./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-examples/standard_running-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_running-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b155d36c818668577415bbab4913364c1907de6bd1c1c9e0d185f4f2f125b180 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 14:33:45,349 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 14:33:45,418 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 14:33:45,425 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 14:33:45,426 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 14:33:45,454 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 14:33:45,454 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 14:33:45,455 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 14:33:45,455 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 14:33:45,458 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 14:33:45,459 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 14:33:45,459 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 14:33:45,459 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 14:33:45,459 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 14:33:45,460 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 14:33:45,460 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 14:33:45,460 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 14:33:45,460 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 14:33:45,460 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 14:33:45,461 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 14:33:45,461 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 14:33:45,463 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 14:33:45,463 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 14:33:45,463 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 14:33:45,464 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 14:33:45,464 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 14:33:45,464 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 14:33:45,464 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 14:33:45,464 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 14:33:45,465 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 14:33:45,465 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 14:33:45,465 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 14:33:45,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:33:45,465 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 14:33:45,465 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 14:33:45,465 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 14:33:45,466 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 14:33:45,466 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 14:33:45,466 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 14:33:45,467 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 14:33:45,467 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 14:33:45,469 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 14:33:45,469 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b155d36c818668577415bbab4913364c1907de6bd1c1c9e0d185f4f2f125b180 [2024-10-12 14:33:45,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 14:33:45,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 14:33:45,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 14:33:45,728 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 14:33:45,728 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 14:33:45,729 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_running-2.i [2024-10-12 14:33:47,017 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 14:33:47,199 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 14:33:47,200 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_running-2.i [2024-10-12 14:33:47,208 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bed1db92/9fef3c756c0e47aeb63fb5fd6e93f3f0/FLAG353f8b381 [2024-10-12 14:33:47,587 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bed1db92/9fef3c756c0e47aeb63fb5fd6e93f3f0 [2024-10-12 14:33:47,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 14:33:47,591 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 14:33:47,592 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 14:33:47,593 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 14:33:47,596 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 14:33:47,597 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:33:47" (1/1) ... [2024-10-12 14:33:47,602 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51845d4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:33:47, skipping insertion in model container [2024-10-12 14:33:47,602 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:33:47" (1/1) ... [2024-10-12 14:33:47,623 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 14:33:47,762 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-examples/standard_running-2.i[811,824] [2024-10-12 14:33:47,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:33:47,786 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 14:33:47,796 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-examples/standard_running-2.i[811,824] [2024-10-12 14:33:47,804 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:33:47,817 INFO L204 MainTranslator]: Completed translation [2024-10-12 14:33:47,817 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:33:47 WrapperNode [2024-10-12 14:33:47,817 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 14:33:47,818 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 14:33:47,818 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 14:33:47,818 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 14:33:47,823 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:33:47" (1/1) ... [2024-10-12 14:33:47,830 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:33:47" (1/1) ... [2024-10-12 14:33:47,848 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2024-10-12 14:33:47,849 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 14:33:47,851 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 14:33:47,852 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 14:33:47,852 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 14:33:47,893 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:33:47" (1/1) ... [2024-10-12 14:33:47,893 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:33:47" (1/1) ... [2024-10-12 14:33:47,894 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:33:47" (1/1) ... [2024-10-12 14:33:47,908 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 3 writes are split as follows [0, 2, 1]. [2024-10-12 14:33:47,908 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:33:47" (1/1) ... [2024-10-12 14:33:47,909 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:33:47" (1/1) ... [2024-10-12 14:33:47,918 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:33:47" (1/1) ... [2024-10-12 14:33:47,920 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:33:47" (1/1) ... [2024-10-12 14:33:47,928 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:33:47" (1/1) ... [2024-10-12 14:33:47,928 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:33:47" (1/1) ... [2024-10-12 14:33:47,930 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 14:33:47,931 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 14:33:47,940 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 14:33:47,940 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 14:33:47,941 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:33:47" (1/1) ... [2024-10-12 14:33:47,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:33:47,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:33:47,979 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-12 14:33:47,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-12 14:33:48,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 14:33:48,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 