./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array8_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f 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 ../sv-benchmarks/c/array-patterns/array8_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 06625eaf591a62e295090a882d83c1e11aaafca7ac8895e7d4adcf51d5b26e02 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-21 21:01:27,972 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-21 21:01:28,067 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-21 21:01:28,074 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-21 21:01:28,074 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-21 21:01:28,097 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-21 21:01:28,098 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-21 21:01:28,098 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-21 21:01:28,099 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-21 21:01:28,099 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-21 21:01:28,100 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-21 21:01:28,100 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-21 21:01:28,101 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-21 21:01:28,101 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-21 21:01:28,101 INFO L153 SettingsManager]: * Use SBE=true [2024-11-21 21:01:28,102 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-21 21:01:28,105 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-21 21:01:28,105 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-21 21:01:28,106 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-21 21:01:28,106 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-21 21:01:28,106 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-21 21:01:28,107 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-21 21:01:28,107 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-21 21:01:28,107 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-21 21:01:28,107 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-21 21:01:28,108 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-21 21:01:28,108 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-21 21:01:28,108 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-21 21:01:28,108 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-21 21:01:28,109 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-21 21:01:28,109 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-21 21:01:28,111 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-21 21:01:28,111 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-21 21:01:28,112 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-21 21:01:28,112 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-21 21:01:28,113 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-21 21:01:28,113 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-21 21:01:28,113 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-21 21:01:28,113 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-21 21:01:28,114 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-21 21:01:28,114 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-21 21:01:28,115 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-21 21:01:28,115 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06625eaf591a62e295090a882d83c1e11aaafca7ac8895e7d4adcf51d5b26e02 [2024-11-21 21:01:28,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-21 21:01:28,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-21 21:01:28,398 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-21 21:01:28,400 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-21 21:01:28,400 INFO L274 PluginConnector]: CDTParser initialized [2024-11-21 21:01:28,401 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array8_pattern.c [2024-11-21 21:01:29,817 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-21 21:01:29,983 INFO L384 CDTParser]: Found 1 translation units. [2024-11-21 21:01:29,984 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array8_pattern.c [2024-11-21 21:01:29,992 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eebeae718/029b84e7eec84f7db165a96a84e3b248/FLAG1d7805ff9 [2024-11-21 21:01:30,368 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eebeae718/029b84e7eec84f7db165a96a84e3b248 [2024-11-21 21:01:30,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-21 21:01:30,372 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-21 21:01:30,373 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-21 21:01:30,374 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-21 21:01:30,378 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-21 21:01:30,379 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:01:30" (1/1) ... [2024-11-21 21:01:30,380 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d49db7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:30, skipping insertion in model container [2024-11-21 21:01:30,380 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:01:30" (1/1) ... [2024-11-21 21:01:30,400 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-21 21:01:30,579 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array8_pattern.c[1321,1334] [2024-11-21 21:01:30,605 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-21 21:01:30,615 INFO L200 MainTranslator]: Completed pre-run [2024-11-21 21:01:30,628 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array8_pattern.c[1321,1334] [2024-11-21 21:01:30,642 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-21 21:01:30,659 INFO L204 MainTranslator]: Completed translation [2024-11-21 21:01:30,662 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:30 WrapperNode [2024-11-21 21:01:30,663 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-21 21:01:30,664 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-21 21:01:30,664 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-21 21:01:30,664 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-21 21:01:30,671 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:30" (1/1) ... [2024-11-21 21:01:30,676 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:30" (1/1) ... [2024-11-21 21:01:30,693 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2024-11-21 21:01:30,693 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-21 21:01:30,694 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-21 21:01:30,694 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-21 21:01:30,694 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-21 21:01:30,706 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:30" (1/1) ... [2024-11-21 21:01:30,706 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:30" (1/1) ... [2024-11-21 21:01:30,712 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:30" (1/1) ... [2024-11-21 21:01:30,731 INFO L175 MemorySlicer]: Split 9 memory accesses to 3 slices as follows [2, 3, 4]. 44 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 4 writes are split as follows [0, 2, 2]. [2024-11-21 21:01:30,732 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:30" (1/1) ... [2024-11-21 21:01:30,732 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:30" (1/1) ... [2024-11-21 21:01:30,737 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:30" (1/1) ... [2024-11-21 21:01:30,740 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:30" (1/1) ... [2024-11-21 21:01:30,741 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:30" (1/1) ... [2024-11-21 21:01:30,742 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:30" (1/1) ... [2024-11-21 21:01:30,743 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-21 21:01:30,747 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-21 21:01:30,747 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-21 21:01:30,747 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-21 21:01:30,748 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:30" (1/1) ... [2024-11-21 21:01:30,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-21 21:01:30,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:01:30,789 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-21 21:01:30,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-21 21:01:30,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-21 21:01:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-21 21:01:30,838 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-21 21:01:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-21 21:01:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-21 21:01:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-21 21:01:30,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-21 21:01:30,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-21 21:01:30,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-21 21:01:30,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-21 21:01:30,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-21 21:01:30,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-21 21:01:30,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-21 21:01:30,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-21 21:01:30,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-21 21:01:30,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-21 21:01:30,934 INFO L238 CfgBuilder]: Building ICFG [2024-11-21 21:01:30,937 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-21 21:01:31,094 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-11-21 21:01:31,095 INFO L287 CfgBuilder]: Performing block encoding [2024-11-21 21:01:31,105 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-21 21:01:31,105 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-21 21:01:31,106 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:01:31 BoogieIcfgContainer [2024-11-21 21:01:31,106 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-21 21:01:31,108 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-21 21:01:31,108 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-21 21:01:31,112 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-21 21:01:31,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:01:30" (1/3) ... [2024-11-21 21:01:31,112 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2b31ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:01:31, skipping insertion in model container [2024-11-21 21:01:31,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:30" (2/3) ... [2024-11-21 21:01:31,113 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2b31ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:01:31, skipping insertion in model container [2024-11-21 21:01:31,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:01:31" (3/3) ... [2024-11-21 21:01:31,115 INFO L112 eAbstractionObserver]: Analyzing ICFG array8_pattern.c [2024-11-21 21:01:31,136 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-21 21:01:31,136 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-21 21:01:31,210 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-21 21:01:31,217 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;@5aea62c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-21 21:01:31,218 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-21 21:01:31,221 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-21 21:01:31,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-21 21:01:31,229 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:01:31,229 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:01:31,231 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:01:31,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:01:31,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1684436720, now seen corresponding path program 1 times [2024-11-21 21:01:31,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:01:31,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541448622] [2024-11-21 21:01:31,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:01:31,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:01:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:01:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:01:31,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:01:31,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541448622] [2024-11-21 21:01:31,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541448622] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:01:31,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 