024-11-18 12:58:55,684 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 196 SyntacticMatches, 3 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3781 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2627, Invalid=9363, Unknown=0, NotChecked=0, Total=11990 [2024-11-18 12:58:55,684 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 186 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 12:58:55,684 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 419 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 12:58:55,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2024-11-18 12:58:55,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1906. [2024-11-18 12:58:55,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1900 states have (on average 1.2563157894736843) internal successors, (2387), 1900 states have internal predecessors, (2387), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 12:58:55,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 2395 transitions. [2024-11-18 12:58:55,994 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 2395 transitions. Word has length 107 [2024-11-18 12:58:55,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 12:58:55,995 INFO L471 AbstractCegarLoop]: Abstraction has 1906 states and 2395 transitions. [2024-11-18 12:58:55,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.7027027027027026) internal successors, (137), 37 states have internal predecessors, (137), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:55,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 2395 transitions. [2024-11-18 12:58:56,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-18 12:58:56,000 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 12:58:56,001 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 12:58:56,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-18 12:58:56,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-18 12:58:56,205 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 12:58:56,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 12:58:56,205 INFO L85 PathProgramCache]: Analyzing trace with hash -2120567892, now seen corresponding path program 7 times [2024-11-18 12:58:56,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 12:58:56,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445270503] [2024-11-18 12:58:56,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 12:58:56,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 12:58:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 12:58:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 247 proven. 98 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2024-11-18 12:58:56,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 12:58:56,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445270503] [2024-11-18 12:58:56,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445270503] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 12:58:56,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674069112] [2024-11-18 12:58:56,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 12:58:56,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 12:58:56,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 12:58:56,787 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 12:58:56,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-18 12:58:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 12:58:56,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-18 12:58:56,913 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 12:58:57,307 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 [2024-11-18 12:58:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 194 proven. 201 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-11-18 12:58:57,327 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 12:58:57,498 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 12:58:57,499 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 24 treesize of output 17 [2024-11-18 12:58:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 195 proven. 200 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-11-18 12:58:57,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674069112] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 12:58:57,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 12:58:57,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2024-11-18 12:58:57,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136768865] [2024-11-18 12:58:57,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 12:58:57,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-18 12:58:57,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 12:58:57,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-18 12:58:57,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2024-11-18 12:58:57,610 INFO L87 Difference]: Start difference. First operand 1906 states and 2395 transitions. Second operand has 34 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 34 states have internal predecessors, (124), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:58,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 12:58:58,652 INFO L93 Difference]: Finished difference Result 2356 states and 2970 transitions. [2024-11-18 12:58:58,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-18 12:58:58,653 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 34 states have internal predecessors, (124), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 107 [2024-11-18 12:58:58,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 12:58:58,660 INFO L225 Difference]: With dead ends: 2356 [2024-11-18 12:58:58,660 INFO L226 Difference]: Without dead ends: 1872 [2024-11-18 12:58:58,662 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=348, Invalid=2958, Unknown=0, NotChecked=0, Total=3306 [2024-11-18 12:58:58,662 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 76 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 12:58:58,662 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 728 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 12:58:58,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2024-11-18 12:58:58,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1798. [2024-11-18 12:58:58,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1792 states have (on average 1.2511160714285714) internal successors, (2242), 1792 states have internal predecessors, (2242), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 12:58:58,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 2250 transitions. [2024-11-18 12:58:58,954 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 2250 transitions. Word has length 107 [2024-11-18 12:58:58,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 12:58:58,955 INFO L471 AbstractCegarLoop]: Abstraction has 1798 states and 2250 transitions. [2024-11-18 12:58:58,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 34 states have internal predecessors, (124), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:58:58,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 2250 transitions. [2024-11-18 12:58:58,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-18 12:58:58,959 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 12:58:58,959 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 12:58:58,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-18 12:58:59,160 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,SelfDestructingSolverStorable17 [2024-11-18 12:58:59,160 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 12:58:59,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 12:58:59,161 INFO L85 PathProgramCache]: Analyzing trace with hash 110177520, now seen corresponding path program 8 times [2024-11-18 12:58:59,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 12:58:59,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065158016] [2024-11-18 12:58:59,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 12:58:59,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 12:58:59,187 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 12:58:59,188 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 12:58:59,657 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 12 proven. 