14:33:48,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 14:33:48,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-12 14:33:48,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-12 14:33:48,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 14:33:48,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 14:33:48,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-12 14:33:48,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 14:33:48,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 14:33:48,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 14:33:48,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 14:33:48,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-12 14:33:48,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-12 14:33:48,115 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 14:33:48,117 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 14:33:48,256 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-10-12 14:33:48,257 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 14:33:48,294 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 14:33:48,294 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-12 14:33:48,295 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:33:48 BoogieIcfgContainer [2024-10-12 14:33:48,295 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 14:33:48,297 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 14:33:48,297 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 14:33:48,300 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 14:33:48,300 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 02:33:47" (1/3) ... [2024-10-12 14:33:48,301 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f69ce8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:33:48, skipping insertion in model container [2024-10-12 14:33:48,301 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:33:47" (2/3) ... [2024-10-12 14:33:48,301 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f69ce8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:33:48, skipping insertion in model container [2024-10-12 14:33:48,302 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:33:48" (3/3) ... [2024-10-12 14:33:48,303 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_running-2.i [2024-10-12 14:33:48,317 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 14:33:48,317 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 14:33:48,368 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 14:33:48,375 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;@fd3ac57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 14:33:48,376 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 14:33:48,379 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 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) [2024-10-12 14:33:48,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-12 14:33:48,385 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:33:48,385 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:33:48,386 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:33:48,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:33:48,390 INFO L85 PathProgramCache]: Analyzing trace with hash -572000217, now seen corresponding path program 1 times [2024-10-12 14:33:48,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:33:48,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084607334] [2024-10-12 14:33:48,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:33:48,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:33:48,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:33:48,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:33:48,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:33:48,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084607334] [2024-10-12 14:33:48,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084607334] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:33:48,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:33:48,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 14:33:48,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348020582] [2024-10-12 14:33:48,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:33:48,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 14:33:48,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:33:48,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 14:33:48,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 14:33:48,579 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 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 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2024-10-12 14:33:48,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:33:48,639 INFO L93 Difference]: Finished difference Result 49 states and 80 transitions. [2024-10-12 14:33:48,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 14:33:48,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2024-10-12 14:33:48,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:33:48,648 INFO L225 Difference]: With dead ends: 49 [2024-10-12 14:33:48,648 INFO L226 Difference]: Without dead ends: 29 [2024-10-12 14:33:48,650 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 14:33:48,676 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:33:48,677 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 25 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:33:48,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-12 14:33:48,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2024-10-12 14:33:48,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 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) [2024-10-12 14:33:48,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2024-10-12 14:33:48,727 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 9 [2024-10-12 14:33:48,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:33:48,727 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2024-10-12 14:33:48,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2024-10-12 14:33:48,728 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2024-10-12 14:33:48,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-12 14:33:48,728 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:33:48,728 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:33:48,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 14:33:48,729 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:33:48,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:33:48,729 INFO L85 PathProgramCache]: Analyzing trace with hash 137950365, now seen corresponding path program 1 times [2024-10-12 14:33:48,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:33:48,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867822998] [2024-10-12 14:33:48,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:33:48,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:33:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:33:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-12 14:33:48,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:33:48,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867822998] [2024-10-12 14:33:48,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867822998] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:33:48,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966285559] [2024-10-12 14:33:48,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:33:48,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:33:48,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:33:48,841 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:33:48,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 14:33:48,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:33:48,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-12 14:33:48,916 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:33:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-12 14:33:48,961 