21:01:31,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-21 21:01:31,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146470549] [2024-11-21 21:01:31,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:01:31,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-21 21:01:31,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:01:31,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-21 21:01:31,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-21 21:01:31,437 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-21 21:01:31,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:01:31,453 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2024-11-21 21:01:31,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-21 21:01:31,455 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-11-21 21:01:31,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:01:31,460 INFO L225 Difference]: With dead ends: 53 [2024-11-21 21:01:31,460 INFO L226 Difference]: Without dead ends: 24 [2024-11-21 21:01:31,462 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-21 21:01:31,465 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 21:01:31,466 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:01:31,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-21 21:01:31,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-21 21:01:31,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-21 21:01:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-11-21 21:01:31,500 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2024-11-21 21:01:31,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:01:31,500 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-11-21 21:01:31,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-21 21:01:31,501 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-11-21 21:01:31,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-21 21:01:31,503 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:01:31,503 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:01:31,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-21 21:01:31,504 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:01:31,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:01:31,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1370727551, now seen corresponding path program 1 times [2024-11-21 21:01:31,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:01:31,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607324299] [2024-11-21 21:01:31,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:01:31,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:01:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:01:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 21:01:32,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:01:32,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607324299] [2024-11-21 21:01:32,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607324299] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:01:32,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073572706] [2024-11-21 21:01:32,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:01:32,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:01:32,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:01:32,054 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:01:32,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-21 21:01:32,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:01:32,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-21 21:01:32,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:01:32,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 21:01:32,360 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-21 21:01:32,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073572706] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:01:32,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-21 21:01:32,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2024-11-21 21:01:32,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409212271] [2024-11-21 21:01:32,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:01:32,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-21 21:01:32,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:01:32,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-21 21:01:32,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-21 21:01:32,366 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-21 21:01:32,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:01:32,433 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2024-11-21 21:01:32,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-21 21:01:32,434 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2024-11-21 21:01:32,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:01:32,436 INFO L225 Difference]: With dead ends: 31 [2024-11-21 21:01:32,436 INFO L226 Difference]: Without dead ends: 27 [2024-11-21 21:01:32,436 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-21 21:01:32,439 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:01:32,441 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 97 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:01:32,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-21 21:01:32,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2024-11-21 21:01:32,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-21 21:01:32,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-11-21 21:01:32,450 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 25 [2024-11-21 21:01:32,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:01:32,451 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-11-21 21:01:32,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-21 21:01:32,453 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-11-21 21:01:32,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-21 21:01:32,454 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:01:32,454 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:01:32,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-21 21:01:32,655 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 [2024-11-21 21:01:32,655 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:01:32,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:01:32,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1339017315, now seen corresponding path program 1 times [2024-11-21 21:01:32,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:01:32,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215857864] [2024-11-21 21:01:32,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:01:32,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:01:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:01:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 21:01:32,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:01:32,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215857864] [2024-11-21 21:01:32,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215857864] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:01:32,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 21:01:32,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-21 21:01:32,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919088212] [2024-11-21 21:01:32,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:01:32,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-21 21:01:32,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:01:32,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-21 21:01:32,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-21 21:01:32,801 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-21 21:01:32,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:01:32,876 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2024-11-21 21:01:32,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-21 21:01:32,877 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2024-11-21 21:01:32,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:01:32,877 INFO L225 Difference]: With dead ends: 47 [2024-11-21 21:01:32,877 INFO L226 Difference]: Without dead ends: 28 [2024-11-21 21:01:32,878 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-21 21:01:32,879 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:01:32,879 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 66 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:01:32,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-21 21:01:32,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2024-11-21 21:01:32,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-21 21:01:32,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-11-21 21:01:32,884 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 27 [2024-11-21 21:01:32,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:01:32,884 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-11-21 21:01:32,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-21 21:01:32,884 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-11-21 21:01:32,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-21 21:01:32,885 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:01:32,885 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:01:32,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-21 21:01:32,885 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:01:32,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:01:32,886 INFO L85 PathProgramCache]: Analyzing trace with hash -294119903, now seen corresponding path program 1 times [2024-11-21 21:01:32,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:01:32,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282438287] [2024-11-21 21:01:32,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:01:32,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:01:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-21 21:01:32,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423812926] [2024-11-21 21:01:32,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:01:32,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:01:32,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:01:32,937 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:01:32,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-21 21:01:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:01:32,999 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-21 21:01:33,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:01:33,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-21 21:01:33,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-21 21:01:33,638 INFO L349 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2024-11-21 21:01:33,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 18 [2024-11-21 21:01:33,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-11-21 21:01:33,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-21 21:01:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:01:33,789 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:01:34,040 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 29 treesize of output 27 [2024-11-21 21:01:34,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2024-11-21 21:01:34,519 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 27 treesize of output 25 [2024-11-21 21:01:34,523 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 41 treesize of output 39 [2024-11-21 21:01:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 21:01:34,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:01:34,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282438287] [2024-11-21 21:01:34,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-21 21:01:34,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423812926] [2024-11-21 21:01:34,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423812926] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:01:34,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-21 21:01:34,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 33 [2024-11-21 21:01:34,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931173319] [2024-11-21 21:01:34,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-21 21:01:34,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-21 21:01:34,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:01:34,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-21 21:01:34,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2024-11-21 21:01:34,586 