./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-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 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-21 21:01:44,627 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-21 21:01:44,725 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-21 21:01:44,732 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-21 21:01:44,736 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-21 21:01:44,766 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-21 21:01:44,767 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-21 21:01:44,768 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-21 21:01:44,768 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-21 21:01:44,769 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-21 21:01:44,769 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-21 21:01:44,770 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-21 21:01:44,770 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-21 21:01:44,772 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-21 21:01:44,773 INFO L153 SettingsManager]: * Use SBE=true [2024-11-21 21:01:44,773 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-21 21:01:44,773 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-21 21:01:44,774 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-21 21:01:44,774 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-21 21:01:44,774 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-21 21:01:44,774 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-21 21:01:44,778 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-21 21:01:44,778 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-21 21:01:44,778 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-21 21:01:44,779 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-21 21:01:44,779 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-21 21:01:44,779 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-21 21:01:44,779 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-21 21:01:44,780 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-21 21:01:44,780 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-21 21:01:44,780 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-21 21:01:44,780 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-21 21:01:44,780 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-21 21:01:44,781 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-21 21:01:44,781 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-21 21:01:44,781 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-21 21:01:44,781 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-21 21:01:44,782 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-21 21:01:44,782 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-21 21:01:44,782 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-21 21:01:44,783 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-21 21:01:44,783 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-21 21:01:44,784 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f [2024-11-21 21:01:45,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-21 21:01:45,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-21 21:01:45,048 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-21 21:01:45,050 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-21 21:01:45,050 INFO L274 PluginConnector]: CDTParser initialized [2024-11-21 21:01:45,051 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2024-11-21 21:01:46,458 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-21 21:01:46,636 INFO L384 CDTParser]: Found 1 translation units. [2024-11-21 21:01:46,637 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2024-11-21 21:01:46,646 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b14b523b4/9bef437743f04609b0eee0bfea7da652/FLAGa6624601e [2024-11-21 21:01:46,659 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b14b523b4/9bef437743f04609b0eee0bfea7da652 [2024-11-21 21:01:46,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-21 21:01:46,663 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-21 21:01:46,664 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-21 21:01:46,664 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-21 21:01:46,669 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-21 21:01:46,670 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:01:46" (1/1) ... [2024-11-21 21:01:46,671 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d19546f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:46, skipping insertion in model container [2024-11-21 21:01:46,671 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:01:46" (1/1) ... [2024-11-21 21:01:46,689 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-21 21:01:46,869 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c[413,426] [2024-11-21 21:01:46,890 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-21 21:01:46,898 INFO L200 MainTranslator]: Completed pre-run [2024-11-21 21:01:46,910 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c[413,426] [2024-11-21 21:01:46,917 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-21 21:01:46,943 INFO L204 MainTranslator]: Completed translation [2024-11-21 21:01:46,944 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:46 WrapperNode [2024-11-21 21:01:46,944 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-21 21:01:46,945 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-21 21:01:46,945 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-21 21:01:46,945 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-21 21:01:46,951 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:46" (1/1) ... [2024-11-21 21:01:46,957 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:46" (1/1) ... [2024-11-21 21:01:46,990 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 57 [2024-11-21 21:01:46,990 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-21 21:01:46,991 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-21 21:01:46,991 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-21 21:01:46,991 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-21 21:01:47,001 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:46" (1/1) ... [2024-11-21 21:01:47,001 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:46" (1/1) ... [2024-11-21 21:01:47,002 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:46" (1/1) ... [2024-11-21 21:01:47,018 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-21 21:01:47,019 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:46" (1/1) ... [2024-11-21 21:01:47,019 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:46" (1/1) ... [2024-11-21 21:01:47,022 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:46" (1/1) ... [2024-11-21 21:01:47,027 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:46" (1/1) ... [2024-11-21 21:01:47,028 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:46" (1/1) ... [2024-11-21 21:01:47,029 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:46" (1/1) ... [2024-11-21 21:01:47,031 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-21 21:01:47,032 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-21 21:01:47,032 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-21 21:01:47,032 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-21 21:01:47,033 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:46" (1/1) ... [2024-11-21 21:01:47,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-21 21:01:47,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:01:47,070 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-21 21:01:47,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-21 21:01:47,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-21 21:01:47,125 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-21 21:01:47,125 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-21 21:01:47,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-21 21:01:47,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-21 21:01:47,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-21 21:01:47,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-21 21:01:47,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-21 21:01:47,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-21 21:01:47,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-21 21:01:47,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-21 21:01:47,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-21 