387 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-18 12:58:59,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 12:58:59,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065158016] [2024-11-18 12:58:59,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065158016] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 12:58:59,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156254760] [2024-11-18 12:58:59,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 12:58:59,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 12:58:59,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 12:58:59,661 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 12:58:59,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-18 12:58:59,786 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 12:58:59,786 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 12:58:59,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-18 12:58:59,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 12:59:00,209 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 [2024-11-18 12:59:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 14 proven. 385 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-18 12:59:00,231 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 12:59:00,436 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 12:59:00,437 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 24 treesize of output 17 [2024-11-18 12:59:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 14 proven. 385 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-18 12:59:00,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156254760] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 12:59:00,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 12:59:00,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 39 [2024-11-18 12:59:00,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427828285] [2024-11-18 12:59:00,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 12:59:00,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-18 12:59:00,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 12:59:00,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-18 12:59:00,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1343, Unknown=0, NotChecked=0, Total=1482 [2024-11-18 12:59:00,561 INFO L87 Difference]: Start difference. First operand 1798 states and 2250 transitions. Second operand has 39 states, 39 states have (on average 3.769230769230769) internal successors, (147), 39 states have internal predecessors, (147), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:59:01,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 12:59:01,250 INFO L93 Difference]: Finished difference Result 2063 states and 2597 transitions. [2024-11-18 12:59:01,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-18 12:59:01,250 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.769230769230769) internal successors, (147), 39 states have internal predecessors, (147), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 107 [2024-11-18 12:59:01,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 12:59:01,257 INFO L225 Difference]: With dead ends: 2063 [2024-11-18 12:59:01,258 INFO L226 Difference]: Without dead ends: 1817 [2024-11-18 12:59:01,259 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=1773, Unknown=0, NotChecked=0, Total=1980 [2024-11-18 12:59:01,259 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 39 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 12:59:01,260 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 708 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 12:59:01,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2024-11-18 12:59:01,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1465. [2024-11-18 12:59:01,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1459 states have (on average 1.2501713502398903) internal successors, (1824), 1459 states have internal predecessors, (1824), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 12:59:01,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 1832 transitions. [2024-11-18 12:59:01,508 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 1832 transitions. Word has length 107 [2024-11-18 12:59:01,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 12:59:01,509 INFO L471 AbstractCegarLoop]: Abstraction has 1465 states and 1832 transitions. [2024-11-18 12:59:01,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.769230769230769) internal successors, (147), 39 states have internal predecessors, (147), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:59:01,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 1832 transitions. [2024-11-18 12:59:01,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-18 12:59:01,512 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 12:59:01,512 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 12:59:01,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-18 12:59:01,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 12:59:01,713 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 12:59:01,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 12:59:01,713 INFO L85 PathProgramCache]: Analyzing trace with hash 329032238, now seen corresponding path program 9 times [2024-11-18 12:59:01,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 12:59:01,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676208248] [2024-11-18 12:59:01,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 12:59:01,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 12:59:01,769 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-18 12:59:01,769 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 12:59:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2024-11-18 12:59:02,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 12:59:02,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676208248] [2024-11-18 12:59:02,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676208248] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 12:59:02,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532519428] [2024-11-18 12:59:02,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 12:59:02,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 12:59:02,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 12:59:02,314 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 12:59:02,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-18 12:59:02,449 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-18 12:59:02,449 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 12:59:02,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-18 12:59:02,454 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 12:59:02,734 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 12:59:02,735 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 17 treesize of output 15 [2024-11-18 12:59:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 86 proven. 328 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-11-18 12:59:02,837 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 12:59:03,219 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 12:59:03,220 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 38 treesize of output 30 [2024-11-18 12:59:03,427 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 196 proven. 216 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-18 12:59:03,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532519428] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 12:59:03,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 12:59:03,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 20] total 45 [2024-11-18 12:59:03,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758378452] [2024-11-18 12:59:03,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 12:59:03,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-18 12:59:03,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 12:59:03,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-18 12:59:03,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1665, Unknown=0, NotChecked=0, Total=1980 [2024-11-18 12:59:03,430 INFO L87 Difference]: Start difference. First operand 1465 states and 1832 transitions. Second operand has 45 states, 45 states have (on average 3.088888888888889) internal successors, (139), 45 states have internal predecessors, (139), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:59:05,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 12:59:05,212 INFO L93 Difference]: Finished difference Result 1576 states and 1949 transitions. [2024-11-18 12:59:05,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-18 12:59:05,212 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.088888888888889) internal successors, (139), 45 states have internal predecessors, (139), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 107 [2024-11-18 12:59:05,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 12:59:05,217 INFO L225 Difference]: With dead