./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/array-cav19/array_init_both_ends_multiple_sum.c --full-output --preprocessor.use.memory.slicer true --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 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 ../../../trunk/examples/svcomp/array-cav19/array_init_both_ends_multiple_sum.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54df2940ae4d13c219208dbc33c051105041923e87e99fc1d1620ede83e75392 --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 18:11:49,520 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 18:11:49,598 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 18:11:49,604 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 18:11:49,604 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 18:11:49,627 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 18:11:49,627 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 18:11:49,628 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 18:11:49,628 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 18:11:49,631 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 18:11:49,631 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 18:11:49,632 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 18:11:49,633 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 18:11:49,634 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 18:11:49,634 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 18:11:49,634 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 18:11:49,634 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 18:11:49,634 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 18:11:49,635 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 18:11:49,635 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 18:11:49,635 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 18:11:49,635 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 18:11:49,636 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 18:11:49,636 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 18:11:49,636 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 18:11:49,636 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 18:11:49,636 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 18:11:49,637 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 18:11:49,637 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 18:11:49,637 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 18:11:49,638 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 18:11:49,638 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 18:11:49,638 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 18:11:49,638 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 18:11:49,639 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 18:11:49,639 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 18:11:49,639 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 18:11:49,639 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 18:11:49,639 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 18:11:49,639 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 18:11:49,640 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 18:11:49,640 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 18:11:49,640 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54df2940ae4d13c219208dbc33c051105041923e87e99fc1d1620ede83e75392 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-22 18:11:49,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 18:11:49,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 18:11:49,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 18:11:49,911 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 18:11:49,912 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 18:11:49,913 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_init_both_ends_multiple_sum.c [2023-11-22 18:11:50,959 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 18:11:51,085 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 18:11:51,086 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_init_both_ends_multiple_sum.c [2023-11-22 18:11:51,094 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a96ed17c8/5f581c2f78e5406da617675e54b022b0/FLAG623e1f360 [2023-11-22 18:11:51,106 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a96ed17c8/5f581c2f78e5406da617675e54b022b0 [2023-11-22 18:11:51,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 18:11:51,109 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 18:11:51,111 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 18:11:51,111 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 18:11:51,114 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 18:11:51,115 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:11:51" (1/1) ... [2023-11-22 18:11:51,115 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46449fa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:51, skipping insertion in model container [2023-11-22 18:11:51,115 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:11:51" (1/1) ... [2023-11-22 18:11:51,133 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 18:11:51,260 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_init_both_ends_multiple_sum.c[424,437] [2023-11-22 18:11:51,273 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 18:11:51,279 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 18:11:51,287 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_init_both_ends_multiple_sum.c[424,437] [2023-11-22 18:11:51,297 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 18:11:51,307 INFO L206 MainTranslator]: Completed translation [2023-11-22 18:11:51,310 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:51 WrapperNode [2023-11-22 18:11:51,310 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 18:11:51,311 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 18:11:51,311 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 18:11:51,311 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 18:11:51,316 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:51" (1/1) ... [2023-11-22 18:11:51,320 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:51" (1/1) ... [2023-11-22 18:11:51,331 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2023-11-22 18:11:51,331 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 18:11:51,332 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 18:11:51,332 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 18:11:51,332 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 18:11:51,338 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:51" (1/1) ... [2023-11-22 18:11:51,338 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:51" (1/1) ... [2023-11-22 18:11:51,339 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:51" (1/1) ... [2023-11-22 18:11:51,345 INFO L189 HeapSplitter]: Split 6 memory accesses to 3 slices as follows [2, 2, 2] [2023-11-22 18:11:51,345 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:51" (1/1) ... [2023-11-22 18:11:51,345 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:51" (1/1) ... [2023-11-22 18:11:51,356 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:51" (1/1) ... [2023-11-22 18:11:51,358 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:51" (1/1) ... [2023-11-22 18:11:51,359 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:51" (1/1) ... [2023-11-22 18:11:51,360 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:51" (1/1) ... [2023-11-22 18:11:51,361 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 18:11:51,361 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 18:11:51,362 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 18:11:51,362 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 18:11:51,362 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:51" (1/1) ... [2023-11-22 18:11:51,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 18:11:51,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:11:51,397 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 18:11:51,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 18:11:51,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 18:11:51,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 18:11:51,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-22 18:11:51,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-22 18:11:51,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 18:11:51,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-22 18:11:51,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-22 18:11:51,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-22 18:11:51,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 18:11:51,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 18:11:51,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-22 18:11:51,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-22 18:11:51,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-22 18:11:51,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 18:11:51,480 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 18:11:51,481 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 18:11:51,568 