21:01:47,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-21 21:01:47,200 INFO L238 CfgBuilder]: Building ICFG [2024-11-21 21:01:47,202 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-21 21:01:47,358 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-21 21:01:47,359 INFO L287 CfgBuilder]: Performing block encoding [2024-11-21 21:01:47,372 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-21 21:01:47,372 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-21 21:01:47,373 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:01:47 BoogieIcfgContainer [2024-11-21 21:01:47,374 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-21 21:01:47,377 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-21 21:01:47,377 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-21 21:01:47,385 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-21 21:01:47,388 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:01:46" (1/3) ... [2024-11-21 21:01:47,390 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ecdd63a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:01:47, skipping insertion in model container [2024-11-21 21:01:47,390 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:46" (2/3) ... [2024-11-21 21:01:47,391 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ecdd63a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:01:47, skipping insertion in model container [2024-11-21 21:01:47,391 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:01:47" (3/3) ... [2024-11-21 21:01:47,393 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_nondet_vars.c [2024-11-21 21:01:47,409 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-21 21:01:47,410 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-21 21:01:47,476 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-21 21:01:47,482 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@a7be6b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-21 21:01:47,482 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-21 21:01:47,486 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-21 21:01:47,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-21 21:01:47,493 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:01:47,494 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:01:47,495 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:01:47,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:01:47,502 INFO L85 PathProgramCache]: Analyzing trace with hash -687560493, now seen corresponding path program 1 times [2024-11-21 21:01:47,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:01:47,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038676075] [2024-11-21 21:01:47,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:01:47,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:01:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:01:47,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-21 21:01:47,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:01:47,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038676075] [2024-11-21 21:01:47,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038676075] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:01:47,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899988227] [2024-11-21 21:01:47,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:01:47,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:01:47,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:01:47,670 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:01:47,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-21 21:01:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:01:47,734 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-21 21:01:47,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:01:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-21 21:01:47,749 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-21 21:01:47,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899988227] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:01:47,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-21 21:01:47,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-21 21:01:47,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583579392] [2024-11-21 21:01:47,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:01:47,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-21 21:01:47,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:01:47,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-21 21:01:47,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-21 21:01:47,785 INFO L87 Difference]: Start difference. First operand has 25 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 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 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-21 21:01:47,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:01:47,800 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2024-11-21 21:01:47,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-21 21:01:47,803 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (2), 2 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 19 [2024-11-21 21:01:47,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:01:47,809 INFO L225 Difference]: With dead ends: 47 [2024-11-21 21:01:47,809 INFO L226 Difference]: Without dead ends: 21 [2024-11-21 21:01:47,812 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-21 21:01:47,814 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 21:01:47,815 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:01:47,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-21 21:01:47,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-21 21:01:47,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-21 21:01:47,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-11-21 21:01:47,850 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 19 [2024-11-21 21:01:47,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:01:47,850 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-11-21 21:01:47,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-21 21:01:47,851 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-11-21 21:01:47,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-21 21:01:47,853 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:01:47,853 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:01:47,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-21 21:01:48,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-21 21:01:48,054 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:01:48,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:01:48,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1294753969, now seen corresponding path program 1 times [2024-11-21 21:01:48,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:01:48,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944885787] [2024-11-21 21:01:48,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:01:48,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:01:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:01:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 21:01:48,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:01:48,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944885787] [2024-11-21 21:01:48,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944885787] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:01:48,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 21:01:48,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-21 21:01:48,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169851411] [2024-11-21 21:01:48,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:01:48,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-21 21:01:48,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:01:48,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-21 21:01:48,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-21 21:01:48,249 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2024-11-21 21:01:48,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:01:48,299 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2024-11-21 21:01:48,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-21 21:01:48,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 19 [2024-11-21 21:01:48,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:01:48,302 INFO L225 Difference]: With dead ends: 39 [2024-11-21 21:01:48,303 INFO L226 Difference]: Without dead ends: 31 [2024-11-21 