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 29 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-21 21:01:36,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:01:36,034 INFO L93 Difference]: Finished difference Result 91 states and 108 transitions. [2024-11-21 21:01:36,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-21 21:01:36,037 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 29 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2024-11-21 21:01:36,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:01:36,040 INFO L225 Difference]: With dead ends: 91 [2024-11-21 21:01:36,040 INFO L226 Difference]: Without dead ends: 71 [2024-11-21 21:01:36,042 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=610, Invalid=2930, Unknown=0, NotChecked=0, Total=3540 [2024-11-21 21:01:36,044 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 123 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-21 21:01:36,046 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 219 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-21 21:01:36,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-21 21:01:36,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 52. [2024-11-21 21:01:36,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-21 21:01:36,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2024-11-21 21:01:36,064 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 29 [2024-11-21 21:01:36,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:01:36,064 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2024-11-21 21:01:36,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 29 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-21 21:01:36,065 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2024-11-21 21:01:36,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-21 21:01:36,066 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:01:36,066 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:01:36,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-21 21:01:36,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-21 21:01:36,271 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:01:36,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:01:36,271 INFO L85 PathProgramCache]: Analyzing trace with hash 871848707, now seen corresponding path program 2 times [2024-11-21 21:01:36,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:01:36,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121238989] [2024-11-21 21:01:36,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:01:36,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:01:36,295 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:01:36,296 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:01:36,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 21:01:36,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:01:36,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121238989] [2024-11-21 21:01:36,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121238989] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:01:36,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486493666] [2024-11-21 21:01:36,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:01:36,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:01:36,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:01:36,386 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:01:36,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-21 21:01:36,442 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:01:36,443 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:01:36,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-21 21:01:36,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:01:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:01:36,503 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:01:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 21:01:36,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486493666] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:01:36,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:01:36,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-21 21:01:36,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232539489] [2024-11-21 21:01:36,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:01:36,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-21 21:01:36,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:01:36,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-21 21:01:36,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-21 21:01:36,556 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-21 21:01:36,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:01:36,651 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2024-11-21 21:01:36,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-21 21:01:36,651 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-11-21 21:01:36,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:01:36,652 INFO L225 Difference]: With dead ends: 81 [2024-11-21 21:01:36,652 INFO L226 Difference]: Without dead ends: 71 [2024-11-21 21:01:36,653 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-21 21:01:36,653 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 34 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:01:36,654 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 89 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:01:36,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-21 21:01:36,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2024-11-21 21:01:36,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-21 21:01:36,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2024-11-21 21:01:36,664 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 31 [2024-11-21 21:01:36,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:01:36,665 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2024-11-21 21:01:36,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-21 21:01:36,665 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2024-11-21 21:01:36,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-21 21:01:36,666 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:01:36,666 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:01:36,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-21 21:01:36,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:01:36,871 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:01:36,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:01:36,871 INFO L85 PathProgramCache]: Analyzing trace with hash -2075923361, now seen corresponding path program 3 times [2024-11-21 21:01:36,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:01:36,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232839179] [2024-11-21 21:01:36,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:01:36,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:01:36,905 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-21 21:01:36,906 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:01:36,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 21:01:36,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:01:36,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232839179] [2024-11-21 21:01:36,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232839179] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:01:36,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756337916] [2024-11-21 21:01:36,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:01:36,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:01:36,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:01:36,987 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:01:36,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-21 21:01:37,054 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-21 21:01:37,055 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:01:37,056 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-21 21:01:37,057 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:01:37,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:01:37,115 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:01:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 21:01:37,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756337916] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:01:37,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:01:37,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-21 21:01:37,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393689517] [2024-11-21 21:01:37,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:01:37,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-21 21:01:37,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:01:37,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-21 21:01:37,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-21 21:01:37,178 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-21 21:01:37,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:01:37,299 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2024-11-21 21:01:37,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-21 21:01:37,300 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-11-21 21:01:37,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:01:37,301 INFO L225 Difference]: With dead ends: 74 [2024-11-21 21:01:37,301 INFO L226 Difference]: Without dead ends: 70 [2024-11-21 21:01:37,301 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-21 21:01:37,302 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 40 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:01:37,302 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 94 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:01:37,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-21 21:01:37,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2024-11-21 21:01:37,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-21 21:01:37,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2024-11-21 21:01:37,321 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 31 [2024-11-21 21:01:37,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:01:37,322 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2024-11-21 21:01:37,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-21 21:01:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2024-11-21 21:01:37,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-21 21:01:37,324 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:01:37,324 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:01:37,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-21 21:01:37,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:01:37,525 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:01:37,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:01:37,525 INFO L85 PathProgramCache]: Analyzing trace with hash -2044290623, now seen corresponding path program 4 times [2024-11-21 21:01:37,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:01:37,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486749021] [2024-11-21 21:01:37,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 21:01:37,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:01:37,567 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 21:01:37,567 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-21 21:01:37,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463365254] [2024-11-21 21:01:37,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 21:01:37,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:01:37,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:01:37,571 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:01:37,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-21 21:01:37,653 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 21:01:37,654 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:01:37,656 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-21 21:01:37,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:01:37,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-21 21:01:37,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-21 21:01:37,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-21 21:01:37,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 21:01:38,441 INFO L349 Elim1Store]: treesize reduction 88, result has 40.9 percent of original size [2024-11-21 21:01:38,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 48 treesize of output 