./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/array-cav19/array_init_var_plus_ind3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c4f91361 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_var_plus_ind3.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 d03532f6674c1e8789842ed1d67090f7bce36756d61994a67b8c2e5e0b23351f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-c4f9136-m [2023-11-23 14:37:47,227 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 14:37:47,312 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 14:37:47,316 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 14:37:47,317 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 14:37:47,345 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 14:37:47,345 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 14:37:47,346 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 14:37:47,347 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 14:37:47,348 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 14:37:47,349 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 14:37:47,349 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 14:37:47,350 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 14:37:47,350 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 14:37:47,351 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 14:37:47,351 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 14:37:47,351 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 14:37:47,351 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 14:37:47,352 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 14:37:47,352 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 14:37:47,353 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 14:37:47,353 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 14:37:47,353 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 14:37:47,353 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 14:37:47,354 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 14:37:47,354 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 14:37:47,354 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 14:37:47,355 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 14:37:47,355 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 14:37:47,355 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 14:37:47,356 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 14:37:47,356 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 14:37:47,357 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 14:37:47,357 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 14:37:47,357 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 14:37:47,357 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 14:37:47,357 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 14:37:47,358 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 14:37:47,358 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 14:37:47,358 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 14:37:47,358 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 14:37:47,358 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 14:37:47,359 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d03532f6674c1e8789842ed1d67090f7bce36756d61994a67b8c2e5e0b23351f [2023-11-23 14:37:47,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 14:37:47,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 14:37:47,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 14:37:47,687 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 14:37:47,687 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 14:37:47,688 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_init_var_plus_ind3.c [2023-11-23 14:37:48,805 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 14:37:48,995 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 14:37:48,996 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_init_var_plus_ind3.c [2023-11-23 14:37:49,002 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/038931ce7/12fdc3a1db4c4127b3e6537a181cbb36/FLAG4be29c1e0 [2023-11-23 14:37:49,014 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/038931ce7/12fdc3a1db4c4127b3e6537a181cbb36 [2023-11-23 14:37:49,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 14:37:49,018 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 14:37:49,019 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 14:37:49,019 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 14:37:49,024 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 14:37:49,025 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:37:49" (1/1) ... [2023-11-23 14:37:49,026 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21abae8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:49, skipping insertion in model container [2023-11-23 14:37:49,026 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:37:49" (1/1) ... [2023-11-23 14:37:49,043 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 14:37:49,158 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_var_plus_ind3.c[415,428] [2023-11-23 14:37:49,170 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 14:37:49,178 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 14:37:49,187 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_var_plus_ind3.c[415,428] [2023-11-23 14:37:49,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 14:37:49,203 INFO L206 MainTranslator]: Completed translation [2023-11-23 14:37:49,204 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:49 WrapperNode [2023-11-23 14:37:49,204 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 14:37:49,205 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 14:37:49,205 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 14:37:49,205 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 14:37:49,210 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:49" (1/1) ... [2023-11-23 14:37:49,216 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:49" (1/1) ... [2023-11-23 14:37:49,229 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2023-11-23 14:37:49,230 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 14:37:49,231 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 14:37:49,231 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 14:37:49,231 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 14:37:49,238 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:49" (1/1) ... [2023-11-23 14:37:49,239 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:49" (1/1) ... [2023-11-23 14:37:49,240 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:49" (1/1) ... [2023-11-23 14:37:49,250 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-11-23 14:37:49,251 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:49" (1/1) ... [2023-11-23 14:37:49,251 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:49" (1/1) ... [2023-11-23 14:37:49,254 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:49" (1/1) ... [2023-11-23 14:37:49,257 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:49" (1/1) ... [2023-11-23 14:37:49,258 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:49" (1/1) ... [2023-11-23 14:37:49,259 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:49" (1/1) ... [2023-11-23 14:37:49,260 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 14:37:49,261 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 14:37:49,261 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 14:37:49,261 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 14:37:49,262 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:49" (1/1) ... [2023-11-23 14:37:49,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 14:37:49,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:37:49,286 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) [2023-11-23 14:37:49,292 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 [2023-11-23 14:37:49,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 14:37:49,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 14:37:49,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 14:37:49,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 14:37:49,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 14:37:49,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 14:37:49,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 14:37:49,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 14:37:49,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 14:37:49,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 14:37:49,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 14:37:49,385 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 14:37:49,387 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 14:37:49,525 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 14:37:49,581 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 14:37:49,581 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 14:37:49,581 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:37:49 BoogieIcfgContainer [2023-11-23 14:37:49,582 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 14:37:49,585 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 14:37:49,585 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 14:37:49,589 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 14:37:49,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:37:49" (1/3) ... [2023-11-23 14:37:49,592 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16fd84d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:37:49, skipping insertion in model container [2023-11-23 14:37:49,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:37:49" (2/3) ... [2023-11-23 14:37:49,592 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16fd84d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:37:49, skipping insertion in model container [2023-11-23 14:37:49,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:37:49" (3/3) ... [2023-11-23 14:37:49,594 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind3.c [2023-11-23 14:37:49,608 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 14:37:49,609 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 14:37:49,640 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 14:37:49,645 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;@76c7d9d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 14:37:49,646 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 14:37:49,648 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 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) [2023-11-23 14:37:49,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-23 14:37:49,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:37:49,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 14:37:49,653 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:37:49,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:37:49,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1929175509, now seen corresponding path program 1 times [2023-11-23 14:37:49,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:37:49,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736285961] [2023-11-23 14:37:49,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:37:49,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:37:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:37:49,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:49,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:37:49,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736285961] [2023-11-23 14:37:49,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736285961] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:37:49,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:37:49,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 14:37:49,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484203796] [2023-11-23 14:37:49,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:37:49,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 14:37:49,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:37:49,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 14:37:49,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 14:37:49,828 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2023-11-23 14:37:49,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:37:49,848 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2023-11-23 14:37:49,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 14:37:49,858 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2023-11-23 14:37:49,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:37:49,865 INFO L225 Difference]: With dead ends: 19 [2023-11-23 14:37:49,865 INFO L226 Difference]: Without dead ends: 9 [2023-11-23 14:37:49,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 14:37:49,874 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:37:49,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 14:37:49,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-11-23 14:37:49,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-11-23 14:37:49,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 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) [2023-11-23 14:37:49,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2023-11-23 14:37:49,906 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2023-11-23 14:37:49,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:37:49,906 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2023-11-23 14:37:49,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2023-11-23 14:37:49,907 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2023-11-23 14:37:49,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-23 14:37:49,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:37:49,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 14:37:49,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 14:37:49,908 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:37:49,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:37:49,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1939334240, now seen corresponding path program 1 times [2023-11-23 14:37:49,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:37:49,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16704838] [2023-11-23 14:37:49,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:37:49,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:37:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:37:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:50,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:37:50,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16704838] [2023-11-23 14:37:50,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16704838] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:37:50,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:37:50,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 14:37:50,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673205162] [2023-11-23 14:37:50,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:37:50,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 14:37:50,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:37:50,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 14:37:50,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 14:37:50,078 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2023-11-23 14:37:50,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:37:50,111 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2023-11-23 14:37:50,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 14:37:50,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2023-11-23 14:37:50,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:37:50,113 INFO L225 Difference]: With dead ends: 23 [2023-11-23 14:37:50,114 INFO L226 Difference]: Without dead ends: 17 [2023-11-23 14:37:50,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 14:37:50,115 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:37:50,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 11 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 14:37:50,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-23 14:37:50,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 10. [2023-11-23 14:37:50,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:37:50,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2023-11-23 14:37:50,123 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2023-11-23 14:37:50,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:37:50,123 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2023-11-23 14:37:50,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2023-11-23 14:37:50,124 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2023-11-23 14:37:50,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 14:37:50,125 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:37:50,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:37:50,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 14:37:50,126 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:37:50,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:37:50,127 INFO L85 PathProgramCache]: Analyzing trace with hash 59809599, now seen corresponding path program 1 times [2023-11-23 14:37:50,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:37:50,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523398674] [2023-11-23 14:37:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:37:50,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:37:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:37:50,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:50,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:37:50,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523398674] [2023-11-23 14:37:50,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523398674] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:37:50,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:37:50,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 14:37:50,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657348423] [2023-11-23 14:37:50,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:37:50,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 14:37:50,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:37:50,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 14:37:50,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 14:37:50,253 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-11-23 14:37:50,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:37:50,288 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2023-11-23 14:37:50,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 14:37:50,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2023-11-23 14:37:50,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:37:50,291 INFO L225 Difference]: With dead ends: 18 [2023-11-23 14:37:50,291 INFO L226 Difference]: Without dead ends: 11 [2023-11-23 14:37:50,291 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 [2023-11-23 14:37:50,292 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:37:50,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 14:37:50,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-23 14:37:50,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-23 14:37:50,300 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) [2023-11-23 14:37:50,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2023-11-23 14:37:50,300 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2023-11-23 14:37:50,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:37:50,301 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-11-23 14:37:50,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-11-23 14:37:50,301 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2023-11-23 14:37:50,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 14:37:50,303 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:37:50,303 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:37:50,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 14:37:50,303 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:37:50,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:37:50,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1422467303, now seen corresponding path program 1 times [2023-11-23 14:37:50,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:37:50,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629158894] [2023-11-23 14:37:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:37:50,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:37:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:37:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:50,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:37:50,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629158894] [2023-11-23 14:37:50,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629158894] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:37:50,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229729000] [2023-11-23 14:37:50,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:37:50,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:37:50,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:37:50,378 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) [2023-11-23 14:37:50,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 14:37:50,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:37:50,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 14:37:50,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:37:50,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:50,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:37:50,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:50,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229729000] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:37:50,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:37:50,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-11-23 14:37:50,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949664325] [2023-11-23 14:37:50,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:37:50,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 14:37:50,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:37:50,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 14:37:50,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-23 14:37:50,560 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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) [2023-11-23 14:37:50,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:37:50,633 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2023-11-23 14:37:50,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 14:37:50,634 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 8 [2023-11-23 14:37:50,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:37:50,636 INFO L225 Difference]: With dead ends: 36 [2023-11-23 14:37:50,636 INFO L226 Difference]: Without dead ends: 28 [2023-11-23 14:37:50,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-11-23 14:37:50,647 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:37:50,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 31 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 14:37:50,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-23 14:37:50,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 16. [2023-11-23 14:37:50,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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) [2023-11-23 14:37:50,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-11-23 14:37:50,655 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2023-11-23 14:37:50,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:37:50,655 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-11-23 14:37:50,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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) [2023-11-23 14:37:50,655 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-11-23 14:37:50,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 14:37:50,657 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:37:50,658 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2023-11-23 14:37:50,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 14:37:50,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:37:50,869 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:37:50,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:37:50,870 INFO L85 PathProgramCache]: Analyzing trace with hash -572020531, now seen corresponding path program 1 times [2023-11-23 14:37:50,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:37:50,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212820179] [2023-11-23 14:37:50,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:37:50,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:37:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:37:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:50,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:37:50,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212820179] [2023-11-23 14:37:50,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212820179] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:37:50,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582427425] [2023-11-23 14:37:50,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:37:50,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:37:50,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:37:51,001 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) [2023-11-23 14:37:51,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 14:37:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:37:51,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 14:37:51,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:37:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:51,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:37:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:51,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582427425] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:37:51,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:37:51,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-23 14:37:51,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423946295] [2023-11-23 14:37:51,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:37:51,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 14:37:51,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:37:51,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 14:37:51,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-23 14:37:51,163 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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) [2023-11-23 14:37:51,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:37:51,220 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2023-11-23 14:37:51,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 14:37:51,221 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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) Word has length 11 [2023-11-23 14:37:51,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:37:51,222 INFO L225 Difference]: With dead ends: 30 [2023-11-23 14:37:51,222 INFO L226 Difference]: Without dead ends: 19 [2023-11-23 14:37:51,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-11-23 14:37:51,223 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:37:51,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 29 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 14:37:51,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-23 14:37:51,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-23 14:37:51,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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) [2023-11-23 14:37:51,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-11-23 14:37:51,227 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 11 [2023-11-23 14:37:51,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:37:51,227 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-11-23 14:37:51,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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) [2023-11-23 14:37:51,228 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-11-23 14:37:51,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 14:37:51,228 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:37:51,228 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-11-23 14:37:51,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 14:37:51,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:37:51,444 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:37:51,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:37:51,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1840760445, now seen corresponding path program 2 times [2023-11-23 14:37:51,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:37:51,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245707407] [2023-11-23 14:37:51,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:37:51,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:37:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:37:51,590 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:51,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:37:51,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245707407] [2023-11-23 14:37:51,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245707407] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:37:51,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003824156] [2023-11-23 14:37:51,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 14:37:51,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:37:51,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:37:51,592 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) [2023-11-23 14:37:51,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 14:37:51,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 14:37:51,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:37:51,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 14:37:51,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:37:51,742 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:51,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:37:51,816 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:51,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003824156] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:37:51,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:37:51,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-23 14:37:51,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134154792] [2023-11-23 14:37:51,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:37:51,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 14:37:51,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:37:51,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 14:37:51,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=200, Unknown=0, NotChecked=0, Total=380 [2023-11-23 14:37:51,819 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 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) [2023-11-23 14:37:51,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:37:51,878 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2023-11-23 14:37:51,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 14:37:51,879 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 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 16 [2023-11-23 14:37:51,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:37:51,880 INFO L225 Difference]: With dead ends: 80 [2023-11-23 14:37:51,880 INFO L226 Difference]: Without dead ends: 74 [2023-11-23 14:37:51,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=180, Invalid=200, Unknown=0, NotChecked=0, Total=380 [2023-11-23 14:37:51,881 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 108 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:37:51,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 55 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 14:37:51,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-23 14:37:51,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 32. [2023-11-23 14:37:51,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 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) [2023-11-23 14:37:51,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-11-23 14:37:51,887 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 16 [2023-11-23 14:37:51,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:37:51,887 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-11-23 14:37:51,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 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) [2023-11-23 14:37:51,888 