21:01:48,304 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-21 21:01:48,305 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 21:01:48,306 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 49 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:01:48,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-21 21:01:48,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2024-11-21 21:01:48,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-21 21:01:48,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2024-11-21 21:01:48,318 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2024-11-21 21:01:48,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:01:48,318 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2024-11-21 21:01:48,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2024-11-21 21:01:48,320 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2024-11-21 21:01:48,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-21 21:01:48,321 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:01:48,321 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:01:48,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-21 21:01:48,322 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:01:48,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:01:48,324 INFO L85 PathProgramCache]: Analyzing trace with hash -554531054, now seen corresponding path program 1 times [2024-11-21 21:01:48,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:01:48,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385109365] [2024-11-21 21:01:48,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:01:48,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:01:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:01:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-21 21:01:49,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:01:49,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385109365] [2024-11-21 21:01:49,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385109365] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:01:49,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433353725] [2024-11-21 21:01:49,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:01:49,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:01:49,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:01:49,016 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:01:49,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-21 21:01:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:01:49,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-21 21:01:49,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:01:49,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-21 21:01:49,386 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 [2024-11-21 21:01:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-21 21:01:49,406 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:01:49,469 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 [2024-11-21 21:01:49,472 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 [2024-11-21 21:01:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-21 21:01:49,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433353725] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:01:49,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:01:49,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 22 [2024-11-21 21:01:49,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969004690] [2024-11-21 21:01:49,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:01:49,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-21 21:01:49,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:01:49,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-21 21:01:49,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2024-11-21 21:01:49,662 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 22 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-21 21:01:49,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:01:49,910 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2024-11-21 21:01:49,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-21 21:01:49,911 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 27 [2024-11-21 21:01:49,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:01:49,912 INFO L225 Difference]: With dead ends: 47 [2024-11-21 21:01:49,913 INFO L226 Difference]: Without dead ends: 45 [2024-11-21 21:01:49,914 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2024-11-21 21:01:49,915 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-21 21:01:49,917 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 217 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-21 21:01:49,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-21 21:01:49,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 29. [2024-11-21 21:01:49,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 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) [2024-11-21 21:01:49,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2024-11-21 21:01:49,930 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 27 [2024-11-21 21:01:49,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:01:49,930 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2024-11-21 21:01:49,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-21 21:01:49,930 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2024-11-21 21:01:49,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-21 21:01:49,931 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:01:49,931 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:01:49,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-21 21:01:50,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-21 21:01:50,132 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:01:50,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:01:50,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1909003512, now seen corresponding path program 1 times [2024-11-21 21:01:50,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:01:50,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025345625] [2024-11-21 21:01:50,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:01:50,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:01:50,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:01:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-21 21:01:50,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:01:50,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025345625] [2024-11-21 21:01:50,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025345625] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:01:50,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77695049] [2024-11-21 21:01:50,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:01:50,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:01:50,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:01:50,219 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:01:50,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-21 21:01:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:01:50,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-21 21:01:50,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:01:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-21 21:01:50,349 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:01:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-21 21:01:50,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77695049] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:01:50,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:01:50,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-21 21:01:50,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777331602] [2024-11-21 21:01:50,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:01:50,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-21 21:01:50,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:01:50,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-21 21:01:50,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-21 21:01:50,429 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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) [2024-11-21 21:01:50,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:01:50,487 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2024-11-21 21:01:50,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-21 21:01:50,487 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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 