./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr3.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 73efddcda095c52d9900d13088d1ec70520de6007541f46343a568e878cf2ed4 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-10 22:01:45,526 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-10 22:01:45,591 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-10 22:01:45,597 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-10 22:01:45,598 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-10 22:01:45,626 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-10 22:01:45,626 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-10 22:01:45,627 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-10 22:01:45,627 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-10 22:01:45,628 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-10 22:01:45,628 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-10 22:01:45,629 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-10 22:01:45,629 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-10 22:01:45,633 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-10 22:01:45,633 INFO L153 SettingsManager]: * Use SBE=true [2024-10-10 22:01:45,634 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-10 22:01:45,634 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-10 22:01:45,634 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-10 22:01:45,634 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-10 22:01:45,635 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-10 22:01:45,635 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-10 22:01:45,637 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-10 22:01:45,637 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-10 22:01:45,638 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-10 22:01:45,638 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-10 22:01:45,638 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-10 22:01:45,638 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-10 22:01:45,639 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-10 22:01:45,639 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-10 22:01:45,639 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-10 22:01:45,639 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-10 22:01:45,639 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-10 22:01:45,640 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:01:45,640 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-10 22:01:45,640 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-10 22:01:45,640 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-10 22:01:45,641 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-10 22:01:45,641 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-10 22:01:45,642 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-10 22:01:45,643 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-10 22:01:45,643 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-10 22:01:45,644 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-10 22:01:45,644 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73efddcda095c52d9900d13088d1ec70520de6007541f46343a568e878cf2ed4 [2024-10-10 22:01:45,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-10 22:01:45,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-10 22:01:45,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-10 22:01:45,971 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-10 22:01:45,971 INFO L274 PluginConnector]: CDTParser initialized [2024-10-10 22:01:45,972 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr3.c [2024-10-10 22:01:47,389 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-10 22:01:47,581 INFO L384 CDTParser]: Found 1 translation units. [2024-10-10 22:01:47,582 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr3.c [2024-10-10 22:01:47,591 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/bb1bf74dd/bcc32b2468dc4307a5aba05f06c4298a/FLAGcaeb2cf38 [2024-10-10 22:01:47,610 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/bb1bf74dd/bcc32b2468dc4307a5aba05f06c4298a [2024-10-10 22:01:47,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-10 22:01:47,616 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-10 22:01:47,619 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-10 22:01:47,620 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-10 22:01:47,626 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-10 22:01:47,627 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:01:47" (1/1) ... [2024-10-10 22:01:47,628 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@373cac80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:47, skipping insertion in model container [2024-10-10 22:01:47,630 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:01:47" (1/1) ... [2024-10-10 22:01:47,651 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-10 22:01:47,829 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr3.c[394,407] [2024-10-10 22:01:47,858 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:01:47,870 INFO L200 MainTranslator]: Completed pre-run [2024-10-10 22:01:47,884 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr3.c[394,407] [2024-10-10 22:01:47,900 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:01:47,922 INFO L204 MainTranslator]: Completed translation [2024-10-10 22:01:47,922 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:47 WrapperNode [2024-10-10 22:01:47,922 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-10 22:01:47,923 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-10 22:01:47,924 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-10 22:01:47,924 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-10 22:01:47,931 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:47" (1/1) ... [2024-10-10 22:01:47,942 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:47" (1/1) ... [2024-10-10 22:01:47,967 INFO L138 Inliner]: procedures = 15, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 80 [2024-10-10 22:01:47,969 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-10 22:01:47,970 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-10 22:01:47,970 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-10 22:01:47,970 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-10 22:01:47,982 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:47" (1/1) ... [2024-10-10 22:01:47,984 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:47" (1/1) ... [2024-10-10 22:01:47,985 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:47" (1/1) ... [2024-10-10 22:01:47,999 INFO L175 MemorySlicer]: Split 16 memory accesses to 3 slices as follows [2, 6, 8]. 50 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 6, 0]. The 6 writes are split as follows [0, 0, 6]. [2024-10-10 22:01:47,999 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:47" (1/1) ... [2024-10-10 22:01:48,000 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:47" (1/1) ... [2024-10-10 22:01:48,006 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:47" (1/1) ... [2024-10-10 22:01:48,013 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:47" (1/1) ... [2024-10-10 22:01:48,015 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:47" (1/1) ... [2024-10-10 22:01:48,015 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:47" (1/1) ... [2024-10-10 22:01:48,018 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-10 22:01:48,020 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-10 22:01:48,020 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-10 22:01:48,021 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-10 22:01:48,021 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:47" (1/1) ... [2024-10-10 22:01:48,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:01:48,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:01:48,059 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-10 22:01:48,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-10 22:01:48,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-10 22:01:48,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-10 22:01:48,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-10 22:01:48,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-10 22:01:48,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-10 22:01:48,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-10 22:01:48,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-10 22:01:48,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-10 22:01:48,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-10 22:01:48,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-10 22:01:48,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-10 22:01:48,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-10 22:01:48,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-10 22:01:48,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-10 22:01:48,259 INFO L238 CfgBuilder]: Building ICFG [2024-10-10 22:01:48,262 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-10 22:01:48,444 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-10-10 22:01:48,445 INFO L287 CfgBuilder]: Performing block encoding [2024-10-10 22:01:48,472 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-10 22:01:48,473 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-10 22:01:48,474 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:01:48 BoogieIcfgContainer [2024-10-10 22:01:48,474 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-10 22:01:48,476 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-10 22:01:48,477 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-10 22:01:48,481 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-10 22:01:48,481 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.10 10:01:47" (1/3) ... [2024-10-10 22:01:48,482 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11297da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:01:48, skipping insertion in model container [2024-10-10 22:01:48,482 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:01:47" (2/3) ... [2024-10-10 22:01:48,483 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11297da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:01:48, skipping insertion in model container [2024-10-10 22:01:48,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:01:48" (3/3) ... [2024-10-10 22:01:48,485 INFO L112 eAbstractionObserver]: Analyzing ICFG pr3.c [2024-10-10 22:01:48,500 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-10 22:01:48,501 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-10 22:01:48,548 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-10 22:01:48,558 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;@1e330787, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-10 22:01:48,558 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-10 22:01:48,563 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:48,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-10 22:01:48,568 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:01:48,569 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:01:48,570 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:01:48,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:01:48,575 INFO L85 PathProgramCache]: Analyzing trace with hash -2106680282, now seen corresponding path program 1 times [2024-10-10 22:01:48,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:01:48,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983504672] [2024-10-10 22:01:48,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:48,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:01:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:48,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:01:48,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983504672] [2024-10-10 22:01:48,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983504672] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:01:48,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:01:48,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-10 22:01:48,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032090966] [2024-10-10 22:01:48,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:01:48,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-10 22:01:48,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:01:48,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-10 22:01:48,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-10 22:01:48,792 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:48,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:01:48,814 INFO L93 Difference]: Finished difference Result 40 states and 59 transitions. [2024-10-10 22:01:48,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-10 22:01:48,823 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-10 22:01:48,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:01:48,831 INFO L225 Difference]: With dead ends: 40 [2024-10-10 22:01:48,831 INFO L226 Difference]: Without dead ends: 18 [2024-10-10 22:01:48,834 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-10 22:01:48,837 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:01:48,840 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:01:48,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-10-10 22:01:48,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-10-10 22:01:48,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:48,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2024-10-10 22:01:48,866 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 12 [2024-10-10 22:01:48,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:01:48,866 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2024-10-10 22:01:48,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:48,867 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2024-10-10 22:01:48,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-10 22:01:48,867 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:01:48,867 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:01:48,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-10 22:01:48,868 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:01:48,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:01:48,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1426621912, now seen corresponding path program 1 times [2024-10-10 22:01:48,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:01:48,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203941923] [2024-10-10 22:01:48,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:48,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:01:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:49,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:01:49,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203941923] [2024-10-10 22:01:49,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203941923] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:01:49,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:01:49,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-10 22:01:49,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501166674] [2024-10-10 22:01:49,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:01:49,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-10 22:01:49,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:01:49,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-10 22:01:49,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:01:49,094 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:49,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:01:49,125 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2024-10-10 22:01:49,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-10 22:01:49,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-10 22:01:49,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:01:49,127 INFO L225 Difference]: With dead ends: 22 [2024-10-10 22:01:49,127 INFO L226 Difference]: Without dead ends: 20 [2024-10-10 22:01:49,127 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:01:49,129 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 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 [2024-10-10 22:01:49,130 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:01:49,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-10 22:01:49,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-10 22:01:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:49,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2024-10-10 22:01:49,135 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 12 [2024-10-10 22:01:49,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:01:49,136 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2024-10-10 22:01:49,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:49,136 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2024-10-10 22:01:49,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-10 22:01:49,137 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:01:49,137 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:01:49,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-10 22:01:49,138 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:01:49,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:01:49,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1426562330, now seen