./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/array-cav19/array_init_nondet_vars.c --full-output --preprocessor.use.memory.slicer true --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/array-cav19/array_init_nondet_vars.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 b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 21:57:23,425 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 21:57:23,460 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 21:57:23,462 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 21:57:23,463 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 21:57:23,475 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 21:57:23,476 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 21:57:23,476 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 21:57:23,476 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 21:57:23,477 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 21:57:23,477 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 21:57:23,477 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 21:57:23,477 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 21:57:23,478 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 21:57:23,478 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 21:57:23,478 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 21:57:23,479 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 21:57:23,479 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 21:57:23,479 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 21:57:23,479 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 21:57:23,479 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 21:57:23,480 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 21:57:23,480 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 21:57:23,480 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 21:57:23,481 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 21:57:23,481 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 21:57:23,481 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 21:57:23,481 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 21:57:23,481 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 21:57:23,482 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 21:57:23,482 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 21:57:23,482 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 21:57:23,482 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 21:57:23,483 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 21:57:23,483 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 21:57:23,483 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 21:57:23,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 21:57:23,483 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 21:57:23,483 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 21:57:23,484 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 21:57:23,484 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 21:57:23,484 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 21:57:23,484 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-22 21:57:23,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 21:57:23,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 21:57:23,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 21:57:23,651 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 21:57:23,651 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 21:57:23,652 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_init_nondet_vars.c [2023-11-22 21:57:24,715 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 21:57:24,879 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 21:57:24,879 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_init_nondet_vars.c [2023-11-22 21:57:24,885 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5263432af/05b153c83cf74d50b438da6f534aaf49/FLAG3f676b5dd [2023-11-22 21:57:24,896 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5263432af/05b153c83cf74d50b438da6f534aaf49 [2023-11-22 21:57:24,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 21:57:24,900 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 21:57:24,900 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 21:57:24,900 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 21:57:24,904 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 21:57:24,905 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:57:24" (1/1) ... [2023-11-22 21:57:24,906 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44652ed4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:57:24, skipping insertion in model container [2023-11-22 21:57:24,906 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:57:24" (1/1) ... [2023-11-22 21:57:24,919 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 21:57:25,047 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_nondet_vars.c[413,426] [2023-11-22 21:57:25,057 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 21:57:25,064 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 21:57:25,072 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_nondet_vars.c[413,426] [2023-11-22 21:57:25,076 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 21:57:25,086 INFO L206 MainTranslator]: Completed translation [2023-11-22 21:57:25,087 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:57:25 WrapperNode [2023-11-22 21:57:25,087 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 21:57:25,088 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 21:57:25,088 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 21:57:25,088 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 21:57:25,093 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:57:25" (1/1) ... [2023-11-22 21:57:25,098 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:57:25" (1/1) ... [2023-11-22 21:57:25,111 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2023-11-22 21:57:25,111 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 21:57:25,112 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 21:57:25,132 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 21:57:25,132 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 21:57:25,141 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:57:25" (1/1) ... [2023-11-22 21:57:25,164 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:57:25" (1/1) ... [2023-11-22 21:57:25,166 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:57:25" (1/1) ... [2023-11-22 21:57:25,182 INFO L189 HeapSplitter]: Split 4 memory accesses to 2 slices as follows [2, 2] [2023-11-22 21:57:25,182 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:57:25" (1/1) ... [2023-11-22 21:57:25,182 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:57:25" (1/1) ... [2023-11-22 21:57:25,194 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:57:25" (1/1) ... [2023-11-22 21:57:25,197 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:57:25" (1/1) ... [2023-11-22 21:57:25,197 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:57:25" (1/1) ... [2023-11-22 21:57:25,198 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:57:25" (1/1) ... [2023-11-22 21:57:25,199 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 21:57:25,200 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 21:57:25,200 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 21:57:25,200 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 21:57:25,203 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:57:25" (1/1) ... [2023-11-22 21:57:25,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 21:57:25,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:57:25,241 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 21:57:25,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 21:57:25,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 21:57:25,285 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-22 21:57:25,285 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-22 21:57:25,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 21:57:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-22 21:57:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 21:57:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-22 21:57:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-22 21:57:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 21:57:25,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 21:57:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-22 21:57:25,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-22 21:57:25,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 21:57:25,338 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 21:57:25,339 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 21:57:25,442 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 21:57:25,460 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 21:57:25,460 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-22 21:57:25,461 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:57:25 BoogieIcfgContainer [2023-11-22 21:57:25,461 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 21:57:25,462 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 21:57:25,463 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 21:57:25,465 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 21:57:25,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:57:24" (1/3) ... [2023-11-22 21:57:25,466 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4caaa5dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:57:25, skipping insertion in model container [2023-11-22 21:57:25,466 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:57:25" (2/3) ... [2023-11-22 21:57:25,466 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4caaa5dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:57:25, skipping insertion in model container [2023-11-22 21:57:25,466 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:57:25" (3/3) ... [2023-11-22 21:57:25,467 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_nondet_vars.c [2023-11-22 21:57:25,480 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 21:57:25,480 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 21:57:25,509 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 21:57:25,514 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;@7293c28c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 21:57:25,514 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 21:57:25,517 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:57:25,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-22 21:57:25,522 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:57:25,522 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:57:25,523 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:57:25,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:57:25,526 INFO L85 PathProgramCache]: Analyzing trace with hash 485743062, now seen corresponding path program 1 times [2023-11-22 21:57:25,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:57:25,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926136662] [2023-11-22 21:57:25,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:57:25,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:57:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:25,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:57:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:25,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:57:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 21:57:25,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:57:25,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926136662] [2023-11-22 21:57:25,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926136662] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:57:25,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:57:25,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 21:57:25,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184107983] [2023-11-22 21:57:25,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:57:25,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-22 21:57:25,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:57:25,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-22 21:57:25,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 21:57:25,666 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-22 21:57:25,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:57:25,697 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2023-11-22 21:57:25,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-22 21:57:25,700 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-22 21:57:25,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:57:25,704 INFO L225 Difference]: With dead ends: 38 [2023-11-22 21:57:25,704 INFO L226 Difference]: Without dead ends: 18 [2023-11-22 21:57:25,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 21:57:25,711 INFO L413 NwaCegarLoop]: 19 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, 19 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 [2023-11-22 21:57:25,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:57:25,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-22 21:57:25,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-22 21:57:25,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:57:25,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-11-22 21:57:25,741 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 18 [2023-11-22 21:57:25,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:57:25,741 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-11-22 21:57:25,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-22 21:57:25,742 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-11-22 21:57:25,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-22 21:57:25,743 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:57:25,743 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:57:25,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 21:57:25,745 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:57:25,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:57:25,746 INFO L85 PathProgramCache]: Analyzing trace with hash -121450414, now seen corresponding path program 1 times [2023-11-22 21:57:25,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:57:25,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769770058] [2023-11-22 21:57:25,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:57:25,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:57:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:25,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:57:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:25,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:57:25,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 21:57:25,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:57:25,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769770058] [2023-11-22 21:57:25,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769770058] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:57:25,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:57:25,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-22 21:57:25,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420294945] [2023-11-22 21:57:25,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:57:25,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 21:57:25,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:57:25,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 21:57:25,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 21:57:25,930 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 21:57:25,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:57:25,953 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-11-22 21:57:25,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 21:57:25,954 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-11-22 21:57:25,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:57:25,954 INFO L225 Difference]: With dead ends: 33 [2023-11-22 21:57:25,954 INFO L226 Difference]: Without dead ends: 26 [2023-11-22 21:57:25,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 21:57:25,956 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:57:25,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 42 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:57:25,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-22 21:57:25,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2023-11-22 21:57:25,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:57:25,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-11-22 21:57:25,961 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 18 [2023-11-22 21:57:25,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:57:25,961 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-11-22 21:57:25,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 21:57:25,961 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-11-22 21:57:25,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-22 21:57:25,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:57:25,962 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:57:25,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 21:57:25,965 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:57:25,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:57:25,966 INFO L85 PathProgramCache]: Analyzing trace with hash -787434959, now seen corresponding path program 1 times [2023-11-22 21:57:25,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:57:25,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700632194] [2023-11-22 21:57:25,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:57:25,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:57:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:26,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:57:26,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:26,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:57:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:26,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:57:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:26,376 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:57:26,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:57:26,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700632194] [2023-11-22 21:57:26,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700632194] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:57:26,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734622978] [2023-11-22 21:57:26,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:57:26,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:57:26,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:57:26,387 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:57:26,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 21:57:26,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:26,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-22 21:57:26,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:57:26,708 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 [2023-11-22 21:57:26,765 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 22 treesize of output 10 [2023-11-22 21:57:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:57:26,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:57:26,817 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 19 treesize of output 17 [2023-11-22 21:57:26,819 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 23 treesize of output 19 [2023-11-22 21:57:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:57:26,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734622978] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:57:26,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:57:26,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2023-11-22 21:57:26,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674302223] [2023-11-22 21:57:26,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:57:26,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 21:57:26,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:57:26,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 21:57:26,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-11-22 21:57:26,901 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-22 21:57:27,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:57:27,064 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2023-11-22 21:57:27,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-22 21:57:27,064 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 25 [2023-11-22 21:57:27,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:57:27,065 INFO L225 Difference]: With dead ends: 40 [2023-11-22 21:57:27,065 INFO L226 Difference]: Without dead ends: 38 [2023-11-22 21:57:27,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2023-11-22 21:57:27,067 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 49 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:57:27,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 135 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 21:57:27,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-22 21:57:27,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2023-11-22 21:57:27,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-22 21:57:27,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-11-22 21:57:27,072 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 25 [2023-11-22 21:57:27,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:57:27,072 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-11-22 21:57:27,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-22 21:57:27,073 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-11-22 21:57:27,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-22 21:57:27,073 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:57:27,074 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:57:27,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-22 21:57:27,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:57:27,285 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:57:27,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:57:27,286 INFO L85 PathProgramCache]: Analyzing trace with hash 642107988, now seen corresponding path program 1 times [2023-11-22 21:57:27,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:57:27,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540398298] [2023-11-22 21:57:27,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:57:27,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:57:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:27,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:57:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:27,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:57:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:27,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:57:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:27,356 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 21:57:27,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:57:27,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540398298] [2023-11-22 21:57:27,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540398298] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:57:27,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680216624] [2023-11-22 21:57:27,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:57:27,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:57:27,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:57:27,360 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:57:27,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 21:57:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:27,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-22 21:57:27,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:57:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 21:57:27,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:57:27,481 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 21:57:27,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680216624] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:57:27,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:57:27,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-22 21:57:27,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001892317] [2023-11-22 21:57:27,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:57:27,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-22 21:57:27,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:57:27,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-22 21:57:27,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-22 21:57:27,486 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-22 21:57:27,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:57:27,531 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2023-11-22 21:57:27,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 21:57:27,531 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2023-11-22 21:57:27,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:57:27,534 INFO L225 Difference]: With dead ends: 44 [2023-11-22 21:57:27,534 INFO L226 Difference]: Without dead ends: 34 [2023-11-22 21:57:27,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-22 21:57:27,537 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:57:27,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 57 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:57:27,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-22 21:57:27,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 22. [2023-11-22 21:57:27,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-22 21:57:27,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-22 21:57:27,552 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2023-11-22 21:57:27,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:57:27,553 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-22 21:57:27,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-22 21:57:27,553 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-22 21:57:27,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-22 21:57:27,554 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:57:27,554 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:57:27,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 21:57:27,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-22 21:57:27,768 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:57:27,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:57:27,770 INFO L85 PathProgramCache]: Analyzing trace with hash -575027342, now seen corresponding path program 2 times [2023-11-22 21:57:27,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:57:27,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195349620] [2023-11-22 21:57:27,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:57:27,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:57:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:27,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:57:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:27,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:57:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:28,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:57:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:28,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:57:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:28,021 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 21:57:28,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:57:28,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195349620] [2023-11-22 21:57:28,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195349620] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:57:28,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287726508] [2023-11-22 21:57:28,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:57:28,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:57:28,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:57:28,049 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:57:28,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 21:57:28,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:57:28,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:57:28,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-22 21:57:28,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:57:28,216 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 [2023-11-22 21:57:28,327 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 30 treesize of output 14 [2023-11-22 21:57:28,401 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 22 treesize of output 10 [2023-11-22 21:57:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:57:28,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:57:38,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287726508] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:57:38,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 21:57:38,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2023-11-22 21:57:38,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288070117] [2023-11-22 21:57:38,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 21:57:38,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 21:57:38,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:57:38,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 21:57:38,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=419, Unknown=4, NotChecked=0, Total=506 [2023-11-22 21:57:38,115 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 21 states, 20 states have (on average 1.55) internal successors, (31), 17 states have internal predecessors, (31), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-22 21:57:40,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 21:57:44,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 21:57:44,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:57:44,527 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2023-11-22 21:57:44,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-22 21:57:44,531 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.55) internal successors, (31), 17 states have internal predecessors, (31), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 32 [2023-11-22 21:57:44,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:57:44,532 INFO L225 Difference]: With dead ends: 59 [2023-11-22 21:57:44,532 INFO L226 Difference]: Without dead ends: 57 [2023-11-22 21:57:44,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=285, Invalid=1270, Unknown=5, NotChecked=0, Total=1560 [2023-11-22 21:57:44,533 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 118 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 33 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:57:44,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 142 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 200 Invalid, 2 Unknown, 0 Unchecked, 4.1s Time] [2023-11-22 21:57:44,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-22 21:57:44,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 35. [2023-11-22 21:57:44,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-22 21:57:44,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2023-11-22 21:57:44,538 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 32 [2023-11-22 21:57:44,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:57:44,538 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2023-11-22 21:57:44,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.55) internal successors, (31), 17 states have internal predecessors, (31), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-22 21:57:44,538 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2023-11-22 21:57:44,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-22 21:57:44,541 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:57:44,541 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:57:44,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 21:57:44,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:57:44,756 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:57:44,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:57:44,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1990599027, now seen corresponding path program 2 times [2023-11-22 21:57:44,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:57:44,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562210892] [2023-11-22 21:57:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:57:44,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:57:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:44,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:57:44,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:44,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:57:44,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:44,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:57:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:44,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:57:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:44,959 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 21:57:44,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:57:44,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562210892] [2023-11-22 21:57:44,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562210892] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:57:44,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050100353] [2023-11-22 21:57:44,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:57:44,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:57:44,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:57:44,981 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:57:44,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 21:57:45,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:57:45,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:57:45,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-22 21:57:45,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:57:45,194 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 [2023-11-22 21:57:45,350 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 28 treesize of output 10 [2023-11-22 21:57:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 21:57:45,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:57:45,496 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 19 treesize of output 17 [2023-11-22 21:57:45,499 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 23 treesize of output 19 [2023-11-22 21:57:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 21:57:45,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050100353] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:57:45,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:57:45,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2023-11-22 21:57:45,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601122181] [2023-11-22 21:57:45,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:57:45,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-22 21:57:45,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:57:45,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-22 21:57:45,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2023-11-22 21:57:45,658 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 24 states have internal predecessors, (46), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-22 21:57:46,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:57:46,177 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2023-11-22 21:57:46,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-22 21:57:46,178 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 24 states have internal predecessors, (46), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 35 [2023-11-22 21:57:46,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:57:46,179 INFO L225 Difference]: With dead ends: 61 [2023-11-22 21:57:46,179 INFO L226 Difference]: Without dead ends: 59 [2023-11-22 21:57:46,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=377, Invalid=1693, Unknown=0, NotChecked=0, Total=2070 [2023-11-22 21:57:46,181 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 120 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 21:57:46,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 174 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 21:57:46,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-22 21:57:46,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2023-11-22 21:57:46,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-22 21:57:46,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2023-11-22 21:57:46,187 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 35 [2023-11-22 21:57:46,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:57:46,187 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2023-11-22 21:57:46,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 24 states have internal predecessors, (46), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-22 21:57:46,188 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2023-11-22 21:57:46,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-22 21:57:46,203 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:57:46,204 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:57:46,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 21:57:46,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:57:46,404 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:57:46,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:57:46,405 INFO L85 PathProgramCache]: Analyzing trace with hash 348805492, now seen corresponding path program 3 times [2023-11-22 21:57:46,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:57:46,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165616705] [2023-11-22 21:57:46,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:57:46,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:57:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:46,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:57:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:46,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:57:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:46,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:57:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:46,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:57:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:46,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:57:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:57:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-22 21:57:46,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:57:46,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165616705] [2023-11-22 21:57:46,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165616705] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:57:46,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866216624] [2023-11-22 21:57:46,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 21:57:46,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:57:46,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:57:46,793 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:57:46,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 21:57:46,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-22 21:57:46,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:57:46,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-22 21:57:46,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:57:46,985 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 [2023-11-22 21:57:47,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2023-11-22 21:57:47,207 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 28 treesize of output 10 [2023-11-22 21:57:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-22 21:57:47,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:57:49,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866216624] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:57:49,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 21:57:49,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 26 [2023-11-22 21:57:49,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996606339] [2023-11-22 21:57:49,374 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 21:57:49,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-22 21:57:49,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:57:49,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-22 21:57:49,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=691, Unknown=1, NotChecked=0, Total=812 [2023-11-22 21:57:49,376 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 22 states have internal predecessors, (41), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2023-11-22 21:57:51,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 21:57:53,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 21:57:55,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 21:57:59,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 21:57:59,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:57:59,959 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2023-11-22 