ends: 1576 [2024-11-18 12:59:05,217 INFO L226 Difference]: Without dead ends: 1506 [2024-11-18 12:59:05,219 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2845 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1786, Invalid=7334, Unknown=0, NotChecked=0, Total=9120 [2024-11-18 12:59:05,220 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 288 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 12:59:05,220 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 629 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 12:59:05,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2024-11-18 12:59:05,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1454. [2024-11-18 12:59:05,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1448 states have (on average 1.2513812154696133) internal successors, (1812), 1448 states have internal predecessors, (1812), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 12:59:05,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 1820 transitions. [2024-11-18 12:59:05,486 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 1820 transitions. Word has length 107 [2024-11-18 12:59:05,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 12:59:05,486 INFO L471 AbstractCegarLoop]: Abstraction has 1454 states and 1820 transitions. [2024-11-18 12:59:05,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.088888888888889) internal successors, (139), 45 states have internal predecessors, (139), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:59:05,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 1820 transitions. [2024-11-18 12:59:05,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-18 12:59:05,489 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 12:59:05,489 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 11, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 12:59:05,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-18 12:59:05,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 12:59:05,694 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 12:59:05,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 12:59:05,694 INFO L85 PathProgramCache]: Analyzing trace with hash 995679018, now seen corresponding path program 10 times [2024-11-18 12:59:05,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 12:59:05,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075607015] [2024-11-18 12:59:05,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 12:59:05,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 12:59:05,710 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 12:59:05,710 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 12:59:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 82 proven. 343 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-18 12:59:06,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 12:59:06,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075607015] [2024-11-18 12:59:06,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075607015] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 12:59:06,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036659422] [2024-11-18 12:59:06,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 12:59:06,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 12:59:06,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 12:59:06,230 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 12:59:06,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-18 12:59:06,334 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 12:59:06,335 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 12:59:06,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-18 12:59:06,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 12:59:06,570 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 [2024-11-18 12:59:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 191 proven. 234 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-18 12:59:06,588 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 12:59:06,789 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-18 12:59:06,789 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 19 treesize of output 9 [2024-11-18 12:59:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 232 proven. 181 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-18 12:59:06,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036659422] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 12:59:06,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 12:59:06,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 15] total 37 [2024-11-18 12:59:06,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528282] [2024-11-18 12:59:06,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 12:59:06,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-18 12:59:06,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 12:59:06,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-18 12:59:06,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1207, Unknown=0, NotChecked=0, Total=1332 [2024-11-18 12:59:06,826 INFO L87 Difference]: Start difference. First operand 1454 states and 1820 transitions. Second operand has 37 states, 37 states have (on average 3.5945945945945947) internal successors, (133), 37 states have internal predecessors, (133), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:59:08,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 12:59:08,362 INFO L93 Difference]: Finished difference Result 3197 states and 4083 transitions. [2024-11-18 12:59:08,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-18 12:59:08,363 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.5945945945945947) internal successors, (133), 37 states have internal predecessors, (133), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 107 [2024-11-18 12:59:08,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 12:59:08,372 INFO L225 Difference]: With dead ends: 3197 [2024-11-18 12:59:08,373 INFO L226 Difference]: Without dead ends: 2620 [2024-11-18 12:59:08,376 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 198 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=748, Invalid=5414, Unknown=0, NotChecked=0, Total=6162 [2024-11-18 12:59:08,377 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 101 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-18 12:59:08,377 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 628 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1297 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-18 12:59:08,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2620 states. [2024-11-18 12:59:08,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2620 to 1746. [2024-11-18 12:59:08,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1740 states have (on average 1.2448275862068965) internal successors, (2166), 1740 states have internal predecessors, (2166), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 12:59:08,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 2174 transitions. [2024-11-18 12:59:08,674 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 2174 transitions. Word has length 107 [2024-11-18 12:59:08,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 12:59:08,675 INFO L471 AbstractCegarLoop]: Abstraction has 1746 states and 2174 transitions. [2024-11-18 12:59:08,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.5945945945945947) internal successors, (133), 37 states have internal predecessors, (133), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:59:08,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 2174 transitions. [2024-11-18 12:59:08,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-18 12:59:08,677 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 12:59:08,677 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 12:59:08,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-18 12:59:08,878 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,SelfDestructingSolverStorable20 [2024-11-18 12:59:08,878 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 12:59:08,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 12:59:08,878 INFO L85 PathProgramCache]: Analyzing trace with hash 408873004, now seen corresponding path program 11 times [2024-11-18 12:59:08,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 12:59:08,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604825787] [2024-11-18 12:59:08,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 12:59:08,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 12:59:08,914 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2024-11-18 12:59:08,914 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 12:59:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 11 proven. 