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-11-23 14:37:51,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 14:37:51,888 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:37:51,888 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1] [2023-11-23 14:37:51,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 14:37:52,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:37:52,104 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:37:52,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:37:52,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1278627842, now seen corresponding path program 2 times [2023-11-23 14:37:52,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:37:52,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629788321] [2023-11-23 14:37:52,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:37:52,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:37:52,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:37:52,419 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:52,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:37:52,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629788321] [2023-11-23 14:37:52,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629788321] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:37:52,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466674037] [2023-11-23 14:37:52,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 14:37:52,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:37:52,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:37:52,421 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) [2023-11-23 14:37:52,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 14:37:52,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 14:37:52,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:37:52,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-23 14:37:52,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:37:52,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 14:37:52,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-23 14:37:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:52,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:37:52,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-23 14:37:52,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-23 14:37:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:52,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466674037] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:37:52,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:37:52,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-23 14:37:52,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974543246] [2023-11-23 14:37:52,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:37:52,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-23 14:37:52,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:37:52,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-23 14:37:52,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2023-11-23 14:37:52,923 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 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) [2023-11-23 14:37:53,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:37:53,119 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2023-11-23 14:37:53,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 14:37:53,119 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-23 14:37:53,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:37:53,121 INFO L225 Difference]: With dead ends: 43 [2023-11-23 14:37:53,121 INFO L226 Difference]: Without dead ends: 41 [2023-11-23 14:37:53,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2023-11-23 14:37:53,122 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:37:53,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 113 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:37:53,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-23 14:37:53,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2023-11-23 14:37:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:37:53,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2023-11-23 14:37:53,134 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 17 [2023-11-23 14:37:53,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:37:53,134 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2023-11-23 14:37:53,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 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) [2023-11-23 14:37:53,134 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2023-11-23 14:37:53,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 14:37:53,135 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:37:53,135 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1] [2023-11-23 14:37:53,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 14:37:53,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:37:53,351 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:37:53,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:37:53,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1956042473, now seen corresponding path program 3 times [2023-11-23 14:37:53,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:37:53,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839912982] [2023-11-23 14:37:53,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:37:53,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:37:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:37:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:53,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:37:53,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839912982] [2023-11-23 14:37:53,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839912982] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:37:53,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906297726] [2023-11-23 14:37:53,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 14:37:53,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:37:53,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:37:53,663 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) [2023-11-23 14:37:53,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 14:37:53,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-23 14:37:53,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:37:53,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-23 14:37:53,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:37:53,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 14:37:53,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:37:53,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-23 14:37:53,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-23 14:37:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:53,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:37:54,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-23 14:37:54,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-23 14:37:54,254 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:54,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906297726] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:37:54,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:37:54,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-11-23 14:37:54,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650840453] [2023-11-23 14:37:54,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:37:54,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-23 14:37:54,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:37:54,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-23 14:37:54,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2023-11-23 14:37:54,257 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 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) [2023-11-23 14:37:54,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:37:54,434 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2023-11-23 14:37:54,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 14:37:54,435 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 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 19 [2023-11-23 14:37:54,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:37:54,436 INFO L225 Difference]: With dead ends: 40 [2023-11-23 14:37:54,437 INFO L226 Difference]: Without dead ends: 38 [2023-11-23 14:37:54,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2023-11-23 14:37:54,438 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 51 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:37:54,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 55 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:37:54,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-23 14:37:54,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2023-11-23 14:37:54,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 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) [2023-11-23 14:37:54,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-11-23 14:37:54,446 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 19 [2023-11-23 14:37:54,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:37:54,446 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-11-23 14:37:54,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 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) [2023-11-23 14:37:54,447 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-11-23 14:37:54,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 14:37:54,447 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:37:54,447 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:37:54,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 14:37:54,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:37:54,665 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:37:54,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:37:54,665 INFO L85 PathProgramCache]: Analyzing trace with hash -457694673, now seen corresponding path program 1 times [2023-11-23 14:37:54,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:37:54,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636648125] [2023-11-23 14:37:54,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:37:54,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:37:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:37:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:54,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:37:54,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636648125] [2023-11-23 14:37:54,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636648125] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:37:54,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491862479] [2023-11-23 14:37:54,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:37:54,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:37:54,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:37:54,769 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) [2023-11-23 14:37:54,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 14:37:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:37:54,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 14:37:54,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:37:54,878 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:54,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:37:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:54,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491862479] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:37:54,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:37:54,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2023-11-23 14:37:54,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906795541] [2023-11-23 14:37:54,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:37:54,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 14:37:54,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:37:54,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 14:37:54,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-23 14:37:54,931 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:37:54,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:37:54,965 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2023-11-23 14:37:54,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 14:37:54,966 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-23 14:37:54,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:37:54,966 INFO L225 Difference]: With dead ends: 44 [2023-11-23 14:37:54,966 INFO L226 Difference]: Without dead ends: 34 [2023-11-23 14:37:54,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-23 14:37:54,967 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:37:54,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 14:37:54,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-23 14:37:54,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-11-23 14:37:54,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 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) [2023-11-23 14:37:54,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2023-11-23 14:37:54,972 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 20 [2023-11-23 14:37:54,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:37:54,973 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2023-11-23 14:37:54,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:37:54,973 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2023-11-23 14:37:54,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-23 14:37:54,974 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:37:54,974 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:37:54,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 14:37:55,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:37:55,195 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:37:55,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:37:55,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1649746456, now seen corresponding path program 2 times [2023-11-23 14:37:55,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:37:55,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169860081] [2023-11-23 14:37:55,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:37:55,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:37:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:37:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:55,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:37:55,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169860081] [2023-11-23 14:37:55,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169860081] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:37:55,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888514047] [2023-11-23 14:37:55,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 14:37:55,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:37:55,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:37:55,544 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) [2023-11-23 14:37:55,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 14:37:55,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 14:37:55,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:37:55,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-23 14:37:55,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:37:55,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 14:37:55,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-23 14:37:55,987 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 14:37:55,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-11-23 14:37:56,003 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:56,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:37:56,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-23 14:37:56,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2023-11-23 14:37:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:57,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888514047] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:37:57,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:37:57,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2023-11-23 14:37:57,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413359191] [2023-11-23 14:37:57,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:37:57,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-23 14:37:57,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:37:57,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-23 14:37:57,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=852, Unknown=1, NotChecked=0, Total=1056 [2023-11-23 14:37:57,069 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 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) [2023-11-23 14:37:57,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:37:57,636 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2023-11-23 14:37:57,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-23 14:37:57,636 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-23 14:37:57,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:37:57,637 INFO L225 Difference]: With dead ends: 50 [2023-11-23 14:37:57,637 INFO L226 Difference]: Without dead ends: 34 [2023-11-23 14:37:57,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=328, Invalid=1477, Unknown=1, NotChecked=0, Total=1806 [2023-11-23 14:37:57,638 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 30 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:37:57,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 52 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 14:37:57,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-23 14:37:57,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-11-23 14:37:57,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 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) [2023-11-23 14:37:57,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-11-23 14:37:57,642 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 22 [2023-11-23 14:37:57,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:37:57,642 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-11-23 14:37:57,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 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) [2023-11-23 14:37:57,643 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-11-23 14:37:57,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-23 14:37:57,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:37:57,643 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:37:57,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-23 14:37:57,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:37:57,857 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:37:57,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:37:57,857 INFO L85 PathProgramCache]: Analyzing trace with hash 707380890, now seen corresponding path program 3 times [2023-11-23 14:37:57,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:37:57,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278976783] [2023-11-23 14:37:57,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:37:57,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:37:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:37:58,255 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:58,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:37:58,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278976783] [2023-11-23 14:37:58,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278976783] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:37:58,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96283030] [2023-11-23 14:37:58,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 14:37:58,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:37:58,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:37:58,257 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) [2023-11-23 14:37:58,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 14:37:58,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-23 14:37:58,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:37:58,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-23 14:37:58,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:37:58,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-23 14:37:58,412 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-23 14:37:58,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-23 14:37:58,445 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-23 14:37:58,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-23 14:37:58,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-11-23 14:37:58,516 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:58,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:37:58,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2023-11-23 14:37:58,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 198 [2023-11-23 14:37:58,890 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:58,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96283030] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:37:58,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:37:58,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2023-11-23 14:37:58,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354956548] [2023-11-23 14:37:58,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:37:58,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-23 14:37:58,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:37:58,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-23 14:37:58,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2023-11-23 14:37:58,893 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 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) [2023-11-23 14:37:59,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:37:59,133 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2023-11-23 14:37:59,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 14:37:59,133 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 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 26 [2023-11-23 14:37:59,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:37:59,134 INFO L225 Difference]: With dead ends: 40 [2023-11-23 14:37:59,134 INFO L226 Difference]: Without dead ends: 38 [2023-11-23 14:37:59,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2023-11-23 14:37:59,135 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 39 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:37:59,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 67 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:37:59,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-23 14:37:59,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2023-11-23 14:37:59,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2023-11-23 14:37:59,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-11-23 14:37:59,140 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2023-11-23 14:37:59,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:37:59,140 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-11-23 14:37:59,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 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) [2023-11-23 14:37:59,140 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-11-23 14:37:59,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-23 14:37:59,141 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:37:59,141 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-23 14:37:59,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 14:37:59,352 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,SelfDestructingSolverStorable10 [2023-11-23 14:37:59,353 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:37:59,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:37:59,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1815214953, now seen corresponding path program 4 times [2023-11-23 14:37:59,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:37:59,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197618518] [2023-11-23 14:37:59,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:37:59,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:37:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:37:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:37:59,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:37:59,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197618518] [2023-11-23 14:37:59,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197618518] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:37:59,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032434990] [2023-11-23 14:37:59,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 14:37:59,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:37:59,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:37:59,780 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) [2023-11-23 14:37:59,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 14:37:59,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 14:37:59,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:37:59,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-23 14:37:59,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:37:59,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-23 14:37:59,971 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-23 14:37:59,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-23 14:38:00,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-11-23 14:38:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:00,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:38:00,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-23 14:38:00,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2023-11-23 14:38:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:00,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032434990] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:38:00,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:38:00,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 34 [2023-11-23 14:38:00,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149194829] [2023-11-23 14:38:00,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:38:00,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-23 14:38:00,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:38:00,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-23 14:38:00,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2023-11-23 14:38:00,510 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 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) [2023-11-23 14:38:00,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:38:00,931 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2023-11-23 14:38:00,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 14:38:00,931 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 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 29 [2023-11-23 14:38:00,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:38:00,932 INFO L225 Difference]: With dead ends: 43 [2023-11-23 14:38:00,932 INFO L226 Difference]: Without dead ends: 41 [2023-11-23 14:38:00,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=217, Invalid=1675, Unknown=0, NotChecked=0, Total=1892 [2023-11-23 14:38:00,933 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 60 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:38:00,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 82 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 14:38:00,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-23 14:38:00,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2023-11-23 14:38:00,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 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) [2023-11-23 14:38:00,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2023-11-23 14:38:00,939 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 29 [2023-11-23 14:38:00,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:38:00,939 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2023-11-23 14:38:00,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 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) [2023-11-23 14:38:00,939 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2023-11-23 14:38:00,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 14:38:00,940 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:38:00,940 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 4, 3, 3, 1, 1, 1, 1, 1] [2023-11-23 14:38:00,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-23 14:38:01,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:38:01,152 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:38:01,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:38:01,153 INFO L85 PathProgramCache]: Analyzing trace with hash 869771642, now seen corresponding path program 5 times [2023-11-23 14:38:01,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:38:01,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037618485] [2023-11-23 14:38:01,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:38:01,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:38:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:38:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:01,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:38:01,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037618485] [2023-11-23 14:38:01,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037618485] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:38:01,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358467947] [2023-11-23 14:38:01,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 14:38:01,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:38:01,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:38:01,568 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:38:01,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 14:38:01,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-11-23 14:38:01,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:38:01,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-23 14:38:01,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:38:01,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 14:38:02,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-23 14:38:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:02,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:38:02,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-23 14:38:02,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-23 14:38:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:02,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358467947] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:38:02,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:38:02,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2023-11-23 14:38:02,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708421465] [2023-11-23 14:38:02,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:38:02,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-23 14:38:02,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:38:02,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-23 14:38:02,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1665, Unknown=0, NotChecked=0, Total=1806 [2023-11-23 14:38:02,515 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 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) [2023-11-23 14:38:03,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:38:03,206 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2023-11-23 14:38:03,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-23 14:38:03,207 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-23 14:38:03,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:38:03,208 INFO L225 Difference]: With dead ends: 58 [2023-11-23 14:38:03,208 INFO L226 Difference]: Without dead ends: 40 [2023-11-23 14:38:03,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=272, Invalid=2698, Unknown=0, NotChecked=0, Total=2970 [2023-11-23 14:38:03,209 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 14:38:03,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 174 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 14:38:03,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-23 14:38:03,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-23 14:38:03,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 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) [2023-11-23 14:38:03,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2023-11-23 14:38:03,215 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 32 [2023-11-23 14:38:03,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:38:03,215 