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 18:11:51,589 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 18:11:51,589 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-22 18:11:51,590 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:11:51 BoogieIcfgContainer [2023-11-22 18:11:51,590 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 18:11:51,591 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 18:11:51,591 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 18:11:51,594 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 18:11:51,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 06:11:51" (1/3) ... [2023-11-22 18:11:51,594 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c774a76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:11:51, skipping insertion in model container [2023-11-22 18:11:51,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:51" (2/3) ... [2023-11-22 18:11:51,595 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c774a76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:11:51, skipping insertion in model container [2023-11-22 18:11:51,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:11:51" (3/3) ... [2023-11-22 18:11:51,596 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_both_ends_multiple_sum.c [2023-11-22 18:11:51,611 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 18:11:51,611 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 18:11:51,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 18:11:51,643 INFO L357 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, mHoare=true, 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;@3c638b61, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 18:11:51,643 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 18:11:51,646 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:51,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-22 18:11:51,650 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:11:51,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:11:51,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:11:51,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:11:51,654 INFO L85 PathProgramCache]: Analyzing trace with hash -725710700, now seen corresponding path program 1 times [2023-11-22 18:11:51,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:11:51,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115474628] [2023-11-22 18:11:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:11:51,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:11:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:11:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:11:51,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:11:51,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115474628] [2023-11-22 18:11:51,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115474628] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:11:51,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:11:51,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 18:11:51,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948319346] [2023-11-22 18:11:51,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:11:51,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 18:11:51,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:11:51,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 18:11:51,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 18:11:51,965 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:51,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:11:51,989 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2023-11-22 18:11:51,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 18:11:51,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-22 18:11:51,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:11:52,003 INFO L225 Difference]: With dead ends: 23 [2023-11-22 18:11:52,003 INFO L226 Difference]: Without dead ends: 11 [2023-11-22 18:11:52,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 18:11:52,007 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:11:52,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:11:52,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-22 18:11:52,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-22 18:11:52,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2023-11-22 18:11:52,028 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 9 [2023-11-22 18:11:52,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:11:52,028 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-11-22 18:11:52,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:52,029 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2023-11-22 18:11:52,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-22 18:11:52,029 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:11:52,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:11:52,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 18:11:52,030 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:11:52,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:11:52,030 INFO L85 PathProgramCache]: Analyzing trace with hash 324573279, now seen corresponding path program 1 times [2023-11-22 18:11:52,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:11:52,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853732862] [2023-11-22 18:11:52,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:11:52,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:11:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:11:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:11:52,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:11:52,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853732862] [2023-11-22 18:11:52,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853732862] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:11:52,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:11:52,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 18:11:52,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472728446] [2023-11-22 18:11:52,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:11:52,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 18:11:52,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:11:52,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 18:11:52,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-22 18:11:52,098 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:52,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:11:52,124 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2023-11-22 18:11:52,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 18:11:52,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-22 18:11:52,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:11:52,125 INFO L225 Difference]: With dead ends: 19 [2023-11-22 18:11:52,125 INFO L226 Difference]: Without dead ends: 13 [2023-11-22 18:11:52,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-22 18:11:52,129 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:11:52,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 8 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:11:52,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-22 18:11:52,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-22 18:11:52,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:52,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-11-22 18:11:52,136 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2023-11-22 18:11:52,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:11:52,137 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-11-22 18:11:52,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:52,137 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-11-22 18:11:52,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-22 18:11:52,138 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:11:52,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:11:52,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 18:11:52,138 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:11:52,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:11:52,140 INFO L85 PathProgramCache]: Analyzing trace with hash 708744270, now seen corresponding path program 1 times [2023-11-22 18:11:52,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:11:52,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454215882] [2023-11-22 18:11:52,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:11:52,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:11:52,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:11:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:11:52,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:11:52,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454215882] [2023-11-22 18:11:52,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454215882] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:11:52,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014943934] [2023-11-22 18:11:52,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:11:52,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:11:52,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:11:52,241 