./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bAnd4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bAnd4.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 509fca01259c1f1b00d88cc0da560b766d69c2e05ff96a251a9cfffa2096619e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 14:46:42,458 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 14:46:42,518 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 14:46:42,523 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 14:46:42,523 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 14:46:42,548 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 14:46:42,549 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 14:46:42,549 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 14:46:42,550 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 14:46:42,550 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 14:46:42,550 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 14:46:42,551 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 14:46:42,551 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 14:46:42,551 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 14:46:42,552 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 14:46:42,552 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 14:46:42,556 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 14:46:42,556 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 14:46:42,556 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 14:46:42,557 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 14:46:42,557 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 14:46:42,557 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 14:46:42,558 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 14:46:42,558 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 14:46:42,558 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 14:46:42,558 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 14:46:42,558 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 14:46:42,558 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 14:46:42,559 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 14:46:42,559 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 14:46:42,559 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 14:46:42,559 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 14:46:42,559 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:46:42,559 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 14:46:42,560 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 14:46:42,560 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 14:46:42,560 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 14:46:42,560 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 14:46:42,560 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 14:46:42,560 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 14:46:42,561 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 14:46:42,562 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 14:46:42,562 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 509fca01259c1f1b00d88cc0da560b766d69c2e05ff96a251a9cfffa2096619e [2024-10-12 14:46:42,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 14:46:42,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 14:46:42,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 14:46:42,809 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 14:46:42,810 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 14:46:42,811 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bAnd4.i [2024-10-12 14:46:44,088 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 14:46:44,240 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 14:46:44,241 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bAnd4.i [2024-10-12 14:46:44,247 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac95d1b6e/17bbaa1c16194dfa95ef54ae76e10e11/FLAGf778dc086 [2024-10-12 14:46:44,272 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac95d1b6e/17bbaa1c16194dfa95ef54ae76e10e11 [2024-10-12 14:46:44,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 14:46:44,279 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 14:46:44,280 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 14:46:44,280 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 14:46:44,291 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 14:46:44,296 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:46:44" (1/1) ... [2024-10-12 14:46:44,297 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ce3615d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:46:44, skipping insertion in model container [2024-10-12 14:46:44,298 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:46:44" (1/1) ... [2024-10-12 14:46:44,331 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 14:46:44,555 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bAnd4.i[1308,1321] [2024-10-12 14:46:44,558 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:46:44,576 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 14:46:44,590 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bAnd4.i[1308,1321] [2024-10-12 14:46:44,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:46:44,601 INFO L204 MainTranslator]: Completed translation [2024-10-12 14:46:44,602 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:46:44 WrapperNode [2024-10-12 14:46:44,602 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 14:46:44,603 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 14:46:44,603 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 14:46:44,603 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 14:46:44,607 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:46:44" (1/1) ... [2024-10-12 14:46:44,612 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:46:44" (1/1) ... [2024-10-12 14:46:44,624 INFO L138 Inliner]: procedures = 16, calls = 31, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2024-10-12 14:46:44,624 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 14:46:44,625 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 14:46:44,625 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 14:46:44,625 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 14:46:44,640 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:46:44" (1/1) ... [2024-10-12 14:46:44,640 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:46:44" (1/1) ... [2024-10-12 14:46:44,641 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:46:44" (1/1) ... [2024-10-12 14:46:44,650 INFO L175 MemorySlicer]: Split 21 memory accesses to 3 slices as follows [2, 8, 11]. 52 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 5 writes are split as follows [0, 0, 5]. [2024-10-12 14:46:44,650 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:46:44" (1/1) ... [2024-10-12 14:46:44,650 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:46:44" (1/1) ... [2024-10-12 14:46:44,654 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:46:44" (1/1) ... [2024-10-12 14:46:44,659 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:46:44" (1/1) ... [2024-10-12 14:46:44,660 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:46:44" (1/1) ... [2024-10-12 14:46:44,661 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:46:44" (1/1) ... [2024-10-12 14:46:44,662 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 14:46:44,663 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 14:46:44,663 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 14:46:44,663 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 14:46:44,663 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:46:44" (1/1) ... [2024-10-12 14:46:44,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:46:44,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:46:44,686 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-12 14:46:44,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-12 14:46:44,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 14:46:44,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 14:46:44,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 14:46:44,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-12 14:46:44,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-12 14:46:44,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 14:46:44,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 14:46:44,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-12 14:46:44,718 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2024-10-12 14:46:44,718 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2024-10-12 14:46:44,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 14:46:44,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 14:46:44,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 14:46:44,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 14:46:44,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-12 14:46:44,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-12 14:46:44,773 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 14:46:44,774 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 14:46:44,881 INFO L? ?]: Removed 20 outVars from TransFormulas that were not future-live. [2024-10-12 14:46:44,881 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 14:46:44,923 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 14:46:44,924 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-12 14:46:44,925 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:46:44 