corresponding path program 1 times [2024-10-10 22:01:49,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:01:49,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674943307] [2024-10-10 22:01:49,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:49,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:01:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:49,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:01:49,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674943307] [2024-10-10 22:01:49,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674943307] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:01:49,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:01:49,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-10 22:01:49,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418859595] [2024-10-10 22:01:49,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:01:49,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-10 22:01:49,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:01:49,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-10 22:01:49,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-10 22:01:49,450 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:49,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:01:49,524 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2024-10-10 22:01:49,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-10 22:01:49,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-10 22:01:49,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:01:49,525 INFO L225 Difference]: With dead ends: 35 [2024-10-10 22:01:49,525 INFO L226 Difference]: Without dead ends: 25 [2024-10-10 22:01:49,525 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-10 22:01:49,526 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:01:49,527 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 16 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:01:49,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-10 22:01:49,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2024-10-10 22:01:49,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:49,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2024-10-10 22:01:49,537 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2024-10-10 22:01:49,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:01:49,539 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2024-10-10 22:01:49,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:49,541 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2024-10-10 22:01:49,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-10 22:01:49,542 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:01:49,542 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:01:49,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-10 22:01:49,542 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:01:49,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:01:49,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1044997251, now seen corresponding path program 1 times [2024-10-10 22:01:49,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:01:49,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132639959] [2024-10-10 22:01:49,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:49,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:01:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:50,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:01:50,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132639959] [2024-10-10 22:01:50,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132639959] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:01:50,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228538215] [2024-10-10 22:01:50,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:50,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:01:50,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:01:50,216 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:01:50,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-10 22:01:50,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:50,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-10 22:01:50,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:01:50,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-10 22:01:50,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-10 22:01:50,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-10 22:01:50,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-10 22:01:50,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:50,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:01:50,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-10-10 22:01:50,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-10-10 22:01:50,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:50,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228538215] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:01:50,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:01:50,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 18 [2024-10-10 22:01:50,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815840776] [2024-10-10 22:01:50,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:01:50,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-10 22:01:50,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:01:50,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-10 22:01:50,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2024-10-10 22:01:50,710 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:51,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:01:51,330 INFO L93 Difference]: Finished difference Result 98 states and 123 transitions. [2024-10-10 22:01:51,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-10 22:01:51,331 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-10-10 22:01:51,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:01:51,333 INFO L225 Difference]: With dead ends: 98 [2024-10-10 22:01:51,333 INFO L226 Difference]: Without dead ends: 89 [2024-10-10 22:01:51,334 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=307, Invalid=953, Unknown=0, NotChecked=0, Total=1260 [2024-10-10 22:01:51,335 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 167 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:01:51,335 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 114 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:01:51,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-10-10 22:01:51,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 29. [2024-10-10 22:01:51,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:51,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2024-10-10 22:01:51,349 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 17 [2024-10-10 22:01:51,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:01:51,349 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2024-10-10 22:01:51,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:51,350 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2024-10-10 22:01:51,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-10 22:01:51,350 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:01:51,350 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:01:51,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-10 22:01:51,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:01:51,556 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:01:51,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:01:51,556 INFO L85 PathProgramCache]: Analyzing trace with hash -343932673, now seen corresponding path program 1 times [2024-10-10 22:01:51,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:01:51,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067433456] [2024-10-10 22:01:51,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:51,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:01:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:51,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:51,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:01:51,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067433456] [2024-10-10 22:01:51,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067433456] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:01:51,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:01:51,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-10 22:01:51,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632226090] [2024-10-10 22:01:51,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:01:51,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-10 22:01:51,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:01:51,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-10 22:01:51,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:01:51,626 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:51,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:01:51,668 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2024-10-10 22:01:51,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-10 22:01:51,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-10-10 22:01:51,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:01:51,669 INFO L225 Difference]: With dead ends: 53 [2024-10-10 22:01:51,670 INFO L226 Difference]: Without dead ends: 38 [2024-10-10 22:01:51,670 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-10 22:01:51,671 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 35 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:01:51,671 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 37 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:01:51,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-10 22:01:51,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2024-10-10 22:01:51,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:51,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2024-10-10 22:01:51,678 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 17 [2024-10-10 22:01:51,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:01:51,679 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2024-10-10 22:01:51,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:51,679 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2024-10-10 22:01:51,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-10 22:01:51,680 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:01:51,680 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:01:51,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-10 22:01:51,680 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:01:51,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:01:51,681 INFO L85 PathProgramCache]: Analyzing trace with hash 336125697, now seen corresponding path program 1 times [2024-10-10 22:01:51,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:01:51,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063827990] [2024-10-10 22:01:51,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:51,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:01:51,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:51,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:01:51,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063827990] [2024-10-10 22:01:51,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063827990] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:01:51,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:01:51,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-10 22:01:51,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379747390] [2024-10-10 22:01:51,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:01:51,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-10 22:01:51,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:01:51,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-10 22:01:51,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:01:51,754 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:51,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:01:51,796 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2024-10-10 22:01:51,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-10 22:01:51,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-10-10 22:01:51,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:01:51,797 INFO L225 Difference]: With dead ends: 53 [2024-10-10 22:01:51,797 INFO L226 Difference]: Without dead ends: 38 [2024-10-10 22:01:51,798 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-10 22:01:51,798 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 35 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:01:51,798 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 37 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:01:51,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-10 22:01:51,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2024-10-10 22:01:51,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:51,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-10-10 22:01:51,807 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2024-10-10 22:01:51,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:01:51,807 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-10-10 22:01:51,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:51,808 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-10-10 22:01:51,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-10 22:01:51,809 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:01:51,809 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:01:51,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-10 22:01:51,809 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:01:51,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:01:51,810 INFO L85 PathProgramCache]: Analyzing trace with hash -56901313, now seen corresponding path program 1 times [2024-10-10 22:01:51,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:01:51,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858832606] [2024-10-10 22:01:51,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:51,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:01:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:52,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:01:52,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858832606] [2024-10-10 22:01:52,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858832606] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:01:52,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454027503] [2024-10-10 22:01:52,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:52,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:01:52,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:01:52,098 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:01:52,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-10 22:01:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:52,155 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-10 22:01:52,157 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:01:52,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:01:52,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-10 22:01:52,296 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:01:52,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2024-10-10 22:01:52,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:52,408 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:01:52,457 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 13 [2024-10-10 22:01:52,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-10-10 22:01:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:52,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454027503] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:01:52,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:01:52,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 7] total 18 [2024-10-10 22:01:52,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807342722] [2024-10-10 22:01:52,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:01:52,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-10 22:01:52,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:01:52,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-10 22:01:52,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-10-10 22:01:52,477 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:52,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:01:52,867 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2024-10-10 22:01:52,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-10 22:01:52,867 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-10-10 22:01:52,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:01:52,868 INFO L225 Difference]: With dead ends: 69 [2024-10-10 22:01:52,868 INFO L226 Difference]: Without dead ends: 67 [2024-10-10 22:01:52,869 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=823, Unknown=0, NotChecked=0, Total=1056 [2024-10-10 22:01:52,869 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 135 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:01:52,870 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 58 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:01:52,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-10 22:01:52,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2024-10-10 22:01:52,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2024-10-10 22:01:52,882 