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) [2023-11-22 18:11:52,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 18:11:52,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:11:52,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-22 18:11:52,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:11:52,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:11:52,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:11:52,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:11:52,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014943934] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:11:52,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:11:52,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-22 18:11:52,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992695329] [2023-11-22 18:11:52,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:11:52,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 18:11:52,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:11:52,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 18:11:52,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-22 18:11:52,375 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:52,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:11:52,409 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2023-11-22 18:11:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 18:11:52,410 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-22 18:11:52,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:11:52,410 INFO L225 Difference]: With dead ends: 26 [2023-11-22 18:11:52,410 INFO L226 Difference]: Without dead ends: 16 [2023-11-22 18:11:52,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-22 18:11:52,412 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:11:52,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:11:52,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-22 18:11:52,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-22 18:11:52,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:52,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-11-22 18:11:52,419 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2023-11-22 18:11:52,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:11:52,420 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-11-22 18:11:52,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:52,420 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-11-22 18:11:52,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-22 18:11:52,421 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:11:52,421 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:11:52,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-22 18:11:52,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:11:52,632 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:11:52,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:11:52,633 INFO L85 PathProgramCache]: Analyzing trace with hash 964212227, now seen corresponding path program 2 times [2023-11-22 18:11:52,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:11:52,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37444073] [2023-11-22 18:11:52,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:11:52,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:11:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:11:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:11:52,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:11:52,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37444073] [2023-11-22 18:11:52,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37444073] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:11:52,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091347236] [2023-11-22 18:11:52,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:11:52,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:11:52,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:11:52,800 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) [2023-11-22 18:11:52,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 18:11:52,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:11:52,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:11:52,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-22 18:11:52,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:11:52,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:11:52,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:11:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:11:52,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091347236] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:11:52,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:11:52,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-22 18:11:52,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527146012] [2023-11-22 18:11:52,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:11:52,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-22 18:11:52,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:11:52,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-22 18:11:52,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=142, Unknown=0, NotChecked=0, Total=272 [2023-11-22 18:11:52,990 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:53,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:11:53,039 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2023-11-22 18:11:53,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-22 18:11:53,040 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-22 18:11:53,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:11:53,040 INFO L225 Difference]: With dead ends: 32 [2023-11-22 18:11:53,040 INFO L226 Difference]: Without dead ends: 22 [2023-11-22 18:11:53,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=142, Unknown=0, NotChecked=0, Total=272 [2023-11-22 18:11:53,043 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:11:53,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:11:53,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-22 18:11:53,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-22 18:11:53,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:53,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-11-22 18:11:53,051 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2023-11-22 18:11:53,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:11:53,051 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-11-22 18:11:53,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:53,052 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-11-22 18:11:53,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-22 18:11:53,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:11:53,054 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:11:53,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 18:11:53,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-22 18:11:53,265 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:11:53,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:11:53,266 INFO L85 PathProgramCache]: Analyzing trace with hash -2022276573, now seen corresponding path program 3 times [2023-11-22 18:11:53,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:11:53,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25121387] [2023-11-22 18:11:53,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:11:53,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:11:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:11:53,441 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-22 18:11:53,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:11:53,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25121387] [2023-11-22 18:11:53,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25121387] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:11:53,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209014971] [2023-11-22 18:11:53,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:11:53,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:11:53,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:11:53,453 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) [2023-11-22 18:11:53,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 18:11:53,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-22 18:11:53,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:11:53,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-22 18:11:53,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:11:53,529 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-22 18:11:53,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:11:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-22 18:11:53,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209014971] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:11:53,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:11:53,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-22 18:11:53,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050916120] [2023-11-22 18:11:53,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:11:53,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-22 