31 [2024-11-21 21:01:50,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:01:50,488 INFO L225 Difference]: With dead ends: 53 [2024-11-21 21:01:50,488 INFO L226 Difference]: Without dead ends: 41 [2024-11-21 21:01:50,489 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-21 21:01:50,489 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 21:01:50,490 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 82 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:01:50,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-21 21:01:50,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2024-11-21 21:01:50,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.1) internal successors, (22), 20 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) [2024-11-21 21:01:50,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-11-21 21:01:50,496 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 31 [2024-11-21 21:01:50,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:01:50,498 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-11-21 21:01:50,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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) [2024-11-21 21:01:50,498 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-11-21 21:01:50,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-21 21:01:50,500 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:01:50,500 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:01:50,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-21 21:01:50,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:01:50,705 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:01:50,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:01:50,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1118110763, now seen corresponding path program 2 times [2024-11-21 21:01:50,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:01:50,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114095902] [2024-11-21 21:01:50,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:01:50,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:01:50,741 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:01:50,741 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:01:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-21 21:01:51,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:01:51,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114095902] [2024-11-21 21:01:51,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114095902] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:01:51,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021722249] [2024-11-21 21:01:51,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:01:51,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:01:51,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:01:51,112 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:01:51,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-21 21:01:51,173 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:01:51,173 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:01:51,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-21 21:01:51,177 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:01:51,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-21 21:01:51,638 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 [2024-11-21 21:01:51,791 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 [2024-11-21 21:01:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-21 21:01:51,812 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:02:00,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021722249] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:02:00,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-21 21:02:00,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 26 [2024-11-21 21:02:00,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218559627] [2024-11-21 21:02:00,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-21 21:02:00,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-21 21:02:00,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:02:00,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-21 21:02:00,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=665, Unknown=2, NotChecked=0, Total=812 [2024-11-21 21:02:00,162 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 21 states have internal predecessors, (36), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-21 21:02:04,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-21 21:02:08,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-21 21:02:16,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-21 21:02:16,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:02:16,805 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2024-11-21 21:02:16,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-21 21:02:16,808 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.44) internal successors, (36), 21 states have internal predecessors, (36), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 35 [2024-11-21 21:02:16,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:02:16,809 INFO L225 Difference]: With dead ends: 75 [2024-11-21 21:02:16,809 INFO L226 Difference]: Without dead ends: 73 [2024-11-21 21:02:16,810 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=342, Invalid=1377, Unknown=3, NotChecked=0, Total=1722 [2024-11-21 21:02:16,811 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 203 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 31 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2024-11-21 21:02:16,811 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 195 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 286 Invalid, 3 Unknown, 0 Unchecked, 12.3s Time] [2024-11-21 21:02:16,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-21 21:02:16,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 41. [2024-11-21 21:02:16,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 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) [2024-11-21 21:02:16,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2024-11-21 21:02:16,826 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 35 [2024-11-21 21:02:16,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:02:16,827 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2024-11-21 21:02:16,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.44) internal successors, (36), 21 states have internal predecessors, (36), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-21 21:02:16,827 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2024-11-21 21:02:16,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-21 21:02:16,828 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:02:16,829 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:02:16,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-21 21:02:17,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:02:17,029 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:02:17,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:02:17,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1711359563, now seen corresponding path program 2 times [2024-11-21 21:02:17,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:02:17,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569638133] [2024-11-21 21:02:17,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:02:17,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:02:17,068 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:02:17,068 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:02:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-21 21:02:17,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:02:17,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569638133] [2024-11-21 21:02:17,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569638133] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:02:17,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716452705] [2024-11-21 21:02:17,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:02:17,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:02:17,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:02:17,497 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:02:17,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-21 21:02:17,560 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:02:17,561 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:02:17,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-21 