21:57:59,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-22 21:57:59,961 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 22 states have internal predecessors, (41), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) Word has length 42 [2023-11-22 21:57:59,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:57:59,962 INFO L225 Difference]: With dead ends: 88 [2023-11-22 21:57:59,962 INFO L226 Difference]: Without dead ends: 86 [2023-11-22 21:57:59,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=431, Invalid=2017, Unknown=2, NotChecked=0, Total=2450 [2023-11-22 21:57:59,963 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 198 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 44 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-11-22 21:57:59,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 186 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 334 Invalid, 4 Unknown, 0 Unchecked, 8.2s Time] [2023-11-22 21:57:59,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-22 21:57:59,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2023-11-22 21:57:59,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 44 states have internal predecessors, (48), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-22 21:57:59,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2023-11-22 21:57:59,971 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 42 [2023-11-22 21:57:59,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:57:59,971 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2023-11-22 21:57:59,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 22 states have internal predecessors, (41), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2023-11-22 21:57:59,971 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2023-11-22 21:57:59,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-22 21:57:59,972 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:57:59,972 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:57:59,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-22 21:58:00,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:58:00,173 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:58:00,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:58:00,173 INFO L85 PathProgramCache]: Analyzing trace with hash 594372658, now seen corresponding path program 4 times [2023-11-22 21:58:00,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:58:00,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170684225] [2023-11-22 21:58:00,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:58:00,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:58:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:00,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:58:00,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:00,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:58:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:00,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:58:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:00,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:58:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 21:58:00,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:58:00,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170684225] [2023-11-22 21:58:00,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170684225] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:58:00,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060161827] [2023-11-22 21:58:00,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 21:58:00,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:58:00,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:58:00,284 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:58:00,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-22 21:58:00,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 21:58:00,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:58:00,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-22 21:58:00,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:58:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-22 21:58:00,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:58:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-22 21:58:00,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060161827] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:58:00,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:58:00,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 16 [2023-11-22 21:58:00,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310885989] [2023-11-22 21:58:00,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:58:00,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-22 21:58:00,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:58:00,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-22 21:58:00,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-11-22 21:58:00,476 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-22 21:58:00,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:58:00,574 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2023-11-22 21:58:00,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-22 21:58:00,574 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2023-11-22 21:58:00,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:58:00,575 INFO L225 Difference]: With dead ends: 72 [2023-11-22 21:58:00,575 INFO L226 Difference]: Without dead ends: 55 [2023-11-22 21:58:00,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2023-11-22 21:58:00,575 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:58:00,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 116 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 21:58:00,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-22 21:58:00,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2023-11-22 21:58:00,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-22 21:58:00,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2023-11-22 21:58:00,584 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 44 [2023-11-22 21:58:00,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:58:00,585 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2023-11-22 21:58:00,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-22 21:58:00,586 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2023-11-22 21:58:00,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-22 21:58:00,587 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:58:00,587 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:58:00,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-22 21:58:00,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:58:00,800 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:58:00,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:58:00,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1744123953, now seen corresponding path program 5 times [2023-11-22 21:58:00,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:58:00,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506125302] [2023-11-22 21:58:00,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:58:00,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:58:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:01,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:58:01,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:01,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:58:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:01,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:58:01,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:01,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:58:01,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:01,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:58:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-22 21:58:01,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:58:01,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506125302] [2023-11-22 21:58:01,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506125302] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:58:01,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763763771] [2023-11-22 21:58:01,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 21:58:01,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:58:01,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:58:01,253 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:58:01,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-22 21:58:01,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-22 21:58:01,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:58:01,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-22 21:58:01,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:58:01,520 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 [2023-11-22 21:58:01,697 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 22 treesize of output 10 [2023-11-22 21:58:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-22 21:58:01,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:58:01,818 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 19 treesize of output 17 [2023-11-22 21:58:01,827 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 23 treesize of output 19 [2023-11-22 21:58:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-22 21:58:02,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763763771] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:58:02,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:58:02,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 38 [2023-11-22 21:58:02,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494468930] [2023-11-22 21:58:02,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:58:02,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-22 21:58:02,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:58:02,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-22 21:58:02,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2023-11-22 21:58:02,012 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 38 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 32 states have internal predecessors, (62), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2023-11-22 21:58:02,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:58:02,623 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2023-11-22 21:58:02,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-22 21:58:02,624 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 32 states have internal predecessors, (62), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) Word has length 45 [2023-11-22 21:58:02,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:58:02,624 INFO L225 Difference]: With dead ends: 72 [2023-11-22 21:58:02,624 INFO L226 Difference]: Without dead ends: 70 [2023-11-22 21:58:02,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=417, Invalid=2553, Unknown=0, NotChecked=0, Total=2970 [2023-11-22 21:58:02,625 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 137 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 21:58:02,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 188 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 21:58:02,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-22 21:58:02,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 53. [2023-11-22 21:58:02,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.1) internal successors, (44), 41 states have internal predecessors, (44), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-22 21:58:02,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2023-11-22 21:58:02,631 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 45 [2023-11-22 21:58:02,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:58:02,632 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2023-11-22 21:58:02,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 32 states have internal predecessors, (62), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2023-11-22 21:58:02,635 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2023-11-22 21:58:02,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-22 21:58:02,639 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:58:02,639 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:58:02,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-22 21:58:02,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:58:02,840 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:58:02,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:58:02,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1312062380, now seen corresponding path program 6 times [2023-11-22 21:58:02,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:58:02,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714248280] [2023-11-22 21:58:02,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:58:02,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:58:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:02,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:58:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:02,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:58:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:02,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:58:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:02,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:58:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:02,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:58:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:02,954 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-22 21:58:02,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:58:02,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714248280] [2023-11-22 21:58:02,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714248280] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:58:02,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140828779] [2023-11-22 21:58:02,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 21:58:02,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:58:02,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:58:02,956 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:58:02,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-22 21:58:03,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-22 21:58:03,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:58:03,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-22 21:58:03,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:58:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-22 21:58:03,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:58:03,176 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-22 21:58:03,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140828779] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:58:03,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:58:03,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-22 21:58:03,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981101987] [2023-11-22 21:58:03,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:58:03,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-22 21:58:03,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:58:03,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-22 21:58:03,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-22 21:58:03,177 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-22 21:58:03,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:58:03,260 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2023-11-22 21:58:03,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-22 21:58:03,261 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2023-11-22 21:58:03,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:58:03,261 INFO L225 Difference]: With dead ends: 76 [2023-11-22 21:58:03,261 INFO L226 Difference]: Without dead ends: 60 [2023-11-22 21:58:03,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 93 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-11-22 21:58:03,262 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 26 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:58:03,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 97 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 21:58:03,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-22 21:58:03,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2023-11-22 21:58:03,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-22 21:58:03,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2023-11-22 21:58:03,268 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 48 [2023-11-22 21:58:03,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:58:03,268 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2023-11-22 21:58:03,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-22 21:58:03,268 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2023-11-22 21:58:03,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-22 21:58:03,269 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:58:03,269 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:58:03,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-22 21:58:03,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-22 21:58:03,482 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:58:03,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:58:03,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1159209714, now seen corresponding path program 7 times [2023-11-22 21:58:03,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:58:03,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650033121] [2023-11-22 21:58:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:58:03,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:58:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:03,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:58:03,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:03,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:58:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:03,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:58:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:03,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:58:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:03,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:58:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:03,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:58:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 41 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-22 21:58:03,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:58:03,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650033121] [2023-11-22 21:58:03,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650033121] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:58:03,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763163108] [2023-11-22 21:58:03,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 21:58:03,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:58:03,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:58:03,848 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:58:03,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-22 21:58:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:03,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-22 21:58:03,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:58:04,062 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 [2023-11-22 21:58:04,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 21:58:04,210 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 34 treesize of output 14 [2023-11-22 21:58:04,369 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 22 treesize of output 10 [2023-11-22 21:58:04,383 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-22 21:58:04,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:58:06,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763163108] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:58:06,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 21:58:06,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2023-11-22 21:58:06,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139202623] [2023-11-22 21:58:06,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 21:58:06,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-22 21:58:06,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:58:06,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-22 21:58:06,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=960, Unknown=1, NotChecked=0, Total=1122 [2023-11-22 21:58:06,572 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 29 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-22 21:58:08,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 21:58:10,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 21:58:11,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:58:11,031 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2023-11-22 21:58:11,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-22 21:58:11,031 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 52 [2023-11-22 21:58:11,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:58:11,032 INFO L225 Difference]: With dead ends: 68 [2023-11-22 21:58:11,032 INFO L226 Difference]: Without dead ends: 66 [2023-11-22 21:58:11,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=345, Invalid=1816, Unknown=1, NotChecked=0, Total=2162 [2023-11-22 21:58:11,033 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 11 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-22 21:58:11,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 254 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 451 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2023-11-22 21:58:11,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-22 21:58:11,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2023-11-22 21:58:11,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-22 21:58:11,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2023-11-22 21:58:11,049 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 52 [2023-11-22 21:58:11,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:58:11,050 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2023-11-22 21:58:11,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-22 21:58:11,050 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2023-11-22 21:58:11,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-22 21:58:11,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:58:11,051 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:58:11,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-22 21:58:11,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:58:11,260 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:58:11,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:58:11,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1809836557, now seen corresponding path program 8 times [2023-11-22 21:58:11,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:58:11,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778641391] [2023-11-22 21:58:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:58:11,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:58:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:11,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:58:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:11,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:58:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:11,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:58:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:11,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:58:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:11,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:58:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:11,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:58:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-22 21:58:11,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:58:11,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778641391] [2023-11-22 21:58:11,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778641391] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:58:11,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983168512] [2023-11-22 21:58:11,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:58:11,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:58:11,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:58:11,594 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) [2023-11-22 21:58:11,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-22 21:58:11,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:58:11,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:58:11,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-22 21:58:11,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:58:11,826 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 [2023-11-22 21:58:12,032 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 28 treesize of output 10 [2023-11-22 21:58:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-22 21:58:12,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:58:12,278 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 19 treesize of output 17 [2023-11-22 21:58:12,281 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 23 treesize of output 19 [2023-11-22 21:58:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-22 21:58:12,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983168512] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:58:12,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:58:12,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 41 [2023-11-22 21:58:12,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508191048] [2023-11-22 21:58:12,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:58:12,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-22 21:58:12,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:58:12,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-22 21:58:12,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2023-11-22 21:58:12,592 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 36 states have internal predecessors, (76), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2023-11-22 21:58:13,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:58:13,600 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2023-11-22 21:58:13,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-22 21:58:13,601 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 36 states have internal predecessors, (76), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) Word has length 55 [2023-11-22 21:58:13,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:58:13,602 INFO L225 Difference]: With dead ends: 91 [2023-11-22 21:58:13,602 INFO L226 Difference]: Without dead ends: 89 [2023-11-22 21:58:13,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=700, Invalid=3856, Unknown=0, NotChecked=0, Total=4556 [2023-11-22 21:58:13,603 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 158 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 21:58:13,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 233 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 21:58:13,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-22 21:58:13,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 67. [2023-11-22 21:58:13,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-22 21:58:13,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2023-11-22 21:58:13,612 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 55 [2023-11-22 21:58:13,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:58:13,612 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2023-11-22 21:58:13,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 36 states have internal predecessors, (76), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2023-11-22 21:58:13,612 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2023-11-22 21:58:13,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-22 21:58:13,613 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:58:13,613 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:58:13,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-22 21:58:13,824 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,SelfDestructingSolverStorable11 [2023-11-22 21:58:13,824 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:58:13,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:58:13,824 INFO L85 PathProgramCache]: Analyzing trace with hash 982598516, now seen corresponding path program 9 times [2023-11-22 21:58:13,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:58:13,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651396562] [2023-11-22 21:58:13,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:58:13,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:58:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:14,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:58:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:14,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:58:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:14,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:58:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:14,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:58:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:14,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:58:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:14,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:58:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:14,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:58:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-22 21:58:14,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:58:14,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651396562] [2023-11-22 21:58:14,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651396562] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:58:14,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364440039] [2023-11-22 21:58:14,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 21:58:14,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:58:14,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:58:14,193 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) [2023-11-22 21:58:14,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-22 21:58:14,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-22 21:58:14,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:58:14,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-22 21:58:14,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:58:14,454 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 [2023-11-22 21:58:14,606 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-22 21:58:14,606 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 42 treesize of output 16 [2023-11-22 21:58:14,778 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 28 treesize of output 10 [2023-11-22 21:58:14,799 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 33 proven. 65 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-22 21:58:14,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:58:16,885 WARN L854 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (< 5 (select (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) (+ |c_ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~i~0#1|)) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 16)))) is different from false [2023-11-22 21:58:16,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364440039] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:58:16,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 21:58:16,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2023-11-22 21:58:16,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153049515] [2023-11-22 21:58:16,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 21:58:16,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-22 21:58:16,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:58:16,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-22 21:58:16,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=931, Unknown=1, NotChecked=62, Total=1122 [2023-11-22 21:58:16,893 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 28 states have internal predecessors, (60), 11 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2023-11-22 21:58:19,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 21:58:21,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 21:58:23,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 21:58:23,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:58:23,491 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2023-11-22 21:58:23,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-22 21:58:23,491 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 28 states have internal predecessors, (60), 11 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) Word has length 62 [2023-11-22 21:58:23,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:58:23,492 INFO L225 Difference]: With dead ends: 90 [2023-11-22 21:58:23,492 INFO L226 Difference]: Without dead ends: 88 [2023-11-22 21:58:23,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=316, Invalid=1943, Unknown=1, NotChecked=92, Total=2352 [2023-11-22 21:58:23,493 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 109 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 16 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-11-22 21:58:23,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 229 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 553 Invalid, 3 Unknown, 0 Unchecked, 6.3s Time] [2023-11-22 21:58:23,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-22 21:58:23,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2023-11-22 21:58:23,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-22 21:58:23,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2023-11-22 21:58:23,502 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 62 [2023-11-22 21:58:23,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:58:23,502 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2023-11-22 21:58:23,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 28 states have internal predecessors, (60), 11 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2023-11-22 21:58:23,502 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2023-11-22 21:58:23,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-22 21:58:23,503 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:58:23,503 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:58:23,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-22 21:58:23,715 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,SelfDestructingSolverStorable12 [2023-11-22 21:58:23,715 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:58:23,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:58:23,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1899098575, now seen corresponding path program 10 times [2023-11-22 21:58:23,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:58:23,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122726884] [2023-11-22 21:58:23,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:58:23,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:58:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:24,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:58:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:24,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:58:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:24,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:58:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:24,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:58:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:24,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:58:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:24,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:58:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:24,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:58:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 18 proven. 73 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-22 21:58:24,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:58:24,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122726884] [2023-11-22 21:58:24,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122726884] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:58:24,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841390409] [2023-11-22 21:58:24,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 21:58:24,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:58:24,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:58:24,135 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) [2023-11-22 21:58:24,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-22 21:58:24,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 21:58:24,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:58:24,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-22 21:58:24,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:58:24,464 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 [2023-11-22 21:58:24,693 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 22 treesize of output 10 [2023-11-22 21:58:24,730 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 24 proven. 73 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-22 21:58:24,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:58:24,822 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 19 treesize of output 17 [2023-11-22 21:58:24,824 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 23 treesize of output 19 [2023-11-22 21:58:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 18 proven. 