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:33:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-12 14:33:48,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966285559] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:33:48,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:33:48,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-12 14:33:48,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572267530] [2024-10-12 14:33:48,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:33:48,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-12 14:33:48,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:33:48,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-12 14:33:48,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-12 14:33:48,994 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2024-10-12 14:33:49,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:33:49,070 INFO L93 Difference]: Finished difference Result 72 states and 109 transitions. [2024-10-12 14:33:49,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 14:33:49,070 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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 20 [2024-10-12 14:33:49,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:33:49,071 INFO L225 Difference]: With dead ends: 72 [2024-10-12 14:33:49,071 INFO L226 Difference]: Without dead ends: 54 [2024-10-12 14:33:49,071 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-12 14:33:49,072 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 78 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:33:49,073 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 44 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:33:49,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-12 14:33:49,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-10-12 14:33:49,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.4339622641509433) internal successors, (76), 53 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) [2024-10-12 14:33:49,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 76 transitions. [2024-10-12 14:33:49,078 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 76 transitions. Word has length 20 [2024-10-12 14:33:49,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:33:49,078 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 76 transitions. [2024-10-12 14:33:49,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2024-10-12 14:33:49,079 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 76 transitions. [2024-10-12 14:33:49,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-12 14:33:49,080 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:33:49,080 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:33:49,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-12 14:33:49,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:33:49,284 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:33:49,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:33:49,284 INFO L85 PathProgramCache]: Analyzing trace with hash 935035248, now seen corresponding path program 2 times [2024-10-12 14:33:49,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:33:49,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372015492] [2024-10-12 14:33:49,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:33:49,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:33:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:33:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-10-12 14:33:49,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:33:49,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372015492] [2024-10-12 14:33:49,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372015492] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:33:49,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:33:49,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 14:33:49,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131545338] [2024-10-12 14:33:49,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:33:49,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 14:33:49,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:33:49,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 14:33:49,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-12 14:33:49,576 INFO L87 Difference]: Start difference. First operand 54 states and 76 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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) [2024-10-12 14:33:49,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:33:49,633 INFO L93 Difference]: Finished difference Result 105 states and 151 transitions. [2024-10-12 14:33:49,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 14:33:49,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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) Word has length 53 [2024-10-12 14:33:49,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:33:49,635 INFO L225 Difference]: With dead ends: 105 [2024-10-12 14:33:49,635 INFO L226 Difference]: Without dead ends: 78 [2024-10-12 14:33:49,635 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-12 14:33:49,636 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:33:49,636 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 39 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:33:49,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-10-12 14:33:49,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2024-10-12 14:33:49,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.4153846153846155) internal successors, (92), 65 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:33:49,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 92 transitions. [2024-10-12 14:33:49,645 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 92 transitions. Word has length 53 [2024-10-12 14:33:49,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:33:49,645 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 92 transitions. [2024-10-12 14:33:49,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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) [2024-10-12 14:33:49,646 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 92 transitions. [2024-10-12 14:33:49,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-12 14:33:49,647 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:33:49,647 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:33:49,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-12 14:33:49,647 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:33:49,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:33:49,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1511067120, now seen corresponding path program 1 times [2024-10-12 14:33:49,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:33:49,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334973222] [2024-10-12 14:33:49,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:33:49,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:33:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:33:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-10-12 14:33:49,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:33:49,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334973222] [2024-10-12 14:33:49,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334973222] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:33:49,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:33:49,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 14:33:49,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509277790] [2024-10-12 14:33:49,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:33:49,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 14:33:49,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:33:49,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 14:33:49,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-12 14:33:49,801 INFO L87 Difference]: Start difference. First operand 66 states and 92 