BoogieIcfgContainer [2024-10-12 14:46:44,925 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 14:46:44,927 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 14:46:44,927 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 14:46:44,930 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 14:46:44,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 02:46:44" (1/3) ... [2024-10-12 14:46:44,930 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a1caebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:46:44, skipping insertion in model container [2024-10-12 14:46:44,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:46:44" (2/3) ... [2024-10-12 14:46:44,931 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a1caebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:46:44, skipping insertion in model container [2024-10-12 14:46:44,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:46:44" (3/3) ... [2024-10-12 14:46:44,932 INFO L112 eAbstractionObserver]: Analyzing ICFG bAnd4.i [2024-10-12 14:46:44,943 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 14:46:44,944 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 14:46:44,990 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 14:46:44,996 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;@4f29856b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 14:46:44,996 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 14:46:44,999 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:46:45,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-12 14:46:45,005 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:46:45,005 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:46:45,006 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:46:45,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:46:45,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1288412435, now seen corresponding path program 1 times [2024-10-12 14:46:45,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:46:45,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422155861] [2024-10-12 14:46:45,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:46:45,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:46:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:45,254 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-12 14:46:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:45,277 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-12 14:46:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:45,291 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-12 14:46:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 14:46:45,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:46:45,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422155861] [2024-10-12 14:46:45,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422155861] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:46:45,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941378843] [2024-10-12 14:46:45,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:46:45,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:46:45,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:46:45,311 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:46:45,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 14:46:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:45,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-12 14:46:45,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:46:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:46:45,400 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 14:46:45,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941378843] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:46:45,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 14:46:45,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2024-10-12 14:46:45,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194521254] [2024-10-12 14:46:45,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:46:45,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 14:46:45,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:46:45,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 14:46:45,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-12 14:46:45,423 INFO L87 Difference]: Start difference. First operand has 24 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-12 14:46:45,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:46:45,489 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2024-10-12 14:46:45,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 14:46:45,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-10-12 14:46:45,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:46:45,527 INFO L225 Difference]: With dead ends: 47 [2024-10-12 14:46:45,527 INFO L226 Difference]: Without dead ends: 23 [2024-10-12 14:46:45,533 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-12 14:46:45,538 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:46:45,539 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:46:45,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-12 14:46:45,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-10-12 14:46:45,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:46:45,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2024-10-12 14:46:45,570 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 25 [2024-10-12 14:46:45,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:46:45,571 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2024-10-12 14:46:45,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-12 14:46:45,571 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2024-10-12 14:46:45,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 14:46:45,573 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:46:45,574 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:46:45,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-12 14:46:45,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-10-12 14:46:45,775 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:46:45,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:46:45,776 INFO L85 PathProgramCache]: Analyzing trace with hash 794330975, now seen corresponding path program 1 times [2024-10-12 14:46:45,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:46:45,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911779093] [2024-10-12 14:46:45,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:46:45,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:46:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:45,884 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-12 14:46:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:45,903 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-12 14:46:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:45,911 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-12 14:46:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 14:46:45,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:46:45,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911779093] [2024-10-12 14:46:45,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911779093] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:46:45,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903809795] [2024-10-12 14:46:45,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:46:45,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:46:45,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:46:45,927 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:46:45,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 14:46:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:46,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-12 14:46:46,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:46:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-12 14:46:46,012 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 14:46:46,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903809795] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:46:46,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 14:46:46,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2024-10-12 14:46:46,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206987238] [2024-10-12 14:46:46,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:46:46,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 14:46:46,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:46:46,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 14:46:46,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-12 14:46:46,015 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 14:46:46,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:46:46,037 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2024-10-12 14:46:46,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 14:46:46,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-10-12 14:46:46,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:46:46,038 INFO L225 Difference]: With dead ends: 46 [2024-10-12 14:46:46,039 INFO L226 Difference]: Without dead ends: 28 [2024-10-12 14:46:46,039 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-12 14:46:46,040 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:46:46,041 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 42 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:46:46,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-12 14:46:46,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2024-10-12 