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2023-11-23 14:38:03,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 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) [2023-11-23 14:38:03,216 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2023-11-23 14:38:03,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-23 14:38:03,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:38:03,216 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 4, 3, 3, 1, 1, 1, 1, 1] [2023-11-23 14:38:03,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 14:38:03,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 14:38:03,432 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:38:03,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:38:03,432 INFO L85 PathProgramCache]: Analyzing trace with hash 607754163, now seen corresponding path program 6 times [2023-11-23 14:38:03,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:38:03,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001464700] [2023-11-23 14:38:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:38:03,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:38:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:38:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:03,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:38:03,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001464700] [2023-11-23 14:38:03,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001464700] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:38:03,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076291397] [2023-11-23 14:38:03,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 14:38:03,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:38:03,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:38:03,857 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:38:03,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 14:38:03,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-11-23 14:38:03,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:38:03,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-23 14:38:03,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:38:04,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-23 14:38:04,074 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-23 14:38:04,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-23 14:38:04,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-11-23 14:38:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:04,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:38:04,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-23 14:38:04,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-23 14:38:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:04,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076291397] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:38:04,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:38:04,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2023-11-23 14:38:04,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163945152] [2023-11-23 14:38:04,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:38:04,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-23 14:38:04,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:38:04,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-23 14:38:04,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1434, Unknown=0, NotChecked=0, Total=1560 [2023-11-23 14:38:04,741 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:38:05,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:38:05,210 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2023-11-23 14:38:05,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-23 14:38:05,210 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-23 14:38:05,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:38:05,211 INFO L225 Difference]: With dead ends: 46 [2023-11-23 14:38:05,211 INFO L226 Difference]: Without dead ends: 44 [2023-11-23 14:38:05,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=256, Invalid=2294, Unknown=0, NotChecked=0, Total=2550 [2023-11-23 14:38:05,212 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 56 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 14:38:05,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 120 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 14:38:05,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-23 14:38:05,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2023-11-23 14:38:05,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:38:05,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2023-11-23 14:38:05,218 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 34 [2023-11-23 14:38:05,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:38:05,218 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2023-11-23 14:38:05,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:38:05,218 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2023-11-23 14:38:05,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 14:38:05,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:38:05,219 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 5, 4, 4, 1, 1, 1, 1, 1] [2023-11-23 14:38:05,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 14:38:05,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 14:38:05,424 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:38:05,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:38:05,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1972637474, now seen corresponding path program 7 times [2023-11-23 14:38:05,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:38:05,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927263090] [2023-11-23 14:38:05,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:38:05,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:38:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:38:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 18 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:05,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:38:05,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927263090] [2023-11-23 14:38:05,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927263090] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:38:05,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707068658] [2023-11-23 14:38:05,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 14:38:05,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:38:05,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:38:05,970 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:38:05,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 14:38:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:38:06,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-23 14:38:06,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:38:06,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 14:38:06,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-23 14:38:06,499 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:06,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:38:06,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-23 14:38:06,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-23 14:38:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:07,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707068658] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:38:07,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:38:07,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2023-11-23 14:38:07,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495629330] [2023-11-23 14:38:07,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:38:07,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-23 14:38:07,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:38:07,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-23 14:38:07,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2188, Unknown=0, NotChecked=0, Total=2352 [2023-11-23 14:38:07,006 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 49 states, 49 states have (on average 2.204081632653061) internal successors, (108), 48 states have internal predecessors, (108), 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) [2023-11-23 14:38:07,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:38:07,792 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2023-11-23 14:38:07,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-23 14:38:07,792 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.204081632653061) internal successors, (108), 48 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-23 14:38:07,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:38:07,793 INFO L225 Difference]: With dead ends: 64 [2023-11-23 14:38:07,793 INFO L226 Difference]: Without dead ends: 43 [2023-11-23 14:38:07,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=325, Invalid=3581, Unknown=0, NotChecked=0, Total=3906 [2023-11-23 14:38:07,795 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 40 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 14:38:07,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 256 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 14:38:07,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-23 14:38:07,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-23 14:38:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 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) [2023-11-23 14:38:07,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2023-11-23 14:38:07,800 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 37 [2023-11-23 14:38:07,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:38:07,800 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2023-11-23 14:38:07,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.204081632653061) internal successors, (108), 48 states have internal predecessors, (108), 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) [2023-11-23 14:38:07,801 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2023-11-23 14:38:07,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 14:38:07,802 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:38:07,802 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 5, 4, 4, 1, 1, 1, 1, 1] [2023-11-23 14:38:07,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 14:38:08,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 14:38:08,008 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:38:08,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:38:08,009 INFO L85 PathProgramCache]: Analyzing trace with hash 827522629, now seen corresponding path program 8 times [2023-11-23 14:38:08,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:38:08,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237172880] [2023-11-23 14:38:08,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:38:08,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:38:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:38:08,504 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:08,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:38:08,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237172880] [2023-11-23 14:38:08,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237172880] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:38:08,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791646201] [2023-11-23 14:38:08,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 14:38:08,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:38:08,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:38:08,506 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:38:08,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 14:38:08,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 14:38:08,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:38:08,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-23 14:38:08,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:38:08,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 14:38:08,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:38:08,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-23 14:38:09,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-23 14:38:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:09,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:38:09,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-23 14:38:09,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-23 14:38:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:09,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791646201] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:38:09,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:38:09,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 51 [2023-11-23 14:38:09,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804806746] [2023-11-23 14:38:09,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:38:09,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-23 14:38:09,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:38:09,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-23 14:38:09,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2482, Unknown=0, NotChecked=0, Total=2652 [2023-11-23 14:38:09,701 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 52 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 51 states have internal predecessors, (114), 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) [2023-11-23 14:38:10,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:38:10,395 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2023-11-23 14:38:10,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-23 14:38:10,395 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 51 states have internal predecessors, (114), 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 [2023-11-23 14:38:10,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:38:10,396 INFO L225 Difference]: With dead ends: 49 [2023-11-23 14:38:10,396 INFO L226 Difference]: Without dead ends: 47 [2023-11-23 14:38:10,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=310, Invalid=3722, Unknown=0, NotChecked=0, Total=4032 [2023-11-23 14:38:10,397 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 29 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 14:38:10,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 197 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 14:38:10,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-23 14:38:10,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2023-11-23 14:38:10,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 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) [2023-11-23 14:38:10,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2023-11-23 14:38:10,403 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 39 [2023-11-23 14:38:10,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:38:10,403 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2023-11-23 14:38:10,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 51 states have internal predecessors, (114), 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) [2023-11-23 14:38:10,404 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2023-11-23 14:38:10,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-23 14:38:10,404 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:38:10,405 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 6, 5, 5, 1, 1, 1, 1, 1] [2023-11-23 14:38:10,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 14:38:10,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 14:38:10,616 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:38:10,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:38:10,617 INFO L85 PathProgramCache]: Analyzing trace with hash -380425972, now seen corresponding path program 9 times [2023-11-23 14:38:10,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:38:10,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597228897] [2023-11-23 14:38:10,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:38:10,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:38:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:38:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 30 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:11,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:38:11,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597228897] [2023-11-23 14:38:11,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597228897] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:38:11,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638157681] [2023-11-23 14:38:11,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 14:38:11,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:38:11,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:38:11,217 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:38:11,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 14:38:11,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-23 14:38:11,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:38:11,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-23 14:38:11,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:38:11,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-23 14:38:12,134 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-23 14:38:12,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-23 14:38:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 35 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:12,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:38:12,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-23 14:38:12,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2023-11-23 14:38:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 30 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:13,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638157681] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:38:13,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:38:13,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 53 [2023-11-23 14:38:13,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394573671] [2023-11-23 14:38:13,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:38:13,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-23 14:38:13,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:38:13,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-23 14:38:13,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=2421, Unknown=0, NotChecked=0, Total=2862 [2023-11-23 14:38:13,037 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 54 states, 54 states have (on average 2.259259259259259) internal successors, (122), 53 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:38:13,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:38:13,461 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2023-11-23 14:38:13,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-23 14:38:13,462 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.259259259259259) internal successors, (122), 53 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-11-23 14:38:13,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:38:13,462 INFO L225 Difference]: With dead ends: 67 [2023-11-23 14:38:13,462 INFO L226 Difference]: Without dead ends: 46 [2023-11-23 14:38:13,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=556, Invalid=2984, Unknown=0, NotChecked=0, Total=3540 [2023-11-23 14:38:13,464 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 14:38:13,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 111 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 14:38:13,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-23 14:38:13,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-23 14:38:13,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 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) [2023-11-23 14:38:13,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2023-11-23 14:38:13,470 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 42 [2023-11-23 14:38:13,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:38:13,470 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2023-11-23 14:38:13,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.259259259259259) internal successors, (122), 53 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:38:13,471 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2023-11-23 14:38:13,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-23 14:38:13,471 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:38:13,471 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 6, 5, 5, 1, 1, 1, 1, 1] [2023-11-23 14:38:13,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-23 14:38:13,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:38:13,676 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:38:13,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:38:13,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1502569477, now seen corresponding path program 10 times [2023-11-23 14:38:13,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:38:13,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971205947] [2023-11-23 14:38:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:38:13,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:38:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:38:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:14,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:38:14,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971205947] [2023-11-23 14:38:14,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971205947] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:38:14,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855352510] [2023-11-23 14:38:14,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 14:38:14,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:38:14,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:38:14,244 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:38:14,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-23 14:38:14,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 14:38:14,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:38:14,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-23 14:38:14,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:38:14,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-23 14:38:14,514 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-23 14:38:14,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-23 14:38:14,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-11-23 14:38:14,702 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:14,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:38:14,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-23 14:38:14,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-23 14:38:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:15,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855352510] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:38:15,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:38:15,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 47 [2023-11-23 14:38:15,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992592107] [2023-11-23 14:38:15,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:38:15,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-23 14:38:15,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:38:15,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-23 14:38:15,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2111, Unknown=0, NotChecked=0, Total=2256 [2023-11-23 14:38:15,342 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 48 states, 48 states have (on average 2.2916666666666665) internal successors, (110), 47 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:38:16,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:38:16,052 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2023-11-23 14:38:16,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-23 14:38:16,052 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.2916666666666665) internal successors, (110), 47 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-11-23 14:38:16,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:38:16,053 INFO L225 Difference]: With dead ends: 52 [2023-11-23 14:38:16,053 INFO L226 Difference]: Without dead ends: 50 [2023-11-23 14:38:16,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=292, Invalid=3368, Unknown=0, NotChecked=0, Total=3660 [2023-11-23 14:38:16,054 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 14:38:16,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 215 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 14:38:16,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-23 14:38:16,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2023-11-23 14:38:16,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0625) internal successors, (51), 48 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) [2023-11-23 14:38:16,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2023-11-23 14:38:16,060 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2023-11-23 14:38:16,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:38:16,061 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2023-11-23 14:38:16,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.2916666666666665) internal successors, (110), 47 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:38:16,061 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2023-11-23 14:38:16,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 14:38:16,062 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:38:16,062 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 7, 6, 6, 1, 1, 1, 1, 1] [2023-11-23 14:38:16,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-23 14:38:16,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-23 14:38:16,276 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:38:16,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:38:16,277 INFO L85 PathProgramCache]: Analyzing trace with hash 903342924, now seen corresponding path program 11 times [2023-11-23 14:38:16,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:38:16,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503942093] [2023-11-23 14:38:16,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:38:16,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:38:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:38:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 45 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:16,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:38:16,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503942093] [2023-11-23 14:38:16,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503942093] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:38:16,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116460994] [2023-11-23 14:38:16,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 14:38:16,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:38:16,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:38:16,930 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:38:16,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-23 14:38:17,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-11-23 14:38:17,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:38:17,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-23 14:38:17,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:38:17,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 14:38:17,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-23 14:38:17,789 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:17,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:38:18,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-23 14:38:18,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-23 14:38:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:18,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116460994] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:38:18,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:38:18,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 62 [2023-11-23 14:38:18,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692909729] [2023-11-23 14:38:18,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:38:18,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-11-23 14:38:18,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:38:18,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-11-23 14:38:18,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=3682, Unknown=0, NotChecked=0, Total=3906 [2023-11-23 14:38:18,528 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 63 states, 63 states have (on average 2.1904761904761907) internal successors, (138), 62 states have internal predecessors, (138), 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) [2023-11-23 14:38:19,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:38:19,794 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2023-11-23 14:38:19,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-23 14:38:19,795 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.1904761904761907) internal successors, (138), 62 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-11-23 14:38:19,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:38:19,795 INFO L225 Difference]: With dead ends: 77 [2023-11-23 14:38:19,795 INFO L226 Difference]: Without dead ends: 50 [2023-11-23 14:38:19,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=472, Invalid=6170, Unknown=0, NotChecked=0, Total=6642 [2023-11-23 14:38:19,797 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 1878 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 1884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 14:38:19,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 385 Invalid, 1884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1878 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 14:38:19,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-23 14:38:19,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-23 14:38:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 states have internal predecessors, (52), 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) [2023-11-23 14:38:19,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2023-11-23 14:38:19,804 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2023-11-23 14:38:19,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:38:19,804 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2023-11-23 14:38:19,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.1904761904761907) internal successors, (138), 62 states have internal predecessors, (138), 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) [2023-11-23 14:38:19,804 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2023-11-23 14:38:19,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-23 14:38:19,805 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:38:19,805 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 7, 6, 6, 1, 1, 1, 1, 1] [2023-11-23 14:38:19,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-23 14:38:20,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:38:20,016 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:38:20,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:38:20,017 INFO L85 PathProgramCache]: Analyzing trace with hash -306460436, now seen corresponding path program 1 times [2023-11-23 14:38:20,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:38:20,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151680289] [2023-11-23 14:38:20,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:38:20,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:38:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:38:20,224 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-23 14:38:20,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:38:20,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151680289] [2023-11-23 14:38:20,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151680289] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:38:20,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900510468] [2023-11-23 14:38:20,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:38:20,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:38:20,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:38:20,226 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:38:20,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-23 14:38:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:38:20,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 14:38:20,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:38:20,503 