73 [2024-11-21 21:01:38,978 INFO L349 Elim1Store]: treesize reduction 141, result has 25.4 percent of original size [2024-11-21 21:01:38,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 63 treesize of output 69 [2024-11-21 21:01:39,381 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:01:39,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 59 [2024-11-21 21:01:39,386 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:01:39,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 35 [2024-11-21 21:01:39,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:01:39,474 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:01:39,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:01:39,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486749021] [2024-11-21 21:01:39,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-21 21:01:39,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463365254] [2024-11-21 21:01:39,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463365254] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:01:39,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-21 21:01:39,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-11-21 21:01:39,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227964552] [2024-11-21 21:01:39,961 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-21 21:01:39,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-21 21:01:39,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:01:39,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-21 21:01:39,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2024-11-21 21:01:39,967 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-21 21:01:40,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:01:40,485 INFO L93 Difference]: Finished difference Result 101 states and 115 transitions. [2024-11-21 21:01:40,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-21 21:01:40,485 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2024-11-21 21:01:40,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:01:40,486 INFO L225 Difference]: With dead ends: 101 [2024-11-21 21:01:40,486 INFO L226 Difference]: Without dead ends: 97 [2024-11-21 21:01:40,487 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=308, Invalid=1498, Unknown=0, NotChecked=0, Total=1806 [2024-11-21 21:01:40,488 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 49 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-21 21:01:40,489 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 222 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-21 21:01:40,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-21 21:01:40,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 81. [2024-11-21 21:01:40,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 69 states have (on average 1.144927536231884) internal successors, (79), 69 states have internal predecessors, (79), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-21 21:01:40,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2024-11-21 21:01:40,505 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 33 [2024-11-21 21:01:40,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:01:40,506 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2024-11-21 21:01:40,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-21 21:01:40,506 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2024-11-21 21:01:40,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-21 21:01:40,508 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:01:40,508 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:01:40,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-21 21:01:40,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:01:40,712 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:01:40,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:01:40,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1786125185, now seen corresponding path program 1 times [2024-11-21 21:01:40,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:01:40,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125430583] [2024-11-21 21:01:40,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:01:40,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:01:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-21 21:01:40,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049513214] [2024-11-21 21:01:40,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:01:40,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:01:40,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:01:40,741 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:01:40,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-21 21:01:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:01:40,806 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-21 21:01:40,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:01:40,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-21 21:01:40,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-21 21:01:40,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 21:01:40,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-21 21:01:41,370 INFO L349 Elim1Store]: treesize reduction 88, result has 40.9 percent of original size [2024-11-21 21:01:41,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 48 treesize of output 73 [2024-11-21 21:01:41,760 INFO L349 Elim1Store]: treesize reduction 104, result has 30.2 percent of original size [2024-11-21 21:01:41,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 48 treesize of output 57 [2024-11-21 21:01:42,468 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:01:42,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 139 treesize of output 117 [2024-11-21 21:01:42,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:01:42,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 83 [2024-11-21 21:01:42,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:01:42,753 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:01:43,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:01:43,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125430583] [2024-11-21 21:01:43,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-21 21:01:43,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049513214] [2024-11-21 21:01:43,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049513214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:01:43,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-21 21:01:43,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-11-21 21:01:43,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114407844] [2024-11-21 21:01:43,181 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-21 21:01:43,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-21 21:01:43,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:01:43,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-21 21:01:43,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2024-11-21 21:01:43,182 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-21 21:01:43,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:01:43,655 INFO L93 Difference]: Finished difference Result 106 states and 119 transitions. [2024-11-21 21:01:43,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-21 21:01:43,656 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2024-11-21 21:01:43,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:01:43,657 INFO L225 Difference]: With dead ends: 106 [2024-11-21 21:01:43,657 INFO L226 Difference]: Without dead ends: 102 [2024-11-21 21:01:43,657 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=184, Invalid=1076, Unknown=0, NotChecked=0, Total=1260 [2024-11-21 21:01:43,658 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 40 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-21 21:01:43,658 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 216 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-21 21:01:43,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-21 21:01:43,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 89. [2024-11-21 21:01:43,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 75 states have internal predecessors, (86), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-21 21:01:43,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2024-11-21 21:01:43,673 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 33 [2024-11-21 21:01:43,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:01:43,674 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2024-11-21 21:01:43,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-21 21:01:43,674 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2024-11-21 21:01:43,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-21 21:01:43,675 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:01:43,675 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:01:43,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-21 21:01:43,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:01:43,880 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:01:43,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:01:43,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1710000477, now seen corresponding path program 5 times [2024-11-21 21:01:43,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:01:43,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808074574] [2024-11-21 21:01:43,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 21:01:43,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:01:43,906 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-21 21:01:43,906 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:01:43,997 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 21:01:43,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:01:43,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808074574] [2024-11-21 21:01:43,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808074574] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:01:43,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453103219] [2024-11-21 21:01:43,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 21:01:43,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:01:43,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:01:44,001 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:01:44,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-21 21:01:44,072 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-21 21:01:44,072 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:01:44,073 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-21 21:01:44,074 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:01:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:01:44,139 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:01:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 21:01:44,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453103219] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:01:44,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:01:44,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-11-21 21:01:44,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587413088] [2024-11-21 21:01:44,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:01:44,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-21 21:01:44,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:01:44,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-21 21:01:44,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-21 21:01:44,193 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-21 21:01:44,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:01:44,311 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2024-11-21 21:01:44,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-21 21:01:44,312 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-11-21 21:01:44,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:01:44,313 INFO L225 Difference]: With dead ends: 130 [2024-11-21 21:01:44,313 INFO L226 Difference]: Without dead ends: 118 [2024-11-21 21:01:44,313 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-11-21 21:01:44,314 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 46 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:01:44,314 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 106 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:01:44,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-21 