14:46:46,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:46:46,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-10-12 14:46:46,047 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 26 [2024-10-12 14:46:46,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:46:46,047 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-10-12 14:46:46,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 14:46:46,047 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2024-10-12 14:46:46,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-12 14:46:46,049 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:46:46,049 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:46:46,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-12 14:46:46,249 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,SelfDestructingSolverStorable1 [2024-10-12 14:46:46,250 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:46:46,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:46:46,250 INFO L85 PathProgramCache]: Analyzing trace with hash -131171604, now seen corresponding path program 1 times [2024-10-12 14:46:46,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:46:46,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022358104] [2024-10-12 14:46:46,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:46:46,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:46:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:46,334 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-12 14:46:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:46,341 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-12 14:46:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:46,350 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-12 14:46:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-12 14:46:46,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:46:46,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022358104] [2024-10-12 14:46:46,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022358104] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:46:46,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181353409] [2024-10-12 14:46:46,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:46:46,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:46:46,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:46:46,383 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:46:46,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 14:46:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:46,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-12 14:46:46,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:46:46,454 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-12 14:46:46,455 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 14:46:46,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181353409] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:46:46,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 14:46:46,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-10-12 14:46:46,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246045472] [2024-10-12 14:46:46,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:46:46,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 14:46:46,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:46:46,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 14:46:46,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-12 14:46:46,457 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2024-10-12 14:46:46,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:46:46,473 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2024-10-12 14:46:46,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 14:46:46,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 [2024-10-12 14:46:46,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:46:46,475 INFO L225 Difference]: With dead ends: 40 [2024-10-12 14:46:46,475 INFO L226 Difference]: Without dead ends: 25 [2024-10-12 14:46:46,475 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-12 14:46:46,477 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:46:46,477 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:46:46,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-12 14:46:46,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-10-12 14:46:46,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:46:46,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2024-10-12 14:46:46,483 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 35 [2024-10-12 14:46:46,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:46:46,484 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2024-10-12 14:46:46,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2024-10-12 14:46:46,485 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2024-10-12 14:46:46,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-12 14:46:46,485 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:46:46,485 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:46:46,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-12 14:46:46,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:46:46,686 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:46:46,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:46:46,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1415382448, now seen corresponding path program 1 times [2024-10-12 14:46:46,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:46:46,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928937942] [2024-10-12 14:46:46,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:46:46,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:46:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:46,775 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-12 14:46:46,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:46,782 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-12 14:46:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:46,787 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-12 14:46:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-12 14:46:46,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:46:46,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928937942] [2024-10-12 14:46:46,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928937942] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:46:46,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38439458] [2024-10-12 14:46:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:46:46,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:46:46,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:46:46,826 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:46:46,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 14:46:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:46,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-12 14:46:46,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:46:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-12 14:46:46,942 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:46:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-12 14:46:46,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38439458] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:46:46,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:46:46,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2024-10-12 14:46:46,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82704467] [2024-10-12 14:46:46,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:46:46,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-12 14:46:46,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:46:46,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-12 14:46:46,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-12 14:46:46,987 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-12 14:46:47,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:46:47,037 INFO L93 Difference]: Finished difference Result 59 states and 81 transitions. [2024-10-12 14:46:47,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-12 14:46:47,037 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 36 [2024-10-12 14:46:47,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:46:47,039 INFO L225 Difference]: With dead ends: 59 [2024-10-12 14:46:47,042 INFO L226 Difference]: Without dead ends: 37 [2024-10-12 14:46:47,042 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-12 14:46:47,043 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:46:47,043 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 127 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:46:47,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-12 14:46:47,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2024-10-12 14:46:47,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:46:47,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2024-10-12 14:46:47,052 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 36 [2024-10-12 14:46:47,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:46:47,053 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2024-10-12 14:46:47,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-12 14:46:47,053 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2024-10-12 14:46:47,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-12 14:46:47,054 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:46:47,054 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:46:47,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-12 