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-23 14:38:20,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:38:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-23 14:38:20,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900510468] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:38:20,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:38:20,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-11-23 14:38:20,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863915808] [2023-11-23 14:38:20,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:38:20,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-23 14:38:20,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:38:20,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-23 14:38:20,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=754, Invalid=886, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 14:38:20,748 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:38:20,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:38:20,913 INFO L93 Difference]: Finished difference Result 422 states and 451 transitions. [2023-11-23 14:38:20,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-23 14:38:20,914 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-11-23 14:38:20,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:38:20,915 INFO L225 Difference]: With dead ends: 422 [2023-11-23 14:38:20,915 INFO L226 Difference]: Without dead ends: 399 [2023-11-23 14:38:20,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=754, Invalid=886, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 14:38:20,916 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 206 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:38:20,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 105 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:38:20,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2023-11-23 14:38:20,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 77. [2023-11-23 14:38:20,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 76 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:38:20,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2023-11-23 14:38:20,932 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 48 [2023-11-23 14:38:20,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:38:20,933 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2023-11-23 14:38:20,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:38:20,933 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2023-11-23 14:38:20,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-23 14:38:20,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:38:20,934 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 7, 6, 6, 1, 1, 1, 1, 1] [2023-11-23 14:38:20,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-23 14:38:21,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:38:21,148 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:38:21,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:38:21,149 INFO L85 PathProgramCache]: Analyzing trace with hash 756458483, now seen corresponding path program 12 times [2023-11-23 14:38:21,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:38:21,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417802998] [2023-11-23 14:38:21,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:38:21,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:38:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:38:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:21,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:38:21,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417802998] [2023-11-23 14:38:21,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417802998] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:38:21,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118405727] [2023-11-23 14:38:21,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 14:38:21,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:38:21,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:38:21,750 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:38:21,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-23 14:38:22,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-11-23 14:38:22,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:38:22,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-23 14:38:22,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:38:22,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-23 14:38:22,289 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-23 14:38:22,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-23 14:38:22,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-11-23 14:38:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:22,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:38:22,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-23 14:38:22,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-23 14:38:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:23,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118405727] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:38:23,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:38:23,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 54 [2023-11-23 14:38:23,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740267663] [2023-11-23 14:38:23,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:38:23,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-11-23 14:38:23,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:38:23,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-11-23 14:38:23,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2796, Unknown=0, NotChecked=0, Total=2970 [2023-11-23 14:38:23,302 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 54 states have internal predecessors, (123), 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) [2023-11-23 14:38:24,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:38:24,137 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2023-11-23 14:38:24,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-23 14:38:24,137 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 54 states have internal predecessors, (123), 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 49 [2023-11-23 14:38:24,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:38:24,138 INFO L225 Difference]: With dead ends: 83 [2023-11-23 14:38:24,138 INFO L226 Difference]: Without dead ends: 81 [2023-11-23 14:38:24,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=373, Invalid=4739, Unknown=0, NotChecked=0, Total=5112 [2023-11-23 14:38:24,139 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 77 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 14:38:24,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 232 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 14:38:24,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-23 14:38:24,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2023-11-23 14:38:24,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 79 states have internal predecessors, (95), 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) [2023-11-23 14:38:24,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2023-11-23 14:38:24,153 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 49 [2023-11-23 14:38:24,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:38:24,154 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2023-11-23 14:38:24,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 54 states have internal predecessors, (123), 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) [2023-11-23 14:38:24,154 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2023-11-23 14:38:24,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-23 14:38:24,154 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:38:24,154 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 8, 7, 7, 1, 1, 1, 1, 1] [2023-11-23 14:38:24,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-23 14:38:24,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:38:24,356 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:38:24,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:38:24,357 INFO L85 PathProgramCache]: Analyzing trace with hash -33522530, now seen corresponding path program 13 times [2023-11-23 14:38:24,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:38:24,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541896005] [2023-11-23 14:38:24,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:38:24,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:38:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:38:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 63 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:25,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:38:25,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541896005] [2023-11-23 14:38:25,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541896005] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:38:25,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277342156] [2023-11-23 14:38:25,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 14:38:25,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:38:25,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:38:25,010 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:38:25,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-23 14:38:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:38:25,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-23 14:38:25,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:38:25,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 14:38:25,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-23 14:38:25,825 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 0 proven. 233 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:25,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:38:26,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-23 14:38:26,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-23 14:38:26,627 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 0 proven. 233 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:26,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277342156] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:38:26,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:38:26,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 66 [2023-11-23 14:38:26,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646877974] [2023-11-23 14:38:26,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:38:26,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-11-23 14:38:26,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:38:26,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-11-23 14:38:26,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=4183, Unknown=0, NotChecked=0, Total=4422 [2023-11-23 14:38:26,629 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 67 states, 67 states have (on average 2.283582089552239) internal successors, (153), 66 states have internal predecessors, (153), 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) [2023-11-23 14:38:27,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:38:27,924 INFO L93 Difference]: Finished difference Result 110 states and 126 transitions. [2023-11-23 14:38:27,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-23 14:38:27,926 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.283582089552239) internal successors, (153), 66 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-11-23 14:38:27,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:38:27,928 INFO L225 Difference]: With dead ends: 110 [2023-11-23 14:38:27,928 INFO L226 Difference]: Without dead ends: 80 [2023-11-23 14:38:27,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1615 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=502, Invalid=6980, Unknown=0, NotChecked=0, Total=7482 [2023-11-23 14:38:27,931 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 1890 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 14:38:27,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 438 Invalid, 1894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1890 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 14:38:27,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-23 14:38:27,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-11-23 14:38:27,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 79 states have internal predecessors, (94), 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) [2023-11-23 14:38:27,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2023-11-23 14:38:27,945 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 52 [2023-11-23 14:38:27,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:38:27,945 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2023-11-23 14:38:27,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.283582089552239) internal successors, (153), 66 states have internal predecessors, (153), 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) [2023-11-23 14:38:27,946 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2023-11-23 14:38:27,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 14:38:27,946 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:38:27,946 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 8, 7, 7, 1, 1, 1, 1, 1] [2023-11-23 14:38:27,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-23 14:38:28,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:38:28,152 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:38:28,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:38:28,153 INFO L85 PathProgramCache]: Analyzing trace with hash -164752297, now seen corresponding path program 14 times [2023-11-23 14:38:28,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:38:28,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660291681] [2023-11-23 14:38:28,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:38:28,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:38:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:38:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:28,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:38:28,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660291681] [2023-11-23 14:38:28,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660291681] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:38:28,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925087020] [2023-11-23 14:38:28,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 14:38:28,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:38:28,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:38:28,775 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:38:28,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-23 14:38:28,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 14:38:28,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:38:28,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 67 conjunts are in the unsatisfiable core [2023-11-23 14:38:28,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:38:29,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 14:38:29,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:38:29,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-23 14:38:29,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-23 14:38:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:29,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:38:30,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-23 14:38:30,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-23 14:38:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:30,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925087020] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:38:30,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:38:30,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 69 [2023-11-23 14:38:30,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152159968] [2023-11-23 14:38:30,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:38:30,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-11-23 14:38:30,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:38:30,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-11-23 14:38:30,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=4597, Unknown=0, NotChecked=0, Total=4830 [2023-11-23 14:38:30,651 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 70 states, 70 states have (on average 2.2714285714285714) internal successors, (159), 69 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) [2023-11-23 14:38:31,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:38:31,711 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2023-11-23 14:38:31,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-23 14:38:31,711 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.2714285714285714) internal successors, (159), 69 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 54 [2023-11-23 14:38:31,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:38:31,712 INFO L225 Difference]: With dead ends: 86 [2023-11-23 14:38:31,712 INFO L226 Difference]: Without dead ends: 84 [2023-11-23 14:38:31,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=448, Invalid=7208, Unknown=0, NotChecked=0, Total=7656 [2023-11-23 14:38:31,713 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 79 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 1839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 14:38:31,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 427 Invalid, 1839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1829 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 14:38:31,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-23 14:38:31,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2023-11-23 14:38:31,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1829268292682926) internal successors, (97), 82 states have internal predecessors, (97), 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) [2023-11-23 14:38:31,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2023-11-23 14:38:31,726 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 54 [2023-11-23 14:38:31,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:38:31,726 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2023-11-23 14:38:31,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.2714285714285714) internal successors, (159), 69 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) [2023-11-23 14:38:31,727 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2023-11-23 14:38:31,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-23 14:38:31,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:38:31,727 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 9, 8, 8, 1, 1, 1, 1, 1] [2023-11-23 14:38:31,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-23 14:38:31,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-23 14:38:31,928 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:38:31,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:38:31,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1017151930, now seen corresponding path program 15 times [2023-11-23 14:38:31,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:38:31,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715929538] [2023-11-23 14:38:31,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:38:31,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:38:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:38:32,814 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 84 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:32,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:38:32,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715929538] [2023-11-23 14:38:32,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715929538] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:38:32,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023796921] [2023-11-23 14:38:32,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 14:38:32,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:38:32,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:38:32,816 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:38:32,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-23 14:38:33,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-11-23 14:38:33,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:38:33,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-23 14:38:33,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:38:33,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-23 14:38:34,188 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-23 14:38:34,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-23 14:38:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 92 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:34,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:38:34,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-23 14:38:34,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2023-11-23 14:38:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 77 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:35,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023796921] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:38:35,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:38:35,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 74 [2023-11-23 14:38:35,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429452512] [2023-11-23 14:38:35,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:38:35,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-11-23 14:38:35,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:38:35,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-11-23 14:38:35,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=4812, Unknown=0, NotChecked=0, Total=5550 [2023-11-23 14:38:35,561 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 75 states, 75 states have (on average 2.24) internal successors, (168), 74 states have internal predecessors, (168), 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) [2023-11-23 14:38:36,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:38:36,330 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2023-11-23 14:38:36,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-23 14:38:36,331 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.24) internal successors, (168), 74 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-11-23 14:38:36,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:38:36,331 INFO L225 Difference]: With dead ends: 113 [2023-11-23 14:38:36,331 INFO L226 Difference]: Without dead ends: 83 [2023-11-23 14:38:36,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1036, Invalid=6274, Unknown=0, NotChecked=0, Total=7310 [2023-11-23 14:38:36,332 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 14:38:36,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 179 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 14:38:36,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-23 14:38:36,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-23 14:38:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.170731707317073) internal successors, (96), 82 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:38:36,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2023-11-23 14:38:36,345 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 57 [2023-11-23 14:38:36,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:38:36,345 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2023-11-23 14:38:36,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.24) internal successors, (168), 74 states have internal predecessors, (168), 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) [2023-11-23 14:38:36,345 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2023-11-23 14:38:36,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-23 14:38:36,345 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:38:36,345 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 9, 8, 8, 1, 1, 1, 1, 1] [2023-11-23 14:38:36,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-23 14:38:36,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-23 14:38:36,546 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:38:36,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:38:36,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1074386337, now seen corresponding path program 16 times [2023-11-23 14:38:36,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:38:36,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986246096] [2023-11-23 14:38:36,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:38:36,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:38:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:38:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:37,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:38:37,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986246096] [2023-11-23 14:38:37,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986246096] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:38:37,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922071955] [2023-11-23 14:38:37,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 14:38:37,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:38:37,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:38:37,395 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:38:37,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-23 14:38:37,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 14:38:37,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:38:37,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 67 conjunts are in the unsatisfiable core [2023-11-23 14:38:37,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:38:37,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-23 14:38:38,022 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-23 14:38:38,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-23 14:38:38,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-11-23 14:38:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:38,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:38:38,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-23 14:38:38,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2023-11-23 14:38:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:39,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922071955] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:38:39,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:38:39,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 75 [2023-11-23 14:38:39,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151574466] [2023-11-23 14:38:39,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:38:39,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-11-23 14:38:39,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:38:39,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-11-23 14:38:39,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=5432, Unknown=0, NotChecked=0, Total=5700 [2023-11-23 14:38:39,256 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 76 states, 76 states have (on average 2.289473684210526) internal successors, (174), 75 states have internal predecessors, (174), 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) [2023-11-23 14:38:40,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:38:40,712 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2023-11-23 14:38:40,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-23 14:38:40,712 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.289473684210526) internal successors, (174), 75 states have internal predecessors, (174), 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 59 [2023-11-23 14:38:40,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:38:40,712 INFO L225 Difference]: With dead ends: 89 [2023-11-23 14:38:40,712 INFO L226 Difference]: Without dead ends: 87 [2023-11-23 14:38:40,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=530, Invalid=8590, Unknown=0, NotChecked=0, Total=9120 [2023-11-23 14:38:40,713 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 95 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 1994 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 2005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 14:38:40,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 477 Invalid, 2005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1994 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 14:38:40,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-23 14:38:40,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2023-11-23 14:38:40,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1647058823529413) internal successors, (99), 85 states have internal predecessors, (99), 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) [2023-11-23 14:38:40,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2023-11-23 14:38:40,725 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 59 [2023-11-23 14:38:40,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:38:40,726 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2023-11-23 14:38:40,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.289473684210526) internal successors, (174), 75 states have internal predecessors, (174), 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) [2023-11-23 14:38:40,726 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2023-11-23 14:38:40,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-23 14:38:40,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:38:40,727 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 10, 9, 9, 1, 1, 1, 1, 1] [2023-11-23 14:38:40,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-23 14:38:40,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:38:40,928 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:38:40,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:38:40,928 INFO L85 PathProgramCache]: Analyzing trace with hash 952288304, now seen corresponding path program 17 times [2023-11-23 14:38:40,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:38:40,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575855555] [2023-11-23 14:38:40,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:38:40,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:38:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:38:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 108 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:41,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:38:41,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575855555] [2023-11-23 14:38:41,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575855555] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:38:41,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078329517] [2023-11-23 14:38:41,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 14:38:41,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:38:41,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:38:41,714 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:38:41,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-23 14:38:41,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-11-23 14:38:41,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:38:41,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-23 14:38:41,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:38:42,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 14:38:42,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-23 14:38:42,922 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:42,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:38:43,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-23 14:38:43,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-23 14:38:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:43,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078329517] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:38:43,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:38:43,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 78 [2023-11-23 14:38:43,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635855285] [2023-11-23 14:38:43,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:38:43,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-11-23 14:38:43,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:38:43,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-11-23 14:38:43,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=5868, Unknown=0, NotChecked=0, Total=6162 [2023-11-23 14:38:43,967 