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2024-10-12 14:33:49,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:33:49,841 INFO L93 Difference]: Finished difference Result 124 states and 174 transitions. [2024-10-12 14:33:49,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 14:33:49,842 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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 53 [2024-10-12 14:33:49,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:33:49,842 INFO L225 Difference]: With dead ends: 124 [2024-10-12 14:33:49,842 INFO L226 Difference]: Without dead ends: 86 [2024-10-12 14:33:49,843 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-12 14:33:49,843 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:33:49,844 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:33:49,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-10-12 14:33:49,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 70. [2024-10-12 14:33:49,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.391304347826087) internal successors, (96), 69 states have internal predecessors, (96), 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) [2024-10-12 14:33:49,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 96 transitions. [2024-10-12 14:33:49,849 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 96 transitions. Word has length 53 [2024-10-12 14:33:49,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:33:49,849 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 96 transitions. [2024-10-12 14:33:49,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2024-10-12 14:33:49,849 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 96 transitions. [2024-10-12 14:33:49,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-12 14:33:49,850 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:33:49,850 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:33:49,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-12 14:33:49,851 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:33:49,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:33:49,851 INFO L85 PathProgramCache]: Analyzing trace with hash -2106781328, now seen corresponding path program 1 times [2024-10-12 14:33:49,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:33:49,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879819349] [2024-10-12 14:33:49,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:33:49,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:33:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:33:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-10-12 14:33:50,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:33:50,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879819349] [2024-10-12 14:33:50,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879819349] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:33:50,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948520844] [2024-10-12 14:33:50,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:33:50,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:33:50,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:33:50,023 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:33:50,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 14:33:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:33:50,105 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-12 14:33:50,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:33:50,126 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-10-12 14:33:50,130 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:33:50,188 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-10-12 14:33:50,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948520844] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:33:50,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:33:50,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-12 14:33:50,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359447385] [2024-10-12 14:33:50,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:33:50,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-12 14:33:50,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:33:50,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-12 14:33:50,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-12 14:33:50,190 INFO L87 Difference]: Start difference. First operand 70 states and 96 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 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) [2024-10-12 14:33:50,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:33:50,342 INFO L93 Difference]: Finished difference Result 224 states and 329 transitions. [2024-10-12 14:33:50,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-12 14:33:50,343 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 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 53 [2024-10-12 14:33:50,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:33:50,344 INFO L225 Difference]: With dead ends: 224 [2024-10-12 14:33:50,344 INFO L226 Difference]: Without dead ends: 160 [2024-10-12 14:33:50,344 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-12 14:33:50,345 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 182 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:33:50,345 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 89 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:33:50,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-10-12 14:33:50,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2024-10-12 14:33:50,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.3962264150943395) internal successors, (222), 159 states have internal predecessors, (222), 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) [2024-10-12 14:33:50,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 222 transitions. [2024-10-12 14:33:50,353 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 222 transitions. Word has length 53 [2024-10-12 14:33:50,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:33:50,354 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 222 transitions. [2024-10-12 14:33:50,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 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) [2024-10-12 14:33:50,354 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 222 transitions. [2024-10-12 14:33:50,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-10-12 14:33:50,356 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:33:50,356 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:33:50,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-12 14:33:50,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:33:50,560 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:33:50,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:33:50,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1885477296, now seen corresponding path program 2 times [2024-10-12 14:33:50,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:33:50,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115083502] [2024-10-12 14:33:50,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:33:50,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:33:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:33:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2024-10-12 14:33:50,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:33:50,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115083502] [2024-10-12 14:33:50,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115083502] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:33:50,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990432709] [2024-10-12 14:33:50,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:33:50,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:33:50,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:33:50,868 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:33:50,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 