14:46:47,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:46:47,256 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:46:47,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:46:47,257 INFO L85 PathProgramCache]: Analyzing trace with hash -451932245, now seen corresponding path program 2 times [2024-10-12 14:46:47,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:46:47,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152096429] [2024-10-12 14:46:47,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:46:47,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:46:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:47,350 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 14:46:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:47,356 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-12 14:46:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:47,362 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-12 14:46:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2024-10-12 14:46:47,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:46:47,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152096429] [2024-10-12 14:46:47,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152096429] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:46:47,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604585411] [2024-10-12 14:46:47,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:46:47,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:46:47,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:46:47,375 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:46:47,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 14:46:47,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:46:47,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:46:47,453 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-12 14:46:47,454 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:46:47,491 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-10-12 14:46:47,491 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:46:47,570 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-10-12 14:46:47,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604585411] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:46:47,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:46:47,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2024-10-12 14:46:47,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905615567] [2024-10-12 14:46:47,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:46:47,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 14:46:47,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:46:47,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 14:46:47,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-12 14:46:47,574 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-12 14:46:47,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:46:47,619 INFO L93 Difference]: Finished difference Result 67 states and 89 transitions. [2024-10-12 14:46:47,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-12 14:46:47,620 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2024-10-12 14:46:47,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:46:47,620 INFO L225 Difference]: With dead ends: 67 [2024-10-12 14:46:47,620 INFO L226 Difference]: Without dead ends: 40 [2024-10-12 14:46:47,621 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-12 14:46:47,621 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:46:47,621 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 147 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:46:47,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-12 14:46:47,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-10-12 14:46:47,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:46:47,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-10-12 14:46:47,626 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 48 [2024-10-12 14:46:47,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:46:47,626 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-10-12 14:46:47,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-12 14:46:47,626 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-10-12 14:46:47,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-12 14:46:47,627 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:46:47,628 INFO L215 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:46:47,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-12 14:46:47,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:46:47,829 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:46:47,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:46:47,829 INFO L85 PathProgramCache]: Analyzing trace with hash -835342797, now seen corresponding path program 3 times [2024-10-12 14:46:47,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:46:47,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120504056] [2024-10-12 14:46:47,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:46:47,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:46:47,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:47,923 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-12 14:46:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:47,943 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-12 14:46:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:47,948 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-12 14:46:47,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-10-12 14:46:47,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:46:47,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120504056] [2024-10-12 14:46:47,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120504056] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:46:47,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484678569] [2024-10-12 14:46:47,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 14:46:47,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:46:47,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:46:47,957 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:46:47,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 14:46:48,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-12 14:46:48,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:46:48,030 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-12 14:46:48,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:46:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-10-12 14:46:48,051 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:46:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-10-12 14:46:48,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484678569] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:46:48,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:46:48,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-10-12 14:46:48,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469344340] [2024-10-12 14:46:48,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:46:48,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-12 14:46:48,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:46:48,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-12 14:46:48,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-12 14:46:48,097 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:46:48,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:46:48,132 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2024-10-12 14:46:48,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-12 14:46:48,133 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2024-10-12 14:46:48,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:46:48,134 INFO L225 Difference]: With dead ends: 79 [2024-10-12 14:46:48,134 INFO L226 Difference]: Without dead ends: 53 [2024-10-12 14:46:48,134 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-12 14:46:48,135 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:46:48,135 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 86 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:46:48,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-12 14:46:48,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2024-10-12 14:46:48,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:46:48,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2024-10-12 14:46:48,140 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 55 [2024-10-12 14:46:48,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:46:48,140 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2024-10-12 14:46:48,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:46:48,140 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2024-10-12 14:46:48,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-12 14:46:48,141 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:46:48,142 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:46:48,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-12 14:46:48,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:46:48,347 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:46:48,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:46:48,347 INFO L85 PathProgramCache]: Analyzing trace with hash 976023832, now seen corresponding path program 4 times [2024-10-12 14:46:48,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:46:48,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581327407] [2024-10-12 