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 79 states, 79 states have (on average 2.3164556962025316) internal successors, (183), 78 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:38:45,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:38:45,743 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2023-11-23 14:38:45,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-23 14:38:45,743 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.3164556962025316) internal successors, (183), 78 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2023-11-23 14:38:45,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:38:45,744 INFO L225 Difference]: With dead ends: 122 [2023-11-23 14:38:45,744 INFO L226 Difference]: Without dead ends: 86 [2023-11-23 14:38:45,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2369 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=635, Invalid=9871, Unknown=0, NotChecked=0, Total=10506 [2023-11-23 14:38:45,745 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 2715 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 2719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 14:38:45,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 659 Invalid, 2719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2715 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 14:38:45,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-23 14:38:45,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-11-23 14:38:45,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1529411764705881) internal successors, (98), 85 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:38:45,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2023-11-23 14:38:45,758 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 62 [2023-11-23 14:38:45,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:38:45,758 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2023-11-23 14:38:45,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.3164556962025316) internal successors, (183), 78 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:38:45,758 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2023-11-23 14:38:45,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-23 14:38:45,758 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:38:45,758 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 10, 9, 9, 1, 1, 1, 1, 1] [2023-11-23 14:38:45,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-23 14:38:45,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:38:45,959 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:38:45,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:38:45,960 INFO L85 PathProgramCache]: Analyzing trace with hash 459589801, now seen corresponding path program 18 times [2023-11-23 14:38:45,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:38:45,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888295188] [2023-11-23 14:38:45,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:38:45,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:38:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:38:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:46,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:38:46,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888295188] [2023-11-23 14:38:46,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888295188] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:38:46,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140827492] [2023-11-23 14:38:46,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 14:38:46,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:38:46,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:38:46,833 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:38:46,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-23 14:38:47,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2023-11-23 14:38:47,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:38:47,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-23 14:38:47,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:38:47,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-23 14:38:47,530 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-23 14:38:47,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-23 14:38:47,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-11-23 14:38:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:47,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:38:48,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-23 14:38:48,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2023-11-23 14:38:49,011 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:49,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140827492] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:38:49,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:38:49,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 69 [2023-11-23 14:38:49,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038530909] [2023-11-23 14:38:49,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:38:49,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-11-23 14:38:49,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:38:49,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-11-23 14:38:49,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=4608, Unknown=0, NotChecked=0, Total=4830 [2023-11-23 14:38:49,013 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 70 states, 70 states have (on average 2.3142857142857145) internal successors, (162), 69 states have internal predecessors, (162), 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) [2023-11-23 14:38:50,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:38:50,325 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2023-11-23 14:38:50,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-23 14:38:50,325 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.3142857142857145) internal successors, (162), 69 states have internal predecessors, (162), 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 64 [2023-11-23 14:38:50,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:38:50,327 INFO L225 Difference]: With dead ends: 92 [2023-11-23 14:38:50,327 INFO L226 Difference]: Without dead ends: 90 [2023-11-23 14:38:50,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=490, Invalid=8066, Unknown=0, NotChecked=0, Total=8556 [2023-11-23 14:38:50,328 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 2012 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 2026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 14:38:50,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 415 Invalid, 2026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2012 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 14:38:50,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-23 14:38:50,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2023-11-23 14:38:50,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 88 states have internal predecessors, (101), 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) [2023-11-23 14:38:50,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2023-11-23 14:38:50,341 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 64 [2023-11-23 14:38:50,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:38:50,341 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2023-11-23 14:38:50,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.3142857142857145) internal successors, (162), 69 states have internal predecessors, (162), 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) [2023-11-23 14:38:50,342 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2023-11-23 14:38:50,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-23 14:38:50,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:38:50,342 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 11, 10, 10, 1, 1, 1, 1, 1] [2023-11-23 14:38:50,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-23 14:38:50,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-23 14:38:50,558 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:38:50,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:38:50,559 INFO L85 PathProgramCache]: Analyzing trace with hash -710765528, now seen corresponding path program 19 times [2023-11-23 14:38:50,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:38:50,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674951677] [2023-11-23 14:38:50,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:38:50,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:38:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:38:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 135 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:51,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:38:51,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674951677] [2023-11-23 14:38:51,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674951677] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:38:51,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803567003] [2023-11-23 14:38:51,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 14:38:51,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:38:51,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:38:51,492 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:38:51,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-23 14:38:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:38:51,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-23 14:38:51,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:38:52,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 14:38:52,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-23 14:38:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:52,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:38:53,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-23 14:38:53,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-23 14:38:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:53,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803567003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:38:53,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:38:53,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 84 [2023-11-23 14:38:53,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101337923] [2023-11-23 14:38:53,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:38:53,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2023-11-23 14:38:53,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:38:53,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2023-11-23 14:38:53,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=6817, Unknown=0, NotChecked=0, Total=7140 [2023-11-23 14:38:53,786 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 85 states, 85 states have (on average 2.3294117647058825) internal successors, (198), 84 states have internal predecessors, (198), 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) [2023-11-23 14:38:55,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:38:55,853 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2023-11-23 14:38:55,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-23 14:38:55,854 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.3294117647058825) internal successors, (198), 84 states have internal predecessors, (198), 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 67 [2023-11-23 14:38:55,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:38:55,854 INFO L225 Difference]: With dead ends: 128 [2023-11-23 14:38:55,854 INFO L226 Difference]: Without dead ends: 89 [2023-11-23 14:38:55,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2746 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=706, Invalid=11504, Unknown=0, NotChecked=0, Total=12210 [2023-11-23 14:38:55,855 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 50 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 3158 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 3162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 3158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:38:55,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 763 Invalid, 3162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 3158 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 14:38:55,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-23 14:38:55,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-11-23 14:38:55,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.1363636363636365) internal successors, (100), 88 states have internal predecessors, (100), 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) [2023-11-23 14:38:55,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2023-11-23 14:38:55,868 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 67 [2023-11-23 14:38:55,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:38:55,869 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2023-11-23 14:38:55,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.3294117647058825) internal successors, (198), 84 states have internal predecessors, (198), 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) [2023-11-23 14:38:55,869 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2023-11-23 14:38:55,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-23 14:38:55,869 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:38:55,869 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 11, 10, 10, 1, 1, 1, 1, 1] [2023-11-23 14:38:55,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-23 14:38:56,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-23 14:38:56,073 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:38:56,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:38:56,073 INFO L85 PathProgramCache]: Analyzing trace with hash -367168689, now seen corresponding path program 20 times [2023-11-23 14:38:56,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:38:56,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608309319] [2023-11-23 14:38:56,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:38:56,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:38:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:38:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:56,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:38:56,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608309319] [2023-11-23 14:38:56,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608309319] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:38:56,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484681001] [2023-11-23 14:38:56,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 14:38:56,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:38:56,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:38:56,992 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:38:56,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-23 14:38:57,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 14:38:57,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:38:57,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-23 14:38:57,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:38:57,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 14:38:57,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:38:57,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-23 14:38:58,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-23 14:38:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:58,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:38:59,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-23 14:38:59,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2023-11-23 14:38:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:38:59,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484681001] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:38:59,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:38:59,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 87 [2023-11-23 14:38:59,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534028998] [2023-11-23 14:38:59,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:38:59,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2023-11-23 14:38:59,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:38:59,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2023-11-23 14:38:59,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=7360, Unknown=0, NotChecked=0, Total=7656 [2023-11-23 14:38:59,731 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand has 88 states, 88 states have (on average 2.3181818181818183) internal successors, (204), 87 states have internal predecessors, (204), 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) [2023-11-23 14:39:01,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:01,488 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2023-11-23 14:39:01,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-23 14:39:01,488 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.3181818181818183) internal successors, (204), 87 states have internal predecessors, (204), 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 69 [2023-11-23 14:39:01,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:01,489 INFO L225 Difference]: With dead ends: 95 [2023-11-23 14:39:01,489 INFO L226 Difference]: Without dead ends: 93 [2023-11-23 14:39:01,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2576 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=586, Invalid=11846, Unknown=0, NotChecked=0, Total=12432 [2023-11-23 14:39:01,490 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 106 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 3086 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 3099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 3086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:01,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 725 Invalid, 3099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 3086 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 14:39:01,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-23 14:39:01,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2023-11-23 14:39:01,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.1318681318681318) internal successors, (103), 91 states have internal predecessors, (103), 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) [2023-11-23 14:39:01,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2023-11-23 14:39:01,507 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 69 [2023-11-23 14:39:01,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:01,508 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2023-11-23 14:39:01,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.3181818181818183) internal successors, (204), 87 states have internal predecessors, (204), 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) [2023-11-23 14:39:01,508 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2023-11-23 14:39:01,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-23 14:39:01,508 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:01,508 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 12, 11, 11, 1, 1, 1, 1, 1] [2023-11-23 14:39:01,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-23 14:39:01,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-23 14:39:01,709 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:01,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:01,709 INFO L85 PathProgramCache]: Analyzing trace with hash 964501442, now seen corresponding path program 21 times [2023-11-23 14:39:01,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:01,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253966040] [2023-11-23 14:39:01,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:01,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:02,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:02,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253966040] [2023-11-23 14:39:02,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253966040] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:02,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874691206] [2023-11-23 14:39:02,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 14:39:02,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:02,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:02,657 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:39:02,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-23 14:39:03,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2023-11-23 14:39:03,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:39:03,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-23 14:39:03,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:03,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-23 14:39:04,362 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-23 14:39:04,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-23 14:39:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 176 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:04,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:05,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-23 14:39:05,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2023-11-23 14:39:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 155 proven. 304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:06,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874691206] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:39:06,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:39:06,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 32] total 78 [2023-11-23 14:39:06,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858795686] [2023-11-23 14:39:06,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:39:06,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-11-23 14:39:06,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:06,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-11-23 14:39:06,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=718, Invalid=5444, Unknown=0, NotChecked=0, Total=6162 [2023-11-23 14:39:06,284 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 79 states, 79 states have (on average 2.3544303797468356) internal successors, (186), 78 states have internal predecessors, (186), 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) [2023-11-23 14:39:07,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:07,938 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2023-11-23 14:39:07,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-23 14:39:07,939 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.3544303797468356) internal successors, (186), 78 states have internal predecessors, (186), 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 72 [2023-11-23 14:39:07,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:07,939 INFO L225 Difference]: With dead ends: 132 [2023-11-23 14:39:07,940 INFO L226 Difference]: Without dead ends: 92 [2023-11-23 14:39:07,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1301, Invalid=9829, Unknown=0, NotChecked=0, Total=11130 [2023-11-23 14:39:07,941 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 50 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 1692 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:07,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 327 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1692 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 14:39:07,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-23 14:39:07,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-11-23 14:39:07,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.120879120879121) internal successors, (102), 91 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:39:07,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2023-11-23 14:39:07,956 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 72 [2023-11-23 14:39:07,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:07,956 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2023-11-23 14:39:07,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.3544303797468356) internal successors, (186), 78 states have internal predecessors, (186), 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) [2023-11-23 14:39:07,956 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2023-11-23 14:39:07,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-23 14:39:07,957 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:07,957 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 12, 11, 11, 1, 1, 1, 1, 1] [2023-11-23 14:39:07,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-23 14:39:08,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:08,157 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:08,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:08,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1400725253, now seen corresponding path program 22 times [2023-11-23 14:39:08,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:08,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782528431] [2023-11-23 14:39:08,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:08,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 0 proven. 493 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:09,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:09,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782528431] [2023-11-23 14:39:09,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782528431] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:09,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226209208] [2023-11-23 14:39:09,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 14:39:09,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:09,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:09,131 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:39:09,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-23 14:39:09,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 14:39:09,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:39:09,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 82 conjunts are in the unsatisfiable core [2023-11-23 14:39:09,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:09,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-23 14:39:09,639 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-23 14:39:09,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-23 14:39:10,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-11-23 14:39:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 0 proven. 493 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:10,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:10,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-23 14:39:10,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2023-11-23 14:39:11,568 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 0 proven. 493 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:11,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226209208] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:39:11,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:39:11,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 77 [2023-11-23 14:39:11,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864271696] [2023-11-23 14:39:11,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:39:11,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-11-23 14:39:11,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:11,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-11-23 14:39:11,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=5765, Unknown=0, NotChecked=0, Total=6006 [2023-11-23 14:39:11,570 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand has 78 states, 78 states have (on average 2.41025641025641) internal successors, (188), 77 states have internal predecessors, (188), 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) [2023-11-23 14:39:13,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:13,289 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2023-11-23 14:39:13,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-23 14:39:13,289 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.41025641025641) internal successors, (188), 77 states have internal predecessors, (188), 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 74 [2023-11-23 14:39:13,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:13,289 INFO L225 Difference]: With dead ends: 98 [2023-11-23 14:39:13,289 INFO L226 Difference]: Without dead ends: 96 [2023-11-23 14:39:13,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1679 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=526, Invalid=9980, Unknown=0, NotChecked=0, Total=10506 [2023-11-23 14:39:13,291 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 96 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 2841 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 2855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:13,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 643 Invalid, 2855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2841 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 14:39:13,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-23 14:39:13,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2023-11-23 14:39:13,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 94 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:39:13,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2023-11-23 14:39:13,321 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 74 [2023-11-23 14:39:13,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:13,321 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2023-11-23 14:39:13,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.41025641025641) internal successors, (188), 77 states have internal predecessors, (188), 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) [2023-11-23 14:39:13,321 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2023-11-23 14:39:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-23 14:39:13,322 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:13,322 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 13, 12, 12, 1, 1, 1, 1, 1] [2023-11-23 14:39:13,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-23 14:39:13,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:13,524 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:13,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:13,525 INFO L85 PathProgramCache]: Analyzing trace with hash 901448342, now seen corresponding path program 23 times [2023-11-23 14:39:13,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:13,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644089195] [2023-11-23 14:39:13,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:13,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:14,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:14,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644089195] [2023-11-23 14:39:14,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644089195] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:14,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672142200] [2023-11-23 14:39:14,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 14:39:14,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:14,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:14,414 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:39:14,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-23 14:39:14,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2023-11-23 14:39:14,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:39:14,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 86 conjunts are in the unsatisfiable core [2023-11-23 14:39:14,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:15,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 14:39:16,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-23 14:39:16,076 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:16,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:16,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-23 14:39:16,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-23 14:39:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:17,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672142200] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:39:17,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:39:17,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 96 [2023-11-23 14:39:17,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82755203] [2023-11-23 14:39:17,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:39:17,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-11-23 