18:11:53,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:11:53,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-22 18:11:53,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2023-11-22 18:11:53,558 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:53,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:11:53,594 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2023-11-22 18:11:53,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 18:11:53,595 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-22 18:11:53,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:11:53,595 INFO L225 Difference]: With dead ends: 35 [2023-11-22 18:11:53,595 INFO L226 Difference]: Without dead ends: 28 [2023-11-22 18:11:53,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2023-11-22 18:11:53,596 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:11:53,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 14 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:11:53,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-22 18:11:53,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-22 18:11:53,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:53,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-11-22 18:11:53,600 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2023-11-22 18:11:53,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:11:53,600 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-11-22 18:11:53,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:53,600 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-11-22 18:11:53,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-22 18:11:53,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:11:53,601 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:11:53,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 18:11:53,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:11:53,812 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:11:53,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:11:53,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1460225996, now seen corresponding path program 4 times [2023-11-22 18:11:53,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:11:53,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310169956] [2023-11-22 18:11:53,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:11:53,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:11:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:11:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-22 18:11:53,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:11:53,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310169956] [2023-11-22 18:11:53,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310169956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:11:53,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859623891] [2023-11-22 18:11:53,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:11:53,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:11:53,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:11:53,914 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) [2023-11-22 18:11:53,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 18:11:54,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:11:54,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:11:54,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-22 18:11:54,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:11:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-22 18:11:54,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:11:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-22 18:11:54,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859623891] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:11:54,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:11:54,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-22 18:11:54,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859836608] [2023-11-22 18:11:54,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:11:54,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 18:11:54,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:11:54,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 18:11:54,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2023-11-22 18:11:54,215 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:54,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:11:54,309 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2023-11-22 18:11:54,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-22 18:11:54,310 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-22 18:11:54,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:11:54,310 INFO L225 Difference]: With dead ends: 50 [2023-11-22 18:11:54,310 INFO L226 Difference]: Without dead ends: 40 [2023-11-22 18:11:54,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2023-11-22 18:11:54,311 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:11:54,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 14 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:11:54,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-22 18:11:54,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-22 18:11:54,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:54,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2023-11-22 18:11:54,331 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 27 [2023-11-22 18:11:54,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:11:54,331 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2023-11-22 18:11:54,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:54,332 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2023-11-22 18:11:54,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-22 18:11:54,332 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:11:54,332 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:11:54,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 18:11:54,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:11:54,544 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:11:54,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:11:54,545 INFO L85 PathProgramCache]: Analyzing trace with hash -759122604, now seen corresponding path program 5 times [2023-11-22 18:11:54,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:11:54,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901038940] [2023-11-22 18:11:54,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:11:54,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:11:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:11:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-22 18:11:54,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:11:54,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901038940] [2023-11-22 18:11:54,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901038940] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:11:54,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586950149] [2023-11-22 18:11:54,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:11:54,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:11:54,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:11:54,774 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) [2023-11-22 18:11:54,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 18:11:55,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-22 18:11:55,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:11:55,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-22 18:11:55,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:11:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-22 18:11:55,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:11:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-22 18:11:56,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586950149] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:11:56,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:11:56,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2023-11-22 18:11:56,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244319368] [2023-11-22 18:11:56,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:11:56,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-22 18:11:56,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:11:56,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-22 18:11:56,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=753, Unknown=0, NotChecked=0, Total=1332 [2023-11-22 18:11:56,026 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 36 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:56,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:11:56,340 INFO L93 Difference]: Finished difference Result 104 states and 143 transitions. [2023-11-22 18:11:56,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-22 18:11:56,340 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 36 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-22 18:11:56,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:11:56,341 INFO L225 Difference]: With dead ends: 104 [2023-11-22 18:11:56,341 INFO L226 Difference]: Without dead ends: 76 [2023-11-22 