14:46:48,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:46:48,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:46:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:48,553 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-12 14:46:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:48,559 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-12 14:46:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:48,563 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-12 14:46:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:48,569 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-10-12 14:46:48,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:46:48,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581327407] [2024-10-12 14:46:48,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581327407] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:46:48,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769908595] [2024-10-12 14:46:48,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 14:46:48,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:46:48,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:46:48,573 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:46:48,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-12 14:46:48,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 14:46:48,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:46:48,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-12 14:46:48,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:46:48,758 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2024-10-12 14:46:48,758 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:46:48,824 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2024-10-12 14:46:48,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769908595] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:46:48,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:46:48,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 21 [2024-10-12 14:46:48,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797835235] [2024-10-12 14:46:48,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:46:48,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-12 14:46:48,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:46:48,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-12 14:46:48,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2024-10-12 14:46:48,826 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:46:48,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:46:48,876 INFO L93 Difference]: Finished difference Result 112 states and 150 transitions. [2024-10-12 14:46:48,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-12 14:46:48,876 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 68 [2024-10-12 14:46:48,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:46:48,877 INFO L225 Difference]: With dead ends: 112 [2024-10-12 14:46:48,877 INFO L226 Difference]: Without dead ends: 75 [2024-10-12 14:46:48,878 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2024-10-12 14:46:48,878 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 60 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:46:48,879 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 177 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:46:48,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-10-12 14:46:48,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-10-12 14:46:48,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.2714285714285714) internal successors, (89), 70 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:46:48,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2024-10-12 14:46:48,888 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 68 [2024-10-12 14:46:48,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:46:48,888 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2024-10-12 14:46:48,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:46:48,888 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2024-10-12 14:46:48,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-10-12 14:46:48,889 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:46:48,889 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 24, 11, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:46:48,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-12 14:46:49,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:46:49,094 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:46:49,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:46:49,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1259784799, now seen corresponding path program 5 times [2024-10-12 14:46:49,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:46:49,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464108471] [2024-10-12 14:46:49,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:46:49,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:46:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:49,337 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-12 14:46:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:49,367 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-10-12 14:46:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:49,381 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-10-12 14:46:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:49,397 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 933 trivial. 0 not checked. [2024-10-12 14:46:49,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:46:49,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464108471] [2024-10-12 14:46:49,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464108471] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:46:49,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094069414] [2024-10-12 14:46:49,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 14:46:49,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:46:49,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:46:49,404 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:46:49,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-12 14:46:50,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-10-12 14:46:50,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:46:50,154 INFO L255 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-12 14:46:50,156 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:46:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 420 proven. 92 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2024-10-12 14:46:50,273 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:46:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 0 proven. 514 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2024-10-12 14:46:50,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094069414] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:46:50,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:46:50,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 32 [2024-10-12 14:46:50,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644659156] [2024-10-12 14:46:50,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:46:50,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-12 14:46:50,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:46:50,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-12 14:46:50,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2024-10-12 14:46:50,470 INFO L87 Difference]: Start difference. First operand 75 states and 95 transitions. Second operand has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:46:50,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:46:50,546 INFO L93 Difference]: Finished difference Result 188 states and 261 transitions. [2024-10-12 14:46:50,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-12 14:46:50,546 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 114 [2024-10-12 14:46:50,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:46:50,548 INFO L225 Difference]: With dead ends: 188 [2024-10-12 14:46:50,548 INFO L226 Difference]: Without dead ends: 126 [2024-10-12 14:46:50,549 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2024-10-12 14:46:50,549 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 176 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:46:50,549 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 212 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:46:50,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-10-12 14:46:50,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2024-10-12 14:46:50,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.322314049586777) internal successors, (160), 121 states have internal predecessors, (160), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:46:50,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 166 transitions. [2024-10-12 14:46:50,557 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 166 transitions. Word has length 114 [2024-10-12 14:46:50,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:46:50,558 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 166 transitions. [2024-10-12 14:46:50,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:46:50,558 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 166 transitions. [2024-10-12 14:46:50,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2024-10-12 14:46:50,560 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:46:50,560 INFO L215 NwaCegarLoop]: trace histogram [54, 54, 54, 12, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:46:50,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-12 14:46:50,760 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,SelfDestructingSolverStorable7 [2024-10-12 14:46:50,761 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:46:50,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:46:50,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1716270413, now seen corresponding path program 6 times [2024-10-12 14:46:50,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:46:50,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116091283] [2024-10-12 14:46:50,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:46:50,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:46:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:51,134 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-12 14:46:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:51,152 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-10-12 14:46:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:51,167 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2024-10-12 14:46:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 4488 trivial. 