73 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-22 21:58:24,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841390409] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:58:24,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:58:24,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 18] total 35 [2023-11-22 21:58:24,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797551630] [2023-11-22 21:58:24,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:58:24,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-22 21:58:24,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:58:24,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-22 21:58:24,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2023-11-22 21:58:24,945 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 31 states have internal predecessors, (70), 12 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2023-11-22 21:58:25,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:58:25,718 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2023-11-22 21:58:25,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-22 21:58:25,719 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 31 states have internal predecessors, (70), 12 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) Word has length 65 [2023-11-22 21:58:25,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:58:25,719 INFO L225 Difference]: With dead ends: 116 [2023-11-22 21:58:25,720 INFO L226 Difference]: Without dead ends: 114 [2023-11-22 21:58:25,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 121 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=349, Invalid=2513, Unknown=0, NotChecked=0, Total=2862 [2023-11-22 21:58:25,721 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 126 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 21:58:25,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 405 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 21:58:25,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-22 21:58:25,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 75. [2023-11-22 21:58:25,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 states have internal predecessors, (65), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-22 21:58:25,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2023-11-22 21:58:25,737 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 65 [2023-11-22 21:58:25,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:58:25,738 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2023-11-22 21:58:25,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 31 states have internal predecessors, (70), 12 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2023-11-22 21:58:25,738 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2023-11-22 21:58:25,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-22 21:58:25,738 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:58:25,738 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:58:25,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-22 21:58:25,950 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,SelfDestructingSolverStorable13 [2023-11-22 21:58:25,950 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:58:25,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:58:25,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1564143188, now seen corresponding path program 11 times [2023-11-22 21:58:25,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:58:25,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424780676] [2023-11-22 21:58:25,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:58:25,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:58:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:26,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:58:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:26,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:58:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:26,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:58:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:26,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:58:26,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:26,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:58:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:26,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:58:26,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:26,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:58:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 27 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-22 21:58:26,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:58:26,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424780676] [2023-11-22 21:58:26,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424780676] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:58:26,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899412619] [2023-11-22 21:58:26,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 21:58:26,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:58:26,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:58:26,137 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) [2023-11-22 21:58:26,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-22 21:58:26,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-22 21:58:26,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:58:26,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-22 21:58:26,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:58:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 40 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-22 21:58:26,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:58:26,458 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 40 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-22 21:58:26,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899412619] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:58:26,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:58:26,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-11-22 21:58:26,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928704862] [2023-11-22 21:58:26,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:58:26,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-22 21:58:26,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:58:26,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-22 21:58:26,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-11-22 21:58:26,459 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-22 21:58:26,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:58:26,633 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2023-11-22 21:58:26,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-22 21:58:26,633 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2023-11-22 21:58:26,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:58:26,634 INFO L225 Difference]: With dead ends: 120 [2023-11-22 21:58:26,634 INFO L226 Difference]: Without dead ends: 74 [2023-11-22 21:58:26,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 131 SyntacticMatches, 11 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2023-11-22 21:58:26,635 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 49 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:58:26,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 131 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 21:58:26,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-22 21:58:26,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2023-11-22 21:58:26,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-22 21:58:26,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2023-11-22 21:58:26,643 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 68 [2023-11-22 21:58:26,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:58:26,643 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2023-11-22 21:58:26,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-22 21:58:26,643 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2023-11-22 21:58:26,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-22 21:58:26,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:58:26,644 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:58:26,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-22 21:58:26,855 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,SelfDestructingSolverStorable14 [2023-11-22 21:58:26,855 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:58:26,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:58:26,856 INFO L85 PathProgramCache]: Analyzing trace with hash -693563790, now seen corresponding path program 12 times [2023-11-22 21:58:26,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:58:26,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073314420] [2023-11-22 21:58:26,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:58:26,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:58:26,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:27,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:58:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:27,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:58:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:27,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:58:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:27,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:58:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:27,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:58:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:27,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:58:27,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:27,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:58:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:27,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 21:58:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 18 proven. 95 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-22 21:58:27,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:58:27,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073314420] [2023-11-22 21:58:27,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073314420] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:58:27,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260506215] [2023-11-22 21:58:27,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 21:58:27,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:58:27,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:58:27,372 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) [2023-11-22 21:58:27,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-22 21:58:27,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-22 21:58:27,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:58:27,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-22 21:58:27,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:58:27,744 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 [2023-11-22 21:58:27,894 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-22 21:58:27,894 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 42 treesize of output 16 [2023-11-22 21:58:28,115 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 28 treesize of output 10 [2023-11-22 21:58:28,139 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 31 proven. 110 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-22 21:58:28,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:58:36,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260506215] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:58:36,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 21:58:36,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 37 [2023-11-22 21:58:36,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806426353] [2023-11-22 21:58:36,360 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 21:58:36,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-22 21:58:36,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:58:36,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-22 21:58:36,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1319, Unknown=4, NotChecked=0, Total=1482 [2023-11-22 21:58:36,361 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 33 states have internal predecessors, (70), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (16), 15 states have call predecessors, (16), 13 states have call successors, (16) [2023-11-22 21:58:38,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 21:58:40,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 21:58:41,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:58:41,045 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2023-11-22 21:58:41,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-22 21:58:41,045 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 33 states have internal predecessors, (70), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (16), 15 states have call predecessors, (16), 13 states have call successors, (16) Word has length 72 [2023-11-22 21:58:41,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:58:41,046 INFO L225 Difference]: With dead ends: 76 [2023-11-22 21:58:41,046 INFO L226 Difference]: Without dead ends: 74 [2023-11-22 21:58:41,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=393, Invalid=2683, Unknown=4, NotChecked=0, Total=3080 [2023-11-22 21:58:41,049 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 60 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-22 21:58:41,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 398 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 769 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2023-11-22 21:58:41,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-22 21:58:41,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2023-11-22 21:58:41,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-22 21:58:41,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2023-11-22 21:58:41,060 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 72 [2023-11-22 21:58:41,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:58:41,060 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2023-11-22 21:58:41,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 33 states have internal predecessors, (70), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (16), 15 states have call predecessors, (16), 13 states have call successors, (16) [2023-11-22 21:58:41,060 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2023-11-22 21:58:41,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-22 21:58:41,061 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:58:41,061 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:58:41,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-22 21:58:41,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:58:41,275 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:58:41,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:58:41,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1134393971, now seen corresponding path program 13 times [2023-11-22 21:58:41,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:58:41,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831931211] [2023-11-22 21:58:41,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:58:41,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:58:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:41,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:58:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:41,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:58:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:41,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:58:41,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:41,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:58:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:41,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:58:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:41,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:58:41,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:41,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:58:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:41,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 21:58:41,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 21 proven. 106 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-22 21:58:41,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:58:41,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831931211] [2023-11-22 21:58:41,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831931211] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:58:41,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410327976] [2023-11-22 21:58:41,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 21:58:41,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:58:41,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:58:41,716 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) [2023-11-22 21:58:41,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-22 21:58:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:41,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-22 21:58:41,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:58:42,281 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 [2023-11-22 21:58:42,625 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 22 treesize of output 10 [2023-11-22 21:58:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 21 proven. 106 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-22 21:58:42,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:58:42,766 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 19 treesize of output 17 [2023-11-22 21:58:42,767 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 23 treesize of output 19 [2023-11-22 21:58:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 21 proven. 106 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-22 21:58:42,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410327976] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:58:42,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:58:42,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 20] total 39 [2023-11-22 21:58:42,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735144847] [2023-11-22 21:58:42,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:58:42,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-22 21:58:42,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:58:42,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-22 21:58:42,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1337, Unknown=0, NotChecked=0, Total=1482 [2023-11-22 21:58:42,893 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 39 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 35 states have internal predecessors, (80), 14 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (15), 15 states have call predecessors, (15), 14 states have call successors, (15) [2023-11-22 21:58:43,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:58:43,833 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2023-11-22 21:58:43,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-22 21:58:43,833 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 35 states have internal predecessors, (80), 14 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (15), 15 states have call predecessors, (15), 14 states have call successors, (15) Word has length 75 [2023-11-22 21:58:43,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:58:43,834 INFO L225 Difference]: With dead ends: 105 [2023-11-22 21:58:43,834 INFO L226 Difference]: Without dead ends: 103 [2023-11-22 21:58:43,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 140 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=404, Invalid=3256, Unknown=0, NotChecked=0, Total=3660 [2023-11-22 21:58:43,835 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 139 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-22 21:58:43,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 468 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-22 21:58:43,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-22 21:58:43,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 75. [2023-11-22 21:58:43,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-22 21:58:43,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2023-11-22 21:58:43,869 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 75 [2023-11-22 21:58:43,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:58:43,869 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2023-11-22 21:58:43,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 35 states have internal predecessors, (80), 14 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (15), 15 states have call predecessors, (15), 14 states have call successors, (15) [2023-11-22 21:58:43,869 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2023-11-22 21:58:43,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-22 21:58:43,870 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:58:43,870 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:58:43,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-22 21:58:44,081 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,SelfDestructingSolverStorable16 [2023-11-22 21:58:44,081 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:58:44,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:58:44,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1933705938, now seen corresponding path program 14 times [2023-11-22 21:58:44,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:58:44,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701266289] [2023-11-22 21:58:44,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:58:44,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:58:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:44,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:58:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:44,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:58:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:44,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:58:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:44,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:58:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:44,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:58:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:44,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:58:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:44,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:58:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:44,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 21:58:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 41 proven. 67 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-22 21:58:44,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:58:44,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701266289] [2023-11-22 21:58:44,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701266289] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:58:44,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699731378] [2023-11-22 21:58:44,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:58:44,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:58:44,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:58:44,339 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) [2023-11-22 21:58:44,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-22 21:58:44,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:58:44,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:58:44,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-22 21:58:44,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:58:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 57 proven. 51 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-22 21:58:44,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:58:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 57 proven. 51 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-22 21:58:44,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699731378] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:58:44,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:58:44,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-22 21:58:44,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444802348] [2023-11-22 21:58:44,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:58:44,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-22 21:58:44,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:58:44,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-22 21:58:44,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-11-22 21:58:44,791 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-22 21:58:44,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:58:44,954 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2023-11-22 21:58:44,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-22 21:58:44,955 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 78 [2023-11-22 21:58:44,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:58:44,955 INFO L225 Difference]: With dead ends: 109 [2023-11-22 21:58:44,955 INFO L226 Difference]: Without dead ends: 84 [2023-11-22 21:58:44,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 150 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-11-22 21:58:44,956 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 68 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:58:44,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 137 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 21:58:44,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-22 21:58:44,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2023-11-22 21:58:44,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-22 21:58:44,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2023-11-22 21:58:44,965 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 78 [2023-11-22 21:58:44,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:58:44,965 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2023-11-22 21:58:44,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-22 21:58:44,965 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2023-11-22 21:58:44,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-22 21:58:44,966 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:58:44,966 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:58:44,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-22 21:58:45,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-22 21:58:45,176 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:58:45,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:58:45,177 INFO L85 PathProgramCache]: Analyzing trace with hash -2083922572, now seen corresponding path program 15 times [2023-11-22 21:58:45,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:58:45,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127800026] [2023-11-22 21:58:45,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:58:45,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:58:45,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:45,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:58:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:45,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:58:45,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:45,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:58:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:45,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:58:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:45,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:58:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:45,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:58:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:45,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:58:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:45,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 21:58:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:45,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 21:58:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 21 proven. 131 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-22 21:58:45,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:58:45,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127800026] [2023-11-22 21:58:45,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127800026] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:58:45,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308134144] [2023-11-22 21:58:45,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 21:58:45,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:58:45,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:58:45,692 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) [2023-11-22 21:58:45,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-22 21:58:45,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-22 21:58:45,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:58:45,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-22 21:58:45,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:58:46,236 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 [2023-11-22 21:58:46,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 21:58:46,393 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 34 treesize of output 14 [2023-11-22 21:58:46,709 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 22 treesize of output 10 [2023-11-22 21:58:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 47 proven. 131 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-22 21:58:46,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:58:52,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308134144] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:58:52,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 21:58:52,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 42 [2023-11-22 21:58:52,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996338656] [2023-11-22 21:58:52,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 21:58:52,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-22 21:58:52,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:58:52,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-22 21:58:52,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1693, Unknown=2, NotChecked=0, Total=1892 [2023-11-22 21:58:52,980 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 42 states, 40 states have (on average 2.025) internal successors, (81), 38 states have internal predecessors, (81), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2023-11-22 21:58:53,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:58:53,814 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2023-11-22 21:58:53,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-22 21:58:53,814 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.025) internal successors, (81), 38 states have internal predecessors, (81), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) Word has length 82 [2023-11-22 21:58:53,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:58:53,815 INFO L225 Difference]: With dead ends: 86 [2023-11-22 21:58:53,815 INFO L226 Difference]: Without dead ends: 84 [2023-11-22 21:58:53,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 94 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=483, Invalid=3421, Unknown=2, NotChecked=0, Total=3906 [2023-11-22 21:58:53,816 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 108 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 21:58:53,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 332 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 21:58:53,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-22 21:58:53,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2023-11-22 21:58:53,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-22 21:58:53,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2023-11-22 21:58:53,827 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 82 [2023-11-22 21:58:53,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:58:53,827 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2023-11-22 21:58:53,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.025) internal successors, (81), 38 states have internal predecessors, (81), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2023-11-22 21:58:53,828 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2023-11-22 21:58:53,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-22 21:58:53,828 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:58:53,828 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:58:53,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-22 21:58:54,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:58:54,039 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:58:54,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:58:54,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1620522033, now seen corresponding path program 16 times [2023-11-22 21:58:54,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:58:54,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816662325] [2023-11-22 21:58:54,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:58:54,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:58:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:54,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:58:54,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:54,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:58:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:54,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:58:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:54,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:58:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:54,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:58:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:54,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:58:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:54,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:58:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:54,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 21:58:54,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:54,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 21:58:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 24 proven. 145 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-22 21:58:54,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:58:54,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816662325] [2023-11-22 21:58:54,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816662325] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:58:54,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070328020] [2023-11-22 21:58:54,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 21:58:54,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:58:54,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:58:54,547 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) [2023-11-22 21:58:54,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-22 21:58:54,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 21:58:54,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:58:54,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-22 21:58:54,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:58:55,075 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 [2023-11-22 21:58:55,485 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 22 treesize of output 10 [2023-11-22 21:58:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 27 proven. 154 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-22 21:58:55,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:58:55,681 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 19 treesize of output 17 [2023-11-22 21:58:55,684 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 23 treesize of output 19 [2023-11-22 21:58:55,859 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 24 proven. 145 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-22 21:58:55,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070328020] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:58:55,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:58:55,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 22] total 45 [2023-11-22 21:58:55,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869957390] [2023-11-22 21:58:55,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:58:55,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-22 21:58:55,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:58:55,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-22 21:58:55,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1809, Unknown=0, NotChecked=0, Total=1980 [2023-11-22 21:58:55,861 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 45 states, 43 states have (on average 2.13953488372093) internal successors, (92), 40 states have internal predecessors, (92), 17 states have call successors, (18), 1 states have call predecessors, (18), 2 states have return successors, (18), 18 states have call predecessors, (18), 17 states have call successors, (18) [2023-11-22 21:58:56,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:58:56,953 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2023-11-22 21:58:56,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-22 21:58:56,954 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.13953488372093) internal successors, (92), 40 states have internal predecessors, (92), 17 states have call successors, (18), 1 states have call predecessors, (18), 2 states have return successors, (18), 18 states have call predecessors, (18), 17 states have call successors, (18) Word has length 85 [2023-11-22 21:58:56,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:58:56,955 INFO L225 Difference]: With dead ends: 118 [2023-11-22 21:58:56,955 INFO L226 Difference]: Without dead ends: 116 [2023-11-22 21:58:56,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 158 SyntacticMatches, 8 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1294 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=471, Invalid=4359, Unknown=0, NotChecked=0, Total=4830 [2023-11-22 21:58:56,956 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 143 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-22 21:58:56,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 631 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1404 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-22 21:58:56,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-22 21:58:56,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 85. [2023-11-22 21:58:56,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-22 21:58:56,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2023-11-22 21:58:56,969 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 85 [2023-11-22 21:58:56,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:58:56,970 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2023-11-22 21:58:56,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.13953488372093) internal successors, (92), 40 states have internal predecessors, (92), 17 states have call successors, (18), 1 states have call predecessors, (18), 2 states have return successors, (18), 18 states have call predecessors, (18), 17 states have call successors, (18) [2023-11-22 21:58:56,970 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2023-11-22 21:58:56,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-22 21:58:56,971 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:58:56,971 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:58:56,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-22 21:58:57,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:58:57,183 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:58:57,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:58:57,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1545078868, now seen corresponding path program 17 times [2023-11-22 21:58:57,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:58:57,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645108508] [2023-11-22 21:58:57,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:58:57,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:58:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:57,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:58:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:57,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:58:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:57,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:58:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:57,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:58:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:57,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:58:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:57,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:58:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:57,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:58:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:57,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 21:58:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:57,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 21:58:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 58 proven. 89 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-22 21:58:57,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:58:57,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645108508] [2023-11-22 21:58:57,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645108508] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:58:57,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634645058] [2023-11-22 21:58:57,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 21:58:57,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:58:57,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:58:57,415 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) [2023-11-22 21:58:57,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-22 21:58:57,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-11-22 21:58:57,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:58:57,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-22 21:58:57,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:58:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 77 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-22 21:58:57,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:58:57,918 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 77 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-22 21:58:57,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634645058] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:58:57,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:58:57,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-11-22 21:58:57,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773186704] [2023-11-22 21:58:57,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:58:57,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-22 21:58:57,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:58:57,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-22 21:58:57,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-11-22 21:58:57,919 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-11-22 21:58:58,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:58:58,095 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2023-11-22 21:58:58,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-22 21:58:58,095 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 88 [2023-11-22 21:58:58,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:58:58,096 INFO L225 Difference]: With dead ends: 122 [2023-11-22 21:58:58,096 INFO L226 Difference]: Without dead ends: 94 [2023-11-22 21:58:58,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 169 SyntacticMatches, 15 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2023-11-22 21:58:58,097 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 62 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:58:58,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 144 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 21:58:58,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-22 21:58:58,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2023-11-22 21:58:58,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-22 21:58:58,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2023-11-22 21:58:58,109 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 88 [2023-11-22 21:58:58,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:58:58,109 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2023-11-22 21:58:58,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-11-22 21:58:58,110 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2023-11-22 21:58:58,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-22 21:58:58,111 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:58:58,111 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:58:58,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-22 21:58:58,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:58:58,323 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:58:58,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:58:58,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1606978034, now seen corresponding path program 18 times [2023-11-22 21:58:58,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:58:58,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789825370] [2023-11-22 21:58:58,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:58:58,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:58:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:58,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:58:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:58,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:58:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:58,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:58:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:58,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:58:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:58,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:58:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:58,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:58:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:58,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:58:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:58,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 21:58:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:58,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 21:58:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:58,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 21:58:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:58:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 24 proven. 