14:33:50,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:33:50,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:33:50,989 INFO L255 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-12 14:33:50,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:33:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2024-10-12 14:33:51,030 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:33:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2024-10-12 14:33:51,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990432709] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:33:51,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:33:51,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-10-12 14:33:51,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970210573] [2024-10-12 14:33:51,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:33:51,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-12 14:33:51,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:33:51,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-12 14:33:51,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-12 14:33:51,217 INFO L87 Difference]: Start difference. First operand 160 states and 222 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:33:51,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:33:51,531 INFO L93 Difference]: Finished difference Result 488 states and 719 transitions. [2024-10-12 14:33:51,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-12 14:33:51,532 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2024-10-12 14:33:51,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:33:51,534 INFO L225 Difference]: With dead ends: 488 [2024-10-12 14:33:51,534 INFO L226 Difference]: Without dead ends: 340 [2024-10-12 14:33:51,535 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-12 14:33:51,535 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 754 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 14:33:51,537 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 152 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 14:33:51,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2024-10-12 14:33:51,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2024-10-12 14:33:51,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.3982300884955752) internal successors, (474), 339 states have internal predecessors, (474), 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) [2024-10-12 14:33:51,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 474 transitions. [2024-10-12 14:33:51,556 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 474 transitions. Word has length 119 [2024-10-12 14:33:51,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:33:51,556 INFO L471 AbstractCegarLoop]: Abstraction has 340 states and 474 transitions. [2024-10-12 14:33:51,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:33:51,557 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 474 transitions. [2024-10-12 14:33:51,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2024-10-12 14:33:51,559 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:33:51,559 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:33:51,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-12 14:33:51,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:33:51,760 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:33:51,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:33:51,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1998407664, now seen corresponding path program 3 times [2024-10-12 14:33:51,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:33:51,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276780936] [2024-10-12 14:33:51,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:33:51,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:33:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:33:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2024-10-12 14:33:52,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:33:52,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276780936] [2024-10-12 14:33:52,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276780936] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:33:52,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783322610] [2024-10-12 14:33:52,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 14:33:52,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:33:52,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:33:52,821 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:33:52,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 14:33:52,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-12 14:33:52,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:33:52,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-12 14:33:52,980 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:33:53,066 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 11 [2024-10-12 14:33:53,357 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:33:53,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 25 [2024-10-12 14:33:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 107 proven. 127 refuted. 0 times theorem prover too weak. 2373 trivial. 0 not checked. [2024-10-12 14:33:53,487 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:33:53,878 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 [2024-10-12 14:33:53,882 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 12 treesize of output 8 [2024-10-12 14:33:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 64 proven. 148 refuted. 0 times theorem prover too weak. 2395 trivial. 0 not checked. [2024-10-12 14:33:53,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783322610] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:33:53,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:33:53,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 10, 9] total 38 [2024-10-12 14:33:53,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281996725] [2024-10-12 14:33:53,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:33:53,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-12 14:33:53,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:33:53,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-12 14:33:53,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=861, Unknown=0, NotChecked=0, Total=1406 [2024-10-12 14:33:53,910 INFO L87 Difference]: Start difference. First operand 340 states and 474 transitions. Second operand has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 38 states have internal predecessors, (84), 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) [2024-10-12 14:33:56,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:33:56,067 INFO L93 Difference]: Finished difference Result 1056 states and 1506 transitions. [2024-10-12 14:33:56,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2024-10-12 14:33:56,068 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 38 states have internal predecessors, (84), 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 251 [2024-10-12 14:33:56,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:33:56,071 INFO L225 Difference]: With dead ends: 1056 [2024-10-12 14:33:56,071 INFO L226 Difference]: Without dead ends: 740 [2024-10-12 14:33:56,075 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 485 SyntacticMatches, 3 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3171 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3781, Invalid=8651, Unknown=0, NotChecked=0, Total=12432 [2024-10-12 14:33:56,075 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 2544 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2544 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-12 14:33:56,076 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2544 Valid, 217 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-12 14:33:56,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2024-10-12 14:33:56,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 