0 not checked. [2024-10-12 14:46:51,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:46:51,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116091283] [2024-10-12 14:46:51,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116091283] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:46:51,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914714732] [2024-10-12 14:46:51,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-12 14:46:51,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:46:51,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:46:51,188 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:46:51,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-12 14:46:51,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-10-12 14:46:51,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:46:51,398 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-12 14:46:51,400 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:46:51,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 2024 proven. 21 refuted. 0 times theorem prover too weak. 2521 trivial. 0 not checked. [2024-10-12 14:46:51,481 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:46:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4545 trivial. 0 not checked. [2024-10-12 14:46:51,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914714732] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:46:51,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:46:51,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2024-10-12 14:46:51,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818169188] [2024-10-12 14:46:51,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:46:51,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-12 14:46:51,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:46:51,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-12 14:46:51,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2024-10-12 14:46:51,637 INFO L87 Difference]: Start difference. First operand 126 states and 166 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:46:51,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:46:51,747 INFO L93 Difference]: Finished difference Result 247 states and 335 transitions. [2024-10-12 14:46:51,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-12 14:46:51,747 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 205 [2024-10-12 14:46:51,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:46:51,751 INFO L225 Difference]: With dead ends: 247 [2024-10-12 14:46:51,751 INFO L226 Difference]: Without dead ends: 135 [2024-10-12 14:46:51,752 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2024-10-12 14:46:51,753 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:46:51,753 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 126 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:46:51,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-10-12 14:46:51,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2024-10-12 14:46:51,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.3) internal successors, (169), 130 states have internal predecessors, (169), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:46:51,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 175 transitions. [2024-10-12 14:46:51,770 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 175 transitions. Word has length 205 [2024-10-12 14:46:51,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:46:51,770 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 175 transitions. [2024-10-12 14:46:51,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:46:51,770 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 175 transitions. [2024-10-12 14:46:51,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2024-10-12 14:46:51,772 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:46:51,772 INFO L215 NwaCegarLoop]: trace histogram [54, 54, 54, 14, 13, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:46:51,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-12 14:46:51,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:46:51,973 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:46:51,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:46:51,974 INFO L85 PathProgramCache]: Analyzing trace with hash -502425857, now seen corresponding path program 7 times [2024-10-12 14:46:51,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:46:51,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459316310] [2024-10-12 14:46:51,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:46:51,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:46:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:52,361 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-12 14:46:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:52,380 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-12 14:46:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:52,396 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2024-10-12 14:46:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-12 14:46:52,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:46:52,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459316310] [2024-10-12 14:46:52,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459316310] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:46:52,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957692612] [2024-10-12 14:46:52,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-12 14:46:52,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:46:52,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:46:52,415 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:46:52,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-12 14:46:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:52,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-12 14:46:52,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:46:52,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-12 14:46:52,622 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:46:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-12 14:46:52,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957692612] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:46:52,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:46:52,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 31 [2024-10-12 14:46:52,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255625142] [2024-10-12 14:46:52,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:46:52,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-12 14:46:52,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:46:52,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-12 14:46:52,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2024-10-12 14:46:52,888 INFO L87 Difference]: Start difference. First operand 135 states and 175 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-12 14:46:52,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:46:52,930 INFO L93 Difference]: Finished difference Result 270 states and 364 transitions. [2024-10-12 14:46:52,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-12 14:46:52,931 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 214 [2024-10-12 14:46:52,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:46:52,932 INFO L225 Difference]: With dead ends: 270 [2024-10-12 14:46:52,936 INFO L226 Difference]: Without dead ends: 150 [2024-10-12 14:46:52,937 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2024-10-12 14:46:52,937 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:46:52,938 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:46:52,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-10-12 14:46:52,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2024-10-12 14:46:52,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.2689655172413794) internal successors, (184), 145 states have internal predecessors, (184), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:46:52,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 190 transitions. [2024-10-12 14:46:52,950 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 190 transitions. Word has length 214 [2024-10-12 14:46:52,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:46:52,951 