173 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-11-22 21:58:58,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:58:58,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789825370] [2023-11-22 21:58:58,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789825370] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:58:58,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054672310] [2023-11-22 21:58:58,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 21:58:58,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:58:58,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:58:58,861 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) [2023-11-22 21:58:58,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-22 21:58:58,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-11-22 21:58:58,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:58:58,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-22 21:58:58,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:58:59,428 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 [2023-11-22 21:58:59,561 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 30 treesize of output 14 [2023-11-22 21:58:59,829 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 22 treesize of output 10 [2023-11-22 21:58:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 45 proven. 194 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-22 21:58:59,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:59:06,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054672310] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:59:06,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 21:59:06,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2023-11-22 21:59:06,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757631451] [2023-11-22 21:59:06,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 21:59:06,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-22 21:59:06,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:59:06,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-22 21:59:06,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1947, Unknown=3, NotChecked=0, Total=2162 [2023-11-22 21:59:06,201 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 45 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 41 states have internal predecessors, (91), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (20), 19 states have call predecessors, (20), 18 states have call successors, (20) [2023-11-22 21:59:07,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:59:07,714 INFO L93 Difference]: Finished difference Result 137 states and 146 transitions. [2023-11-22 21:59:07,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-22 21:59:07,714 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 41 states have internal predecessors, (91), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (20), 19 states have call predecessors, (20), 18 states have call successors, (20) Word has length 92 [2023-11-22 21:59:07,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:59:07,716 INFO L225 Difference]: With dead ends: 137 [2023-11-22 21:59:07,716 INFO L226 Difference]: Without dead ends: 135 [2023-11-22 21:59:07,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 107 SyntacticMatches, 8 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2285 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=924, Invalid=6729, Unknown=3, NotChecked=0, Total=7656 [2023-11-22 21:59:07,719 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 182 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-22 21:59:07,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 533 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-22 21:59:07,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-22 21:59:07,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 95. [2023-11-22 21:59:07,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 74 states have internal predecessors, (77), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-22 21:59:07,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2023-11-22 21:59:07,741 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 92 [2023-11-22 21:59:07,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:59:07,741 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2023-11-22 21:59:07,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 41 states have internal predecessors, (91), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (20), 19 states have call predecessors, (20), 18 states have call successors, (20) [2023-11-22 21:59:07,741 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2023-11-22 21:59:07,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-22 21:59:07,742 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:59:07,742 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:59:07,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-22 21:59:07,954 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,SelfDestructingSolverStorable21 [2023-11-22 21:59:07,954 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:59:07,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:59:07,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1782730483, now seen corresponding path program 19 times [2023-11-22 21:59:07,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:59:07,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79932704] [2023-11-22 21:59:07,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:59:07,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:59:07,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:08,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:59:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:08,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:59:08,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:08,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:59:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:08,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:59:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:08,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:59:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:08,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:59:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:08,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:59:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:08,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 21:59:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:08,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 21:59:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:08,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 21:59:08,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 27 proven. 190 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-11-22 21:59:08,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:59:08,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79932704] [2023-11-22 21:59:08,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79932704] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:59:08,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758727378] [2023-11-22 21:59:08,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 21:59:08,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:59:08,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:59:08,509 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) [2023-11-22 21:59:08,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-22 21:59:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:08,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-22 21:59:08,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:59:09,071 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 [2023-11-22 21:59:09,478 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 22 treesize of output 10 [2023-11-22 21:59:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 27 proven. 190 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-11-22 21:59:09,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:59:09,674 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 19 treesize of output 17 [2023-11-22 21:59:09,676 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 23 treesize of output 19 [2023-11-22 21:59:09,832 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 27 proven. 190 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-11-22 21:59:09,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758727378] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:59:09,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:59:09,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 24] total 47 [2023-11-22 21:59:09,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683565800] [2023-11-22 21:59:09,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:59:09,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-22 21:59:09,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:59:09,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-22 21:59:09,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1983, Unknown=0, NotChecked=0, Total=2162 [2023-11-22 21:59:09,836 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 47 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 43 states have internal predecessors, (100), 18 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) [2023-11-22 21:59:11,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:59:11,057 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2023-11-22 21:59:11,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-22 21:59:11,057 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 43 states have internal predecessors, (100), 18 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) Word has length 95 [2023-11-22 21:59:11,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:59:11,058 INFO L225 Difference]: With dead ends: 133 [2023-11-22 21:59:11,058 INFO L226 Difference]: Without dead ends: 131 [2023-11-22 21:59:11,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 178 SyntacticMatches, 9 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=514, Invalid=5036, Unknown=0, NotChecked=0, Total=5550 [2023-11-22 21:59:11,059 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 128 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 1544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-22 21:59:11,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 693 Invalid, 1544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1502 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-22 21:59:11,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-22 21:59:11,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 99. [2023-11-22 21:59:11,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 77 states have (on average 1.051948051948052) internal successors, (81), 78 states have internal predecessors, (81), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-22 21:59:11,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 107 transitions. [2023-11-22 21:59:11,076 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 107 transitions. Word has length 95 [2023-11-22 21:59:11,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:59:11,077 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 107 transitions. [2023-11-22 21:59:11,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 43 states have internal predecessors, (100), 18 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) [2023-11-22 21:59:11,077 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 107 transitions. [2023-11-22 21:59:11,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-22 21:59:11,077 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:59:11,078 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:59:11,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-22 21:59:11,291 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,SelfDestructingSolverStorable22 [2023-11-22 21:59:11,292 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:59:11,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:59:11,292 INFO L85 PathProgramCache]: Analyzing trace with hash 2058804818, now seen corresponding path program 20 times [2023-11-22 21:59:11,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:59:11,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058478682] [2023-11-22 21:59:11,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:59:11,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:59:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:11,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:59:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:11,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:59:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:11,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:59:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:11,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:59:11,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:11,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:59:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:11,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:59:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:11,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:59:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:11,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 21:59:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:11,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 21:59:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:11,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 21:59:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:11,570 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 78 proven. 114 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-22 21:59:11,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:59:11,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058478682] [2023-11-22 21:59:11,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058478682] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:59:11,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815238864] [2023-11-22 21:59:11,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:59:11,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:59:11,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:59:11,571 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) [2023-11-22 21:59:11,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-22 21:59:11,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:59:11,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:59:11,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-22 21:59:11,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:59:11,907 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 100 proven. 92 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-22 21:59:11,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:59:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 100 proven. 92 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-22 21:59:12,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815238864] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:59:12,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:59:12,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-11-22 21:59:12,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437758484] [2023-11-22 21:59:12,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:59:12,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-22 21:59:12,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:59:12,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-22 21:59:12,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-11-22 21:59:12,117 INFO L87 Difference]: Start difference. First operand 99 states and 107 transitions. Second operand has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-22 21:59:12,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:59:12,286 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions. [2023-11-22 21:59:12,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-22 21:59:12,286 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 98 [2023-11-22 21:59:12,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:59:12,287 INFO L225 Difference]: With dead ends: 137 [2023-11-22 21:59:12,287 INFO L226 Difference]: Without dead ends: 106 [2023-11-22 21:59:12,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 188 SyntacticMatches, 17 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2023-11-22 21:59:12,288 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 70 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:59:12,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 172 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 21:59:12,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-22 21:59:12,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 95. [2023-11-22 21:59:12,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 74 states have internal predecessors, (76), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-22 21:59:12,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2023-11-22 21:59:12,303 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 98 [2023-11-22 21:59:12,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:59:12,303 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2023-11-22 21:59:12,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-22 21:59:12,304 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2023-11-22 21:59:12,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-22 21:59:12,304 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:59:12,304 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:59:12,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-22 21:59:12,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:59:12,517 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:59:12,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:59:12,517 INFO L85 PathProgramCache]: Analyzing trace with hash 267921268, now seen corresponding path program 21 times [2023-11-22 21:59:12,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:59:12,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766693109] [2023-11-22 21:59:12,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:59:12,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:59:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:13,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:59:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:13,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:59:13,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:13,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:59:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:13,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:59:13,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:13,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:59:13,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:13,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:59:13,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:13,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:59:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:13,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 21:59:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:13,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 21:59:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:13,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 21:59:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:13,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-22 21:59:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 27 proven. 221 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-11-22 21:59:13,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:59:13,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766693109] [2023-11-22 21:59:13,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766693109] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:59:13,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858503995] [2023-11-22 21:59:13,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 21:59:13,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:59:13,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:59:13,061 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) [2023-11-22 21:59:13,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-22 21:59:13,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-22 21:59:13,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:59:13,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-22 21:59:13,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:59:13,837 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 [2023-11-22 21:59:14,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2023-11-22 21:59:14,410 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 28 treesize of output 10 [2023-11-22 21:59:14,434 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 52 proven. 245 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-11-22 21:59:14,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:59:16,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858503995] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:59:16,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 21:59:16,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 50 [2023-11-22 21:59:16,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137060354] [2023-11-22 21:59:16,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 21:59:16,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-22 21:59:16,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:59:16,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-22 21:59:16,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2509, Unknown=1, NotChecked=0, Total=2756 [2023-11-22 21:59:16,745 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 46 states have internal predecessors, (101), 20 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (22), 22 states have call predecessors, (22), 20 states have call successors, (22) [2023-11-22 21:59:18,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:59:18,791 INFO L93 Difference]: Finished difference Result 154 states and 162 transitions. [2023-11-22 21:59:18,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-22 21:59:18,792 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 46 states have internal predecessors, (101), 20 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (22), 22 states have call predecessors, (22), 20 states have call successors, (22) Word has length 102 [2023-11-22 21:59:18,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:59:18,793 INFO L225 Difference]: With dead ends: 154 [2023-11-22 21:59:18,793 INFO L226 Difference]: Without dead ends: 152 [2023-11-22 21:59:18,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 117 SyntacticMatches, 9 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2878 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1103, Invalid=8402, Unknown=1, NotChecked=0, Total=9506 [2023-11-22 21:59:18,795 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 279 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 1993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-22 21:59:18,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 736 Invalid, 1993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-22 21:59:18,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-22 21:59:18,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 109. [2023-11-22 21:59:18,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 85 states have internal predecessors, (88), 14 states have call successors, (14), 10 states have call predecessors, (14), 10 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-22 21:59:18,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2023-11-22 21:59:18,812 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 102 [2023-11-22 21:59:18,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:59:18,812 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2023-11-22 21:59:18,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 46 states have internal predecessors, (101), 20 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (22), 22 states have call predecessors, (22), 20 states have call successors, (22) [2023-11-22 21:59:18,816 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2023-11-22 21:59:18,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-22 21:59:18,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:59:18,817 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:59:18,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-22 21:59:19,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:59:19,029 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:59:19,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:59:19,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1598859825, now seen corresponding path program 22 times [2023-11-22 21:59:19,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:59:19,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332258511] [2023-11-22 21:59:19,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:59:19,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:59:19,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:19,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:59:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:19,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:59:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:19,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:59:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:19,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:59:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:19,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:59:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:19,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:59:19,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:19,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:59:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:19,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 21:59:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:19,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 21:59:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:19,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 21:59:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:19,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-22 21:59:19,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 30 proven. 241 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-11-22 21:59:19,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:59:19,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332258511] [2023-11-22 21:59:19,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332258511] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:59:19,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129266078] [2023-11-22 21:59:19,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 21:59:19,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:59:19,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:59:19,681 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) [2023-11-22 21:59:19,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-22 21:59:19,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 21:59:19,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:59:19,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-22 21:59:19,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:59:20,342 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 [2023-11-22 21:59:20,863 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 22 treesize of output 10 [2023-11-22 21:59:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 48 proven. 241 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-11-22 21:59:20,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:59:21,087 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 19 treesize of output 17 [2023-11-22 21:59:21,089 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 23 treesize of output 19 [2023-11-22 21:59:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 30 proven. 241 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-11-22 21:59:21,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129266078] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:59:21,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:59:21,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 26] total 51 [2023-11-22 21:59:21,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894711979] [2023-11-22 21:59:21,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:59:21,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-22 21:59:21,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:59:21,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-22 21:59:21,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2354, Unknown=0, NotChecked=0, Total=2550 [2023-11-22 21:59:21,210 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand has 51 states, 50 states have (on average 2.2) internal successors, (110), 47 states have internal predecessors, (110), 20 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) [2023-11-22 21:59:22,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:59:22,490 INFO L93 Difference]: Finished difference Result 150 states and 157 transitions. [2023-11-22 21:59:22,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-22 21:59:22,490 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.2) internal successors, (110), 47 states have internal predecessors, (110), 20 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) Word has length 105 [2023-11-22 21:59:22,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:59:22,491 INFO L225 Difference]: With dead ends: 150 [2023-11-22 21:59:22,491 INFO L226 Difference]: Without dead ends: 148 [2023-11-22 21:59:22,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 197 SyntacticMatches, 10 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=569, Invalid=6073, Unknown=0, NotChecked=0, Total=6642 [2023-11-22 21:59:22,492 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 126 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 1652 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-22 21:59:22,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 769 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1652 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-22 21:59:22,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-22 21:59:22,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 113. [2023-11-22 21:59:22,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 89 states have internal predecessors, (92), 14 states have call successors, (14), 10 states have call predecessors, (14), 10 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-22 21:59:22,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 120 transitions. [2023-11-22 21:59:22,511 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 120 transitions. Word has length 105 [2023-11-22 21:59:22,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:59:22,512 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 120 transitions. [2023-11-22 21:59:22,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.2) internal successors, (110), 47 states have internal predecessors, (110), 20 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) [2023-11-22 21:59:22,512 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 120 transitions. [2023-11-22 21:59:22,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-22 21:59:22,513 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:59:22,513 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:59:22,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-22 21:59:22,716 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,SelfDestructingSolverStorable25 [2023-11-22 21:59:22,717 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:59:22,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:59:22,719 INFO L85 PathProgramCache]: Analyzing trace with hash 451334740, now seen corresponding path program 23 times [2023-11-22 21:59:22,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:59:22,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079884175] [2023-11-22 21:59:22,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:59:22,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:59:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:23,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:59:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:23,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:59:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:23,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:59:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:23,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:59:23,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:23,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:59:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:23,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:59:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:23,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:59:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:23,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 21:59:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:23,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 21:59:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:23,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 21:59:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:23,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-22 21:59:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 101 proven. 142 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-22 21:59:23,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:59:23,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079884175] [2023-11-22 21:59:23,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079884175] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:59:23,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29472654] [2023-11-22 21:59:23,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 21:59:23,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:59:23,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:59:23,090 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) [2023-11-22 21:59:23,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-22 21:59:23,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-22 21:59:23,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:59:23,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-22 21:59:23,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:59:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 126 proven. 117 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-22 21:59:23,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:59:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 126 proven. 117 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-22 21:59:23,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29472654] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:59:23,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:59:23,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-11-22 21:59:23,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142281402] [2023-11-22 21:59:23,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:59:23,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-22 21:59:23,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:59:23,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-22 21:59:23,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2023-11-22 21:59:23,734 INFO L87 Difference]: Start difference. First operand 113 states and 120 transitions. Second operand has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 35 states have internal predecessors, (92), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-11-22 21:59:23,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:59:23,988 INFO L93 Difference]: Finished difference Result 154 states and 161 transitions. [2023-11-22 21:59:23,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-22 21:59:23,989 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 35 states have internal predecessors, (92), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 108 [2023-11-22 21:59:23,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:59:23,990 INFO L225 Difference]: With dead ends: 154 [2023-11-22 21:59:23,990 INFO L226 Difference]: Without dead ends: 120 [2023-11-22 21:59:23,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 207 SyntacticMatches, 19 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2023-11-22 21:59:23,992 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 74 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:59:23,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 156 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 21:59:23,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-11-22 21:59:24,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 109. [2023-11-22 21:59:24,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 85 states have internal predecessors, (87), 14 states have call successors, (14), 10 states have call predecessors, (14), 10 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-22 21:59:24,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2023-11-22 21:59:24,013 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 108 [2023-11-22 21:59:24,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:59:24,013 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2023-11-22 21:59:24,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 35 states have internal predecessors, (92), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-11-22 21:59:24,014 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2023-11-22 21:59:24,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-22 21:59:24,015 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:59:24,015 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:59:24,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-22 21:59:24,218 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,SelfDestructingSolverStorable26 [2023-11-22 21:59:24,218 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:59:24,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:59:24,219 INFO L85 PathProgramCache]: Analyzing trace with hash 617780594, now seen corresponding path program 24 times [2023-11-22 21:59:24,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:59:24,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512208389] [2023-11-22 21:59:24,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:59:24,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:59:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:24,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:59:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:24,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:59:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:24,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:59:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:24,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:59:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:24,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:59:24,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:24,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:59:24,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:24,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:59:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:24,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 21:59:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:24,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 21:59:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:24,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 21:59:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:24,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-22 21:59:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:24,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-22 21:59:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 30 proven. 