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 17 [2024-10-10 22:01:52,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:01:52,882 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2024-10-10 22:01:52,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:52,883 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2024-10-10 22:01:52,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-10 22:01:52,883 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:01:52,883 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] [2024-10-10 22:01:52,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-10 22:01:53,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:01:53,088 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:01:53,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:01:53,088 INFO L85 PathProgramCache]: Analyzing trace with hash 998108557, now seen corresponding path program 1 times [2024-10-10 22:01:53,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:01:53,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211172803] [2024-10-10 22:01:53,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:53,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:01:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:53,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:01:53,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211172803] [2024-10-10 22:01:53,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211172803] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:01:53,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219119054] [2024-10-10 22:01:53,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:53,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:01:53,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:01:53,399 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:01:53,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-10 22:01:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:53,464 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-10 22:01:53,466 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:01:53,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-10 22:01:53,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-10 22:01:53,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-10 22:01:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:53,634 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:01:53,714 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 19 treesize of output 17 [2024-10-10 22:01:53,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2024-10-10 22:01:53,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:53,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219119054] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:01:53,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:01:53,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2024-10-10 22:01:53,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672061795] [2024-10-10 22:01:53,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:01:53,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-10 22:01:53,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:01:53,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-10 22:01:53,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2024-10-10 22:01:53,734 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:54,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:01:54,339 INFO L93 Difference]: Finished difference Result 142 states and 184 transitions. [2024-10-10 22:01:54,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-10 22:01:54,340 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-10 22:01:54,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:01:54,341 INFO L225 Difference]: With dead ends: 142 [2024-10-10 22:01:54,341 INFO L226 Difference]: Without dead ends: 117 [2024-10-10 22:01:54,342 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2024-10-10 22:01:54,342 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 161 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-10 22:01:54,342 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 114 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-10 22:01:54,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-10-10 22:01:54,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 61. [2024-10-10 22:01:54,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 60 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:54,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2024-10-10 22:01:54,352 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 22 [2024-10-10 22:01:54,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:01:54,352 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2024-10-10 22:01:54,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:54,352 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2024-10-10 22:01:54,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-10 22:01:54,353 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:01:54,353 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:01:54,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-10 22:01:54,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:01:54,558 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:01:54,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:01:54,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1050156474, now seen corresponding path program 1 times [2024-10-10 22:01:54,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:01:54,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476747262] [2024-10-10 22:01:54,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:54,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:01:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:54,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:01:54,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476747262] [2024-10-10 22:01:54,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476747262] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:01:54,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:01:54,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-10 22:01:54,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400111253] [2024-10-10 22:01:54,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:01:54,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 22:01:54,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:01:54,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 22:01:54,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 22:01:54,596 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:54,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:01:54,619 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2024-10-10 22:01:54,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 22:01:54,619 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-10 22:01:54,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:01:54,620 INFO L225 Difference]: With dead ends: 85 [2024-10-10 22:01:54,620 INFO L226 Difference]: Without dead ends: 70 [2024-10-10 22:01:54,621 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 [2024-10-10 22:01:54,621 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 31 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 [2024-10-10 22:01:54,622 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 31 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:01:54,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-10-10 22:01:54,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2024-10-10 22:01:54,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 60 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:54,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2024-10-10 22:01:54,631 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 22 [2024-10-10 22:01:54,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:01:54,632 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2024-10-10 22:01:54,632 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:54,632 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2024-10-10 22:01:54,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-10 22:01:54,633 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:01:54,633 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] [2024-10-10 22:01:54,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-10 22:01:54,633 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:01:54,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:01:54,634 INFO L85 PathProgramCache]: Analyzing trace with hash -281755121, now seen corresponding path program 1 times [2024-10-10 22:01:54,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:01:54,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137455356] [2024-10-10 22:01:54,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:54,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:01:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:54,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 22:01:54,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:01:54,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137455356] [2024-10-10 22:01:54,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137455356] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:01:54,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:01:54,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-10 22:01:54,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070573395] [2024-10-10 22:01:54,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:01:54,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-10 22:01:54,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:01:54,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-10 22:01:54,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:01:54,698 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:54,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:01:54,736 INFO L93 Difference]: Finished difference Result 90 states and 111 transitions. [2024-10-10 22:01:54,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-10 22:01:54,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-10 22:01:54,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:01:54,737 INFO L225 Difference]: With dead ends: 90 [2024-10-10 22:01:54,737 INFO L226 Difference]: Without dead ends: 73 [2024-10-10 22:01:54,738 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-10 22:01:54,738 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 34 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:01:54,739 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 37 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:01:54,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-10-10 22:01:54,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2024-10-10 22:01:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.25) internal successors, (75), 60 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:54,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2024-10-10 22:01:54,748 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 22 [2024-10-10 22:01:54,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:01:54,749 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2024-10-10 22:01:54,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:54,749 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2024-10-10 22:01:54,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-10 22:01:54,750 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:01:54,750 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] [2024-10-10 22:01:54,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-10 22:01:54,750 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:01:54,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:01:54,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1292872371, now seen corresponding path program 1 times [2024-10-10 22:01:54,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:01:54,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452828520] [2024-10-10 22:01:54,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:54,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:01:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:55,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:01:55,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452828520] [2024-10-10 22:01:55,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452828520] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:01:55,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95531190] [2024-10-10 22:01:55,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:55,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:01:55,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:01:55,017 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:01:55,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-10 22:01:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:55,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-10 22:01:55,093 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:01:55,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:01:55,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-10 22:01:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:55,185 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:01:55,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-10-10 22:01:55,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-10 22:01:55,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:55,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95531190] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:01:55,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:01:55,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 15 [2024-10-10 22:01:55,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504714645] [2024-10-10 22:01:55,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:01:55,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-10 22:01:55,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:01:55,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-10 22:01:55,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-10-10 22:01:55,280 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:55,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:01:55,627 INFO L93 Difference]: Finished difference Result 123 states and 146 transitions. [2024-10-10 22:01:55,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-10 22:01:55,627 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-10 22:01:55,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:01:55,628 INFO L225 Difference]: With dead ends: 123 [2024-10-10 22:01:55,628 INFO L226 Difference]: Without dead ends: 121 [2024-10-10 22:01:55,629 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2024-10-10 22:01:55,629 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:01:55,629 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 97 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:01:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-10-10 22:01:55,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 73. [2024-10-10 22:01:55,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.25) internal successors, (90), 72 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:55,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2024-10-10 22:01:55,649 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 22 [2024-10-10 22:01:55,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:01:55,649 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2024-10-10 22:01:55,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:55,650 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2024-10-10 22:01:55,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-10 22:01:55,651 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:01:55,651 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:01:55,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-10 22:01:55,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-10 22:01:55,858 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:01:55,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:01:55,858 INFO L85 PathProgramCache]: Analyzing trace with hash 242814212, now seen corresponding path program 1 times [2024-10-10 22:01:55,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:01:55,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303953598] [2024-10-10 22:01:55,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:55,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:01:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:55,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:01:55,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303953598] [2024-10-10 22:01:55,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303953598] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:01:55,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:01:55,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-10 22:01:55,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458269986] [2024-10-10 22:01:55,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:01:55,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 22:01:55,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:01:55,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 22:01:55,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 