18:11:56,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=876, Invalid=1380, Unknown=0, NotChecked=0, Total=2256 [2023-11-22 18:11:56,342 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:11:56,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 26 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:11:56,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-22 18:11:56,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-11-22 18:11:56,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:56,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2023-11-22 18:11:56,351 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 39 [2023-11-22 18:11:56,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:11:56,351 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2023-11-22 18:11:56,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 36 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:56,351 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2023-11-22 18:11:56,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-22 18:11:56,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:11:56,353 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:11:56,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-22 18:11:56,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:11:56,566 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:11:56,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:11:56,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1720469460, now seen corresponding path program 6 times [2023-11-22 18:11:56,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:11:56,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117331871] [2023-11-22 18:11:56,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:11:56,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:11:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:11:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-11-22 18:11:57,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:11:57,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117331871] [2023-11-22 18:11:57,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117331871] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:11:57,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617225657] [2023-11-22 18:11:57,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 18:11:57,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:11:57,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:11:57,149 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) [2023-11-22 18:11:57,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-22 18:12:10,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-11-22 18:12:10,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:12:10,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-22 18:12:10,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:12:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-11-22 18:12:10,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:12:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-11-22 18:12:10,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617225657] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:12:10,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:12:10,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 71 [2023-11-22 18:12:10,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605041840] [2023-11-22 18:12:10,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:12:10,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-11-22 18:12:10,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:12:10,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-11-22 18:12:10,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2832, Unknown=0, NotChecked=0, Total=5112 [2023-11-22 18:12:10,885 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 72 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 71 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:12:11,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:12:11,709 INFO L93 Difference]: Finished difference Result 200 states and 275 transitions. [2023-11-22 18:12:11,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-22 18:12:11,710 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 71 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-11-22 18:12:11,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:12:11,714 INFO L225 Difference]: With dead ends: 200 [2023-11-22 18:12:11,714 INFO L226 Difference]: Without dead ends: 148 [2023-11-22 18:12:11,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3103 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3430, Invalid=5500, Unknown=0, NotChecked=0, Total=8930 [2023-11-22 18:12:11,718 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 18:12:11,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 20 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 18:12:11,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-22 18:12:11,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2023-11-22 18:12:11,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0204081632653061) internal successors, (150), 147 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:12:11,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2023-11-22 18:12:11,743 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 75 [2023-11-22 18:12:11,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:12:11,744 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2023-11-22 18:12:11,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 71 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:12:11,744 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2023-11-22 18:12:11,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-11-22 18:12:11,749 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:12:11,749 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:12:11,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-22 18:12:11,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:12:11,969 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:12:11,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:12:11,970 INFO L85 PathProgramCache]: Analyzing trace with hash -593482540, now seen corresponding path program 7 times [2023-11-22 18:12:11,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:12:11,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394481108] [2023-11-22 18:12:11,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:12:11,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:12:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:12:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2023-11-22 18:12:14,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:12:14,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394481108] [2023-11-22 18:12:14,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394481108] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:12:14,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725704856] [2023-11-22 18:12:14,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 18:12:14,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:12:14,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:12:14,019 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) [2023-11-22 18:12:14,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-22 18:12:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:12:14,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-22 18:12:14,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:12:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2023-11-22 18:12:15,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:12:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2023-11-22 18:12:17,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725704856] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:12:17,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:12:17,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 143 [2023-11-22 18:12:17,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726332923] [2023-11-22 18:12:17,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:12:17,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2023-11-22 18:12:17,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:12:17,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2023-11-22 18:12:17,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9168, Invalid=11424, Unknown=0, NotChecked=0, Total=20592 [2023-11-22 18:12:17,838 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand has 144 states, 144 states have (on average 1.1041666666666667) internal successors, (159), 143 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:12:20,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:12:20,940 INFO L93 Difference]: Finished difference Result 392 states and 539 transitions. [2023-11-22 18:12:20,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-11-22 18:12:20,941 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 1.1041666666666667) internal successors, (159), 143 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2023-11-22 18:12:20,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:12:20,942 