14:39:17,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:17,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-11-23 14:39:17,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=8989, Unknown=0, NotChecked=0, Total=9312 [2023-11-23 14:39:17,660 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 97 states, 97 states have (on average 2.350515463917526) internal successors, (228), 96 states have internal predecessors, (228), 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) [2023-11-23 14:39:19,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:19,506 INFO L93 Difference]: Finished difference Result 142 states and 152 transitions. [2023-11-23 14:39:19,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-23 14:39:19,506 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.350515463917526) internal successors, (228), 96 states have internal predecessors, (228), 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 77 [2023-11-23 14:39:19,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:19,507 INFO L225 Difference]: With dead ends: 142 [2023-11-23 14:39:19,507 INFO L226 Difference]: Without dead ends: 140 [2023-11-23 14:39:19,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2480 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=465, Invalid=11967, Unknown=0, NotChecked=0, Total=12432 [2023-11-23 14:39:19,510 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 23 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 4091 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 4093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:19,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 1170 Invalid, 4093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4091 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-23 14:39:19,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-23 14:39:19,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2023-11-23 14:39:19,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1122448979591837) internal successors, (109), 98 states have internal predecessors, (109), 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) [2023-11-23 14:39:19,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2023-11-23 14:39:19,530 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 77 [2023-11-23 14:39:19,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:19,530 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2023-11-23 14:39:19,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.350515463917526) internal successors, (228), 96 states have internal predecessors, (228), 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) [2023-11-23 14:39:19,531 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2023-11-23 14:39:19,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-23 14:39:19,531 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:19,531 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 13, 12, 12, 1, 1, 1, 1, 1] [2023-11-23 14:39:19,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-23 14:39:19,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:19,736 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:19,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:19,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1614961917, now seen corresponding path program 24 times [2023-11-23 14:39:19,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:19,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904090943] [2023-11-23 14:39:19,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:19,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:20,821 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 564 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:20,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:20,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904090943] [2023-11-23 14:39:20,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904090943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:20,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240337865] [2023-11-23 14:39:20,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 14:39:20,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:20,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:20,824 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:39:20,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-23 14:39:21,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2023-11-23 14:39:21,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:39:21,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 95 conjunts are in the unsatisfiable core [2023-11-23 14:39:21,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:21,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-23 14:39:22,035 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-23 14:39:22,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-23 14:39:22,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-11-23 14:39:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 564 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:22,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:23,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-23 14:39:23,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-23 14:39:24,102 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 564 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:24,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240337865] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:39:24,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:39:24,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 84 [2023-11-23 14:39:24,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001075683] [2023-11-23 14:39:24,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:39:24,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2023-11-23 14:39:24,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:24,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2023-11-23 14:39:24,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=6870, Unknown=0, NotChecked=0, Total=7140 [2023-11-23 14:39:24,105 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 85 states, 85 states have (on average 2.364705882352941) internal successors, (201), 84 states have internal predecessors, (201), 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) [2023-11-23 14:39:26,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:26,216 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2023-11-23 14:39:26,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-23 14:39:26,216 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.364705882352941) internal successors, (201), 84 states have internal predecessors, (201), 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 79 [2023-11-23 14:39:26,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:26,217 INFO L225 Difference]: With dead ends: 140 [2023-11-23 14:39:26,217 INFO L226 Difference]: Without dead ends: 138 [2023-11-23 14:39:26,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2118 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=607, Invalid=12275, Unknown=0, NotChecked=0, Total=12882 [2023-11-23 14:39:26,218 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 149 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 3439 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 3457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 3439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:26,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 724 Invalid, 3457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 3439 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 14:39:26,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-23 14:39:26,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 98. [2023-11-23 14:39:26,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.1134020618556701) internal successors, (108), 97 states have internal predecessors, (108), 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) [2023-11-23 14:39:26,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2023-11-23 14:39:26,238 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 79 [2023-11-23 14:39:26,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:26,238 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2023-11-23 14:39:26,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.364705882352941) internal successors, (201), 84 states have internal predecessors, (201), 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) [2023-11-23 14:39:26,238 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2023-11-23 14:39:26,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-23 14:39:26,239 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:26,239 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 14, 13, 13, 1, 1, 1, 1, 1] [2023-11-23 14:39:26,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-23 14:39:26,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-23 14:39:26,444 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:26,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:26,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1377732837, now seen corresponding path program 25 times [2023-11-23 14:39:26,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:26,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008362730] [2023-11-23 14:39:26,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:26,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:26,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:26,940 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 260 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:26,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:26,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008362730] [2023-11-23 14:39:26,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008362730] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:26,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780061153] [2023-11-23 14:39:26,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 14:39:26,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:26,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:26,942 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:39:26,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-23 14:39:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:27,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-23 14:39:27,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 260 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:27,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 260 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:27,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780061153] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:39:27,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:39:27,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 48 [2023-11-23 14:39:27,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671655668] [2023-11-23 14:39:27,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:39:27,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-23 14:39:27,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:27,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-23 14:39:27,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=1785, Unknown=0, NotChecked=0, Total=2352 [2023-11-23 14:39:27,856 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand has 49 states, 49 states have (on average 2.5306122448979593) internal successors, (124), 48 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:39:28,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:28,019 INFO L93 Difference]: Finished difference Result 144 states and 154 transitions. [2023-11-23 14:39:28,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-23 14:39:28,019 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.5306122448979593) internal successors, (124), 48 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2023-11-23 14:39:28,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:28,020 INFO L225 Difference]: With dead ends: 144 [2023-11-23 14:39:28,020 INFO L226 Difference]: Without dead ends: 98 [2023-11-23 14:39:28,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 113 SyntacticMatches, 31 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=567, Invalid=1785, Unknown=0, NotChecked=0, Total=2352 [2023-11-23 14:39:28,021 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:28,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 146 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:39:28,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-23 14:39:28,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2023-11-23 14:39:28,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.1030927835051547) internal successors, (107), 97 states have internal predecessors, (107), 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) [2023-11-23 14:39:28,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2023-11-23 14:39:28,042 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 80 [2023-11-23 14:39:28,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:28,042 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2023-11-23 14:39:28,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.5306122448979593) internal successors, (124), 48 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:39:28,042 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2023-11-23 14:39:28,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-23 14:39:28,043 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:28,043 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 14, 13, 13, 1, 1, 1, 1, 1] [2023-11-23 14:39:28,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-23 14:39:28,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:28,257 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:28,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:28,257 INFO L85 PathProgramCache]: Analyzing trace with hash -887967916, now seen corresponding path program 26 times [2023-11-23 14:39:28,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:28,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701986581] [2023-11-23 14:39:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:28,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:29,368 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:29,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:29,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701986581] [2023-11-23 14:39:29,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701986581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:29,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761159853] [2023-11-23 14:39:29,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 14:39:29,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:29,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:29,372 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:39:29,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-23 14:39:29,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 14:39:29,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:39:29,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-23 14:39:29,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:29,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-23 14:39:30,662 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-23 14:39:30,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-23 14:39:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 247 proven. 355 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:30,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:31,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-23 14:39:31,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2023-11-23 14:39:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 234 proven. 368 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:32,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761159853] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:39:32,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:39:32,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 86 [2023-11-23 14:39:32,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917862942] [2023-11-23 14:39:32,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:39:32,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2023-11-23 14:39:32,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:32,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2023-11-23 14:39:32,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=859, Invalid=6623, Unknown=0, NotChecked=0, Total=7482 [2023-11-23 14:39:32,899 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand has 87 states, 87 states have (on average 2.4367816091954024) internal successors, (212), 86 states have internal predecessors, (212), 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) [2023-11-23 14:39:34,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:34,920 INFO L93 Difference]: Finished difference Result 144 states and 153 transitions. [2023-11-23 14:39:34,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-23 14:39:34,920 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.4367816091954024) internal successors, (212), 86 states have internal predecessors, (212), 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 82 [2023-11-23 14:39:34,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:34,921 INFO L225 Difference]: With dead ends: 144 [2023-11-23 14:39:34,921 INFO L226 Difference]: Without dead ends: 98 [2023-11-23 14:39:34,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2245 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1545, Invalid=12027, Unknown=0, NotChecked=0, Total=13572 [2023-11-23 14:39:34,922 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 50 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 2005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:34,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 373 Invalid, 2005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2002 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 14:39:34,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-23 14:39:34,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2023-11-23 14:39:34,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.092783505154639) internal successors, (106), 97 states have internal predecessors, (106), 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) [2023-11-23 14:39:34,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2023-11-23 14:39:34,944 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 82 [2023-11-23 14:39:34,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:34,944 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2023-11-23 14:39:34,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.4367816091954024) internal successors, (212), 86 states have internal predecessors, (212), 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) [2023-11-23 14:39:34,944 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2023-11-23 14:39:34,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-23 14:39:34,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:34,945 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 14, 13, 13, 1, 1, 1, 1, 1] [2023-11-23 14:39:34,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-23 14:39:35,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:35,160 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:35,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:35,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1624685901, now seen corresponding path program 27 times [2023-11-23 14:39:35,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:35,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335594462] [2023-11-23 14:39:35,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:35,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:36,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:36,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335594462] [2023-11-23 14:39:36,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335594462] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:36,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661059056] [2023-11-23 14:39:36,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 14:39:36,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:36,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:36,372 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:39:36,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-23 14:39:37,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2023-11-23 14:39:37,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:39:37,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 100 conjunts are in the unsatisfiable core [2023-11-23 14:39:37,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:38,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-23 14:39:38,060 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-23 14:39:38,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-23 14:39:38,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-11-23 14:39:38,721 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:38,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:39,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-23 14:39:39,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-23 14:39:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:40,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661059056] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:39:40,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:39:40,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 89 [2023-11-23 14:39:40,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206146182] [2023-11-23 14:39:40,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:39:40,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2023-11-23 14:39:40,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:40,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2023-11-23 14:39:40,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=7724, Unknown=0, NotChecked=0, Total=8010 [2023-11-23 14:39:40,355 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand has 90 states, 90 states have (on average 2.3777777777777778) internal successors, (214), 89 states have internal predecessors, (214), 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) [2023-11-23 14:39:42,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:42,836 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2023-11-23 14:39:42,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-23 14:39:42,836 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.3777777777777778) internal successors, (214), 89 states have internal predecessors, (214), 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 84 [2023-11-23 14:39:42,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:42,837 INFO L225 Difference]: With dead ends: 104 [2023-11-23 14:39:42,837 INFO L226 Difference]: Without dead ends: 102 [2023-11-23 14:39:42,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2394 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=646, Invalid=13874, Unknown=0, NotChecked=0, Total=14520 [2023-11-23 14:39:42,838 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 116 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 4266 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 4283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 4266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:42,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 909 Invalid, 4283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 4266 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-23 14:39:42,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-23 14:39:42,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2023-11-23 14:39:42,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.09) internal successors, (109), 100 states have internal predecessors, (109), 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) [2023-11-23 14:39:42,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2023-11-23 14:39:42,860 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 84 [2023-11-23 14:39:42,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:42,860 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2023-11-23 14:39:42,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.3777777777777778) internal successors, (214), 89 states have internal predecessors, (214), 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) [2023-11-23 14:39:42,861 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2023-11-23 14:39:42,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-23 14:39:42,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:42,861 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 15, 14, 14, 1, 1, 1, 1, 1] [2023-11-23 14:39:42,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-23 14:39:43,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-23 14:39:43,062 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:43,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:43,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1036430596, now seen corresponding path program 28 times [2023-11-23 14:39:43,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:43,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036002413] [2023-11-23 14:39:43,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:43,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:44,251 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:44,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:44,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036002413] [2023-11-23 14:39:44,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036002413] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:44,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721625374] [2023-11-23 14:39:44,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 14:39:44,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:44,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:44,252 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:39:44,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-23 14:39:44,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 14:39:44,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:39:44,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 83 conjunts are in the unsatisfiable core [2023-11-23 14:39:44,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:45,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-23 14:39:46,219 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-23 14:39:46,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-23 14:39:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 287 proven. 394 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:46,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:47,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-23 14:39:47,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2023-11-23 14:39:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 273 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:48,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721625374] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:39:48,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:39:48,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 91 [2023-11-23 14:39:48,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822111987] [2023-11-23 14:39:48,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:39:48,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2023-11-23 14:39:48,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:48,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2023-11-23 14:39:48,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=953, Invalid=7419, Unknown=0, NotChecked=0, Total=8372 [2023-11-23 14:39:48,660 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand has 92 states, 92 states have (on average 2.4456521739130435) internal successors, (225), 91 states have internal predecessors, (225), 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) [2023-11-23 14:39:50,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:50,936 INFO L93 Difference]: Finished difference Result 150 states and 158 transitions. [2023-11-23 14:39:50,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-23 14:39:50,936 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.4456521739130435) internal successors, (225), 91 states have internal predecessors, (225), 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 87 [2023-11-23 14:39:50,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:50,937 INFO L225 Difference]: With dead ends: 150 [2023-11-23 14:39:50,937 INFO L226 Difference]: Without dead ends: 101 [2023-11-23 14:39:50,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2521 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1717, Invalid=13535, Unknown=0, NotChecked=0, Total=15252 [2023-11-23 14:39:50,938 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 2577 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 2580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:50,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 545 Invalid, 2580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2577 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 14:39:50,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-23 14:39:50,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-11-23 14:39:50,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.08) internal successors, (108), 100 states have internal predecessors, (108), 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) [2023-11-23 14:39:50,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2023-11-23 14:39:50,970 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 87 [2023-11-23 14:39:50,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:50,970 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2023-11-23 14:39:50,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.4456521739130435) internal successors, (225), 91 states have internal predecessors, (225), 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) [2023-11-23 14:39:50,970 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2023-11-23 14:39:50,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-23 14:39:50,970 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:50,970 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 15, 14, 14, 1, 1, 1, 1, 1] [2023-11-23 14:39:50,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-23 14:39:51,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-23 14:39:51,171 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:51,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:51,171 INFO L85 PathProgramCache]: Analyzing trace with hash 2053730987, now seen corresponding path program 29 times [2023-11-23 14:39:51,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:51,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74672229] [2023-11-23 14:39:51,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:51,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:52,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:52,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74672229] [2023-11-23 14:39:52,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74672229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:52,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202271053] [2023-11-23 14:39:52,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 14:39:52,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:52,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:52,401 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:39:52,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-23 14:39:53,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2023-11-23 14:39:53,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:39:53,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 99 conjunts are in the unsatisfiable core [2023-11-23 14:39:53,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:53,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 14:39:53,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:39:53,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-23 14:39:54,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-23 14:39:54,814 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:54,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:55,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-23 14:39:55,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2023-11-23 