22:01:55,902 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:55,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:01:55,926 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2024-10-10 22:01:55,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 22:01:55,927 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-10 22:01:55,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:01:55,927 INFO L225 Difference]: With dead ends: 101 [2024-10-10 22:01:55,927 INFO L226 Difference]: Without dead ends: 77 [2024-10-10 22:01:55,928 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 [2024-10-10 22:01:55,928 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:01:55,928 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 43 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:01:55,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-10-10 22:01:55,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 63. [2024-10-10 22:01:55,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2024-10-10 22:01:55,940 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 22 [2024-10-10 22:01:55,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:01:55,942 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2024-10-10 22:01:55,942 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:55,943 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2024-10-10 22:01:55,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-10 22:01:55,943 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:01:55,943 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:01:55,943 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-10 22:01:55,944 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:01:55,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:01:55,944 INFO L85 PathProgramCache]: Analyzing trace with hash -825793155, now seen corresponding path program 2 times [2024-10-10 22:01:55,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:01:55,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244554832] [2024-10-10 22:01:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:55,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:01:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:56,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:01:56,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244554832] [2024-10-10 22:01:56,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244554832] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:01:56,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932256887] [2024-10-10 22:01:56,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:01:56,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:01:56,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:01:56,176 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:01:56,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-10 22:01:56,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:01:56,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:01:56,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-10 22:01:56,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:01:56,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-10 22:01:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:56,515 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:01:56,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-10-10 22:01:56,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-10-10 22:01:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:56,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932256887] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:01:56,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:01:56,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 22 [2024-10-10 22:01:56,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553375026] [2024-10-10 22:01:56,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:01:56,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-10 22:01:56,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:01:56,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-10 22:01:56,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2024-10-10 22:01:56,617 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:57,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:01:57,133 INFO L93 Difference]: Finished difference Result 121 states and 140 transitions. [2024-10-10 22:01:57,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-10 22:01:57,134 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-10-10 22:01:57,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:01:57,134 INFO L225 Difference]: With dead ends: 121 [2024-10-10 22:01:57,134 INFO L226 Difference]: Without dead ends: 112 [2024-10-10 22:01:57,135 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2024-10-10 22:01:57,136 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 116 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:01:57,136 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 129 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:01:57,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-10-10 22:01:57,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 69. [2024-10-10 22:01:57,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 68 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:57,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2024-10-10 22:01:57,149 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 27 [2024-10-10 22:01:57,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:01:57,150 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2024-10-10 22:01:57,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:57,150 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2024-10-10 22:01:57,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-10 22:01:57,151 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:01:57,151 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:01:57,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-10 22:01:57,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-10 22:01:57,352 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:01:57,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:01:57,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1780230399, now seen corresponding path program 1 times [2024-10-10 22:01:57,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:01:57,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358599057] [2024-10-10 22:01:57,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:57,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:01:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:57,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:01:57,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358599057] [2024-10-10 22:01:57,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358599057] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:01:57,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446774646] [2024-10-10 22:01:57,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:57,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:01:57,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:01:57,582 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:01:57,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-10 22:01:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:57,655 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-10 22:01:57,657 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:01:57,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:01:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:57,873 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:01:57,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-10-10 22:01:57,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-10 22:01:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:57,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446774646] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:01:57,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:01:57,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 22 [2024-10-10 22:01:57,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230244936] [2024-10-10 22:01:57,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:01:57,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-10 22:01:57,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:01:57,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-10 22:01:57,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2024-10-10 22:01:57,961 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:58,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:01:58,359 INFO L93 Difference]: Finished difference Result 162 states and 191 transitions. [2024-10-10 22:01:58,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-10 22:01:58,359 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-10-10 22:01:58,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:01:58,360 INFO L225 Difference]: With dead ends: 162 [2024-10-10 22:01:58,360 INFO L226 Difference]: Without dead ends: 160 [2024-10-10 22:01:58,361 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2024-10-10 22:01:58,364 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 97 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:01:58,364 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 84 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:01:58,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-10-10 22:01:58,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 107. [2024-10-10 22:01:58,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.2264150943396226) internal successors, (130), 106 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:58,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2024-10-10 22:01:58,378 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 27 [2024-10-10 22:01:58,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:01:58,379 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2024-10-10 22:01:58,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:58,379 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2024-10-10 22:01:58,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-10 22:01:58,379 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:01:58,380 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:01:58,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-10 22:01:58,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-10 22:01:58,581 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:01:58,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:01:58,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1770176678, now seen corresponding path program 1 times [2024-10-10 22:01:58,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:01:58,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532593759] [2024-10-10 22:01:58,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:58,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:01:58,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 22:01:58,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:01:58,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532593759] [2024-10-10 22:01:58,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532593759] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:01:58,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:01:58,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-10 22:01:58,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652991932] [2024-10-10 22:01:58,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:01:58,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 22:01:58,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:01:58,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 22:01:58,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 22:01:58,625 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:58,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:01:58,655 INFO L93 Difference]: Finished difference Result 137 states and 164 transitions. [2024-10-10 22:01:58,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 22:01:58,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-10-10 22:01:58,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:01:58,657 INFO L225 Difference]: With dead ends: 137 [2024-10-10 22:01:58,657 INFO L226 Difference]: Without dead ends: 100 [2024-10-10 22:01:58,657 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 [2024-10-10 22:01:58,658 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 33 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 [2024-10-10 22:01:58,659 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 33 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:01:58,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-10-10 22:01:58,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 86. [2024-10-10 22:01:58,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.2) internal successors, (102), 85 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:58,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2024-10-10 22:01:58,676 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 27 [2024-10-10 22:01:58,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:01:58,676 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2024-10-10 22:01:58,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:58,677 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2024-10-10 22:01:58,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-10 22:01:58,677 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:01:58,678 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:01:58,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-10 22:01:58,678 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:01:58,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:01:58,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1956945011, now seen corresponding path program 3 times [2024-10-10 22:01:58,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:01:58,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303552758] [2024-10-10 22:01:58,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:58,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:01:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:01:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:58,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:01:58,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303552758] [2024-10-10 22:01:58,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303552758] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:01:58,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554966214] [2024-10-10 22:01:58,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:01:58,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:01:58,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:01:58,943 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:01:58,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-10 22:01:59,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-10 22:01:59,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:01:59,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-10 22:01:59,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:01:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:59,354 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:01:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:01:59,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554966214] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:01:59,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:01:59,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2024-10-10 22:01:59,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209715571] [2024-10-10 22:01:59,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:01:59,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-10 22:01:59,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:01:59,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-10 22:01:59,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2024-10-10 22:01:59,517 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 28 states, 28 states have (on average 3.0714285714285716) internal successors, (86), 28 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:59,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:01:59,734 INFO L93 Difference]: Finished difference Result 168 states and 191 transitions. [2024-10-10 22:01:59,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-10 22:01:59,734 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.0714285714285716) internal successors, (86), 28 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-10-10 22:01:59,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:01:59,735 INFO L225 Difference]: With dead ends: 168 [2024-10-10 22:01:59,735 INFO L226 Difference]: Without dead ends: 118 [2024-10-10 22:01:59,736 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2024-10-10 22:01:59,736 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 103 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:01:59,736 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 94 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:01:59,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-10-10 22:01:59,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 95. [2024-10-10 