21:01:44,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 104. [2024-11-21 21:01:44,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 88 states have internal predecessors, (101), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-21 21:01:44,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2024-11-21 21:01:44,338 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 35 [2024-11-21 21:01:44,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:01:44,338 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2024-11-21 21:01:44,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-21 21:01:44,338 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2024-11-21 21:01:44,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-21 21:01:44,343 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:01:44,344 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:01:44,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-21 21:01:44,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:01:44,544 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:01:44,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:01:44,545 INFO L85 PathProgramCache]: Analyzing trace with hash 159457535, now seen corresponding path program 6 times [2024-11-21 21:01:44,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:01:44,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122561207] [2024-11-21 21:01:44,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-21 21:01:44,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:01:44,595 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-21 21:01:44,599 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:01:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 21:01:44,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:01:44,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122561207] [2024-11-21 21:01:44,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122561207] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:01:44,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378138737] [2024-11-21 21:01:44,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-21 21:01:44,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:01:44,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:01:44,739 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:01:44,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-21 21:01:44,802 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-21 21:01:44,802 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:01:44,803 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-21 21:01:44,804 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:01:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:01:44,883 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:01:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 21:01:44,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378138737] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:01:44,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:01:44,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-21 21:01:44,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162565139] [2024-11-21 21:01:44,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:01:44,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-21 21:01:44,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:01:44,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-21 21:01:44,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-21 21:01:44,940 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-21 21:01:45,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:01:45,103 INFO L93 Difference]: Finished difference Result 121 states and 133 transitions. [2024-11-21 21:01:45,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-21 21:01:45,104 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-11-21 21:01:45,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:01:45,106 INFO L225 Difference]: With dead ends: 121 [2024-11-21 21:01:45,106 INFO L226 Difference]: Without dead ends: 117 [2024-11-21 21:01:45,106 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2024-11-21 21:01:45,107 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 57 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:01:45,108 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 135 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:01:45,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-21 21:01:45,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 93. [2024-11-21 21:01:45,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 79 states have (on average 1.139240506329114) internal successors, (90), 79 states have internal predecessors, (90), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-21 21:01:45,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2024-11-21 21:01:45,126 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 35 [2024-11-21 21:01:45,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:01:45,126 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2024-11-21 21:01:45,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-21 21:01:45,126 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2024-11-21 21:01:45,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-21 21:01:45,127 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:01:45,127 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:01:45,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-21 21:01:45,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-21 21:01:45,328 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:01:45,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:01:45,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1326897567, now seen corresponding path program 7 times [2024-11-21 21:01:45,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:01:45,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34211904] [2024-11-21 21:01:45,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-21 21:01:45,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:01:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-21 21:01:45,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191446525] [2024-11-21 21:01:45,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-21 21:01:45,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:01:45,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:01:45,354 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:01:45,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-21 21:01:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:01:45,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-21 21:01:45,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:01:45,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-21 21:01:45,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-21 21:01:45,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 21:01:45,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-21 21:01:45,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2024-11-21 21:01:45,653 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:01:45,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-21 21:01:45,992 INFO L349 Elim1Store]: treesize reduction 54, result has 38.6 percent of original size [2024-11-21 21:01:45,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 43 [2024-11-21 21:01:46,228 INFO L349 Elim1Store]: treesize reduction 54, result has 51.8 percent of original size [2024-11-21 21:01:46,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 56 treesize of output 76 [2024-11-21 21:01:47,099 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:01:47,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 159 treesize of output 111 [2024-11-21 21:01:47,104 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:01:47,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 67 [2024-11-21 21:01:47,161 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:01:47,161 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:01:47,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:01:47,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34211904] [2024-11-21 21:01:47,580 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-21 21:01:47,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191446525] [2024-11-21 21:01:47,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191446525] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:01:47,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-21 21:01:47,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-11-21 21:01:47,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076719673] [2024-11-21 21:01:47,580 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-21 21:01:47,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-21 21:01:47,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:01:47,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-21 21:01:47,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2024-11-21 21:01:47,582 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-21 21:01:48,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:01:48,048 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2024-11-21 21:01:48,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-21 21:01:48,048 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2024-11-21 21:01:48,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:01:48,049 INFO L225 Difference]: With dead ends: 120 [2024-11-21 21:01:48,049 INFO L226 Difference]: Without dead ends: 116 [2024-11-21 21:01:48,050 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2024-11-21 21:01:48,050 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 40 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-21 21:01:48,050 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 209 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-21 21:01:48,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-21 21:01:48,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 106. [2024-11-21 21:01:48,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 90 states have internal predecessors, (103), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-21 21:01:48,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2024-11-21 21:01:48,069 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 37 [2024-11-21 21:01:48,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:01:48,070 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2024-11-21 21:01:48,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-21 21:01:48,070 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2024-11-21 21:01:48,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-21 21:01:48,070 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:01:48,070 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:01:48,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-21 21:01:48,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:01:48,271 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:01:48,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:01:48,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1956952479, now seen corresponding path program 2 times [2024-11-21 21:01:48,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:01:48,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466087565] [2024-11-21 21:01:48,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:01:48,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:01:48,292 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:01:48,292 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-21 21:01:48,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1840263994] [2024-11-21 21:01:48,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:01:48,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:01:48,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:01:48,299 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:01:48,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-21 21:01:48,363 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:01:48,363 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:01:48,364 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-21 21:01:48,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:01:48,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-21 21:01:48,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-21 21:01:48,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-21 