388 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-18 12:59:09,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 12:59:09,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604825787] [2024-11-18 12:59:09,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604825787] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 12:59:09,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484125486] [2024-11-18 12:59:09,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 12:59:09,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 12:59:09,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 12:59:09,481 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 12:59:09,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-18 12:59:09,598 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2024-11-18 12:59:09,598 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 12:59:09,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-18 12:59:09,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 12:59:10,138 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 12:59:10,139 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 25 treesize of output 19 [2024-11-18 12:59:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 257 proven. 81 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-18 12:59:10,170 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 12:59:10,516 INFO L349 Elim1Store]: treesize reduction 5, result has 81.5 percent of original size [2024-11-18 12:59:10,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 37 treesize of output 35 [2024-11-18 12:59:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 257 proven. 81 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-18 12:59:10,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484125486] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 12:59:10,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 12:59:10,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 12] total 36 [2024-11-18 12:59:10,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124738854] [2024-11-18 12:59:10,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 12:59:10,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-18 12:59:10,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 12:59:10,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-18 12:59:10,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2024-11-18 12:59:10,543 INFO L87 Difference]: Start difference. First operand 1746 states and 2174 transitions. Second operand has 36 states, 36 states have (on average 3.361111111111111) internal successors, (121), 36 states have internal predecessors, (121), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:59:11,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 12:59:11,725 INFO L93 Difference]: Finished difference Result 2818 states and 3531 transitions. [2024-11-18 12:59:11,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-18 12:59:11,726 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.361111111111111) internal successors, (121), 36 states have internal predecessors, (121), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 107 [2024-11-18 12:59:11,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 12:59:11,733 INFO L225 Difference]: With dead ends: 2818 [2024-11-18 12:59:11,733 INFO L226 Difference]: Without dead ends: 1742 [2024-11-18 12:59:11,736 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=394, Invalid=2686, Unknown=0, NotChecked=0, Total=3080 [2024-11-18 12:59:11,736 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 101 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 12:59:11,736 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 719 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 12:59:11,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2024-11-18 12:59:12,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1517. [2024-11-18 12:59:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1511 states have (on average 1.2369291859695566) internal successors, (1869), 1511 states have internal predecessors, (1869), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 12:59:12,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 1877 transitions. [2024-11-18 12:59:12,058 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 1877 transitions. Word has length 107 [2024-11-18 12:59:12,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 12:59:12,059 INFO L471 AbstractCegarLoop]: Abstraction has 1517 states and 1877 transitions. [2024-11-18 12:59:12,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.361111111111111) internal successors, (121), 36 states have internal predecessors, (121), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 12:59:12,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 1877 transitions. [2024-11-18 12:59:12,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-18 12:59:12,061 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 12:59:12,061 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 12:59:12,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-18 12:59:12,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 12:59:12,261 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 12:59:12,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 12:59:12,262 INFO L85 PathProgramCache]: Analyzing trace with hash 642590636, now seen corresponding path program 12 times [2024-11-18 12:59:12,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 12:59:12,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258010833] [2024-11-18 12:59:12,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 12:59:12,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 12:59:12,320 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2024-11-18 12:59:12,320 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 12:59:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 73 proven. 370 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-18 12:59:14,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 12:59:14,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258010833] [2024-11-18 12:59:14,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258010833] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 12:59:14,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223242431] [2024-11-18 12:59:14,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 12:59:14,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 12:59:14,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 12:59:14,348 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 12:59:14,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-18 12:59:14,470 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2024-11-18 12:59:14,470 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 12:59:14,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-18 12:59:14,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 12:59:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 7 proven. 389 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2024-11-18 12:59:15,293 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 12:59:16,032 INFO L349 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2024-11-18 12:59:16,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 51 [2024-11-18 12:59:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 9 proven. 387 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2024-11-18 12:59:16,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223242431] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 12:59:16,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 12:59:16,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 21, 21] total 75 [2024-11-18 12:59:16,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415481732] [2024-11-18 12:59:16,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 12:59:16,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-11-18 12:59:16,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 12:59:16,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-11-18 12:59:16,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=681, Invalid=4869, Unknown=0, NotChecked=0, Total=5550 [2024-11-18 12:59:16,467 INFO L87 Difference]: Start difference. First operand 1517 states and 1877 transitions. Second operand has 75 states, 75 states have (on average 2.3866666666666667) internal successors, (179), 75 states have internal predecessors, (179), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8)