INFO L225 Difference]: With dead ends: 392 [2023-11-22 18:12:20,942 INFO L226 Difference]: Without dead ends: 292 [2023-11-22 18:12:20,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13111 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=13774, Invalid=22516, Unknown=0, NotChecked=0, Total=36290 [2023-11-22 18:12:20,947 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 55 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 817 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 817 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-22 18:12:20,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 32 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [817 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-22 18:12:20,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2023-11-22 18:12:20,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2023-11-22 18:12:20,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.0103092783505154) internal successors, (294), 291 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:12:20,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 294 transitions. [2023-11-22 18:12:20,984 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 294 transitions. Word has length 147 [2023-11-22 18:12:20,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:12:20,984 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 294 transitions. [2023-11-22 18:12:20,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 1.1041666666666667) internal successors, (159), 143 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:12:20,985 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 294 transitions. [2023-11-22 18:12:20,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2023-11-22 18:12:20,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:12:20,987 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:12:20,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-22 18:12:21,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:12:21,198 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:12:21,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:12:21,199 INFO L85 PathProgramCache]: Analyzing trace with hash -692390188, now seen corresponding path program 8 times [2023-11-22 18:12:21,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:12:21,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144551733] [2023-11-22 18:12:21,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:12:21,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:12:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:12:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 8930 trivial. 0 not checked. [2023-11-22 18:12:26,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:12:26,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144551733] [2023-11-22 18:12:26,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144551733] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:12:26,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072091642] [2023-11-22 18:12:26,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:12:26,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:12:26,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:12:26,930 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) [2023-11-22 18:12:26,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-22 18:12:27,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:12:27,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:12:27,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 1849 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-22 18:12:27,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:12:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 8930 trivial. 0 not checked. [2023-11-22 18:12:30,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:12:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 8930 trivial. 0 not checked. [2023-11-22 18:12:37,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072091642] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:12:37,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:12:37,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 96] total 287 [2023-11-22 18:12:37,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841617579] [2023-11-22 18:12:37,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:12:37,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 288 states [2023-11-22 18:12:37,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:12:37,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 288 interpolants. [2023-11-22 18:12:37,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36768, Invalid=45888, Unknown=0, NotChecked=0, Total=82656 [2023-11-22 18:12:37,212 INFO L87 Difference]: Start difference. First operand 292 states and 294 transitions. Second operand has 288 states, 288 states have (on average 1.0520833333333333) internal successors, (303), 287 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:12:53,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:12:53,816 INFO L93 Difference]: Finished difference Result 776 states and 1067 transitions. [2023-11-22 18:12:53,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2023-11-22 18:12:53,819 INFO L78 Accepts]: Start accepts. Automaton has has 288 states, 288 states have (on average 1.0520833333333333) internal successors, (303), 287 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 291 [2023-11-22 18:12:53,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:12:53,826 INFO L225 Difference]: With dead ends: 776 [2023-11-22 18:12:53,827 INFO L226 Difference]: Without dead ends: 580 [2023-11-22 18:12:53,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 381 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53863 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=55198, Invalid=91108, Unknown=0, NotChecked=0, Total=146306 [2023-11-22 18:12:53,852 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 102 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 1982 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 2709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1982 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:12:53,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 26 Invalid, 2709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1982 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-22 18:12:53,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2023-11-22 18:12:53,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2023-11-22 18:12:53,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 1.005181347150259) internal successors, (582), 579 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:12:53,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 582 transitions. [2023-11-22 18:12:53,918 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 582 transitions. Word has length 291 [2023-11-22 18:12:53,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:12:53,918 INFO L495 AbstractCegarLoop]: Abstraction has 580 states and 582 transitions. [2023-11-22 18:12:53,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 288 states, 288 states have (on average 1.0520833333333333) internal successors, (303), 287 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:12:53,919 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 582 transitions. [2023-11-22 18:12:53,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2023-11-22 18:12:53,926 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:12:53,926 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:12:53,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-22 18:12:54,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-22 18:12:54,139 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:12:54,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:12:54,140 INFO L85 PathProgramCache]: Analyzing trace with hash 582781652, now seen corresponding path program 9 times [2023-11-22 18:12:54,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:12:54,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73400771] [2023-11-22 18:12:54,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:12:54,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:12:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:13:16,745 INFO L134 CoverageAnalysis]: Checked inductivity of 54435 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 36290 trivial. 0 not checked. [2023-11-22 18:13:16,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:13:16,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73400771] [2023-11-22 18:13:16,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73400771] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:13:16,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914221555] [2023-11-22 18:13:16,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:13:16,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:13:16,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:13:16,748 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) [2023-11-22 18:13:16,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process Killed by 15