22:01:59,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1702127659574468) internal successors, (110), 94 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:59,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 110 transitions. [2024-10-10 22:01:59,747 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 110 transitions. Word has length 32 [2024-10-10 22:01:59,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:01:59,748 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 110 transitions. [2024-10-10 22:01:59,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.0714285714285716) internal successors, (86), 28 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:01:59,748 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 110 transitions. [2024-10-10 22:01:59,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-10 22:01:59,748 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:01:59,749 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:01:59,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-10 22:01:59,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:01:59,953 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:01:59,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:01:59,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1157207388, now seen corresponding path program 4 times [2024-10-10 22:01:59,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:01:59,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862654541] [2024-10-10 22:01:59,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:01:59,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:01:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:00,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:00,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862654541] [2024-10-10 22:02:00,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862654541] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:00,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637824805] [2024-10-10 22:02:00,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 22:02:00,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:00,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:00,396 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:00,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-10 22:02:00,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 22:02:00,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:02:00,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-10-10 22:02:00,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:00,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-10 22:02:00,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-10 22:02:00,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-10 22:02:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:00,943 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:01,272 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 37 treesize of output 33 [2024-10-10 22:02:01,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2024-10-10 22:02:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:01,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637824805] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:01,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:01,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 16] total 39 [2024-10-10 22:02:01,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668557227] [2024-10-10 22:02:01,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:01,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-10 22:02:01,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:01,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-10 22:02:01,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1322, Unknown=0, NotChecked=0, Total=1482 [2024-10-10 22:02:01,497 INFO L87 Difference]: Start difference. First operand 95 states and 110 transitions. Second operand has 39 states, 39 states have (on average 2.6923076923076925) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:04,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:04,002 INFO L93 Difference]: Finished difference Result 251 states and 292 transitions. [2024-10-10 22:02:04,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-10-10 22:02:04,002 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6923076923076925) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-10-10 22:02:04,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:04,004 INFO L225 Difference]: With dead ends: 251 [2024-10-10 22:02:04,004 INFO L226 Difference]: Without dead ends: 242 [2024-10-10 22:02:04,006 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2527 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1124, Invalid=8188, Unknown=0, NotChecked=0, Total=9312 [2024-10-10 22:02:04,007 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 282 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:04,007 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 183 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-10 22:02:04,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2024-10-10 22:02:04,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 117. [2024-10-10 22:02:04,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.1551724137931034) internal successors, (134), 116 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:04,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2024-10-10 22:02:04,023 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 37 [2024-10-10 22:02:04,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:04,024 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2024-10-10 22:02:04,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.6923076923076925) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:04,024 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2024-10-10 22:02:04,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-10 22:02:04,024 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:04,024 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:04,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-10 22:02:04,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-10 22:02:04,225 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:04,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:04,226 INFO L85 PathProgramCache]: Analyzing trace with hash 472308767, now seen corresponding path program 1 times [2024-10-10 22:02:04,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:04,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974139560] [2024-10-10 22:02:04,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:04,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-10 22:02:04,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:04,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974139560] [2024-10-10 22:02:04,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974139560] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:02:04,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:02:04,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-10 22:02:04,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453783567] [2024-10-10 22:02:04,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:02:04,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 22:02:04,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:04,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 22:02:04,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 22:02:04,258 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:04,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:04,290 INFO L93 Difference]: Finished difference Result 158 states and 181 transitions. [2024-10-10 22:02:04,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 22:02:04,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-10-10 22:02:04,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:04,292 INFO L225 Difference]: With dead ends: 158 [2024-10-10 22:02:04,292 INFO L226 Difference]: Without dead ends: 106 [2024-10-10 22:02:04,292 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 [2024-10-10 22:02:04,293 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:04,293 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 41 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:02:04,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-10-10 22:02:04,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2024-10-10 22:02:04,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.1290322580645162) internal successors, (105), 93 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2024-10-10 22:02:04,320 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 37 [2024-10-10 22:02:04,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:04,320 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2024-10-10 22:02:04,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:04,320 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2024-10-10 22:02:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-10 22:02:04,321 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:04,321 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:04,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-10 22:02:04,322 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:04,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:04,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1021802852, now seen corresponding path program 1 times [2024-10-10 22:02:04,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:04,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541284235] [2024-10-10 22:02:04,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:04,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:04,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:04,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:04,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541284235] [2024-10-10 22:02:04,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541284235] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:04,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035879485] [2024-10-10 22:02:04,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:04,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:04,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:04,665 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:04,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-10 22:02:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:04,747 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-10 22:02:04,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:04,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-10 22:02:04,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2024-10-10 22:02:04,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-10-10 22:02:04,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:02:04,925 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:02:04,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2024-10-10 22:02:05,277 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:02:05,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-10-10 22:02:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-10 22:02:05,302 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:05,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-10-10 22:02:05,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2024-10-10 22:02:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-10 22:02:05,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035879485] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:05,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:05,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 32 [2024-10-10 22:02:05,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523669732] [2024-10-10 22:02:05,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:05,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-10 22:02:05,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:05,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-10 22:02:05,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2024-10-10 22:02:05,691 INFO L87 Difference]: Start difference. First operand 94 states and 105 transitions. Second operand has 32 states, 32 states have (on average 3.0625) internal successors, (98), 32 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:07,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:07,287 INFO L93 Difference]: Finished difference Result 168 states and 188 transitions. [2024-10-10 22:02:07,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-10 22:02:07,287 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.0625) internal successors, (98), 32 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-10-10 22:02:07,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:07,288 INFO L225 Difference]: With dead ends: 168 [2024-10-10 22:02:07,288 INFO L226 Difference]: Without dead ends: 159 [2024-10-10 22:02:07,289 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=609, Invalid=3173, Unknown=0, NotChecked=0, Total=3782 [2024-10-10 22:02:07,289 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 210 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 70 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:07,290 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 213 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 882 Invalid, 2 Unknown, 0 Unchecked, 0.8s Time] [2024-10-10 22:02:07,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-10-10 22:02:07,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 111. [2024-10-10 22:02:07,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1272727272727272) internal successors, (124), 110 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:07,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 124 transitions. [2024-10-10 22:02:07,305 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 124 transitions. Word has length 37 [2024-10-10 22:02:07,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:07,306 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 124 transitions. [2024-10-10 22:02:07,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.0625) internal successors, (98), 32 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:07,306 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 124 transitions. [2024-10-10 22:02:07,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-10 22:02:07,307 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:07,307 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:07,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-10 22:02:07,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:07,509 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:07,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:07,510 INFO L85 PathProgramCache]: Analyzing trace with hash 960790214, now seen corresponding path program 5 times [2024-10-10 22:02:07,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:07,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299142126] [2024-10-10 22:02:07,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:07,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:07,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:07,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299142126] [2024-10-10 22:02:07,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299142126] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:07,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727244192] [2024-10-10 22:02:07,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 22:02:07,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:07,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:07,895 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:07,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-10 22:02:07,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-10 22:02:07,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:02:07,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-10 22:02:07,993 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:08,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-10 22:02:08,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-10 22:02:08,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-10 22:02:08,195 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:02:08,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2024-10-10 22:02:08,552 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:02:08,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2024-10-10 22:02:08,559 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:08,559 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:09,019 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 57 treesize of output 53 [2024-10-10 22:02:09,026 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:02:09,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 110 [2024-10-10 22:02:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:09,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727244192] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:09,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:09,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 40 [2024-10-10 22:02:09,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336049776] [2024-10-10 22:02:09,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:09,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-10 