21:02:17,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:02:17,723 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 [2024-11-21 21:02:17,919 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 [2024-11-21 21:02:17,941 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-21 21:02:17,942 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:02:18,099 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 [2024-11-21 21:02:18,103 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 [2024-11-21 21:02:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-21 21:02:18,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716452705] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:02:18,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:02:18,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2024-11-21 21:02:18,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317736513] [2024-11-21 21:02:18,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:02:18,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-21 21:02:18,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:02:18,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-21 21:02:18,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2024-11-21 21:02:18,297 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 27 states have internal predecessors, (56), 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) [2024-11-21 21:02:19,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:02:19,036 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2024-11-21 21:02:19,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-21 21:02:19,036 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 27 states have internal predecessors, (56), 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 39 [2024-11-21 21:02:19,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:02:19,040 INFO L225 Difference]: With dead ends: 74 [2024-11-21 21:02:19,042 INFO L226 Difference]: Without dead ends: 72 [2024-11-21 21:02:19,043 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=449, Invalid=1713, Unknown=0, NotChecked=0, Total=2162 [2024-11-21 21:02:19,044 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 142 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-21 21:02:19,046 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 274 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-21 21:02:19,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-21 21:02:19,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2024-11-21 21:02:19,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 45 states have internal predecessors, (48), 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) [2024-11-21 21:02:19,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2024-11-21 21:02:19,056 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 39 [2024-11-21 21:02:19,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:02:19,058 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2024-11-21 21:02:19,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 27 states have internal predecessors, (56), 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) [2024-11-21 21:02:19,059 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2024-11-21 21:02:19,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-21 21:02:19,060 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:02:19,060 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:02:19,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-21 21:02:19,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:02:19,261 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:02:19,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:02:19,261 INFO L85 PathProgramCache]: Analyzing trace with hash -181817714, now seen corresponding path program 3 times [2024-11-21 21:02:19,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:02:19,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659693811] [2024-11-21 21:02:19,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:02:19,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:02:19,282 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-21 21:02:19,283 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:02:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-21 21:02:19,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:02:19,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659693811] [2024-11-21 21:02:19,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659693811] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:02:19,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931160366] [2024-11-21 21:02:19,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:02:19,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:02:19,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:02:19,748 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:02:19,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-21 21:02:19,814 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-21 21:02:19,814 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:02:19,816 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-21 21:02:19,819 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:02:19,911 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 [2024-11-21 21:02:20,104 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-21 21:02:20,105 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 [2024-11-21 21:02:20,217 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 [2024-11-21 21:02:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-21 21:02:20,237 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:02:40,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931160366] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:02:40,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-21 21:02:40,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2024-11-21 21:02:40,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534971657] [2024-11-21 21:02:40,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-21 21:02:40,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-21 21:02:40,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:02:40,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-21 21:02:40,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=500, Unknown=4, NotChecked=0, Total=600 [2024-11-21 21:02:40,481 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 20 states have internal predecessors, (44), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-21 21:02:44,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-21 21:02:44,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:02:44,819 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2024-11-21 21:02:44,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-21 21:02:44,821 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 20 states have internal predecessors, (44), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2024-11-21 21:02:44,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:02:44,822 INFO L225 Difference]: With dead ends: 78 [2024-11-21 21:02:44,822 INFO L226 Difference]: Without dead ends: 76 [2024-11-21 21:02:44,822 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=164, Invalid=824, Unknown=4, NotChecked=0, Total=992 [2024-11-21 21:02:44,823 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-21 21:02:44,823 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 220 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 327 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2024-11-21 21:02:44,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-21 21:02:44,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 53. [2024-11-21 21:02:44,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-21 21:02:44,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2024-11-21 21:02:44,840 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 47 [2024-11-21 21:02:44,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:02:44,842 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2024-11-21 21:02:44,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 20 states have internal predecessors, (44), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-21 21:02:44,842 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2024-11-21 21:02:44,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-21 21:02:44,843 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:02:44,844 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:02:44,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-21 