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 190 transitions. [2024-10-12 14:46:52,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-12 14:46:52,953 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 190 transitions. [2024-10-12 14:46:52,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2024-10-12 14:46:52,954 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:46:52,954 INFO L215 NwaCegarLoop]: trace histogram [54, 54, 54, 28, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:46:52,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-12 14:46:53,155 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,SelfDestructingSolverStorable9 [2024-10-12 14:46:53,155 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:46:53,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:46:53,157 INFO L85 PathProgramCache]: Analyzing trace with hash -970550605, now seen corresponding path program 8 times [2024-10-12 14:46:53,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:46:53,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434335569] [2024-10-12 14:46:53,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:46:53,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:46:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:54,044 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-12 14:46:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:54,057 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-10-12 14:46:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:54,069 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2024-10-12 14:46:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:54,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-12 14:46:54,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:46:54,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434335569] [2024-10-12 14:46:54,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434335569] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:46:54,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470000363] [2024-10-12 14:46:54,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:46:54,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:46:54,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:46:54,087 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:46:54,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-12 14:46:54,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:46:54,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:46:54,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-12 14:46:54,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:46:54,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-12 14:46:54,407 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:46:55,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-12 14:46:55,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470000363] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:46:55,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:46:55,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 31] total 61 [2024-10-12 14:46:55,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594548105] [2024-10-12 14:46:55,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:46:55,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-10-12 14:46:55,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:46:55,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-10-12 14:46:55,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2024-10-12 14:46:55,454 INFO L87 Difference]: Start difference. First operand 150 states and 190 transitions. Second operand has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-12 14:46:55,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:46:55,514 INFO L93 Difference]: Finished difference Result 300 states and 409 transitions. [2024-10-12 14:46:55,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-10-12 14:46:55,514 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 229 [2024-10-12 14:46:55,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:46:55,515 INFO L225 Difference]: With dead ends: 300 [2024-10-12 14:46:55,515 INFO L226 Difference]: Without dead ends: 180 [2024-10-12 14:46:55,516 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2024-10-12 14:46:55,517 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:46:55,517 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 128 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:46:55,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-10-12 14:46:55,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2024-10-12 14:46:55,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.2228571428571429) internal successors, (214), 175 states have internal predecessors, (214), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:46:55,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 220 transitions. [2024-10-12 14:46:55,524 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 220 transitions. Word has length 229 [2024-10-12 14:46:55,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:46:55,524 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 220 transitions. [2024-10-12 14:46:55,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-12 14:46:55,524 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 220 transitions. [2024-10-12 14:46:55,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2024-10-12 14:46:55,526 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:46:55,526 INFO L215 NwaCegarLoop]: trace histogram [58, 54, 54, 54, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:46:55,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-12 14:46:55,726 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,SelfDestructingSolverStorable10 [2024-10-12 14:46:55,727 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:46:55,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:46:55,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1749336371, now seen corresponding path program 9 times [2024-10-12 14:46:55,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:46:55,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389680259] [2024-10-12 14:46:55,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:46:55,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:46:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:58,098 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-12 14:46:58,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:58,109 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2024-10-12 14:46:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:58,120 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2024-10-12 14:46:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:46:58,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-12 14:46:58,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:46:58,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389680259] [2024-10-12 14:46:58,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389680259] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:46:58,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454645024] [2024-10-12 14:46:58,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 14:46:58,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:46:58,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:46:58,137 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:46:58,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-12 14:46:58,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-10-12 14:46:58,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:46:58,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-12 14:46:58,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:46:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 2082 proven. 105 refuted. 0 times theorem prover too weak. 4096 trivial. 0 not checked. [2024-10-12 14:46:59,324 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:46:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 6178 trivial. 0 not checked. [2024-10-12 14:46:59,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454645024] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:46:59,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:46:59,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 18, 17] total 92 [2024-10-12 14:46:59,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820724798] [2024-10-12 14:46:59,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:46:59,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-10-12 14:46:59,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:46:59,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-10-12 14:46:59,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2386, Invalid=5986, Unknown=0, NotChecked=0, Total=8372 [2024-10-12 14:46:59,879 INFO L87 Difference]: Start difference. First operand 180 states and 220 transitions. Second operand has 92 states, 92 states have (on average 1.3043478260869565) internal successors, (120), 92 states have internal predecessors, (120), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:46:59,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:46:59,994 INFO L93 Difference]: Finished difference Result 317 states and 413 transitions. [2024-10-12 14:46:59,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-10-12 14:46:59,994 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.3043478260869565) internal successors, (120), 92 states have internal