14:39:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:56,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202271053] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:39:56,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:39:56,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 111 [2023-11-23 14:39:56,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838556749] [2023-11-23 14:39:56,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:39:56,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2023-11-23 14:39:56,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:56,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2023-11-23 14:39:56,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=12052, Unknown=0, NotChecked=0, Total=12432 [2023-11-23 14:39:56,852 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand has 112 states, 112 states have (on average 2.357142857142857) internal successors, (264), 111 states have internal predecessors, (264), 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) [2023-11-23 14:39:59,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:59,446 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2023-11-23 14:39:59,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-23 14:39:59,446 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.357142857142857) internal successors, (264), 111 states have internal predecessors, (264), 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 89 [2023-11-23 14:39:59,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:59,447 INFO L225 Difference]: With dead ends: 107 [2023-11-23 14:39:59,447 INFO L226 Difference]: Without dead ends: 105 [2023-11-23 14:39:59,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4312 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=770, Invalid=19822, Unknown=0, NotChecked=0, Total=20592 [2023-11-23 14:39:59,449 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 130 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 4339 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 4356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 4339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:59,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 1024 Invalid, 4356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 4339 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-23 14:39:59,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-23 14:39:59,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2023-11-23 14:39:59,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0776699029126213) internal successors, (111), 103 states have internal predecessors, (111), 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) [2023-11-23 14:39:59,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 111 transitions. [2023-11-23 14:39:59,473 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 111 transitions. Word has length 89 [2023-11-23 14:39:59,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:59,473 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 111 transitions. [2023-11-23 14:39:59,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.357142857142857) internal successors, (264), 111 states have internal predecessors, (264), 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) [2023-11-23 14:39:59,473 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 111 transitions. [2023-11-23 14:39:59,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-23 14:39:59,474 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:59,474 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 16, 15, 15, 1, 1, 1, 1, 1] [2023-11-23 14:39:59,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-23 14:39:59,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-23 14:39:59,680 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:59,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:59,681 INFO L85 PathProgramCache]: Analyzing trace with hash 895914726, now seen corresponding path program 30 times [2023-11-23 14:39:59,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:59,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218128706] [2023-11-23 14:39:59,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:59,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:40:00,852 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 765 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:40:00,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:40:00,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218128706] [2023-11-23 14:40:00,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218128706] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:40:00,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419764040] [2023-11-23 14:40:00,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 14:40:00,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:40:00,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:40:00,853 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:40:00,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-23 14:40:02,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2023-11-23 14:40:02,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:40:02,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 92 conjunts are in the unsatisfiable core [2023-11-23 14:40:02,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:40:02,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-23 14:40:03,785 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-23 14:40:03,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-23 14:40:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 322 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:40:03,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:40:05,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-23 14:40:05,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2023-11-23 14:40:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 309 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:40:06,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419764040] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:40:06,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:40:06,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 40] total 98 [2023-11-23 14:40:06,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895308622] [2023-11-23 14:40:06,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:40:06,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2023-11-23 14:40:06,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:40:06,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2023-11-23 14:40:06,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1092, Invalid=8610, Unknown=0, NotChecked=0, Total=9702 [2023-11-23 14:40:06,633 INFO L87 Difference]: Start difference. First operand 104 states and 111 transitions. Second operand has 99 states, 99 states have (on average 2.404040404040404) internal successors, (238), 98 states have internal predecessors, (238), 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) [2023-11-23 14:40:09,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:40:09,621 INFO L93 Difference]: Finished difference Result 156 states and 163 transitions. [2023-11-23 14:40:09,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-23 14:40:09,621 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.404040404040404) internal successors, (238), 98 states have internal predecessors, (238), 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 92 [2023-11-23 14:40:09,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:40:09,622 INFO L225 Difference]: With dead ends: 156 [2023-11-23 14:40:09,622 INFO L226 Difference]: Without dead ends: 104 [2023-11-23 14:40:09,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3475 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2275, Invalid=17747, Unknown=0, NotChecked=0, Total=20022 [2023-11-23 14:40:09,623 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 2850 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 2863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:40:09,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 272 Invalid, 2863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2850 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 14:40:09,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-23 14:40:09,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2023-11-23 14:40:09,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 103 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:40:09,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2023-11-23 14:40:09,651 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 92 [2023-11-23 14:40:09,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:40:09,651 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2023-11-23 14:40:09,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.404040404040404) internal successors, (238), 98 states have internal predecessors, (238), 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) [2023-11-23 14:40:09,652 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2023-11-23 14:40:09,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-23 14:40:09,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:40:09,652 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 16, 15, 15, 1, 1, 1, 1, 1] [2023-11-23 14:40:09,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-23 14:40:09,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-23 14:40:09,853 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:40:09,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:40:09,854 INFO L85 PathProgramCache]: Analyzing trace with hash -709870177, now seen corresponding path program 31 times [2023-11-23 14:40:09,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:40:09,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690697956] [2023-11-23 14:40:09,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:40:09,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:40:09,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:40:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 0 proven. 807 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:40:11,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:40:11,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690697956] [2023-11-23 14:40:11,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690697956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:40:11,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885169531] [2023-11-23 14:40:11,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 14:40:11,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:40:11,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:40:11,240 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:40:11,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-23 14:40:11,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:40:11,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 107 conjunts are in the unsatisfiable core [2023-11-23 14:40:11,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:40:12,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 14:40:12,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:40:12,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-23 14:40:13,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-23 14:40:13,367 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 0 proven. 807 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:40:13,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:40:14,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-23 14:40:14,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2023-11-23 14:40:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 0 proven. 807 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:40:15,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885169531] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:40:15,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:40:15,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 117 [2023-11-23 14:40:15,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493335027] [2023-11-23 14:40:15,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:40:15,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2023-11-23 14:40:15,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:40:15,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2023-11-23 14:40:15,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=13405, Unknown=0, NotChecked=0, Total=13806 [2023-11-23 14:40:15,575 INFO L87 Difference]: Start difference. First operand 104 states and 110 transitions. Second operand has 118 states, 118 states have (on average 2.364406779661017) internal successors, (279), 117 states have internal predecessors, (279), 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) [2023-11-23 14:40:18,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:40:18,695 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2023-11-23 14:40:18,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-23 14:40:18,695 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.364406779661017) internal successors, (279), 117 states have internal predecessors, (279), 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 94 [2023-11-23 14:40:18,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:40:18,695 INFO L225 Difference]: With dead ends: 110 [2023-11-23 14:40:18,696 INFO L226 Difference]: Without dead ends: 108 [2023-11-23 14:40:18,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4777 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=816, Invalid=22136, Unknown=0, NotChecked=0, Total=22952 [2023-11-23 14:40:18,697 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 124 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 5322 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 5340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 5322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-23 14:40:18,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 1296 Invalid, 5340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 5322 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-23 14:40:18,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-23 14:40:18,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2023-11-23 14:40:18,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0660377358490567) internal successors, (113), 106 states have internal predecessors, (113), 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) [2023-11-23 14:40:18,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2023-11-23 14:40:18,726 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 94 [2023-11-23 14:40:18,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:40:18,727 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2023-11-23 14:40:18,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.364406779661017) internal successors, (279), 117 states have internal predecessors, (279), 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) [2023-11-23 14:40:18,727 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2023-11-23 14:40:18,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-23 14:40:18,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:40:18,727 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 17, 16, 16, 1, 1, 1, 1, 1] [2023-11-23 14:40:18,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-23 14:40:18,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-23 14:40:18,928 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:40:18,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:40:18,928 INFO L85 PathProgramCache]: Analyzing trace with hash 681735026, now seen corresponding path program 32 times [2023-11-23 14:40:18,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:40:18,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597292203] [2023-11-23 14:40:18,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:40:18,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:40:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:40:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 0 proven. 854 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:40:20,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:40:20,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597292203] [2023-11-23 14:40:20,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597292203] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:40:20,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244642339] [2023-11-23 14:40:20,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 14:40:20,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:40:20,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:40:20,226 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:40:20,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-23 14:40:20,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 14:40:20,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:40:20,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 104 conjunts are in the unsatisfiable core [2023-11-23 14:40:20,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:40:20,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-23 14:40:21,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-11-23 14:40:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 0 proven. 854 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:40:21,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:40:22,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-23 14:40:22,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-23 14:40:23,461 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 0 proven. 854 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:40:23,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244642339] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:40:23,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:40:23,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 99 [2023-11-23 14:40:23,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779775751] [2023-11-23 14:40:23,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:40:23,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-11-23 14:40:23,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:40:23,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-11-23 14:40:23,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=9593, Unknown=0, NotChecked=0, Total=9900 [2023-11-23 14:40:23,464 INFO L87 Difference]: Start difference. First operand 107 states and 113 transitions. Second operand has 100 states, 100 states have (on average 2.46) internal successors, (246), 99 states have internal predecessors, (246), 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) [2023-11-23 14:40:25,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:40:25,923 INFO L93 Difference]: Finished difference Result 166 states and 172 transitions. [2023-11-23 14:40:25,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-23 14:40:25,923 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.46) internal successors, (246), 99 states have internal predecessors, (246), 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 97 [2023-11-23 14:40:25,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:40:25,924 INFO L225 Difference]: With dead ends: 166 [2023-11-23 14:40:25,924 INFO L226 Difference]: Without dead ends: 164 [2023-11-23 14:40:25,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2146 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=466, Invalid=13340, Unknown=0, NotChecked=0, Total=13806 [2023-11-23 14:40:25,926 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 21 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 5360 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 5362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-23 14:40:25,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1471 Invalid, 5362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5360 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-23 14:40:25,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-11-23 14:40:25,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 111. [2023-11-23 14:40:25,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0636363636363637) internal successors, (117), 110 states have internal predecessors, (117), 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) [2023-11-23 14:40:25,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 117 transitions. [2023-11-23 14:40:25,954 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 117 transitions. Word has length 97 [2023-11-23 14:40:25,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:40:25,955 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 117 transitions. [2023-11-23 14:40:25,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.46) internal successors, (246), 99 states have internal predecessors, (246), 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) [2023-11-23 14:40:25,955 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 117 transitions. [2023-11-23 14:40:25,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-23 14:40:25,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:40:25,956 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 17, 16, 16, 1, 1, 1, 1, 1] [2023-11-23 14:40:25,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-11-23 14:40:26,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-23 14:40:26,161 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:40:26,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:40:26,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1585212327, now seen corresponding path program 33 times [2023-11-23 14:40:26,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:40:26,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948550377] [2023-11-23 14:40:26,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:40:26,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:40:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:40:27,566 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 0 proven. 898 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:40:27,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:40:27,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948550377] [2023-11-23 14:40:27,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948550377] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:40:27,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197601677] [2023-11-23 14:40:27,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 14:40:27,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:40:27,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:40:27,568 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:40:27,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-23 14:40:31,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2023-11-23 14:40:31,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:40:31,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 115 conjunts are in the unsatisfiable core [2023-11-23 14:40:31,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:40:31,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-23 14:40:31,471 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-23 14:40:31,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-23 14:40:32,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-11-23 14:40:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 0 proven. 898 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:40:32,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:40:33,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-23 14:40:33,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-23 14:40:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 0 proven. 898 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:40:34,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197601677] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:40:34,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:40:34,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43, 43] total 104 [2023-11-23 14:40:34,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942198120] [2023-11-23 14:40:34,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:40:34,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2023-11-23 14:40:34,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:40:34,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2023-11-23 14:40:34,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=10586, Unknown=0, NotChecked=0, Total=10920 [2023-11-23 14:40:34,733 INFO L87 Difference]: Start difference. First operand 111 states and 117 transitions. Second operand has 105 states, 105 states have (on average 2.4095238095238094) internal successors, (253), 104 states have internal predecessors, (253), 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) [2023-11-23 14:40:38,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:40:38,167 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2023-11-23 14:40:38,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-23 14:40:38,167 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.4095238095238094) internal successors, (253), 104 states have internal predecessors, (253), 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 99 [2023-11-23 14:40:38,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:40:38,168 INFO L225 Difference]: With dead ends: 164 [2023-11-23 14:40:38,168 INFO L226 Difference]: Without dead ends: 162 [2023-11-23 14:40:38,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3324 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=763, Invalid=19259, Unknown=0, NotChecked=0, Total=20022 [2023-11-23 14:40:38,172 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 191 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 5667 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 5688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 5667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-23 14:40:38,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 1203 Invalid, 5688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 5667 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-23 14:40:38,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-23 14:40:38,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 110. [2023-11-23 14:40:38,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0642201834862386) internal successors, (116), 109 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:40:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2023-11-23 14:40:38,202 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 99 [2023-11-23 14:40:38,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:40:38,202 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2023-11-23 14:40:38,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.4095238095238094) internal successors, (253), 104 states have internal predecessors, (253), 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) [2023-11-23 14:40:38,203 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2023-11-23 14:40:38,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-23 14:40:38,203 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:40:38,203 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 18, 17, 17, 1, 1, 1, 1, 1] [2023-11-23 14:40:38,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-11-23 14:40:38,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-11-23 14:40:38,404 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:40:38,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:40:38,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1326970689, now seen corresponding path program 34 times [2023-11-23 14:40:38,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:40:38,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998931776] [2023-11-23 14:40:38,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:40:38,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:40:38,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:40:39,125 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 442 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:40:39,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:40:39,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998931776] [2023-11-23 14:40:39,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998931776] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:40:39,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929495826] [2023-11-23 14:40:39,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 14:40:39,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:40:39,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:40:39,127 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:40:39,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-23 14:40:40,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 14:40:40,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:40:40,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-23 14:40:40,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:40:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 442 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:40:41,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:40:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 442 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:40:41,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929495826] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:40:41,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:40:41,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 60 [2023-11-23 14:40:41,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795223853] [2023-11-23 14:40:41,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:40:41,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-23 14:40:41,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:40:41,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-23 14:40:41,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=2793, Unknown=0, NotChecked=0, Total=3660 [2023-11-23 14:40:41,705 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand has 61 states, 61 states have (on average 2.557377049180328) internal successors, (156), 60 states have internal predecessors, (156), 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) [2023-11-23 14:40:41,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:40:41,915 INFO L93 Difference]: Finished difference Result 168 states and 174 transitions. [2023-11-23 14:40:41,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-23 14:40:41,915 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.557377049180328) internal successors, (156), 60 states have internal predecessors, (156), 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 100 [2023-11-23 14:40:41,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:40:41,915 INFO L225 Difference]: With dead ends: 168 [2023-11-23 14:40:41,916 INFO L226 Difference]: Without dead ends: 110 [2023-11-23 14:40:41,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 141 SyntacticMatches, 39 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2349 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=867, Invalid=2793, Unknown=0, NotChecked=0, Total=3660 [2023-11-23 14:40:41,916 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:40:41,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 153 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:40:41,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-23 14:40:41,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2023-11-23 14:40:41,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.055045871559633) internal successors, (115), 109 states have internal predecessors, (115), 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) [2023-11-23 14:40:41,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 115 transitions. [2023-11-23 14:40:41,949 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 115 transitions. Word has length 100 [2023-11-23 14:40:41,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:40:41,950 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 115 transitions. [2023-11-23 14:40:41,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.557377049180328) internal successors, (156), 60 states have internal predecessors, (156), 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) [2023-11-23 14:40:41,950 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 115 transitions. [2023-11-23 14:40:41,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-23 14:40:41,950 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:40:41,951 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 18, 17, 17, 1, 1, 1, 1, 1] [2023-11-23 14:40:41,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-11-23 