275 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-22 21:59:24,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:59:24,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512208389] [2023-11-22 21:59:24,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512208389] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:59:24,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468808022] [2023-11-22 21:59:24,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 21:59:24,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:59:24,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:59:24,871 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) [2023-11-22 21:59:24,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-22 21:59:25,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-11-22 21:59:25,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:59:25,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-22 21:59:25,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:59:25,812 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 [2023-11-22 21:59:25,989 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 30 treesize of output 14 [2023-11-22 21:59:26,554 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 22 treesize of output 10 [2023-11-22 21:59:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 59 proven. 302 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-11-22 21:59:26,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:59:28,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468808022] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:59:28,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 21:59:28,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31] total 55 [2023-11-22 21:59:28,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559654779] [2023-11-22 21:59:28,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 21:59:28,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-11-22 21:59:28,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:59:28,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-11-22 21:59:28,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=3022, Unknown=1, NotChecked=0, Total=3306 [2023-11-22 21:59:28,949 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand has 55 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 50 states have internal predecessors, (111), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (24), 24 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-22 21:59:31,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:59:31,042 INFO L93 Difference]: Finished difference Result 171 states and 178 transitions. [2023-11-22 21:59:31,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-22 21:59:31,043 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 50 states have internal predecessors, (111), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (24), 24 states have call predecessors, (24), 22 states have call successors, (24) Word has length 112 [2023-11-22 21:59:31,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:59:31,043 INFO L225 Difference]: With dead ends: 171 [2023-11-22 21:59:31,043 INFO L226 Difference]: Without dead ends: 169 [2023-11-22 21:59:31,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 128 SyntacticMatches, 10 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3411 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1277, Invalid=10064, Unknown=1, NotChecked=0, Total=11342 [2023-11-22 21:59:31,045 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 251 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 1754 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-22 21:59:31,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 789 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1754 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-22 21:59:31,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-22 21:59:31,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 123. [2023-11-22 21:59:31,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 96 states have internal predecessors, (99), 15 states have call successors, (15), 12 states have call predecessors, (15), 12 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-22 21:59:31,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 129 transitions. [2023-11-22 21:59:31,072 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 129 transitions. Word has length 112 [2023-11-22 21:59:31,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:59:31,072 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 129 transitions. [2023-11-22 21:59:31,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 50 states have internal predecessors, (111), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (24), 24 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-22 21:59:31,073 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 129 transitions. [2023-11-22 21:59:31,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-22 21:59:31,073 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:59:31,073 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:59:31,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-22 21:59:31,290 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,SelfDestructingSolverStorable27 [2023-11-22 21:59:31,290 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:59:31,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:59:31,291 INFO L85 PathProgramCache]: Analyzing trace with hash 372413299, now seen corresponding path program 25 times [2023-11-22 21:59:31,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:59:31,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088390660] [2023-11-22 21:59:31,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:59:31,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:59:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:31,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:59:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:31,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:59:31,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:31,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:59:31,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:31,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:59:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:31,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:59:31,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:31,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:59:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:31,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:59:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:31,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 21:59:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:31,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 21:59:31,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:31,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 21:59:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:31,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-22 21:59:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:31,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-22 21:59:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 33 proven. 298 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-22 21:59:31,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:59:31,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088390660] [2023-11-22 21:59:31,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088390660] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:59:31,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039600285] [2023-11-22 21:59:31,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 21:59:31,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:59:31,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:59:31,846 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) [2023-11-22 21:59:31,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-22 21:59:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:31,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-22 21:59:31,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:59:32,498 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 [2023-11-22 21:59:32,931 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 22 treesize of output 10 [2023-11-22 21:59:32,968 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 45 proven. 307 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2023-11-22 21:59:32,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:59:33,200 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 19 treesize of output 17 [2023-11-22 21:59:33,201 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 23 treesize of output 19 [2023-11-22 21:59:33,397 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 33 proven. 298 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-22 21:59:33,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039600285] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:59:33,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:59:33,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 28] total 55 [2023-11-22 21:59:33,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747980379] [2023-11-22 21:59:33,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:59:33,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-11-22 21:59:33,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:59:33,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-11-22 21:59:33,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2757, Unknown=0, NotChecked=0, Total=2970 [2023-11-22 21:59:33,400 INFO L87 Difference]: Start difference. First operand 123 states and 129 transitions. Second operand has 55 states, 54 states have (on average 2.2222222222222223) internal successors, (120), 51 states have internal predecessors, (120), 22 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2023-11-22 21:59:34,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:59:34,904 INFO L93 Difference]: Finished difference Result 167 states and 173 transitions. [2023-11-22 21:59:34,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-22 21:59:34,904 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.2222222222222223) internal successors, (120), 51 states have internal predecessors, (120), 22 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) Word has length 115 [2023-11-22 21:59:34,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:59:34,905 INFO L225 Difference]: With dead ends: 167 [2023-11-22 21:59:34,905 INFO L226 Difference]: Without dead ends: 165 [2023-11-22 21:59:34,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 216 SyntacticMatches, 11 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=624, Invalid=7208, Unknown=0, NotChecked=0, Total=7832 [2023-11-22 21:59:34,906 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 191 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 1911 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 1971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-22 21:59:34,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 815 Invalid, 1971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1911 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-22 21:59:34,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-11-22 21:59:34,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 127. [2023-11-22 21:59:34,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 100 states have internal predecessors, (103), 15 states have call successors, (15), 12 states have call predecessors, (15), 12 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-22 21:59:34,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 133 transitions. [2023-11-22 21:59:34,953 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 133 transitions. Word has length 115 [2023-11-22 21:59:34,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:59:34,953 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 133 transitions. [2023-11-22 21:59:34,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.2222222222222223) internal successors, (120), 51 states have internal predecessors, (120), 22 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2023-11-22 21:59:34,953 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 133 transitions. [2023-11-22 21:59:34,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-22 21:59:34,954 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:59:34,954 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:59:34,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-22 21:59:35,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-22 21:59:35,165 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:59:35,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:59:35,165 INFO L85 PathProgramCache]: Analyzing trace with hash 669665746, now seen corresponding path program 26 times [2023-11-22 21:59:35,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:59:35,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809052610] [2023-11-22 21:59:35,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:59:35,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:59:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:35,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:59:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:35,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:59:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:35,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:59:35,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:35,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:59:35,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:35,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:59:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:35,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:59:35,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:35,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:59:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:35,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 21:59:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:35,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 21:59:35,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:35,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 21:59:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:35,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-22 21:59:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:35,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-22 21:59:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:35,551 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 127 proven. 173 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-22 21:59:35,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:59:35,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809052610] [2023-11-22 21:59:35,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809052610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:59:35,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163425667] [2023-11-22 21:59:35,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:59:35,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:59:35,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:59:35,553 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) [2023-11-22 21:59:35,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-22 21:59:35,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:59:35,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:59:35,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-22 21:59:35,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:59:35,981 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 155 proven. 145 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-22 21:59:35,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:59:36,217 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 155 proven. 145 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-22 21:59:36,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163425667] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:59:36,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:59:36,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2023-11-22 21:59:36,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161188608] [2023-11-22 21:59:36,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:59:36,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-22 21:59:36,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:59:36,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-22 21:59:36,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2023-11-22 21:59:36,219 INFO L87 Difference]: Start difference. First operand 127 states and 133 transitions. Second operand has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 12 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-11-22 21:59:36,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:59:36,459 INFO L93 Difference]: Finished difference Result 171 states and 177 transitions. [2023-11-22 21:59:36,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-22 21:59:36,459 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 12 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 118 [2023-11-22 21:59:36,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:59:36,460 INFO L225 Difference]: With dead ends: 171 [2023-11-22 21:59:36,461 INFO L226 Difference]: Without dead ends: 134 [2023-11-22 21:59:36,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 226 SyntacticMatches, 21 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=572, Invalid=1780, Unknown=0, NotChecked=0, Total=2352 [2023-11-22 21:59:36,462 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 110 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:59:36,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 190 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 21:59:36,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-22 21:59:36,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 123. [2023-11-22 21:59:36,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 96 states have internal predecessors, (98), 15 states have call successors, (15), 12 states have call predecessors, (15), 12 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-22 21:59:36,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 128 transitions. [2023-11-22 21:59:36,487 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 128 transitions. Word has length 118 [2023-11-22 21:59:36,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:59:36,488 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 128 transitions. [2023-11-22 21:59:36,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 12 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-11-22 21:59:36,489 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 128 transitions. [2023-11-22 21:59:36,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-22 21:59:36,489 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:59:36,489 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:59:36,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-22 21:59:36,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:59:36,700 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:59:36,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:59:36,701 INFO L85 PathProgramCache]: Analyzing trace with hash 933241204, now seen corresponding path program 27 times [2023-11-22 21:59:36,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:59:36,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732243585] [2023-11-22 21:59:36,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:59:36,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:59:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:37,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:59:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:37,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:59:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:37,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:59:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:37,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:59:37,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:37,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:59:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:37,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:59:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:37,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:59:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:37,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 21:59:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:37,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 21:59:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:37,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 21:59:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:37,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-22 21:59:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:37,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-22 21:59:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:37,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-22 21:59:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 33 proven. 335 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-11-22 21:59:37,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:59:37,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732243585] [2023-11-22 21:59:37,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732243585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:59:37,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501190487] [2023-11-22 21:59:37,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 21:59:37,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:59:37,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:59:37,430 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) [2023-11-22 21:59:37,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-22 21:59:37,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-11-22 21:59:37,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:59:37,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-22 21:59:37,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:59:38,501 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 [2023-11-22 21:59:38,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 21:59:38,674 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 34 treesize of output 14 [2023-11-22 21:59:39,155 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 22 treesize of output 10 [2023-11-22 21:59:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 66 proven. 365 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2023-11-22 21:59:39,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:59:43,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501190487] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:59:43,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 21:59:43,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 57 [2023-11-22 21:59:43,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131583981] [2023-11-22 21:59:43,536 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 21:59:43,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-22 21:59:43,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:59:43,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-22 21:59:43,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=3145, Unknown=2, NotChecked=0, Total=3422 [2023-11-22 21:59:43,538 INFO L87 Difference]: Start difference. First operand 123 states and 128 transitions. Second operand has 57 states, 56 states have (on average 2.1607142857142856) internal successors, (121), 53 states have internal predecessors, (121), 24 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (26), 25 states have call predecessors, (26), 24 states have call successors, (26) [2023-11-22 21:59:45,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:59:45,169 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2023-11-22 21:59:45,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-22 21:59:45,170 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 2.1607142857142856) internal successors, (121), 53 states have internal predecessors, (121), 24 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (26), 25 states have call predecessors, (26), 24 states have call successors, (26) Word has length 122 [2023-11-22 21:59:45,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:59:45,170 INFO L225 Difference]: With dead ends: 138 [2023-11-22 21:59:45,170 INFO L226 Difference]: Without dead ends: 136 [2023-11-22 21:59:45,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 143 SyntacticMatches, 11 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2204 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=711, Invalid=6597, Unknown=2, NotChecked=0, Total=7310 [2023-11-22 21:59:45,172 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 110 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 2191 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 2219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:59:45,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 744 Invalid, 2219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2191 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-22 21:59:45,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-22 21:59:45,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 118. [2023-11-22 21:59:45,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-22 21:59:45,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2023-11-22 21:59:45,192 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 122 [2023-11-22 21:59:45,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:59:45,193 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2023-11-22 21:59:45,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 2.1607142857142856) internal successors, (121), 53 states have internal predecessors, (121), 24 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (26), 25 states have call predecessors, (26), 24 states have call successors, (26) [2023-11-22 21:59:45,193 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2023-11-22 21:59:45,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-22 21:59:45,194 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:59:45,194 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:59:45,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-22 21:59:45,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:59:45,406 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:59:45,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:59:45,406 INFO L85 PathProgramCache]: Analyzing trace with hash 871002161, now seen corresponding path program 28 times [2023-11-22 21:59:45,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:59:45,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680046482] [2023-11-22 21:59:45,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:59:45,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:59:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:46,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:59:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:46,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:59:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:46,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:59:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:46,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:59:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:46,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:59:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:46,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:59:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:46,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:59:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:46,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 21:59:46,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:46,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 21:59:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:46,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 21:59:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:46,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-22 21:59:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:46,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-22 21:59:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:46,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-22 21:59:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 36 proven. 361 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-11-22 21:59:46,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:59:46,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680046482] [2023-11-22 21:59:46,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680046482] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:59:46,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106392997] [2023-11-22 21:59:46,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 21:59:46,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:59:46,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:59:46,150 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) [2023-11-22 21:59:46,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-22 21:59:46,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 21:59:46,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:59:46,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-22 21:59:46,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:59:46,993 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 [2023-11-22 21:59:47,602 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 22 treesize of output 10 [2023-11-22 21:59:47,635 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 45 proven. 376 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-11-22 21:59:47,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:59:47,869 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 19 treesize of output 17 [2023-11-22 21:59:47,871 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 23 treesize of output 19 [2023-11-22 21:59:48,071 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 36 proven. 361 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-11-22 21:59:48,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106392997] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:59:48,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:59:48,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 30] total 59 [2023-11-22 21:59:48,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886832772] [2023-11-22 21:59:48,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:59:48,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-11-22 21:59:48,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:59:48,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-11-22 21:59:48,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3192, Unknown=0, NotChecked=0, Total=3422 [2023-11-22 21:59:48,073 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 59 states, 58 states have (on average 2.2413793103448274) internal successors, (130), 55 states have internal predecessors, (130), 24 states have call successors, (25), 1 states have call predecessors, (25), 2 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) [2023-11-22 21:59:49,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:59:49,933 INFO L93 Difference]: Finished difference Result 170 states and 176 transitions. [2023-11-22 21:59:49,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-22 21:59:49,934 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 2.2413793103448274) internal successors, (130), 55 states have internal predecessors, (130), 24 states have call successors, (25), 1 states have call predecessors, (25), 2 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) Word has length 125 [2023-11-22 21:59:49,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:59:49,935 INFO L225 Difference]: With dead ends: 170 [2023-11-22 21:59:49,935 INFO L226 Difference]: Without dead ends: 168 [2023-11-22 21:59:49,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 235 SyntacticMatches, 12 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2657 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=679, Invalid=8441, Unknown=0, NotChecked=0, Total=9120 [2023-11-22 21:59:49,936 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 180 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 2501 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 2562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:59:49,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 1032 Invalid, 2562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2501 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-22 21:59:49,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-22 21:59:49,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2023-11-22 21:59:49,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-22 21:59:49,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 130 transitions. [2023-11-22 21:59:49,964 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 130 transitions. Word has length 125 [2023-11-22 21:59:49,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:59:49,964 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 130 transitions. [2023-11-22 21:59:49,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 2.2413793103448274) internal successors, (130), 55 states have internal predecessors, (130), 24 states have call successors, (25), 1 states have call predecessors, (25), 2 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) [2023-11-22 21:59:49,964 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 130 transitions. [2023-11-22 21:59:49,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-22 21:59:49,965 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:59:49,965 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:59:49,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-22 21:59:50,168 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,SelfDestructingSolverStorable31 [2023-11-22 21:59:50,168 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:59:50,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:59:50,169 INFO L85 PathProgramCache]: Analyzing trace with hash 2133544020, now seen corresponding path program 29 times [2023-11-22 21:59:50,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:59:50,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121478508] [2023-11-22 21:59:50,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:59:50,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:59:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:50,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:59:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:50,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:59:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:50,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:59:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:50,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:59:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:50,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:59:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:50,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:59:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:50,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:59:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:50,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 21:59:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:50,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 21:59:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:50,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 21:59:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:50,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-22 21:59:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:50,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-22 21:59:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:50,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-22 21:59:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 156 proven. 207 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-22 21:59:50,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:59:50,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121478508] [2023-11-22 21:59:50,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121478508] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:59:50,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790138580] [2023-11-22 21:59:50,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 21:59:50,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:59:50,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:59:50,484 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) [2023-11-22 21:59:50,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-22 21:59:50,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-11-22 21:59:50,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:59:50,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-22 21:59:50,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:59:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 187 proven. 176 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-22 21:59:51,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:59:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 187 proven. 