664. [2024-10-12 14:33:56,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 1.4223227752639518) internal successors, (943), 663 states have internal predecessors, (943), 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) [2024-10-12 14:33:56,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 943 transitions. [2024-10-12 14:33:56,101 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 943 transitions. Word has length 251 [2024-10-12 14:33:56,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:33:56,102 INFO L471 AbstractCegarLoop]: Abstraction has 664 states and 943 transitions. [2024-10-12 14:33:56,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 38 states have internal predecessors, (84), 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) [2024-10-12 14:33:56,102 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 943 transitions. [2024-10-12 14:33:56,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2024-10-12 14:33:56,109 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:33:56,109 INFO L215 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:33:56,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-12 14:33:56,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:33:56,310 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:33:56,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:33:56,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1075608353, now seen corresponding path program 1 times [2024-10-12 14:33:56,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:33:56,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304040346] [2024-10-12 14:33:56,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:33:56,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:33:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:33:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3375 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 3050 trivial. 0 not checked. [2024-10-12 14:33:57,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:33:57,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304040346] [2024-10-12 14:33:57,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304040346] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:33:57,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764284369] [2024-10-12 14:33:57,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:33:57,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:33:57,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:33:57,283 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:33:57,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 14:33:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:33:57,491 INFO L255 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-12 14:33:57,499 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:33:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3375 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 3050 trivial. 0 not checked. [2024-10-12 14:33:57,571 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:33:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3375 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 3050 trivial. 0 not checked. [2024-10-12 14:33:58,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764284369] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:33:58,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:33:58,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 54 [2024-10-12 14:33:58,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179591014] [2024-10-12 14:33:58,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:33:58,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-10-12 14:33:58,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:33:58,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-10-12 14:33:58,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2024-10-12 14:33:58,366 INFO L87 Difference]: Start difference. First operand 664 states and 943 transitions. Second operand has 55 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 54 states have internal predecessors, (74), 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) [2024-10-12 14:33:59,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:33:59,474 INFO L93 Difference]: Finished difference Result 2337 states and 3326 transitions. [2024-10-12 14:33:59,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-10-12 14:33:59,475 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 54 states have internal predecessors, (74), 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 284 [2024-10-12 14:33:59,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:33:59,480 INFO L225 Difference]: With dead ends: 2337 [2024-10-12 14:33:59,480 INFO L226 Difference]: Without dead ends: 1700 [2024-10-12 14:33:59,481 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2024-10-12 14:33:59,483 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 2184 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2184 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-12 14:33:59,484 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2184 Valid, 335 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-12 14:33:59,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2024-10-12 14:33:59,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1366. [2024-10-12 14:33:59,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 1.4227106227106228) internal successors, (1942), 1365 states have internal predecessors, (1942), 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) [2024-10-12 14:33:59,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 1942 transitions. [2024-10-12 14:33:59,515 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 1942 transitions. Word has length 284 [2024-10-12 14:33:59,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:33:59,516 INFO L471 AbstractCegarLoop]: Abstraction has 1366 states and 1942 transitions. [2024-10-12 14:33:59,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 54 states have internal predecessors, (74), 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) [2024-10-12 14:33:59,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 1942 transitions. [2024-10-12 14:33:59,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2024-10-12 14:33:59,522 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:33:59,522 INFO L215 NwaCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:33:59,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-12 14:33:59,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:33:59,727 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:33:59,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:33:59,728 INFO L85 PathProgramCache]: Analyzing trace with hash -317933966, now seen corresponding path program 2 times [2024-10-12 14:33:59,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:33:59,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993262758] [2024-10-12 14:33:59,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:33:59,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:33:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:34:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 14742 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 13364 trivial. 0 not checked. [2024-10-12 14:34:02,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:34:02,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993262758] [2024-10-12 14:34:02,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993262758] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:34:02,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339449052] [2024-10-12 14:34:02,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:34:02,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:34:02,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:34:02,906 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:34:02,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 14:34:03,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:34:03,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:34:03,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 1979 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-10-12 14:34:03,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:34:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 14742 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 13364 trivial. 