22:02:09,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:09,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-10 22:02:09,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1407, Unknown=0, NotChecked=0, Total=1560 [2024-10-10 22:02:09,111 INFO L87 Difference]: Start difference. First operand 111 states and 124 transitions. Second operand has 40 states, 40 states have (on average 2.9) internal successors, (116), 40 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:14,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-10 22:02:31,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:31,742 INFO L93 Difference]: Finished difference Result 261 states and 293 transitions. [2024-10-10 22:02:31,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-10-10 22:02:31,742 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.9) internal successors, (116), 40 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-10-10 22:02:31,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:31,743 INFO L225 Difference]: With dead ends: 261 [2024-10-10 22:02:31,743 INFO L226 Difference]: Without dead ends: 252 [2024-10-10 22:02:31,745 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1916 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=1203, Invalid=7350, Unknown=3, NotChecked=0, Total=8556 [2024-10-10 22:02:31,745 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 500 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:31,746 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 312 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-10-10 22:02:31,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-10-10 22:02:31,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 126. [2024-10-10 22:02:31,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.128) internal successors, (141), 125 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:31,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 141 transitions. [2024-10-10 22:02:31,769 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 141 transitions. Word has length 42 [2024-10-10 22:02:31,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:31,770 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 141 transitions. [2024-10-10 22:02:31,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.9) internal successors, (116), 40 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:31,770 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 141 transitions. [2024-10-10 22:02:31,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-10 22:02:31,770 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:31,770 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:31,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-10 22:02:31,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:31,971 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:31,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:31,972 INFO L85 PathProgramCache]: Analyzing trace with hash -908106940, now seen corresponding path program 2 times [2024-10-10 22:02:31,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:31,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728963892] [2024-10-10 22:02:31,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:31,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:32,365 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:32,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:32,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728963892] [2024-10-10 22:02:32,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728963892] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:32,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373010804] [2024-10-10 22:02:32,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:02:32,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:32,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:32,384 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:32,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-10 22:02:32,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:02:32,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:02:32,475 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-10 22:02:32,477 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:32,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-10 22:02:32,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-10 22:02:32,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-10 22:02:32,880 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:32,881 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:33,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-10-10 22:02:33,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-10-10 22:02:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:33,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373010804] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:33,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:33,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 33 [2024-10-10 22:02:33,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238668800] [2024-10-10 22:02:33,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:33,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-10 22:02:33,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:33,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-10 22:02:33,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2024-10-10 22:02:33,133 INFO L87 Difference]: Start difference. First operand 126 states and 141 transitions. Second operand has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:34,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:34,528 INFO L93 Difference]: Finished difference Result 216 states and 244 transitions. [2024-10-10 22:02:34,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-10-10 22:02:34,529 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-10-10 22:02:34,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:34,529 INFO L225 Difference]: With dead ends: 216 [2024-10-10 22:02:34,530 INFO L226 Difference]: Without dead ends: 207 [2024-10-10 22:02:34,531 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=724, Invalid=4246, Unknown=0, NotChecked=0, Total=4970 [2024-10-10 22:02:34,531 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 243 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:34,532 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 260 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-10 22:02:34,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-10-10 22:02:34,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 126. [2024-10-10 22:02:34,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.128) internal successors, (141), 125 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:34,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 141 transitions. [2024-10-10 22:02:34,551 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 141 transitions. Word has length 42 [2024-10-10 22:02:34,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:34,551 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 141 transitions. [2024-10-10 22:02:34,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:34,552 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 141 transitions. [2024-10-10 22:02:34,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-10 22:02:34,552 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:34,552 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:34,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-10 22:02:34,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-10-10 22:02:34,753 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:34,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:34,753 INFO L85 PathProgramCache]: Analyzing trace with hash -718362938, now seen corresponding path program 2 times [2024-10-10 22:02:34,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:34,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389857093] [2024-10-10 22:02:34,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:34,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:35,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:35,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389857093] [2024-10-10 22:02:35,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389857093] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:35,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342968840] [2024-10-10 22:02:35,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:02:35,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:35,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:35,059 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:35,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-10 22:02:35,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:02:35,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:02:35,155 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-10 22:02:35,157 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:35,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:02:35,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-10 22:02:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:35,528 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:35,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-10-10 22:02:35,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-10 22:02:35,665 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:35,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342968840] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:35,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:35,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 14] total 28 [2024-10-10 22:02:35,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484000825] [2024-10-10 22:02:35,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:35,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-10 22:02:35,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:35,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-10 22:02:35,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2024-10-10 22:02:35,667 INFO L87 Difference]: Start difference. First operand 126 states and 141 transitions. Second operand has 28 states, 28 states have (on average 3.25) internal successors, (91), 28 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:36,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:36,776 INFO L93 Difference]: Finished difference Result 222 states and 249 transitions. [2024-10-10 22:02:36,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-10-10 22:02:36,776 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.25) internal successors, (91), 28 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-10-10 22:02:36,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:36,778 INFO L225 Difference]: With dead ends: 222 [2024-10-10 22:02:36,778 INFO L226 Difference]: Without dead ends: 220 [2024-10-10 22:02:36,779 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=526, Invalid=3380, Unknown=0, NotChecked=0, Total=3906 [2024-10-10 22:02:36,779 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 100 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:36,780 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 191 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-10 22:02:36,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-10-10 22:02:36,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 131. [2024-10-10 22:02:36,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.1307692307692307) internal successors, (147), 130 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:36,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 147 transitions. [2024-10-10 22:02:36,806 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 147 transitions. Word has length 42 [2024-10-10 22:02:36,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:36,806 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 147 transitions. [2024-10-10 22:02:36,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.25) internal successors, (91), 28 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:36,806 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 147 transitions. [2024-10-10 22:02:36,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-10 22:02:36,807 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:36,807 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:36,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-10 22:02:37,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:37,009 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:37,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:37,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1287106532, now seen corresponding path program 6 times [2024-10-10 22:02:37,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:37,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38881634] [2024-10-10 22:02:37,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:37,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:37,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:37,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:37,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38881634] [2024-10-10 22:02:37,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38881634] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:37,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797353466] [2024-10-10 22:02:37,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-10 22:02:37,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:37,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:37,375 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:37,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-10 22:02:37,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-10-10 22:02:37,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:02:37,477 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-10 22:02:37,479 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:37,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:02:37,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-10 22:02:37,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-10 22:02:37,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-10 22:02:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:38,130 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:38,574 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 49 treesize of output 45 [2024-10-10 22:02:38,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:02:38,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 149 [2024-10-10 22:02:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:38,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797353466] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:38,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:38,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 40 [2024-10-10 22:02:38,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021465593] [2024-10-10 22:02:38,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:38,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-10 22:02:38,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:38,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-10 22:02:38,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1399, Unknown=0, NotChecked=0, Total=1560 [2024-10-10 22:02:38,616 INFO L87 Difference]: Start difference. First operand 131 states and 147 transitions. Second operand has 40 states, 40 states have (on average 3.275) internal successors, (131), 40 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:40,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:40,369 INFO L93 Difference]: Finished difference Result 216 states and 241 transitions. [2024-10-10 22:02:40,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-10-10 22:02:40,370 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.275) internal successors, (131), 40 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-10-10 22:02:40,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:40,371 INFO L225 Difference]: With dead ends: 216 [2024-10-10 22:02:40,371 INFO L226 Difference]: Without dead ends: 207 [2024-10-10 22:02:40,372 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=695, Invalid=4417, Unknown=0, NotChecked=0, Total=5112 [2024-10-10 22:02:40,372 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 260 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:40,372 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 310 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-10 22:02:40,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-10-10 22:02:40,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 136. [2024-10-10 22:02:40,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.125925925925926) internal successors, (152), 135 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:40,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 152 transitions. [2024-10-10 22:02:40,391 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 152 transitions. Word has length 47 [2024-10-10 22:02:40,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:40,391 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 152 transitions. [2024-10-10 22:02:40,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.275) internal successors, (131), 40 