176 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-22 21:59:51,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790138580] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:59:51,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:59:51,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-11-22 21:59:51,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559821039] [2023-11-22 21:59:51,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:59:51,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-22 21:59:51,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:59:51,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-22 21:59:51,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2023-11-22 21:59:51,252 INFO L87 Difference]: Start difference. First operand 125 states and 130 transitions. Second operand has 41 states, 41 states have (on average 2.6341463414634148) internal successors, (108), 41 states have internal predecessors, (108), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-11-22 21:59:51,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:59:51,508 INFO L93 Difference]: Finished difference Result 174 states and 180 transitions. [2023-11-22 21:59:51,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-22 21:59:51,509 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.6341463414634148) internal successors, (108), 41 states have internal predecessors, (108), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 128 [2023-11-22 21:59:51,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:59:51,510 INFO L225 Difference]: With dead ends: 174 [2023-11-22 21:59:51,510 INFO L226 Difference]: Without dead ends: 134 [2023-11-22 21:59:51,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 245 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2023-11-22 21:59:51,511 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 96 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:59:51,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 177 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 21:59:51,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-22 21:59:51,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 121. [2023-11-22 21:59:51,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-22 21:59:51,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2023-11-22 21:59:51,537 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 128 [2023-11-22 21:59:51,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:59:51,537 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2023-11-22 21:59:51,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.6341463414634148) internal successors, (108), 41 states have internal predecessors, (108), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-11-22 21:59:51,537 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2023-11-22 21:59:51,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-22 21:59:51,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:59:51,538 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:59:51,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-22 21:59:51,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:59:51,761 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:59:51,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:59:51,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1591529230, now seen corresponding path program 30 times [2023-11-22 21:59:51,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:59:51,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115055396] [2023-11-22 21:59:51,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:59:51,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:59:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:52,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:59:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:52,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:59:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:52,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:59:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:52,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:59:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:52,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:59:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:52,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:59:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:52,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:59:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:52,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 21:59:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:52,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 21:59:52,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:52,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 21:59:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:52,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-22 21:59:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:52,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-22 21:59:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:52,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-22 21:59:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:52,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-22 21:59:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 36 proven. 401 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2023-11-22 21:59:52,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:59:52,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115055396] [2023-11-22 21:59:52,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115055396] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:59:52,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503378057] [2023-11-22 21:59:52,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 21:59:52,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:59:52,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:59:52,606 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) [2023-11-22 21:59:52,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-22 21:59:53,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2023-11-22 21:59:53,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:59:53,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-22 21:59:53,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:59:53,634 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 [2023-11-22 21:59:53,829 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-22 21:59:53,829 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 42 treesize of output 16 [2023-11-22 21:59:54,452 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 28 treesize of output 10 [2023-11-22 21:59:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 82 proven. 401 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-11-22 21:59:54,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:59:56,820 WARN L854 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (< 12 (select (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) (+ |c_ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~i~0#1|)) (+ 44 |c_ULTIMATE.start_main_~#a~0#1.offset|)))) is different from false [2023-11-22 21:59:56,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503378057] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:59:56,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 21:59:56,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33] total 61 [2023-11-22 21:59:56,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992436088] [2023-11-22 21:59:56,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 21:59:56,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-22 21:59:56,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:59:56,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-22 21:59:56,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=3639, Unknown=1, NotChecked=122, Total=4032 [2023-11-22 21:59:56,827 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand has 61 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 57 states have internal predecessors, (130), 25 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) [2023-11-22 21:59:58,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:59:58,709 INFO L93 Difference]: Finished difference Result 136 states and 139 transitions. [2023-11-22 21:59:58,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-22 21:59:58,710 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 57 states have internal predecessors, (130), 25 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) Word has length 132 [2023-11-22 21:59:58,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:59:58,710 INFO L225 Difference]: With dead ends: 136 [2023-11-22 21:59:58,710 INFO L226 Difference]: Without dead ends: 134 [2023-11-22 21:59:58,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 154 SyntacticMatches, 12 SemanticMatches, 92 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2663 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=720, Invalid=7839, Unknown=1, NotChecked=182, Total=8742 [2023-11-22 21:59:58,712 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 106 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 2563 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 2594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:59:58,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 894 Invalid, 2594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2563 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-22 21:59:58,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-22 21:59:58,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2023-11-22 21:59:58,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 14 states have call successors, (14), 12 states have call predecessors, (14), 12 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-22 21:59:58,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 131 transitions. [2023-11-22 21:59:58,761 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 131 transitions. Word has length 132 [2023-11-22 21:59:58,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:59:58,761 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 131 transitions. [2023-11-22 21:59:58,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 57 states have internal predecessors, (130), 25 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) [2023-11-22 21:59:58,761 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 131 transitions. [2023-11-22 21:59:58,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-22 21:59:58,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:59:58,763 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:59:58,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-22 21:59:58,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:59:58,973 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:59:58,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:59:58,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1097709581, now seen corresponding path program 31 times [2023-11-22 21:59:58,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:59:58,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163752439] [2023-11-22 21:59:58,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:59:58,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:59:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:59,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 21:59:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:59,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:59:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:59,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:59:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:59,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 21:59:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:59,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:59:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:59,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:59:59,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:59,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:59:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:59,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 21:59:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:59,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 21:59:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:59,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 21:59:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:59,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-22 21:59:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:59,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-22 21:59:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:59,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-22 21:59:59,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:59,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-22 21:59:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:59:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 39 proven. 430 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2023-11-22 21:59:59,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:59:59,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163752439] [2023-11-22 21:59:59,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163752439] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:59:59,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779632787] [2023-11-22 21:59:59,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 21:59:59,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:59:59,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:59:59,986 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) [2023-11-22 21:59:59,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-22 22:00:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:00,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-22 22:00:00,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:00:00,700 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 [2023-11-22 22:00:01,522 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 22 treesize of output 10 [2023-11-22 22:00:01,548 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 45 proven. 451 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2023-11-22 22:00:01,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:00:02,017 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 19 treesize of output 17 [2023-11-22 22:00:02,018 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 23 treesize of output 19 [2023-11-22 22:00:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 39 proven. 430 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2023-11-22 22:00:02,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779632787] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:00:02,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:00:02,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 32] total 89 [2023-11-22 22:00:02,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814294605] [2023-11-22 22:00:02,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:00:02,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-11-22 22:00:02,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:00:02,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-11-22 22:00:02,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=7381, Unknown=0, NotChecked=0, Total=7832 [2023-11-22 22:00:02,679 INFO L87 Difference]: Start difference. First operand 128 states and 131 transitions. Second operand has 89 states, 88 states have (on average 2.2386363636363638) internal successors, (197), 83 states have internal predecessors, (197), 38 states have call successors, (39), 1 states have call predecessors, (39), 2 states have return successors, (40), 40 states have call predecessors, (40), 38 states have call successors, (40) [2023-11-22 22:00:06,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:00:06,006 INFO L93 Difference]: Finished difference Result 183 states and 189 transitions. [2023-11-22 22:00:06,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-22 22:00:06,007 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 2.2386363636363638) internal successors, (197), 83 states have internal predecessors, (197), 38 states have call successors, (39), 1 states have call predecessors, (39), 2 states have return successors, (40), 40 states have call predecessors, (40), 38 states have call successors, (40) Word has length 135 [2023-11-22 22:00:06,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:00:06,008 INFO L225 Difference]: With dead ends: 183 [2023-11-22 22:00:06,008 INFO L226 Difference]: Without dead ends: 181 [2023-11-22 22:00:06,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4818 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1061, Invalid=15451, Unknown=0, NotChecked=0, Total=16512 [2023-11-22 22:00:06,009 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 270 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 3874 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 3952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 3874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-22 22:00:06,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 1482 Invalid, 3952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 3874 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-22 22:00:06,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-22 22:00:06,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 135. [2023-11-22 22:00:06,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 107 states have (on average 1.02803738317757) internal successors, (110), 107 states have internal predecessors, (110), 15 states have call successors, (15), 12 states have call predecessors, (15), 12 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-22 22:00:06,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 140 transitions. [2023-11-22 22:00:06,040 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 140 transitions. Word has length 135 [2023-11-22 22:00:06,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:00:06,040 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 140 transitions. [2023-11-22 22:00:06,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 88 states have (on average 2.2386363636363638) internal successors, (197), 83 states have internal predecessors, (197), 38 states have call successors, (39), 1 states have call predecessors, (39), 2 states have return successors, (40), 40 states have call predecessors, (40), 38 states have call successors, (40) [2023-11-22 22:00:06,041 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 140 transitions. [2023-11-22 22:00:06,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-22 22:00:06,041 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:00:06,041 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:00:06,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-22 22:00:06,253 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,SelfDestructingSolverStorable34 [2023-11-22 22:00:06,254 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:00:06,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:00:06,254 INFO L85 PathProgramCache]: Analyzing trace with hash 20464978, now seen corresponding path program 32 times [2023-11-22 22:00:06,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:00:06,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654544951] [2023-11-22 22:00:06,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:06,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:00:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:06,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 22:00:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:06,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 22:00:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:06,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 22:00:06,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:06,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 22:00:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:06,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 22:00:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:06,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 22:00:06,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:06,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 22:00:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:06,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 22:00:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:06,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 22:00:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:06,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 22:00:06,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:06,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-22 22:00:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:06,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-22 22:00:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:06,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-22 22:00:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:06,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-22 22:00:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 188 proven. 244 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-11-22 22:00:06,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:00:06,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654544951] [2023-11-22 22:00:06,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654544951] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:06,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866891122] [2023-11-22 22:00:06,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 22:00:06,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:06,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:00:06,744 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) [2023-11-22 22:00:06,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-22 22:00:06,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:00:06,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:00:06,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-22 22:00:06,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:00:07,301 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 222 proven. 210 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-11-22 22:00:07,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:00:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 222 proven. 210 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-11-22 22:00:07,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866891122] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:00:07,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:00:07,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2023-11-22 22:00:07,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955196013] [2023-11-22 22:00:07,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:00:07,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-22 22:00:07,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:00:07,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-22 22:00:07,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2023-11-22 22:00:07,677 INFO L87 Difference]: Start difference. First operand 135 states and 140 transitions. Second operand has 44 states, 44 states have (on average 2.6363636363636362) internal successors, (116), 44 states have internal predecessors, (116), 14 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2023-11-22 22:00:07,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:00:07,959 INFO L93 Difference]: Finished difference Result 187 states and 193 transitions. [2023-11-22 22:00:07,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-22 22:00:07,968 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.6363636363636362) internal successors, (116), 44 states have internal predecessors, (116), 14 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 138 [2023-11-22 22:00:07,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:00:07,985 INFO L225 Difference]: With dead ends: 187 [2023-11-22 22:00:07,985 INFO L226 Difference]: Without dead ends: 144 [2023-11-22 22:00:07,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 264 SyntacticMatches, 25 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=765, Invalid=2427, Unknown=0, NotChecked=0, Total=3192 [2023-11-22 22:00:07,987 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 182 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 22:00:07,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 181 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 22:00:07,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-22 22:00:08,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 131. [2023-11-22 22:00:08,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 15 states have call successors, (15), 12 states have call predecessors, (15), 12 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-22 22:00:08,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2023-11-22 22:00:08,038 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 138 [2023-11-22 22:00:08,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:00:08,038 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2023-11-22 22:00:08,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.6363636363636362) internal successors, (116), 44 states have internal predecessors, (116), 14 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2023-11-22 22:00:08,038 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2023-11-22 22:00:08,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-11-22 22:00:08,039 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:00:08,039 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:00:08,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-22 22:00:08,239 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,SelfDestructingSolverStorable35 [2023-11-22 22:00:08,239 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:00:08,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:00:08,240 INFO L85 PathProgramCache]: Analyzing trace with hash -867841164, now seen corresponding path program 33 times [2023-11-22 22:00:08,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:00:08,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630733766] [2023-11-22 22:00:08,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:08,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:00:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:09,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 22:00:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:09,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 22:00:09,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:09,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 22:00:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:09,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 22:00:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:09,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 22:00:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:09,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 22:00:09,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:09,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 22:00:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:09,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 22:00:09,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:09,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 22:00:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:09,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 22:00:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:09,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-22 22:00:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:09,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-22 22:00:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:09,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-22 22:00:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:09,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-22 22:00:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:09,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-22 22:00:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 39 proven. 473 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-11-22 22:00:09,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:00:09,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630733766] [2023-11-22 22:00:09,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630733766] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:09,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507294635] [2023-11-22 22:00:09,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 22:00:09,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:09,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:00:09,406 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) [2023-11-22 22:00:09,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-22 22:00:10,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-11-22 22:00:10,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:00:10,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-22 22:00:10,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:00:10,454 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 [2023-11-22 22:00:10,652 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-22 22:00:10,653 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 42 treesize of output 16 [2023-11-22 22:00:11,185 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 28 treesize of output 10 [2023-11-22 22:00:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 89 proven. 473 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2023-11-22 22:00:11,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:00:19,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507294635] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:19,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 22:00:19,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 65 [2023-11-22 22:00:19,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450565858] [2023-11-22 22:00:19,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 22:00:19,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-11-22 22:00:19,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:00:19,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-11-22 22:00:19,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=5797, Unknown=4, NotChecked=0, Total=6162 [2023-11-22 22:00:19,818 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 65 states, 64 states have (on average 2.203125) internal successors, (141), 61 states have internal predecessors, (141), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) [2023-11-22 22:00:22,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:00:22,427 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2023-11-22 22:00:22,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-22 22:00:22,428 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 2.203125) internal successors, (141), 61 states have internal predecessors, (141), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) Word has length 142 [2023-11-22 22:00:22,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:00:22,429 INFO L225 Difference]: With dead ends: 146 [2023-11-22 22:00:22,429 INFO L226 Difference]: Without dead ends: 144 [2023-11-22 22:00:22,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3786 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=946, Invalid=11482, Unknown=4, NotChecked=0, Total=12432 [2023-11-22 22:00:22,437 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 150 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1149 SdHoareTripleChecker+Invalid, 3076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-22 22:00:22,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 1149 Invalid, 3076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-22 22:00:22,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-22 22:00:22,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 138. [2023-11-22 22:00:22,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 15 states have call successors, (15), 13 states have call predecessors, (15), 13 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-22 22:00:22,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2023-11-22 22:00:22,465 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 142 [2023-11-22 22:00:22,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:00:22,466 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2023-11-22 22:00:22,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 2.203125) internal successors, (141), 61 states have internal predecessors, (141), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) [2023-11-22 22:00:22,466 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2023-11-22 22:00:22,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-22 22:00:22,467 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:00:22,467 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:00:22,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-22 22:00:22,680 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,SelfDestructingSolverStorable36 [2023-11-22 22:00:22,680 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:00:22,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:00:22,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1852606001, now seen corresponding path program 34 times [2023-11-22 22:00:22,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:00:22,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671464634] [2023-11-22 22:00:22,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:22,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:00:22,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:23,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 22:00:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:23,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 22:00:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:23,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 22:00:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:23,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 22:00:23,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:23,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 22:00:23,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:23,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 22:00:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:23,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 22:00:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:23,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 22:00:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:23,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 22:00:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:23,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 22:00:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:23,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-22 22:00:23,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:23,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-22 22:00:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:23,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-22 22:00:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:23,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-22 22:00:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:23,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-22 22:00:23,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 42 proven. 505 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-11-22 22:00:23,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:00:23,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671464634] [2023-11-22 22:00:23,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671464634] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:23,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590954980] [2023-11-22 22:00:23,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 22:00:23,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:23,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:00:23,528 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) [2023-11-22 22:00:23,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-22 22:00:23,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 22:00:23,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:00:23,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-22 22:00:23,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:00:24,635 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 [2023-11-22 22:00:25,385 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 22 treesize of output 10 [2023-11-22 22:00:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 48 proven. 529 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-22 22:00:25,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:00:25,728 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 19 treesize of output 17 [2023-11-22 22:00:25,729 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 23 treesize of output 19 [2023-11-22 22:00:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 42 proven. 505 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-11-22 22:00:25,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590954980] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:00:25,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:00:25,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 34] total 67 [2023-11-22 22:00:25,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706030967] [2023-11-22 22:00:25,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:00:25,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-11-22 22:00:25,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:00:25,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-11-22 22:00:25,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=4158, Unknown=0, NotChecked=0, Total=4422 [2023-11-22 22:00:25,914 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand has 67 states, 66 states have (on average 2.272727272727273) internal successors, (150), 63 states have internal predecessors, (150), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) [2023-11-22 22:00:28,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:00:28,336 INFO L93 Difference]: Finished difference Result 196 states and 202 transitions. [2023-11-22 22:00:28,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-22 22:00:28,336 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 2.272727272727273) internal successors, (150), 63 states have internal predecessors, (150), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) Word has length 145 [2023-11-22 22:00:28,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:00:28,337 INFO L225 Difference]: With dead ends: 196 [2023-11-22 22:00:28,337 INFO L226 Difference]: Without dead ends: 194 [2023-11-22 22:00:28,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 273 SyntacticMatches, 14 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3588 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=789, Invalid=11201, Unknown=0, NotChecked=0, Total=11990 [2023-11-22 22:00:28,339 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 163 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 3142 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 3215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 3142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-22 22:00:28,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 1308 Invalid, 3215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 3142 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-22 22:00:28,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-11-22 22:00:28,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 145. [2023-11-22 22:00:28,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 115 states have (on average 1.0260869565217392) internal successors, (118), 115 states have internal predecessors, (118), 16 states have call successors, (16), 13 states have call predecessors, (16), 13 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-22 22:00:28,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 150 transitions. [2023-11-22 22:00:28,373 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 150 transitions. Word has length 145 [2023-11-22 22:00:28,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:00:28,373 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 150 transitions. [2023-11-22 22:00:28,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 2.272727272727273) internal successors, (150), 63 states have internal predecessors, (150), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) [2023-11-22 22:00:28,373 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 150 transitions. [2023-11-22 22:00:28,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-22 22:00:28,374 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:00:28,374 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:00:28,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-22 22:00:28,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:28,585 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:00:28,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:00:28,586 INFO L85 PathProgramCache]: Analyzing trace with hash 661222996, now seen corresponding path program 35 times [2023-11-22 22:00:28,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:00:28,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64020039] [2023-11-22 22:00:28,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:28,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:00:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:29,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 22:00:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:29,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 22:00:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:29,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 22:00:29,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:29,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 22:00:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:29,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 22:00:29,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:29,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 22:00:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:29,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 22:00:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:29,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 22:00:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:29,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 22:00:29,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:29,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 22:00:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:29,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-22 22:00:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:29,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-22 22:00:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:29,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-22 22:00:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:29,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-22 22:00:29,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:29,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-22 22:00:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:29,114 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 223 proven. 