21:01:48,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 21:01:48,526 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:01:48,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-21 21:01:48,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2024-11-21 21:01:48,972 INFO L349 Elim1Store]: treesize reduction 132, result has 40.8 percent of original size [2024-11-21 21:01:48,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 62 treesize of output 109 [2024-11-21 21:01:49,430 INFO L349 Elim1Store]: treesize reduction 156, result has 30.0 percent of original size [2024-11-21 21:01:49,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 62 treesize of output 85 [2024-11-21 21:01:50,626 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:01:50,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 224 treesize of output 190 [2024-11-21 21:01:50,650 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:01:50,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 166 treesize of output 128 [2024-11-21 21:01:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:01:51,923 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:01:52,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:01:52,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466087565] [2024-11-21 21:01:52,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-21 21:01:52,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840263994] [2024-11-21 21:01:52,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840263994] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:01:52,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-21 21:01:52,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-11-21 21:01:52,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031109904] [2024-11-21 21:01:52,724 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-21 21:01:52,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-21 21:01:52,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:01:52,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-21 21:01:52,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1202, Unknown=0, NotChecked=0, Total=1406 [2024-11-21 21:01:52,725 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-21 21:01:54,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:01:54,098 INFO L93 Difference]: Finished difference Result 157 states and 182 transitions. [2024-11-21 21:01:54,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-21 21:01:54,098 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2024-11-21 21:01:54,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:01:54,099 INFO L225 Difference]: With dead ends: 157 [2024-11-21 21:01:54,099 INFO L226 Difference]: Without dead ends: 153 [2024-11-21 21:01:54,100 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=484, Invalid=2486, Unknown=0, NotChecked=0, Total=2970 [2024-11-21 21:01:54,101 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 51 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-21 21:01:54,101 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 333 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-21 21:01:54,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-11-21 21:01:54,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 106. [2024-11-21 21:01:54,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 90 states have internal predecessors, (103), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-21 21:01:54,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2024-11-21 21:01:54,127 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 37 [2024-11-21 21:01:54,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:01:54,128 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2024-11-21 21:01:54,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-21 21:01:54,128 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2024-11-21 21:01:54,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-21 21:01:54,128 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:01:54,128 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:01:54,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-21 21:01:54,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-21 21:01:54,329 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:01:54,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:01:54,329 INFO L85 PathProgramCache]: Analyzing trace with hash 509958979, now seen corresponding path program 8 times [2024-11-21 21:01:54,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:01:54,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962832613] [2024-11-21 21:01:54,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:01:54,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:01:54,343 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:01:54,343 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:01:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 21:01:54,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:01:54,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962832613] [2024-11-21 21:01:54,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962832613] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:01:54,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017139861] [2024-11-21 21:01:54,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:01:54,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:01:54,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:01:54,489 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:01:54,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-21 21:01:54,554 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:01:54,554 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:01:54,555 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-21 21:01:54,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:01:54,620 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:01:54,620 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:01:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 21:01:54,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017139861] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:01:54,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:01:54,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-21 21:01:54,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941661283] [2024-11-21 21:01:54,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:01:54,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-21 21:01:54,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:01:54,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-21 21:01:54,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-21 21:01:54,676 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-21 21:01:54,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:01:54,788 INFO L93 Difference]: Finished difference Result 167 states and 186 transitions. [2024-11-21 21:01:54,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-21 21:01:54,789 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-11-21 21:01:54,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:01:54,790 INFO L225 Difference]: With dead ends: 167 [2024-11-21 21:01:54,790 INFO L226 Difference]: Without dead ends: 153 [2024-11-21 21:01:54,790 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2024-11-21 21:01:54,791 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 42 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:01:54,791 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 157 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:01:54,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-11-21 21:01:54,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 132. [2024-11-21 21:01:54,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 112 states have (on average 1.1517857142857142) internal successors, (129), 112 states have internal predecessors, (129), 10 states have call successors, (10), 9 states have call predecessors, (10), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-21 21:01:54,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 149 transitions. [2024-11-21 21:01:54,815 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 149 transitions. Word has length 39 [2024-11-21 21:01:54,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:01:54,816 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 149 transitions. [2024-11-21 21:01:54,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-21 21:01:54,816 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 149 transitions. [2024-11-21 21:01:54,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-21 21:01:54,817 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:01:54,817 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:01:54,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-21 21:01:55,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-21 21:01:55,017 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:01:55,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:01:55,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1866529793, now seen corresponding path program 9 times [2024-11-21 21:01:55,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:01:55,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431004373] [2024-11-21 21:01:55,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:01:55,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:01:55,075 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-21 21:01:55,076 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-21 21:01:55,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423748235] [2024-11-21 21:01:55,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:01:55,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:01:55,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:01:55,081 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:01:55,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-21 21:01:55,187 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-21 21:01:55,187 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:01:55,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-21 21:01:55,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:01:55,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-21 21:01:55,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-21 21:01:55,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-21 21:01:55,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 21:01:55,346 INFO L349 Elim1Store]: treesize reduction 36, result has 39.0 percent of original size [2024-11-21 21:01:55,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 29 [2024-11-21 21:01:55,371 INFO L349 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2024-11-21 21:01:55,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2024-11-21 21:01:55,477 INFO L349 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2024-11-21 21:01:55,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 43 [2024-11-21 21:01:55,507 INFO L349 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2024-11-21 21:01:55,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2024-11-21 21:01:56,323 INFO L349 Elim1Store]: treesize reduction 332, result has 34.3 percent of original size [2024-11-21 21:01:56,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 34 case distinctions, treesize of input 92 treesize of output 197 [2024-11-21 21:01:57,236 INFO L349 Elim1Store]: treesize reduction 448, result has 24.5 percent of original size [2024-11-21 21:01:57,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 2 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 107 treesize of output 178 [2024-11-21 21:01:59,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:01:59,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:01:59,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:01:59,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:01:59,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:01:59,775 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:01:59,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 312 treesize of output 228 [2024-11-21 21:01:59,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:01:59,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:01:59,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:01:59,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:01:59,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:01:59,802 