14:40:42,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-11-23 14:40:42,152 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:40:42,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:40:42,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1889801608, now seen corresponding path program 35 times [2023-11-23 14:40:42,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:40:42,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93437325] [2023-11-23 14:40:42,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:40:42,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:40:42,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:40:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 948 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:40:43,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:40:43,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93437325] [2023-11-23 14:40:43,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93437325] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:40:43,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698750114] [2023-11-23 14:40:43,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 14:40:43,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:40:43,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:40:43,534 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:40:43,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-23 14:40:44,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2023-11-23 14:40:44,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:40:44,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 111 conjunts are in the unsatisfiable core [2023-11-23 14:40:44,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:40:45,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 14:40:46,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-23 14:40:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 948 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:40:46,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:40:48,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-23 14:40:48,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-23 14:40:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 948 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:40:49,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698750114] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:40:49,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:40:49,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 126 [2023-11-23 14:40:49,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326600188] [2023-11-23 14:40:49,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:40:49,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2023-11-23 14:40:49,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:40:49,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2023-11-23 14:40:49,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=15574, Unknown=0, NotChecked=0, Total=16002 [2023-11-23 14:40:49,610 INFO L87 Difference]: Start difference. First operand 110 states and 115 transitions. Second operand has 127 states, 127 states have (on average 2.3858267716535435) internal successors, (303), 126 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) [2023-11-23 14:40:52,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:40:52,750 INFO L93 Difference]: Finished difference Result 172 states and 177 transitions. [2023-11-23 14:40:52,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-23 14:40:52,750 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.3858267716535435) internal successors, (303), 126 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 102 [2023-11-23 14:40:52,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:40:52,751 INFO L225 Difference]: With dead ends: 172 [2023-11-23 14:40:52,751 INFO L226 Difference]: Without dead ends: 170 [2023-11-23 14:40:52,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4355 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=620, Invalid=20842, Unknown=0, NotChecked=0, Total=21462 [2023-11-23 14:40:52,752 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 1783 mSDsCounter, 0 mSdLazyCounter, 6454 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1808 SdHoareTripleChecker+Invalid, 6456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:40:52,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1808 Invalid, 6456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6454 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-23 14:40:52,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-23 14:40:52,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 114. [2023-11-23 14:40:52,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0530973451327434) internal successors, (119), 113 states have internal predecessors, (119), 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) [2023-11-23 14:40:52,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2023-11-23 14:40:52,792 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 102 [2023-11-23 14:40:52,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:40:52,792 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2023-11-23 14:40:52,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.3858267716535435) internal successors, (303), 126 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) [2023-11-23 14:40:52,793 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2023-11-23 14:40:52,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-23 14:40:52,793 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:40:52,793 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 18, 17, 17, 1, 1, 1, 1, 1] [2023-11-23 14:40:52,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-11-23 14:40:52,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:40:52,995 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:40:52,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:40:52,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1604435471, now seen corresponding path program 36 times [2023-11-23 14:40:52,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:40:52,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213654963] [2023-11-23 14:40:52,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:40:52,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:40:53,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:40:54,485 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 994 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:40:54,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:40:54,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213654963] [2023-11-23 14:40:54,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213654963] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:40:54,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155267943] [2023-11-23 14:40:54,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 14:40:54,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:40:54,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:40:54,487 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:40:54,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-23 14:40:57,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2023-11-23 14:40:57,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:40:57,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 120 conjunts are in the unsatisfiable core [2023-11-23 14:40:57,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:40:57,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-23 14:40:57,378 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-23 14:40:57,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-23 14:40:58,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-11-23 14:40:58,351 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 994 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:40:58,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:40:59,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-23 14:40:59,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-23 14:41:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 994 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:41:00,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155267943] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:41:00,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:41:00,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 45] total 109 [2023-11-23 14:41:00,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433953251] [2023-11-23 14:41:00,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:41:00,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2023-11-23 14:41:00,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:41:00,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2023-11-23 14:41:00,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=11640, Unknown=0, NotChecked=0, Total=11990 [2023-11-23 14:41:00,795 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand has 110 states, 110 states have (on average 2.418181818181818) internal successors, (266), 109 states have internal predecessors, (266), 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) [2023-11-23 14:41:04,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:41:04,387 INFO L93 Difference]: Finished difference Result 170 states and 175 transitions. [2023-11-23 14:41:04,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-23 14:41:04,388 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.418181818181818) internal successors, (266), 109 states have internal predecessors, (266), 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 104 [2023-11-23 14:41:04,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:41:04,389 INFO L225 Difference]: With dead ends: 170 [2023-11-23 14:41:04,389 INFO L226 Difference]: Without dead ends: 168 [2023-11-23 14:41:04,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3668 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=802, Invalid=21250, Unknown=0, NotChecked=0, Total=22052 [2023-11-23 14:41:04,391 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 139 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 5657 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 5679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 5657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-23 14:41:04,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1270 Invalid, 5679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 5657 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-23 14:41:04,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-23 14:41:04,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 113. [2023-11-23 14:41:04,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0535714285714286) internal successors, (118), 112 states have internal predecessors, (118), 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) [2023-11-23 14:41:04,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 118 transitions. [2023-11-23 14:41:04,445 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 118 transitions. Word has length 104 [2023-11-23 14:41:04,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:41:04,445 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 118 transitions. [2023-11-23 14:41:04,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.418181818181818) internal successors, (266), 109 states have internal predecessors, (266), 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) [2023-11-23 14:41:04,445 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 118 transitions. [2023-11-23 14:41:04,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-23 14:41:04,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:41:04,446 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 19, 18, 18, 1, 1, 1, 1, 1] [2023-11-23 14:41:04,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-11-23 14:41:04,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:41:04,668 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:41:04,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:41:04,669 INFO L85 PathProgramCache]: Analyzing trace with hash -643175431, now seen corresponding path program 37 times [2023-11-23 14:41:04,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:41:04,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461044816] [2023-11-23 14:41:04,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:41:04,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:41:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:41:05,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 495 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:41:05,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:41:05,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461044816] [2023-11-23 14:41:05,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461044816] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:41:05,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62922344] [2023-11-23 14:41:05,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 14:41:05,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:41:05,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:41:05,463 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:41:05,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-23 14:41:05,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:41:05,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-23 14:41:05,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:41:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 495 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:41:06,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:41:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 495 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:41:06,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62922344] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:41:06,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:41:06,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 63 [2023-11-23 14:41:06,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108550012] [2023-11-23 14:41:06,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:41:06,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-23 14:41:06,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:41:06,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-23 14:41:06,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=3080, Unknown=0, NotChecked=0, Total=4032 [2023-11-23 14:41:06,940 INFO L87 Difference]: Start difference. First operand 113 states and 118 transitions. Second operand has 64 states, 64 states have (on average 2.5625) internal successors, (164), 63 states have internal predecessors, (164), 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) [2023-11-23 14:41:07,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:41:07,163 INFO L93 Difference]: Finished difference Result 174 states and 179 transitions. [2023-11-23 14:41:07,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-23 14:41:07,163 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.5625) internal successors, (164), 63 states have internal predecessors, (164), 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 105 [2023-11-23 14:41:07,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:41:07,164 INFO L225 Difference]: With dead ends: 174 [2023-11-23 14:41:07,164 INFO L226 Difference]: Without dead ends: 113 [2023-11-23 14:41:07,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 148 SyntacticMatches, 41 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2593 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=952, Invalid=3080, Unknown=0, NotChecked=0, Total=4032 [2023-11-23 14:41:07,165 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:41:07,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 158 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:41:07,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-23 14:41:07,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-11-23 14:41:07,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0446428571428572) internal successors, (117), 112 states have internal predecessors, (117), 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) [2023-11-23 14:41:07,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2023-11-23 14:41:07,201 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 105 [2023-11-23 14:41:07,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:41:07,201 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2023-11-23 14:41:07,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.5625) internal successors, (164), 63 states have internal predecessors, (164), 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) [2023-11-23 14:41:07,202 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2023-11-23 14:41:07,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-23 14:41:07,202 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:41:07,202 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 19, 18, 18, 1, 1, 1, 1, 1] [2023-11-23 14:41:07,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-11-23 14:41:07,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-23 14:41:07,403 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:41:07,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:41:07,403 INFO L85 PathProgramCache]: Analyzing trace with hash 959133152, now seen corresponding path program 38 times [2023-11-23 14:41:07,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:41:07,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028131124] [2023-11-23 14:41:07,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:41:07,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:41:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:41:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 0 proven. 1047 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:41:08,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:41:08,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028131124] [2023-11-23 14:41:08,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028131124] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:41:08,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362217416] [2023-11-23 14:41:08,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 14:41:08,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:41:08,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:41:08,889 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:41:08,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-23 14:41:09,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 14:41:09,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:41:09,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 96 conjunts are in the unsatisfiable core [2023-11-23 14:41:09,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:41:09,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-23 14:41:10,872 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-23 14:41:10,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-23 14:41:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 477 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:41:10,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:41:12,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-23 14:41:12,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2023-11-23 14:41:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 459 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:41:14,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362217416] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:41:14,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:41:14,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 111 [2023-11-23 14:41:14,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194313561] [2023-11-23 14:41:14,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:41:14,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2023-11-23 14:41:14,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:41:14,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2023-11-23 14:41:14,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1379, Invalid=11053, Unknown=0, NotChecked=0, Total=12432 [2023-11-23 14:41:14,403 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand has 112 states, 112 states have (on average 2.4732142857142856) internal successors, (277), 111 states have internal predecessors, (277), 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) [2023-11-23 14:41:17,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:41:17,602 INFO L93 Difference]: Finished difference Result 174 states and 178 transitions. [2023-11-23 14:41:17,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-23 14:41:17,602 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.4732142857142856) internal successors, (277), 111 states have internal predecessors, (277), 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 107 [2023-11-23 14:41:17,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:41:17,603 INFO L225 Difference]: With dead ends: 174 [2023-11-23 14:41:17,603 INFO L226 Difference]: Without dead ends: 113 [2023-11-23 14:41:17,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3890 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2495, Invalid=20457, Unknown=0, NotChecked=0, Total=22952 [2023-11-23 14:41:17,604 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 65 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 3429 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 3432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 3429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-23 14:41:17,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 679 Invalid, 3432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 3429 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-23 14:41:17,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-23 14:41:17,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-11-23 14:41:17,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0357142857142858) internal successors, (116), 112 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:41:17,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2023-11-23 14:41:17,639 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 107 [2023-11-23 14:41:17,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:41:17,640 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2023-11-23 14:41:17,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.4732142857142856) internal successors, (277), 111 states have internal predecessors, (277), 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) [2023-11-23 14:41:17,640 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2023-11-23 14:41:17,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-23 14:41:17,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:41:17,640 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 19, 18, 18, 1, 1, 1, 1, 1] [2023-11-23 14:41:17,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-11-23 14:41:17,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-23 14:41:17,841 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:41:17,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:41:17,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1115577849, now seen corresponding path program 39 times [2023-11-23 14:41:17,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:41:17,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794572017] [2023-11-23 14:41:17,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:41:17,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:41:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:41:19,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 0 proven. 1095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:41:19,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:41:19,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794572017] [2023-11-23 14:41:19,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794572017] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:41:19,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086668260] [2023-11-23 14:41:19,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 14:41:19,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:41:19,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:41:19,377 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:41:19,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-23 14:41:24,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2023-11-23 14:41:24,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:41:24,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 125 conjunts are in the unsatisfiable core [2023-11-23 14:41:24,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:41:24,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-23 14:41:24,923 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-23 14:41:24,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-23 14:41:25,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-11-23 14:41:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 0 proven. 1095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:41:25,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:41:27,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-23 14:41:27,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-23 14:41:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 0 proven. 1095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:41:28,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086668260] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:41:28,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:41:28,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 47, 47] total 114 [2023-11-23 14:41:28,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568738219] [2023-11-23 14:41:28,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:41:28,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2023-11-23 14:41:28,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:41:28,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2023-11-23 14:41:28,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=12744, Unknown=0, NotChecked=0, Total=13110 [2023-11-23 14:41:28,678 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand has 115 states, 115 states have (on average 2.4260869565217393) internal successors, (279), 114 states have internal predecessors, (279), 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) [2023-11-23 14:41:32,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:41:32,587 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2023-11-23 14:41:32,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-23 14:41:32,587 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.4260869565217393) internal successors, (279), 114 states have internal predecessors, (279), 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 109 [2023-11-23 14:41:32,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:41:32,587 INFO L225 Difference]: With dead ends: 119 [2023-11-23 14:41:32,587 INFO L226 Difference]: Without dead ends: 117 [2023-11-23 14:41:32,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4029 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=841, Invalid=23339, Unknown=0, NotChecked=0, Total=24180 [2023-11-23 14:41:32,589 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 202 mSDsluCounter, 1327 mSDsCounter, 0 mSdLazyCounter, 6367 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1348 SdHoareTripleChecker+Invalid, 6390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 6367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:41:32,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 1348 Invalid, 6390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 6367 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-23 14:41:32,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-23 14:41:32,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2023-11-23 14:41:32,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0347826086956522) internal successors, (119), 115 states have internal predecessors, (119), 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) [2023-11-23 14:41:32,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 119 transitions. [2023-11-23 14:41:32,633 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 119 transitions. Word has length 109 [2023-11-23 14:41:32,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:41:32,634 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 119 transitions. [2023-11-23 14:41:32,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.4260869565217393) internal successors, (279), 114 states have internal predecessors, (279), 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) [2023-11-23 14:41:32,634 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 119 transitions. [2023-11-23 14:41:32,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-23 14:41:32,635 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:41:32,635 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 20, 19, 19, 1, 1, 1, 1, 1] [2023-11-23 14:41:32,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-11-23 14:41:32,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-23 14:41:32,835 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:41:32,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:41:32,836 INFO L85 PathProgramCache]: Analyzing trace with hash 282449418, now seen corresponding path program 40 times [2023-11-23 14:41:32,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:41:32,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999340744] [2023-11-23 14:41:32,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:41:32,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:41:32,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:41:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1151 backedges. 0 proven. 1151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:41:34,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:41:34,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999340744] [2023-11-23 14:41:34,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999340744] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:41:34,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423387951] [2023-11-23 14:41:34,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 14:41:34,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:41:34,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:41:34,402 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:41:34,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-23 14:41:36,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 14:41:36,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:41:36,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 100 conjunts are in the unsatisfiable core [2023-11-23 14:41:36,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:41:36,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-23 14:41:38,611 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-23 14:41:38,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-23 14:41:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1151 backedges. 532 proven. 619 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:41:38,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:41:40,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-23 14:41:40,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2023-11-23 14:41:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1151 backedges. 513 proven. 638 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:41:42,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423387951] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:41:42,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:41:42,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 116 [2023-11-23 14:41:42,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635135890] [2023-11-23 14:41:42,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:41:42,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2023-11-23 14:41:42,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:41:42,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2023-11-23 14:41:42,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1498, Invalid=12074, Unknown=0, NotChecked=0, Total=13572 [2023-11-23 14:41:42,549 INFO L87 Difference]: Start difference. First operand 116 states and 119 transitions. Second operand has 117 states, 117 states have (on average 2.4786324786324787) internal successors, (290), 116 states have internal predecessors, (290), 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) Killed by 15