predecessors, (120), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 259 [2024-10-12 14:46:59,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:46:59,995 INFO L225 Difference]: With dead ends: 317 [2024-10-12 14:46:59,995 INFO L226 Difference]: Without dead ends: 197 [2024-10-12 14:46:59,997 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2386, Invalid=5986, Unknown=0, NotChecked=0, Total=8372 [2024-10-12 14:46:59,997 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:46:59,997 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 249 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:46:59,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-10-12 14:47:00,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2024-10-12 14:47:00,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.203125) internal successors, (231), 192 states have internal predecessors, (231), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:47:00,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 237 transitions. [2024-10-12 14:47:00,006 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 237 transitions. Word has length 259 [2024-10-12 14:47:00,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:47:00,006 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 237 transitions. [2024-10-12 14:47:00,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.3043478260869565) internal successors, (120), 92 states have internal predecessors, (120), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:47:00,006 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 237 transitions. [2024-10-12 14:47:00,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2024-10-12 14:47:00,008 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:47:00,008 INFO L215 NwaCegarLoop]: trace histogram [59, 54, 54, 54, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:47:00,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-12 14:47:00,209 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,SelfDestructingSolverStorable11 [2024-10-12 14:47:00,210 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:47:00,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:47:00,210 INFO L85 PathProgramCache]: Analyzing trace with hash 531745919, now seen corresponding path program 10 times [2024-10-12 14:47:00,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:47:00,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452347397] [2024-10-12 14:47:00,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:47:00,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:47:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:47:02,483 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-10-12 14:47:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:47:02,492 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2024-10-12 14:47:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:47:02,500 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2024-10-12 14:47:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:47:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 4932 trivial. 0 not checked. [2024-10-12 14:47:02,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:47:02,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452347397] [2024-10-12 14:47:02,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452347397] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:47:02,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333885484] [2024-10-12 14:47:02,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 14:47:02,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:47:02,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:47:02,513 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:47:02,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-12 14:47:02,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 14:47:02,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:47:02,794 INFO L255 TraceCheckSpWp]: Trace formula consists of 1418 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-12 14:47:02,799 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:47:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 2022 proven. 477 refuted. 0 times theorem prover too weak. 4203 trivial. 0 not checked. [2024-10-12 14:47:03,383 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:47:04,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 2022 proven. 477 refuted. 0 times theorem prover too weak. 4203 trivial. 0 not checked. [2024-10-12 14:47:04,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333885484] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:47:04,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:47:04,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 21, 21] total 100 [2024-10-12 14:47:04,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578994134] [2024-10-12 14:47:04,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:47:04,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2024-10-12 14:47:04,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:47:04,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2024-10-12 14:47:04,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2670, Invalid=7230, Unknown=0, NotChecked=0, Total=9900 [2024-10-12 14:47:04,322 INFO L87 Difference]: Start difference. First operand 197 states and 237 transitions. Second operand has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:47:04,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:47:04,561 INFO L93 Difference]: Finished difference Result 434 states and 577 transitions. [2024-10-12 14:47:04,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-10-12 14:47:04,562 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 276 [2024-10-12 14:47:04,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:47:04,563 INFO L225 Difference]: With dead ends: 434 [2024-10-12 14:47:04,564 INFO L226 Difference]: Without dead ends: 298 [2024-10-12 14:47:04,566 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2242 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2670, Invalid=7230, Unknown=0, NotChecked=0, Total=9900 [2024-10-12 14:47:04,566 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 628 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:47:04,567 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 372 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:47:04,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2024-10-12 14:47:04,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2024-10-12 14:47:04,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.2696245733788396) internal successors, (372), 293 states have internal predecessors, (372), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:47:04,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 378 transitions. [2024-10-12 14:47:04,577 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 378 transitions. Word has length 276 [2024-10-12 14:47:04,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:47:04,577 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 378 transitions. [2024-10-12 14:47:04,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:47:04,577 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 378 transitions. [2024-10-12 14:47:04,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2024-10-12 14:47:04,580 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:47:04,581 INFO L215 NwaCegarLoop]: trace histogram [114, 114, 114, 60, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:47:04,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-12 14:47:04,784 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,SelfDestructingSolverStorable12 [2024-10-12 14:47:04,785 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:47:04,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:47:04,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1307286285, now seen corresponding path program 11 times [2024-10-12 14:47:04,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:47:04,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717639538] [2024-10-12 14:47:04,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:47:04,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:47:04,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:47:07,362 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-12 14:47:07,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:47:07,388 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2024-10-12 14:47:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:47:07,415 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 335 [2024-10-12 14:47:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:47:07,438 INFO L134 CoverageAnalysis]: Checked inductivity of 21972 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 20142 trivial. 0 not checked. [2024-10-12 14:47:07,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:47:07,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717639538] [2024-10-12 14:47:07,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717639538] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:47:07,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254175272] [2024-10-12 14:47:07,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 14:47:07,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:47:07,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:47:07,440 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:47:07,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process