284 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-22 22:00:29,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:00:29,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64020039] [2023-11-22 22:00:29,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64020039] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:29,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643724039] [2023-11-22 22:00:29,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 22:00:29,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:29,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:00:29,115 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) [2023-11-22 22:00:29,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-22 22:00:29,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-11-22 22:00:29,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:00:29,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-22 22:00:29,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:00:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 260 proven. 247 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-22 22:00:29,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:00:30,276 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 260 proven. 247 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-22 22:00:30,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643724039] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:00:30,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:00:30,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2023-11-22 22:00:30,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067612506] [2023-11-22 22:00:30,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:00:30,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-22 22:00:30,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:00:30,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-22 22:00:30,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2023-11-22 22:00:30,277 INFO L87 Difference]: Start difference. First operand 145 states and 150 transitions. Second operand has 47 states, 47 states have (on average 2.6382978723404253) internal successors, (124), 47 states have internal predecessors, (124), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-11-22 22:00:30,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:00:30,640 INFO L93 Difference]: Finished difference Result 200 states and 206 transitions. [2023-11-22 22:00:30,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-22 22:00:30,640 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.6382978723404253) internal successors, (124), 47 states have internal predecessors, (124), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 148 [2023-11-22 22:00:30,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:00:30,641 INFO L225 Difference]: With dead ends: 200 [2023-11-22 22:00:30,644 INFO L226 Difference]: Without dead ends: 154 [2023-11-22 22:00:30,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 283 SyntacticMatches, 27 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=872, Invalid=2788, Unknown=0, NotChecked=0, Total=3660 [2023-11-22 22:00:30,646 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 150 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:00:30,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 198 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:00:30,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-22 22:00:30,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 141. [2023-11-22 22:00:30,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 16 states have call successors, (16), 13 states have call predecessors, (16), 13 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-22 22:00:30,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2023-11-22 22:00:30,706 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 148 [2023-11-22 22:00:30,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:00:30,707 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2023-11-22 22:00:30,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.6382978723404253) internal successors, (124), 47 states have internal predecessors, (124), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-11-22 22:00:30,707 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2023-11-22 22:00:30,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-22 22:00:30,714 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:00:30,714 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:00:30,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-22 22:00:30,934 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,SelfDestructingSolverStorable38 [2023-11-22 22:00:30,934 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:00:30,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:00:30,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1192647794, now seen corresponding path program 36 times [2023-11-22 22:00:30,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:00:30,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748855] [2023-11-22 22:00:30,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:30,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:00:30,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:31,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 22:00:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:31,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 22:00:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:31,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 22:00:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:31,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 22:00:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:31,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 22:00:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:31,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 22:00:31,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:31,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 22:00:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:31,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 22:00:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:31,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 22:00:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:31,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 22:00:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:31,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-22 22:00:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:31,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-22 22:00:31,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:31,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-22 22:00:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:31,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-22 22:00:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:31,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-22 22:00:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:31,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-22 22:00:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 42 proven. 551 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2023-11-22 22:00:31,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:00:31,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748855] [2023-11-22 22:00:31,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748855] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:31,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008761658] [2023-11-22 22:00:31,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 22:00:31,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:31,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:00:31,945 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) [2023-11-22 22:00:31,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-22 22:00:32,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2023-11-22 22:00:32,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:00:32,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-22 22:00:32,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:00:33,239 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 [2023-11-22 22:00:33,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2023-11-22 22:00:34,130 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 28 treesize of output 10 [2023-11-22 22:00:34,161 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 96 proven. 551 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-11-22 22:00:34,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:00:36,454 WARN L854 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (< 14 (select (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) (+ |c_ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~i~0#1|)) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 52)))) is different from false [2023-11-22 22:00:36,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008761658] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:36,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 22:00:36,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37] total 69 [2023-11-22 22:00:36,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098197950] [2023-11-22 22:00:36,460 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 22:00:36,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-11-22 22:00:36,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:00:36,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-11-22 22:00:36,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=4524, Unknown=1, NotChecked=136, Total=4970 [2023-11-22 22:00:36,461 INFO L87 Difference]: Start difference. First operand 141 states and 145 transitions. Second operand has 69 states, 69 states have (on average 2.1739130434782608) internal successors, (150), 65 states have internal predecessors, (150), 29 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) [2023-11-22 22:00:39,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:00:39,220 INFO L93 Difference]: Finished difference Result 215 states and 224 transitions. [2023-11-22 22:00:39,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-11-22 22:00:39,220 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1739130434782608) internal successors, (150), 65 states have internal predecessors, (150), 29 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) Word has length 152 [2023-11-22 22:00:39,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:00:39,221 INFO L225 Difference]: With dead ends: 215 [2023-11-22 22:00:39,221 INFO L226 Difference]: Without dead ends: 213 [2023-11-22 22:00:39,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 178 SyntacticMatches, 15 SemanticMatches, 134 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5944 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1445, Invalid=16648, Unknown=1, NotChecked=266, Total=18360 [2023-11-22 22:00:39,223 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 409 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 3130 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 3235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 3130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-22 22:00:39,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 1046 Invalid, 3235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 3130 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-22 22:00:39,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-22 22:00:39,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 155. [2023-11-22 22:00:39,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 121 states have (on average 1.0330578512396693) internal successors, (125), 122 states have internal predecessors, (125), 19 states have call successors, (19), 14 states have call predecessors, (19), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-22 22:00:39,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 163 transitions. [2023-11-22 22:00:39,259 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 163 transitions. Word has length 152 [2023-11-22 22:00:39,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:00:39,259 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 163 transitions. [2023-11-22 22:00:39,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1739130434782608) internal successors, (150), 65 states have internal predecessors, (150), 29 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) [2023-11-22 22:00:39,260 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 163 transitions. [2023-11-22 22:00:39,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-22 22:00:39,260 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:00:39,260 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:00:39,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-11-22 22:00:39,473 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,SelfDestructingSolverStorable39 [2023-11-22 22:00:39,474 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:00:39,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:00:39,474 INFO L85 PathProgramCache]: Analyzing trace with hash -2088407949, now seen corresponding path program 37 times [2023-11-22 22:00:39,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:00:39,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853564367] [2023-11-22 22:00:39,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:39,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:00:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:40,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 22:00:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:40,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 22:00:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:40,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 22:00:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:40,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 22:00:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:40,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 22:00:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:40,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 22:00:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:40,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 22:00:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:40,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 22:00:40,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:40,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 22:00:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:40,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 22:00:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:40,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-22 22:00:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:40,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-22 22:00:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:40,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-22 22:00:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:40,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-22 22:00:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:40,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-22 22:00:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:40,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-22 22:00:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:40,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 45 proven. 586 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2023-11-22 22:00:40,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:00:40,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853564367] [2023-11-22 22:00:40,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853564367] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:40,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134893336] [2023-11-22 22:00:40,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 22:00:40,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:40,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:00:40,414 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) [2023-11-22 22:00:40,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-22 22:00:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:40,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-22 22:00:40,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:00:41,373 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 [2023-11-22 22:00:42,332 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 22 treesize of output 10 [2023-11-22 22:00:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 45 proven. 586 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2023-11-22 22:00:42,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:00:42,759 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 19 treesize of output 17 [2023-11-22 22:00:42,762 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 23 treesize of output 19 [2023-11-22 22:00:42,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 45 proven. 586 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2023-11-22 22:00:42,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134893336] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:00:42,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:00:42,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 36] total 71 [2023-11-22 22:00:42,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898375274] [2023-11-22 22:00:42,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:00:42,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-22 22:00:42,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:00:42,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-22 22:00:42,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=4689, Unknown=0, NotChecked=0, Total=4970 [2023-11-22 22:00:42,976 INFO L87 Difference]: Start difference. First operand 155 states and 163 transitions. Second operand has 71 states, 70 states have (on average 2.2857142857142856) internal successors, (160), 67 states have internal predecessors, (160), 30 states have call successors, (31), 1 states have call predecessors, (31), 2 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) [2023-11-22 22:00:45,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:00:45,957 INFO L93 Difference]: Finished difference Result 211 states and 219 transitions. [2023-11-22 22:00:45,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-22 22:00:45,958 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 2.2857142857142856) internal successors, (160), 67 states have internal predecessors, (160), 30 states have call successors, (31), 1 states have call predecessors, (31), 2 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) Word has length 155 [2023-11-22 22:00:45,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:00:45,959 INFO L225 Difference]: With dead ends: 211 [2023-11-22 22:00:45,959 INFO L226 Difference]: Without dead ends: 209 [2023-11-22 22:00:45,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 292 SyntacticMatches, 15 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4106 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=844, Invalid=12728, Unknown=0, NotChecked=0, Total=13572 [2023-11-22 22:00:45,961 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 220 mSDsluCounter, 1380 mSDsCounter, 0 mSdLazyCounter, 3888 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 3965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 3888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-22 22:00:45,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 1421 Invalid, 3965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 3888 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-22 22:00:45,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-11-22 22:00:46,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 159. [2023-11-22 22:00:46,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 125 states have (on average 1.032) internal successors, (129), 126 states have internal predecessors, (129), 19 states have call successors, (19), 14 states have call predecessors, (19), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-22 22:00:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 167 transitions. [2023-11-22 22:00:46,003 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 167 transitions. Word has length 155 [2023-11-22 22:00:46,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:00:46,003 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 167 transitions. [2023-11-22 22:00:46,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 2.2857142857142856) internal successors, (160), 67 states have internal predecessors, (160), 30 states have call successors, (31), 1 states have call predecessors, (31), 2 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) [2023-11-22 22:00:46,003 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 167 transitions. [2023-11-22 22:00:46,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-22 22:00:46,004 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:00:46,004 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:00:46,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-11-22 22:00:46,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:46,216 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:00:46,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:00:46,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1140642002, now seen corresponding path program 38 times [2023-11-22 22:00:46,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:00:46,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077086671] [2023-11-22 22:00:46,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:46,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:00:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:46,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 22:00:46,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:46,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 22:00:46,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:46,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 22:00:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:46,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 22:00:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:46,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 22:00:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:46,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 22:00:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:46,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 22:00:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:46,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 22:00:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:46,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 22:00:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:46,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 22:00:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:46,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-22 22:00:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:46,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-22 22:00:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:46,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-22 22:00:46,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:46,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-22 22:00:46,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:46,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-22 22:00:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:46,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-22 22:00:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 261 proven. 327 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-22 22:00:46,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:00:46,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077086671] [2023-11-22 22:00:46,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077086671] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:46,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563831346] [2023-11-22 22:00:46,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 22:00:46,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:46,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:00:46,833 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) [2023-11-22 22:00:46,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-22 22:00:46,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:00:46,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:00:46,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-22 22:00:47,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:00:47,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 301 proven. 287 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-22 22:00:47,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:00:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 301 proven. 287 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-22 22:00:47,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563831346] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:00:47,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:00:47,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2023-11-22 22:00:47,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088213881] [2023-11-22 22:00:47,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:00:47,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-22 22:00:47,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:00:47,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-22 22:00:47,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2023-11-22 22:00:47,826 INFO L87 Difference]: Start difference. First operand 159 states and 167 transitions. Second operand has 50 states, 50 states have (on average 2.64) internal successors, (132), 50 states have internal predecessors, (132), 16 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2023-11-22 22:00:48,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:00:48,194 INFO L93 Difference]: Finished difference Result 215 states and 223 transitions. [2023-11-22 22:00:48,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-22 22:00:48,195 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.64) internal successors, (132), 50 states have internal predecessors, (132), 16 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) Word has length 158 [2023-11-22 22:00:48,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:00:48,196 INFO L225 Difference]: With dead ends: 215 [2023-11-22 22:00:48,196 INFO L226 Difference]: Without dead ends: 166 [2023-11-22 22:00:48,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 302 SyntacticMatches, 29 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2023-11-22 22:00:48,196 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 126 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:00:48,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 224 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:00:48,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-11-22 22:00:48,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 155. [2023-11-22 22:00:48,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 121 states have (on average 1.024793388429752) internal successors, (124), 122 states have internal predecessors, (124), 19 states have call successors, (19), 14 states have call predecessors, (19), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-22 22:00:48,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 162 transitions. [2023-11-22 22:00:48,265 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 162 transitions. Word has length 158 [2023-11-22 22:00:48,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:00:48,266 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 162 transitions. [2023-11-22 22:00:48,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.64) internal successors, (132), 50 states have internal predecessors, (132), 16 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2023-11-22 22:00:48,266 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 162 transitions. [2023-11-22 22:00:48,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-11-22 22:00:48,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:00:48,267 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:00:48,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-11-22 22:00:48,478 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,SelfDestructingSolverStorable41 [2023-11-22 22:00:48,479 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:00:48,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:00:48,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1483548020, now seen corresponding path program 39 times [2023-11-22 22:00:48,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:00:48,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455218342] [2023-11-22 22:00:48,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:48,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:00:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:49,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 22:00:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:49,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 22:00:49,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:49,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 22:00:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:49,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 22:00:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:49,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 22:00:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:49,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 22:00:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:49,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 22:00:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:49,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 22:00:49,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:49,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 22:00:49,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:49,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 22:00:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:49,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-22 22:00:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:49,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-22 22:00:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:49,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-22 22:00:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:49,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-22 22:00:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:49,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-22 22:00:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:49,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-22 22:00:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:49,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-22 22:00:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 45 proven. 635 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-11-22 22:00:49,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:00:49,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455218342] [2023-11-22 22:00:49,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455218342] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:49,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052461656] [2023-11-22 22:00:49,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 22:00:49,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:49,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:00:49,617 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) [2023-11-22 22:00:49,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-22 22:00:50,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2023-11-22 22:00:50,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:00:50,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 75 conjunts are in the unsatisfiable core [2023-11-22 22:00:50,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:00:51,226 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 [2023-11-22 22:00:51,424 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-22 22:00:51,425 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 42 treesize of output 16 [2023-11-22 22:00:52,127 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 28 treesize of output 10 [2023-11-22 22:00:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 103 proven. 635 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2023-11-22 22:00:52,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:01:08,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052461656] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:01:08,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 22:01:08,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 73 [2023-11-22 22:01:08,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712838520] [2023-11-22 22:01:08,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 22:01:08,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-11-22 22:01:08,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:01:08,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-11-22 22:01:08,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=5212, Unknown=8, NotChecked=0, Total=5550 [2023-11-22 22:01:08,799 INFO L87 Difference]: Start difference. First operand 155 states and 162 transitions. Second operand has 73 states, 72 states have (on average 2.2222222222222223) internal successors, (160), 69 states have internal predecessors, (160), 31 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2023-11-22 22:01:11,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:01:11,451 INFO L93 Difference]: Finished difference Result 174 states and 179 transitions. [2023-11-22 22:01:11,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-22 22:01:11,452 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 2.2222222222222223) internal successors, (160), 69 states have internal predecessors, (160), 31 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) Word has length 162 [2023-11-22 22:01:11,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:01:11,452 INFO L225 Difference]: With dead ends: 174 [2023-11-22 22:01:11,452 INFO L226 Difference]: Without dead ends: 172 [2023-11-22 22:01:11,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 191 SyntacticMatches, 16 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3886 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=888, Invalid=11094, Unknown=8, NotChecked=0, Total=11990 [2023-11-22 22:01:11,457 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 153 mSDsluCounter, 1244 mSDsCounter, 0 mSdLazyCounter, 3545 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 3587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 3545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-22 22:01:11,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1283 Invalid, 3587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 3545 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-22 22:01:11,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-11-22 22:01:11,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 158. [2023-11-22 22:01:11,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 17 states have call successors, (17), 15 states have call predecessors, (17), 15 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-22 22:01:11,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 161 transitions. [2023-11-22 22:01:11,524 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 161 transitions. Word has length 162 [2023-11-22 22:01:11,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:01:11,525 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 161 transitions. [2023-11-22 22:01:11,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 2.2222222222222223) internal successors, (160), 69 states have internal predecessors, (160), 31 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2023-11-22 22:01:11,525 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 161 transitions. [2023-11-22 22:01:11,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-22 22:01:11,526 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:01:11,526 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:01:11,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-11-22 22:01:11,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:01:11,732 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:01:11,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:01:11,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1171188785, now seen corresponding path program 40 times [2023-11-22 22:01:11,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:01:11,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905029909] [2023-11-22 22:01:11,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:01:11,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:01:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:12,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 22:01:12,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:12,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 22:01:12,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:12,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 22:01:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:12,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 22:01:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:12,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 22:01:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:12,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 22:01:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:12,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 22:01:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:12,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 22:01:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:12,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 22:01:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:12,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 22:01:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:12,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-22 22:01:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:12,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-22 22:01:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:12,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-22 22:01:12,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:12,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-22 22:01:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:12,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-22 22:01:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:12,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-22 22:01:12,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:12,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-22 22:01:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 48 proven. 673 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-11-22 22:01:12,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:01:12,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905029909] [2023-11-22 22:01:12,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905029909] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:01:12,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816574697] [2023-11-22 22:01:12,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 22:01:12,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:01:12,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:01:12,824 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) [2023-11-22 22:01:12,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-22 22:01:13,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 22:01:13,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:01:13,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 86 conjunts are in the unsatisfiable core [2023-11-22 22:01:13,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:01:14,102 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 [2023-11-22 22:01:15,109 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 22 treesize of output 10 [2023-11-22 22:01:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 57 proven. 