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:01:59,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 204 treesize of output 132 [2024-11-21 21:02:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:02:00,018 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:02:01,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:02:01,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431004373] [2024-11-21 21:02:01,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-21 21:02:01,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423748235] [2024-11-21 21:02:01,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423748235] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:02:01,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-21 21:02:01,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2024-11-21 21:02:01,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128915391] [2024-11-21 21:02:01,515 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-21 21:02:01,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-21 21:02:01,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:02:01,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-21 21:02:01,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1664, Unknown=0, NotChecked=0, Total=1892 [2024-11-21 21:02:01,517 INFO L87 Difference]: Start difference. First operand 132 states and 149 transitions. Second operand has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-21 21:02:02,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:02:02,387 INFO L93 Difference]: Finished difference Result 161 states and 182 transitions. [2024-11-21 21:02:02,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-21 21:02:02,387 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2024-11-21 21:02:02,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:02:02,388 INFO L225 Difference]: With dead ends: 161 [2024-11-21 21:02:02,388 INFO L226 Difference]: Without dead ends: 157 [2024-11-21 21:02:02,389 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=248, Invalid=1822, Unknown=0, NotChecked=0, Total=2070 [2024-11-21 21:02:02,390 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-21 21:02:02,390 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 402 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-21 21:02:02,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-21 21:02:02,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 137. [2024-11-21 21:02:02,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 117 states have (on average 1.1538461538461537) internal successors, (135), 117 states have internal predecessors, (135), 10 states have call successors, (10), 9 states have call predecessors, (10), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-21 21:02:02,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 155 transitions. [2024-11-21 21:02:02,431 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 155 transitions. Word has length 41 [2024-11-21 21:02:02,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:02:02,431 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 155 transitions. [2024-11-21 21:02:02,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-21 21:02:02,432 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 155 transitions. [2024-11-21 21:02:02,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-21 21:02:02,432 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:02:02,433 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:02:02,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-21 21:02:02,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-21 21:02:02,637 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:02:02,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:02:02,637 INFO L85 PathProgramCache]: Analyzing trace with hash 845461439, now seen corresponding path program 3 times [2024-11-21 21:02:02,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:02:02,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496747129] [2024-11-21 21:02:02,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:02:02,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:02:02,720 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-21 21:02:02,720 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-21 21:02:02,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176582474] [2024-11-21 21:02:02,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:02:02,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:02:02,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:02:02,726 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:02:02,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-21 21:02:02,823 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-21 21:02:02,823 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:02:02,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-21 21:02:02,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:02:02,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-21 21:02:02,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-21 21:02:02,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 21:02:02,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-21 21:02:02,962 INFO L349 Elim1Store]: treesize reduction 36, result has 39.0 percent of original size [2024-11-21 21:02:02,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 29 [2024-11-21 21:02:02,987 INFO L349 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2024-11-21 21:02:02,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2024-11-21 21:02:03,084 INFO L349 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2024-11-21 21:02:03,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2024-11-21 21:02:03,119 INFO L349 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2024-11-21 21:02:03,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 43 [2024-11-21 21:02:03,882 INFO L349 Elim1Store]: treesize reduction 332, result has 34.3 percent of original size [2024-11-21 21:02:03,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 34 case distinctions, treesize of input 92 treesize of output 197 [2024-11-21 21:02:05,711 INFO L349 Elim1Store]: treesize reduction 396, result has 21.6 percent of original size [2024-11-21 21:02:05,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 34 case distinctions, treesize of input 92 treesize of output 133 [2024-11-21 21:02:08,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:02:08,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:02:08,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:02:08,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:02:08,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:02:08,758 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:02:08,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 380 treesize of output 346 [2024-11-21 21:02:08,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:02:08,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:02:08,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:02:08,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:02:08,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:02:08,843 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:02:08,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 270 treesize of output 220 [2024-11-21 21:02:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:02:13,132 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:02:14,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:02:14,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496747129] [2024-11-21 21:02:14,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-21 21:02:14,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176582474] [2024-11-21 21:02:14,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176582474] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:02:14,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-21 21:02:14,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2024-11-21 21:02:14,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589379632] [2024-11-21 21:02:14,168 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-21 21:02:14,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-21 21:02:14,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:02:14,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-21 21:02:14,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1735, Unknown=0, NotChecked=0, Total=1980 [2024-11-21 21:02:14,170 INFO L87 Difference]: Start difference. First operand 137 states and 155 transitions. Second operand has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-21 21:02:15,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:02:15,120 INFO L93 Difference]: Finished difference Result 163 states and 184 transitions. [2024-11-21 21:02:15,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-21 21:02:15,120 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2024-11-21 21:02:15,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:02:15,121 INFO L225 Difference]: With dead ends: 163 [2024-11-21 21:02:15,121 INFO L226 Difference]: Without dead ends: 159 [2024-11-21 21:02:15,122 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=283, Invalid=1973, Unknown=0, NotChecked=0, Total=2256 [2024-11-21 21:02:15,122 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-21 21:02:15,122 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 368 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-21 21:02:15,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-21 21:02:15,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 134. [2024-11-21 21:02:15,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 114 states have (on average 1.1491228070175439) internal successors, (131), 114 states have internal predecessors, (131), 10 states have call successors, (10), 9 states have call predecessors, (10), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-21 21:02:15,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 151 transitions. [2024-11-21 21:02:15,149 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 151 transitions. Word has length 41 [2024-11-21 21:02:15,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:02:15,149 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 151 transitions. [2024-11-21 21:02:15,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-21 21:02:15,150 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 151 transitions. [2024-11-21 21:02:15,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-21 21:02:15,150 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:02:15,150 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:02:15,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-21 21:02:15,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-21 21:02:15,351 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:02:15,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:02:15,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1977732841, now seen corresponding path program 1 times [2024-11-21 21:02:15,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:02:15,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181875127] [2024-11-21 21:02:15,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:02:15,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:02:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-21 21:02:15,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [870268689] [2024-11-21 21:02:15,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:02:15,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:02:15,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:02:15,382 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:02:15,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-21 21:02:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:02:15,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-21 21:02:15,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:02:15,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-21 21:02:15,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-21 21:02:15,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-21 21:02:15,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 21:02:15,968 INFO L349 Elim1Store]: treesize reduction 88, result has 40.9 percent of original size [2024-11-21 21:02:15,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 48 treesize of output 73 [2024-11-21 21:02:16,193 INFO L349 