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:40,392 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 152 transitions. [2024-10-10 22:02:40,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-10 22:02:40,392 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:40,392 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:40,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-10 22:02:40,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:40,593 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:40,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:40,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1492723364, now seen corresponding path program 3 times [2024-10-10 22:02:40,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:40,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984150875] [2024-10-10 22:02:40,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:40,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:40,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:40,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984150875] [2024-10-10 22:02:40,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984150875] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:40,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233795416] [2024-10-10 22:02:40,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:02:40,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:40,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:40,926 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:40,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-10 22:02:41,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-10 22:02:41,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:02:41,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-10 22:02:41,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:41,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-10 22:02:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:41,248 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:41,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-10-10 22:02:41,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-10 22:02:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:41,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233795416] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:41,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:41,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 20 [2024-10-10 22:02:41,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668215043] [2024-10-10 22:02:41,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:41,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-10 22:02:41,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:41,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-10 22:02:41,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2024-10-10 22:02:41,336 INFO L87 Difference]: Start difference. First operand 136 states and 152 transitions. Second operand has 20 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:42,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:42,685 INFO L93 Difference]: Finished difference Result 269 states and 303 transitions. [2024-10-10 22:02:42,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-10-10 22:02:42,686 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-10-10 22:02:42,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:42,687 INFO L225 Difference]: With dead ends: 269 [2024-10-10 22:02:42,687 INFO L226 Difference]: Without dead ends: 267 [2024-10-10 22:02:42,688 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=506, Invalid=3784, Unknown=0, NotChecked=0, Total=4290 [2024-10-10 22:02:42,689 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 67 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:42,689 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 187 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-10 22:02:42,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-10-10 22:02:42,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 146. [2024-10-10 22:02:42,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.1241379310344828) internal successors, (163), 145 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:42,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 163 transitions. [2024-10-10 22:02:42,719 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 163 transitions. Word has length 47 [2024-10-10 22:02:42,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:42,719 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 163 transitions. [2024-10-10 22:02:42,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:42,719 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 163 transitions. [2024-10-10 22:02:42,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-10 22:02:42,720 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:42,720 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:42,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-10 22:02:42,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-10 22:02:42,921 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:42,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:42,921 INFO L85 PathProgramCache]: Analyzing trace with hash 969703814, now seen corresponding path program 7 times [2024-10-10 22:02:42,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:42,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962964535] [2024-10-10 22:02:42,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:42,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:43,269 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 73 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:43,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:43,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962964535] [2024-10-10 22:02:43,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962964535] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:43,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641083754] [2024-10-10 22:02:43,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-10 22:02:43,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:43,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:43,270 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:43,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-10 22:02:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:43,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-10 22:02:43,364 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:43,917 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 99 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:43,917 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 99 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:44,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641083754] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:44,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:44,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 39 [2024-10-10 22:02:44,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496211242] [2024-10-10 22:02:44,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:44,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-10 22:02:44,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:44,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-10 22:02:44,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1115, Unknown=0, NotChecked=0, Total=1482 [2024-10-10 22:02:44,157 INFO L87 Difference]: Start difference. First operand 146 states and 163 transitions. Second operand has 39 states, 39 states have (on average 3.717948717948718) internal successors, (145), 39 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:44,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:44,456 INFO L93 Difference]: Finished difference Result 292 states and 323 transitions. [2024-10-10 22:02:44,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-10 22:02:44,457 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.717948717948718) internal successors, (145), 39 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-10-10 22:02:44,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:44,458 INFO L225 Difference]: With dead ends: 292 [2024-10-10 22:02:44,458 INFO L226 Difference]: Without dead ends: 182 [2024-10-10 22:02:44,459 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=1482, Unknown=0, NotChecked=0, Total=1980 [2024-10-10 22:02:44,460 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 223 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:44,460 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 154 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:02:44,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-10-10 22:02:44,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 166. [2024-10-10 22:02:44,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.1090909090909091) internal successors, (183), 165 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:44,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 183 transitions. [2024-10-10 22:02:44,487 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 183 transitions. Word has length 52 [2024-10-10 22:02:44,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:44,487 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 183 transitions. [2024-10-10 22:02:44,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.717948717948718) internal successors, (145), 39 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:44,487 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 183 transitions. [2024-10-10 22:02:44,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-10 22:02:44,488 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:44,488 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:44,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-10 22:02:44,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-10 22:02:44,688 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:44,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:44,689 INFO L85 PathProgramCache]: Analyzing trace with hash 913053469, now seen corresponding path program 8 times [2024-10-10 22:02:44,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:44,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684944803] [2024-10-10 22:02:44,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:44,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:45,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:45,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684944803] [2024-10-10 22:02:45,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684944803] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:45,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393375367] [2024-10-10 22:02:45,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:02:45,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:45,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:45,193 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:45,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-10 22:02:45,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:02:45,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:02:45,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-10 22:02:45,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:45,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-10 22:02:45,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-10 22:02:45,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-10 22:02:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:46,019 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:46,565 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 37 treesize of output 33 [2024-10-10 22:02:46,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2024-10-10 22:02:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:46,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393375367] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:46,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:46,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 20] total 51 [2024-10-10 22:02:46,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177502133] [2024-10-10 22:02:46,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:46,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-10-10 22:02:46,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:46,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-10-10 22:02:46,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2351, Unknown=0, NotChecked=0, Total=2550 [2024-10-10 22:02:46,900 INFO L87 Difference]: Start difference. First operand 166 states and 183 transitions. Second operand has 51 states, 51 states have (on average 3.235294117647059) internal successors, (165), 51 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:52,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:52,439 INFO L93 Difference]: Finished difference Result 340 states and 382 transitions. [2024-10-10 22:02:52,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-10-10 22:02:52,440 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.235294117647059) internal successors, (165), 51 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-10-10 22:02:52,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:52,441 INFO L225 Difference]: With dead ends: 340 [2024-10-10 22:02:52,441 INFO L226 Difference]: Without dead ends: 331 [2024-10-10 22:02:52,443 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5600 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1886, Invalid=18420, Unknown=0, NotChecked=0, Total=20306 [2024-10-10 22:02:52,443 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 380 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 2552 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 2836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 2552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:52,444 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 363 Invalid, 2836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 2552 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-10-10 22:02:52,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2024-10-10 22:02:52,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 176. [2024-10-10 22:02:52,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.1085714285714285) internal successors, (194), 175 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:52,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 194 transitions. [2024-10-10 22:02:52,480 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 194 transitions. Word has length 57 [2024-10-10 22:02:52,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:52,481 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 194 transitions. [2024-10-10 22:02:52,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.235294117647059) internal successors, (165), 51 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:52,481 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 194 transitions. [2024-10-10 22:02:52,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-10 22:02:52,485 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:52,485 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:52,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-10 22:02:52,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-10 22:02:52,686 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:52,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:52,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1161278113, now seen corresponding path program 2 times [2024-10-10 22:02:52,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:52,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560785502] [2024-10-10 22:02:52,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:52,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:53,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:53,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560785502] [2024-10-10 22:02:53,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560785502] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:53,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102097532] [2024-10-10 22:02:53,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:02:53,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:53,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:53,107 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:53,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-10 22:02:53,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:02:53,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:02:53,209 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-10 22:02:53,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:53,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:02:53,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-10 22:02:53,354 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:02:53,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2024-10-10 22:02:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:53,770 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:53,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-10-10 22:02:53,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-10 