700 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2023-11-22 22:01:15,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:01:15,586 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 19 treesize of output 17 [2023-11-22 22:01:15,587 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 23 treesize of output 19 [2023-11-22 22:01:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 48 proven. 673 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-11-22 22:01:15,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816574697] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:01:15,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:01:15,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39, 38] total 75 [2023-11-22 22:01:15,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932356822] [2023-11-22 22:01:15,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:01:15,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-11-22 22:01:15,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:01:15,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-11-22 22:01:15,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=5252, Unknown=0, NotChecked=0, Total=5550 [2023-11-22 22:01:15,827 INFO L87 Difference]: Start difference. First operand 158 states and 161 transitions. Second operand has 75 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 71 states have internal predecessors, (170), 32 states have call successors, (33), 1 states have call predecessors, (33), 2 states have return successors, (33), 33 states have call predecessors, (33), 32 states have call successors, (33) [2023-11-22 22:01:19,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:01:19,211 INFO L93 Difference]: Finished difference Result 222 states and 228 transitions. [2023-11-22 22:01:19,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-11-22 22:01:19,211 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 71 states have internal predecessors, (170), 32 states have call successors, (33), 1 states have call predecessors, (33), 2 states have return successors, (33), 33 states have call predecessors, (33), 32 states have call successors, (33) Word has length 165 [2023-11-22 22:01:19,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:01:19,212 INFO L225 Difference]: With dead ends: 222 [2023-11-22 22:01:19,212 INFO L226 Difference]: Without dead ends: 220 [2023-11-22 22:01:19,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 311 SyntacticMatches, 16 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4659 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=899, Invalid=14353, Unknown=0, NotChecked=0, Total=15252 [2023-11-22 22:01:19,214 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 244 mSDsluCounter, 1620 mSDsCounter, 0 mSdLazyCounter, 4233 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1663 SdHoareTripleChecker+Invalid, 4322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 4233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-22 22:01:19,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 1663 Invalid, 4322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 4233 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-22 22:01:19,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-22 22:01:19,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 165. [2023-11-22 22:01:19,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 18 states have call successors, (18), 15 states have call predecessors, (18), 15 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-22 22:01:19,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 170 transitions. [2023-11-22 22:01:19,290 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 170 transitions. Word has length 165 [2023-11-22 22:01:19,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:01:19,290 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 170 transitions. [2023-11-22 22:01:19,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 71 states have internal predecessors, (170), 32 states have call successors, (33), 1 states have call predecessors, (33), 2 states have return successors, (33), 33 states have call predecessors, (33), 32 states have call successors, (33) [2023-11-22 22:01:19,290 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 170 transitions. [2023-11-22 22:01:19,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-11-22 22:01:19,291 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:01:19,291 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:01:19,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-11-22 22:01:19,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:01:19,506 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:01:19,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:01:19,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1423617964, now seen corresponding path program 41 times [2023-11-22 22:01:19,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:01:19,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062540054] [2023-11-22 22:01:19,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:01:19,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:01:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:20,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 22:01:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:20,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 22:01:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:20,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 22:01:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:20,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 22:01:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:20,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 22:01:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:20,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 22:01:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:20,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 22:01:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:20,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 22:01:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:20,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 22:01:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:20,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 22:01:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:20,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-22 22:01:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:20,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-22 22:01:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:20,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-22 22:01:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:20,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-22 22:01:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:20,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-22 22:01:20,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:20,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-22 22:01:20,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:20,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-22 22:01:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 302 proven. 373 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-22 22:01:20,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:01:20,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062540054] [2023-11-22 22:01:20,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062540054] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:01:20,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666356028] [2023-11-22 22:01:20,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 22:01:20,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:01:20,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:01:20,128 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) [2023-11-22 22:01:20,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-22 22:01:20,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2023-11-22 22:01:20,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:01:20,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-22 22:01:20,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:01:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 345 proven. 330 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-22 22:01:21,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:01:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 345 proven. 330 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-22 22:01:21,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666356028] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:01:21,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:01:21,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2023-11-22 22:01:21,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929330210] [2023-11-22 22:01:21,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:01:21,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-22 22:01:21,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:01:21,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-22 22:01:21,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2023-11-22 22:01:21,588 INFO L87 Difference]: Start difference. First operand 165 states and 170 transitions. Second operand has 53 states, 53 states have (on average 2.641509433962264) internal successors, (140), 53 states have internal predecessors, (140), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-11-22 22:01:21,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:01:21,992 INFO L93 Difference]: Finished difference Result 226 states and 232 transitions. [2023-11-22 22:01:21,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-22 22:01:21,992 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.641509433962264) internal successors, (140), 53 states have internal predecessors, (140), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 168 [2023-11-22 22:01:21,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:01:21,993 INFO L225 Difference]: With dead ends: 226 [2023-11-22 22:01:21,993 INFO L226 Difference]: Without dead ends: 174 [2023-11-22 22:01:21,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 321 SyntacticMatches, 31 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2023-11-22 22:01:21,994 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 172 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:01:21,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 211 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:01:21,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-11-22 22:01:22,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 161. [2023-11-22 22:01:22,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 18 states have call successors, (18), 15 states have call predecessors, (18), 15 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-22 22:01:22,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 165 transitions. [2023-11-22 22:01:22,036 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 165 transitions. Word has length 168 [2023-11-22 22:01:22,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:01:22,036 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 165 transitions. [2023-11-22 22:01:22,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.641509433962264) internal successors, (140), 53 states have internal predecessors, (140), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-11-22 22:01:22,037 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 165 transitions. [2023-11-22 22:01:22,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-22 22:01:22,037 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:01:22,038 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:01:22,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-11-22 22:01:22,249 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,SelfDestructingSolverStorable44 [2023-11-22 22:01:22,250 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:01:22,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:01:22,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1074272242, now seen corresponding path program 42 times [2023-11-22 22:01:22,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:01:22,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259728399] [2023-11-22 22:01:22,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:01:22,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:01:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:23,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 22:01:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:23,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 22:01:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:23,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 22:01:23,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:23,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 22:01:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:23,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 22:01:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:23,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 22:01:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:23,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 22:01:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:23,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 22:01:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:23,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 22:01:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:23,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 22:01:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:23,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-22 22:01:23,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:23,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-22 22:01:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:23,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-22 22:01:23,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:23,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-22 22:01:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:23,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-22 22:01:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:23,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-22 22:01:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:23,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-22 22:01:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:23,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-22 22:01:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1289 backedges. 48 proven. 725 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2023-11-22 22:01:23,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:01:23,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259728399] [2023-11-22 22:01:23,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259728399] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:01:23,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611469872] [2023-11-22 22:01:23,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 22:01:23,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:01:23,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:01:23,300 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) [2023-11-22 22:01:23,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-22 22:01:23,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2023-11-22 22:01:23,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:01:23,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 87 conjunts are in the unsatisfiable core [2023-11-22 22:01:23,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:01:24,953 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 [2023-11-22 22:01:25,207 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-22 22:01:25,208 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 42 treesize of output 16 [2023-11-22 22:01:26,177 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 28 treesize of output 10 [2023-11-22 22:01:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1289 backedges. 110 proven. 725 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-11-22 22:01:26,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:01:34,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611469872] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:01:34,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 22:01:34,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 78 [2023-11-22 22:01:34,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322537077] [2023-11-22 22:01:34,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 22:01:34,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-11-22 22:01:34,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:01:34,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-11-22 22:01:34,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=6112, Unknown=4, NotChecked=0, Total=6480 [2023-11-22 22:01:34,800 INFO L87 Difference]: Start difference. First operand 161 states and 165 transitions. Second operand has 78 states, 77 states have (on average 2.207792207792208) internal successors, (170), 74 states have internal predecessors, (170), 33 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 35 states have call predecessors, (35), 33 states have call successors, (35) [2023-11-22 22:01:37,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:01:37,817 INFO L93 Difference]: Finished difference Result 176 states and 179 transitions. [2023-11-22 22:01:37,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-22 22:01:37,817 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 2.207792207792208) internal successors, (170), 74 states have internal predecessors, (170), 33 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 35 states have call predecessors, (35), 33 states have call successors, (35) Word has length 172 [2023-11-22 22:01:37,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:01:37,818 INFO L225 Difference]: With dead ends: 176 [2023-11-22 22:01:37,818 INFO L226 Difference]: Without dead ends: 174 [2023-11-22 22:01:37,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 201 SyntacticMatches, 17 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4589 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=982, Invalid=13056, Unknown=4, NotChecked=0, Total=14042 [2023-11-22 22:01:37,819 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 147 mSDsluCounter, 1448 mSDsCounter, 0 mSdLazyCounter, 4193 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 1488 SdHoareTripleChecker+Invalid, 4235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 4193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-22 22:01:37,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 1488 Invalid, 4235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 4193 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-22 22:01:37,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-11-22 22:01:37,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 168. [2023-11-22 22:01:37,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 18 states have call successors, (18), 16 states have call predecessors, (18), 16 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-22 22:01:37,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 171 transitions. [2023-11-22 22:01:37,884 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 171 transitions. Word has length 172 [2023-11-22 22:01:37,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:01:37,884 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 171 transitions. [2023-11-22 22:01:37,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 2.207792207792208) internal successors, (170), 74 states have internal predecessors, (170), 33 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 35 states have call predecessors, (35), 33 states have call successors, (35) [2023-11-22 22:01:37,885 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 171 transitions. [2023-11-22 22:01:37,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-11-22 22:01:37,885 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:01:37,885 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:01:37,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-11-22 22:01:38,098 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,SelfDestructingSolverStorable45 [2023-11-22 22:01:38,099 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:01:38,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:01:38,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1848639731, now seen corresponding path program 43 times [2023-11-22 22:01:38,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:01:38,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004394709] [2023-11-22 22:01:38,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:01:38,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:01:38,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:39,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 22:01:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:39,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 22:01:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:39,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 22:01:39,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:39,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 22:01:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:39,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 22:01:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:39,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 22:01:39,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:39,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 22:01:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:39,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 22:01:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:39,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 22:01:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:39,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 22:01:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:39,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-22 22:01:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:39,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-22 22:01:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:39,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-22 22:01:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:39,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-22 22:01:39,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:39,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-22 22:01:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:39,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-22 22:01:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:39,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-22 22:01:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:39,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-22 22:01:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 51 proven. 766 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2023-11-22 22:01:39,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:01:39,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004394709] [2023-11-22 22:01:39,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004394709] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:01:39,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715386620] [2023-11-22 22:01:39,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 22:01:39,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:01:39,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:01:39,255 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) [2023-11-22 22:01:39,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-22 22:01:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:39,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 90 conjunts are in the unsatisfiable core [2023-11-22 22:01:39,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:01:40,613 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 [2023-11-22 22:01:41,752 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 22 treesize of output 10 [2023-11-22 22:01:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 60 proven. 796 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2023-11-22 22:01:41,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:01:42,302 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 19 treesize of output 17 [2023-11-22 22:01:42,303 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 23 treesize of output 19 [2023-11-22 22:01:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 51 proven. 766 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2023-11-22 22:01:42,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715386620] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:01:42,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:01:42,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 40] total 81 [2023-11-22 22:01:42,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260615164] [2023-11-22 22:01:42,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:01:42,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-11-22 22:01:42,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:01:42,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-11-22 22:01:42,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=6156, Unknown=0, NotChecked=0, Total=6480 [2023-11-22 22:01:42,629 INFO L87 Difference]: Start difference. First operand 168 states and 171 transitions. Second operand has 81 states, 79 states have (on average 2.3037974683544302) internal successors, (182), 76 states have internal predecessors, (182), 35 states have call successors, (36), 1 states have call predecessors, (36), 2 states have return successors, (36), 36 states have call predecessors, (36), 35 states have call successors, (36) [2023-11-22 22:01:45,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:01:45,872 INFO L93 Difference]: Finished difference Result 235 states and 241 transitions. [2023-11-22 22:01:45,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-11-22 22:01:45,872 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 79 states have (on average 2.3037974683544302) internal successors, (182), 76 states have internal predecessors, (182), 35 states have call successors, (36), 1 states have call predecessors, (36), 2 states have return successors, (36), 36 states have call predecessors, (36), 35 states have call successors, (36) Word has length 175 [2023-11-22 22:01:45,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:01:45,873 INFO L225 Difference]: With dead ends: 235 [2023-11-22 22:01:45,873 INFO L226 Difference]: Without dead ends: 233 [2023-11-22 22:01:45,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 329 SyntacticMatches, 17 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5398 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=966, Invalid=16590, Unknown=0, NotChecked=0, Total=17556 [2023-11-22 22:01:45,875 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 238 mSDsluCounter, 1681 mSDsCounter, 0 mSdLazyCounter, 4467 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 4554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 4467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-22 22:01:45,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 1726 Invalid, 4554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 4467 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-22 22:01:45,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-11-22 22:01:45,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 175. [2023-11-22 22:01:45,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 139 states have (on average 1.0215827338129497) internal successors, (142), 139 states have internal predecessors, (142), 19 states have call successors, (19), 16 states have call predecessors, (19), 16 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-22 22:01:45,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 180 transitions. [2023-11-22 22:01:45,924 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 180 transitions. Word has length 175 [2023-11-22 22:01:45,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:01:45,925 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 180 transitions. [2023-11-22 22:01:45,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 79 states have (on average 2.3037974683544302) internal successors, (182), 76 states have internal predecessors, (182), 35 states have call successors, (36), 1 states have call predecessors, (36), 2 states have return successors, (36), 36 states have call predecessors, (36), 35 states have call successors, (36) [2023-11-22 22:01:45,925 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 180 transitions. [2023-11-22 22:01:45,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-11-22 22:01:45,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:01:45,926 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:01:45,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-11-22 22:01:46,137 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,SelfDestructingSolverStorable46 [2023-11-22 22:01:46,139 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:01:46,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:01:46,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1533809582, now seen corresponding path program 44 times [2023-11-22 22:01:46,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:01:46,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910280500] [2023-11-22 22:01:46,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:01:46,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:01:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:46,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 22:01:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:46,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 22:01:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:46,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 22:01:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:46,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 22:01:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:46,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 22:01:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:46,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 22:01:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:46,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 22:01:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:46,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 22:01:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:46,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 22:01:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:46,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 22:01:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:46,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-22 22:01:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:46,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-22 22:01:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:46,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-22 22:01:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:46,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-22 22:01:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:46,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-22 22:01:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:46,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-22 22:01:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:46,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-22 22:01:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:46,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-22 22:01:46,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 346 proven. 422 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-11-22 22:01:46,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:01:46,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910280500] [2023-11-22 22:01:46,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910280500] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:01:46,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906181252] [2023-11-22 22:01:46,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 22:01:46,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:01:46,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:01:46,857 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) [2023-11-22 22:01:46,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-22 22:01:47,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:01:47,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:01:47,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-22 22:01:47,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:01:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 392 proven. 376 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-11-22 22:01:47,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:01:47,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 392 proven. 376 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-11-22 22:01:47,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906181252] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:01:47,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:01:47,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 56 [2023-11-22 22:01:47,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99751589] [2023-11-22 22:01:47,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:01:47,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-22 22:01:47,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:01:47,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-22 22:01:47,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2023-11-22 22:01:47,915 INFO L87 Difference]: Start difference. First operand 175 states and 180 transitions. Second operand has 56 states, 56 states have (on average 2.642857142857143) internal successors, (148), 56 states have internal predecessors, (148), 18 states have call successors, (19), 1 states have call predecessors, (19), 1 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2023-11-22 22:01:48,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:01:48,319 INFO L93 Difference]: Finished difference Result 239 states and 245 transitions. [2023-11-22 22:01:48,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-22 22:01:48,319 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.642857142857143) internal successors, (148), 56 states have internal predecessors, (148), 18 states have call successors, (19), 1 states have call predecessors, (19), 1 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) Word has length 178 [2023-11-22 22:01:48,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:01:48,320 INFO L225 Difference]: With dead ends: 239 [2023-11-22 22:01:48,320 INFO L226 Difference]: Without dead ends: 184 [2023-11-22 22:01:48,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 340 SyntacticMatches, 33 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2412 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1235, Invalid=4021, Unknown=0, NotChecked=0, Total=5256 [2023-11-22 22:01:48,322 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 152 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:01:48,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 271 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:01:48,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-22 22:01:48,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 171. [2023-11-22 22:01:48,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 19 states have call successors, (19), 16 states have call predecessors, (19), 16 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-22 22:01:48,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 175 transitions. [2023-11-22 22:01:48,368 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 175 transitions. Word has length 178 [2023-11-22 22:01:48,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:01:48,369 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 175 transitions. [2023-11-22 22:01:48,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.642857142857143) internal successors, (148), 56 states have internal predecessors, (148), 18 states have call successors, (19), 1 states have call predecessors, (19), 1 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2023-11-22 22:01:48,369 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 175 transitions. [2023-11-22 22:01:48,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-11-22 22:01:48,370 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:01:48,370 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:01:48,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-11-22 22:01:48,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:01:48,576 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:01:48,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:01:48,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1603940212, now seen corresponding path program 45 times [2023-11-22 22:01:48,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:01:48,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089472751] [2023-11-22 22:01:48,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:01:48,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:01:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:49,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 22:01:49,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:49,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 22:01:49,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:49,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 22:01:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:49,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-22 22:01:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:49,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 22:01:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:49,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 22:01:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:49,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 22:01:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:49,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-22 22:01:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:49,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 22:01:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:49,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 22:01:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:49,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-22 22:01:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:49,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-22 22:01:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:49,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-22 22:01:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:49,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-22 22:01:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:49,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-22 22:01:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:49,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-22 22:01:49,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:49,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-22 22:01:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:49,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-22 22:01:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:49,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-22 22:01:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1454 backedges. 51 proven. 821 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2023-11-22 22:01:49,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:01:49,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089472751] [2023-11-22 22:01:49,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089472751] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:01:49,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866948764] [2023-11-22 22:01:49,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 22:01:49,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:01:49,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:01:49,863 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:01:49,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-22 22:01:51,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2023-11-22 22:01:51,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:01:51,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 91 conjunts are in the unsatisfiable core [2023-11-22 22:01:51,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:01:52,219 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 [2023-11-22 22:01:52,409 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-22 22:01:52,409 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 42 treesize of output 16 Killed by 15