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2024-11-21 21:02:16,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 38 [2024-11-21 21:02:16,634 INFO L349 Elim1Store]: treesize reduction 88, result has 40.9 percent of original size [2024-11-21 21:02:16,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 48 treesize of output 73 [2024-11-21 21:02:16,914 INFO L349 Elim1Store]: treesize reduction 24, result has 45.5 percent of original size [2024-11-21 21:02:16,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 53 [2024-11-21 21:02:17,175 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:02:17,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2024-11-21 21:02:17,185 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2024-11-21 21:02:17,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 26 [2024-11-21 21:02:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:02:17,222 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:02:17,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:02:17,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181875127] [2024-11-21 21:02:17,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-21 21:02:17,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870268689] [2024-11-21 21:02:17,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870268689] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:02:17,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-21 21:02:17,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2024-11-21 21:02:17,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342173870] [2024-11-21 21:02:17,595 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-21 21:02:17,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-21 21:02:17,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:02:17,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-21 21:02:17,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1385, Unknown=0, NotChecked=0, Total=1640 [2024-11-21 21:02:17,597 INFO L87 Difference]: Start difference. First operand 134 states and 151 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-21 21:02:18,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:02:18,265 INFO L93 Difference]: Finished difference Result 161 states and 180 transitions. [2024-11-21 21:02:18,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-21 21:02:18,266 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2024-11-21 21:02:18,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:02:18,267 INFO L225 Difference]: With dead ends: 161 [2024-11-21 21:02:18,267 INFO L226 Difference]: Without dead ends: 151 [2024-11-21 21:02:18,268 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=318, Invalid=1844, Unknown=0, NotChecked=0, Total=2162 [2024-11-21 21:02:18,268 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 42 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-21 21:02:18,268 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 306 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-21 21:02:18,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-21 21:02:18,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2024-11-21 21:02:18,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 125 states have (on average 1.144) internal successors, (143), 126 states have internal predecessors, (143), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-21 21:02:18,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 167 transitions. [2024-11-21 21:02:18,311 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 167 transitions. Word has length 43 [2024-11-21 21:02:18,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:02:18,311 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 167 transitions. [2024-11-21 21:02:18,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-21 21:02:18,311 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 167 transitions. [2024-11-21 21:02:18,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-21 21:02:18,312 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:02:18,312 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:02:18,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-21 21:02:18,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:02:18,512 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:02:18,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:02:18,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1719567403, now seen corresponding path program 1 times [2024-11-21 21:02:18,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:02:18,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943075556] [2024-11-21 21:02:18,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:02:18,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:02:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-21 21:02:18,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770139180] [2024-11-21 21:02:18,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:02:18,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:02:18,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:02:18,546 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:02:18,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-21 21:02:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:02:18,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-21 21:02:18,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:02:18,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-21 21:02:18,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-21 21:02:18,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-21 21:02:18,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 21:02:19,073 INFO L349 Elim1Store]: treesize reduction 88, result has 40.9 percent of original size [2024-11-21 21:02:19,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 48 treesize of output 73 [2024-11-21 21:02:19,478 INFO L349 Elim1Store]: treesize reduction 72, result has 30.1 percent of original size [2024-11-21 21:02:19,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 63 treesize of output 66 [2024-11-21 21:02:19,867 INFO L349 Elim1Store]: treesize reduction 88, result has 40.9 percent of original size [2024-11-21 21:02:19,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 48 treesize of output 73 [2024-11-21 21:02:20,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:02:20,086 INFO L349 Elim1Store]: treesize reduction 80, result has 25.2 percent of original size [2024-11-21 21:02:20,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 53 [2024-11-21 21:02:20,583 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:02:20,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 114 [2024-11-21 21:02:20,600 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:02:20,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 88 [2024-11-21 21:02:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:02:20,853 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:02:21,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:02:21,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943075556] [2024-11-21 21:02:21,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-21 21:02:21,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770139180] [2024-11-21 21:02:21,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770139180] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:02:21,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-21 21:02:21,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2024-11-21 21:02:21,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473657199] [2024-11-21 21:02:21,408 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-21 21:02:21,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-21 21:02:21,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:02:21,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-21 21:02:21,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2024-11-21 21:02:21,409 INFO L87 Difference]: Start difference. First operand 148 states and 167 transitions. Second operand has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-21 21:02:22,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:02:22,465 INFO L93 Difference]: Finished difference Result 238 states and 267 transitions. [2024-11-21 21:02:22,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-21 21:02:22,465 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2024-11-21 21:02:22,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:02:22,467 INFO L225 Difference]: With dead ends: 238 [2024-11-21 21:02:22,467 INFO L226 Difference]: Without dead ends: 228 [2024-11-21 21:02:22,468 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=343, Invalid=2107, Unknown=0, NotChecked=0, Total=2450 [2024-11-21 21:02:22,468 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 57 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-21 21:02:22,468 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 309 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-21 21:02:22,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2024-11-21 21:02:22,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 144. [2024-11-21 21:02:22,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 122 states have (on average 1.1475409836065573) internal successors, (140), 122 states have internal predecessors, (140), 11 states have call successors, (11), 10 states have call predecessors, (11), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-21 21:02:22,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 162 transitions. [2024-11-21 21:02:22,503 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 162 transitions. Word has length 43 [2024-11-21 21:02:22,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:02:22,503 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 162 transitions. [2024-11-21 21:02:22,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-21 21:02:22,503 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 162 transitions. [2024-11-21 21:02:22,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-21 21:02:22,504 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:02:22,504 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:02:22,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-21 21:02:22,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-21 21:02:22,705 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:02:22,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:02:22,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1758878123, now seen corresponding path program 2 times [2024-11-21 21:02:22,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:02:22,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619505100] [2024-11-21 21:02:22,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:02:22,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:02:22,734 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:02:22,734 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-21 21:02:22,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058395984] [2024-11-21 21:02:22,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:02:22,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:02:22,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:02:22,738 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:02:22,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-21 21:02:22,817 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:02:22,817 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:02:22,818 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-21 21:02:22,820 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:02:22,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-21 21:02:22,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-21 21:02:22,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-21 21:02:22,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 21:02:23,198 INFO L349 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2024-11-21 21:02:23,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 38 [2024-11-21 21:02:23,334 INFO L349 Elim1Store]: treesize reduction 36, result has 39.0 percent of original size [2024-11-21 21:02:23,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 29 [2024-11-21 21:02:24,365 INFO L349 Elim1Store]: treesize reduction 376, result has 35.1 percent of original size [2024-11-21 21:02:24,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 226 treesize of output 368