22:02:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:53,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102097532] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:53,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:53,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 17] total 35 [2024-10-10 22:02:53,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709756785] [2024-10-10 22:02:53,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:53,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-10 22:02:53,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:53,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-10 22:02:53,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2024-10-10 22:02:53,908 INFO L87 Difference]: Start difference. First operand 176 states and 194 transitions. Second operand has 35 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 35 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:55,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:02:55,563 INFO L93 Difference]: Finished difference Result 299 states and 333 transitions. [2024-10-10 22:02:55,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-10-10 22:02:55,564 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 35 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-10-10 22:02:55,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:02:55,565 INFO L225 Difference]: With dead ends: 299 [2024-10-10 22:02:55,565 INFO L226 Difference]: Without dead ends: 297 [2024-10-10 22:02:55,566 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1963 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=726, Invalid=5916, Unknown=0, NotChecked=0, Total=6642 [2024-10-10 22:02:55,566 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 162 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-10 22:02:55,566 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 245 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1821 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-10 22:02:55,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-10-10 22:02:55,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 176. [2024-10-10 22:02:55,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.1085714285714285) internal successors, (194), 175 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:55,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 194 transitions. [2024-10-10 22:02:55,600 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 194 transitions. Word has length 57 [2024-10-10 22:02:55,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:02:55,601 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 194 transitions. [2024-10-10 22:02:55,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 35 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:02:55,601 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 194 transitions. [2024-10-10 22:02:55,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-10-10 22:02:55,602 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:02:55,602 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:02:55,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-10 22:02:55,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:55,803 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:02:55,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:02:55,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1694807533, now seen corresponding path program 9 times [2024-10-10 22:02:55,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:02:55,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624880454] [2024-10-10 22:02:55,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:02:55,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:02:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:02:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 14 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:56,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:02:56,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624880454] [2024-10-10 22:02:56,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624880454] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:02:56,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219907550] [2024-10-10 22:02:56,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:02:56,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:02:56,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:02:56,355 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:02:56,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-10 22:02:56,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-10-10 22:02:56,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:02:56,512 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-10 22:02:56,513 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:02:56,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-10-10 22:02:56,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-10-10 22:02:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 14 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:57,043 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:02:57,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-10-10 22:02:57,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-10-10 22:02:57,488 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 14 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:02:57,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219907550] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:02:57,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:02:57,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 48 [2024-10-10 22:02:57,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069821697] [2024-10-10 22:02:57,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:02:57,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-10 22:02:57,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:02:57,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-10 22:02:57,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2071, Unknown=0, NotChecked=0, Total=2256 [2024-10-10 22:02:57,490 INFO L87 Difference]: Start difference. First operand 176 states and 194 transitions. Second operand has 48 states, 48 states have (on average 3.6875) internal successors, (177), 48 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:01,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:01,437 INFO L93 Difference]: Finished difference Result 314 states and 351 transitions. [2024-10-10 22:03:01,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-10-10 22:03:01,437 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.6875) internal successors, (177), 48 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2024-10-10 22:03:01,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:01,438 INFO L225 Difference]: With dead ends: 314 [2024-10-10 22:03:01,439 INFO L226 Difference]: Without dead ends: 305 [2024-10-10 22:03:01,440 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3839 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1516, Invalid=13004, Unknown=0, NotChecked=0, Total=14520 [2024-10-10 22:03:01,441 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 545 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 2340 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 2643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 2340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:01,441 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 616 Invalid, 2643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 2340 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-10-10 22:03:01,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-10-10 22:03:01,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 191. [2024-10-10 22:03:01,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.1105263157894736) internal successors, (211), 190 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:01,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 211 transitions. [2024-10-10 22:03:01,477 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 211 transitions. Word has length 62 [2024-10-10 22:03:01,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:01,477 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 211 transitions. [2024-10-10 22:03:01,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.6875) internal successors, (177), 48 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:01,477 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 211 transitions. [2024-10-10 22:03:01,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-10-10 22:03:01,478 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:01,478 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:01,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-10 22:03:01,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-10 22:03:01,678 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:01,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:01,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1989855827, now seen corresponding path program 3 times [2024-10-10 22:03:01,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:01,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855212871] [2024-10-10 22:03:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:01,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:02,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:02,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855212871] [2024-10-10 22:03:02,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855212871] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:02,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170942178] [2024-10-10 22:03:02,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:03:02,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:02,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:02,147 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:02,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-10 22:03:02,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-10-10 22:03:02,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:03:02,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-10 22:03:02,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:02,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-10 22:03:02,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-10-10 22:03:02,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-10-10 22:03:02,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-10-10 22:03:02,471 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:02,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2024-10-10 22:03:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 14 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:03,039 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:03,581 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 49 treesize of output 45 [2024-10-10 22:03:03,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:03,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 143 [2024-10-10 22:03:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 14 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:03,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170942178] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:03,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:03,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 44 [2024-10-10 22:03:03,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87351639] [2024-10-10 22:03:03,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:03,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-10 22:03:03,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:03,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-10 22:03:03,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1695, Unknown=0, NotChecked=0, Total=1892 [2024-10-10 22:03:03,602 INFO L87 Difference]: Start difference. First operand 191 states and 211 transitions. Second operand has 44 states, 44 states have (on average 3.590909090909091) internal successors, (158), 44 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:07,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:07,476 INFO L93 Difference]: Finished difference Result 393 states and 442 transitions. [2024-10-10 22:03:07,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-10-10 22:03:07,477 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.590909090909091) internal successors, (158), 44 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2024-10-10 22:03:07,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:07,478 INFO L225 Difference]: With dead ends: 393 [2024-10-10 22:03:07,478 INFO L226 Difference]: Without dead ends: 384 [2024-10-10 22:03:07,480 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4740 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1271, Invalid=13981, Unknown=0, NotChecked=0, Total=15252 [2024-10-10 22:03:07,481 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 239 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 3335 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 3752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 3335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:07,481 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 359 Invalid, 3752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 3335 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-10-10 22:03:07,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2024-10-10 22:03:07,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 196. [2024-10-10 22:03:07,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.1128205128205129) internal successors, (217), 195 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:07,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 217 transitions. [2024-10-10 22:03:07,534 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 217 transitions. Word has length 62 [2024-10-10 22:03:07,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:07,534 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 217 transitions. [2024-10-10 22:03:07,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.590909090909091) internal successors, (158), 44 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:07,534 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 217 transitions. [2024-10-10 22:03:07,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-10-10 22:03:07,535 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:07,535 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:07,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-10 22:03:07,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-10 22:03:07,740 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:07,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:07,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1777411811, now seen corresponding path program 10 times [2024-10-10 22:03:07,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:07,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535880136] [2024-10-10 22:03:07,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:07,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:07,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:08,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:08,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535880136] [2024-10-10 22:03:08,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535880136] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:08,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656593168] [2024-10-10 22:03:08,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 22:03:08,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:08,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:08,305 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:08,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-10 22:03:08,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 22:03:08,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:03:08,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-10 22:03:08,432 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:08,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-10 22:03:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:09,218 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:09,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-10-10 22:03:09,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-10-10 22:03:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:09,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656593168] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:09,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:09,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 47 [2024-10-10 22:03:09,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366004162] [2024-10-10 22:03:09,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:09,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-10-10 22:03:09,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:09,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-10-10 22:03:09,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2002, Unknown=0, NotChecked=0, Total=2162 [2024-10-10 22:03:09,641 INFO L87 Difference]: Start difference. First operand 196 states and 217 transitions. Second operand has 47 states, 47 states have (on average 4.085106382978723) internal successors, (192), 47 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)