0 not checked. [2024-10-12 14:34:03,415 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:34:06,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14742 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 13364 trivial. 0 not checked. [2024-10-12 14:34:06,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339449052] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:34:06,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:34:06,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 108 [2024-10-12 14:34:06,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061560254] [2024-10-12 14:34:06,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:34:06,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2024-10-12 14:34:06,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:34:06,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2024-10-12 14:34:06,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2024-10-12 14:34:06,312 INFO L87 Difference]: Start difference. First operand 1366 states and 1942 transitions. Second operand has 109 states, 109 states have (on average 1.1743119266055047) internal successors, (128), 108 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:34:12,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:34:12,927 INFO L93 Difference]: Finished difference Result 4740 states and 6755 transitions. [2024-10-12 14:34:12,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2024-10-12 14:34:12,927 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.1743119266055047) internal successors, (128), 108 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 581 [2024-10-12 14:34:12,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:34:12,936 INFO L225 Difference]: With dead ends: 4740 [2024-10-12 14:34:12,936 INFO L226 Difference]: Without dead ends: 3428 [2024-10-12 14:34:12,939 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1214 GetRequests, 1107 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2024-10-12 14:34:12,939 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 6435 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 1101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6435 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 2177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1101 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-10-12 14:34:12,940 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6435 Valid, 656 Invalid, 2177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1101 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-10-12 14:34:12,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3428 states. [2024-10-12 14:34:12,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3428 to 2770. [2024-10-12 14:34:12,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2770 states, 2769 states have (on average 1.4228963524738172) internal successors, (3940), 2769 states have internal predecessors, (3940), 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) [2024-10-12 14:34:12,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 3940 transitions. [2024-10-12 14:34:12,996 INFO L78 Accepts]: Start accepts. Automaton has 2770 states and 3940 transitions. Word has length 581 [2024-10-12 14:34:12,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:34:12,996 INFO L471 AbstractCegarLoop]: Abstraction has 2770 states and 3940 transitions. [2024-10-12 14:34:12,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.1743119266055047) internal successors, (128), 108 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:34:12,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2770 states and 3940 transitions. [2024-10-12 14:34:13,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1176 [2024-10-12 14:34:13,019 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:34:13,019 INFO L215 NwaCegarLoop]: trace histogram [106, 106, 106, 106, 106, 106, 106, 106, 106, 106, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:34:13,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-12 14:34:13,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:34:13,225 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:34:13,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:34:13,225 INFO L85 PathProgramCache]: Analyzing trace with hash -770846126, now seen corresponding path program 3 times [2024-10-12 14:34:13,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:34:13,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701761298] [2024-10-12 14:34:13,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:34:13,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:34:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:34:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 61533 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 55862 trivial. 0 not checked. [2024-10-12 14:34:24,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:34:24,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701761298] [2024-10-12 14:34:24,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701761298] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:34:24,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480480004] [2024-10-12 14:34:24,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 14:34:24,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:34:24,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:34:24,985 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:34:24,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-12 14:34:25,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-12 14:34:25,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:34:25,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-12 14:34:25,385 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:34:25,397 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 11 [2024-10-12 14:34:25,549 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 28 treesize of output 27 [2024-10-12 14:34:27,653 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:34:27,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2024-10-12 14:34:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 61533 backedges. 524 proven. 1362 refuted. 0 times theorem prover too weak. 59647 trivial. 0 not checked. [2024-10-12 14:34:28,145 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:34:29,785 INFO L134 CoverageAnalysis]: Checked inductivity of 61533 backedges. 523 proven. 1363 refuted. 0 times theorem prover too weak. 59647 trivial. 0 not checked. [2024-10-12 14:34:29,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480480004] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:34:29,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:34:29,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 13, 12] total 128 [2024-10-12 14:34:29,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806971909] [2024-10-12 14:34:29,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:34:29,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2024-10-12 14:34:29,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:34:29,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2024-10-12 14:34:29,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7257, Invalid=8999, Unknown=0, NotChecked=0, Total=16256 [2024-10-12 14:34:29,793 INFO L87 Difference]: Start difference. First operand 2770 states and 3940 transitions. Second operand has 128 states, 128 states have (on average 1.421875) internal successors, (182), 128 states have internal predecessors, (182), 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)