21:02:45,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:02:45,045 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:02:45,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:02:45,045 INFO L85 PathProgramCache]: Analyzing trace with hash -581569404, now seen corresponding path program 4 times [2024-11-21 21:02:45,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:02:45,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367444516] [2024-11-21 21:02:45,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 21:02:45,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:02:45,070 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 21:02:45,072 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:02:45,570 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-21 21:02:45,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:02:45,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367444516] [2024-11-21 21:02:45,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367444516] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:02:45,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166756785] [2024-11-21 21:02:45,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 21:02:45,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:02:45,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:02:45,574 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:02:45,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-21 21:02:45,633 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 21:02:45,633 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:02:45,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-21 21:02:45,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:02:45,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-21 21:02:46,117 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 [2024-11-21 21:02:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-21 21:02:46,144 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:02:46,288 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 [2024-11-21 21:02:46,294 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 [2024-11-21 21:02:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-21 21:02:46,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166756785] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:02:46,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:02:46,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 14] total 37 [2024-11-21 21:02:46,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454997523] [2024-11-21 21:02:46,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:02:46,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-21 21:02:46,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:02:46,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-21 21:02:46,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2024-11-21 21:02:46,540 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 37 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 32 states have internal predecessors, (78), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2024-11-21 21:02:47,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:02:47,658 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2024-11-21 21:02:47,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-21 21:02:47,658 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 32 states have internal predecessors, (78), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) Word has length 51 [2024-11-21 21:02:47,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:02:47,659 INFO L225 Difference]: With dead ends: 98 [2024-11-21 21:02:47,659 INFO L226 Difference]: Without dead ends: 59 [2024-11-21 21:02:47,660 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=545, Invalid=2877, Unknown=0, NotChecked=0, Total=3422 [2024-11-21 21:02:47,660 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 135 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-21 21:02:47,661 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 413 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-21 21:02:47,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-21 21:02:47,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2024-11-21 21:02:47,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-21 21:02:47,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2024-11-21 21:02:47,673 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 51 [2024-11-21 21:02:47,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:02:47,673 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2024-11-21 21:02:47,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 32 states have internal predecessors, (78), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2024-11-21 21:02:47,673 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2024-11-21 21:02:47,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-21 21:02:47,674 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:02:47,674 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:02:47,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-21 21:02:47,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:02:47,878 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:02:47,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:02:47,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1754460089, now seen corresponding path program 5 times [2024-11-21 21:02:47,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:02:47,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031439482] [2024-11-21 21:02:47,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 21:02:47,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:02:47,907 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-21 21:02:47,907 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:02:48,421 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-21 21:02:48,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:02:48,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031439482] [2024-11-21 21:02:48,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031439482] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:02:48,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169044327] [2024-11-21 21:02:48,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 21:02:48,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:02:48,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:02:48,425 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:02:48,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-21 21:02:48,488 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-21 21:02:48,488 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:02:48,490 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-21 21:02:48,494 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:02:48,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-21 21:02:48,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:02:48,926 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 [2024-11-21 21:02:49,124 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 [2024-11-21 21:02:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-21 21:02:49,151 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:03:05,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169044327] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:03:05,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-21 21:03:05,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 32 [2024-11-21 21:03:05,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47402958] [2024-11-21 21:03:05,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-21 21:03:05,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-21 21:03:05,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:03:05,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-21 21:03:05,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=964, Unknown=4, NotChecked=0, Total=1122 [2024-11-21 21:03:05,495 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 28 states have internal predecessors, (64), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-21 21:03:09,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-21 21:03:13,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-21 21:03:13,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:03:13,895 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2024-11-21 21:03:13,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-21 21:03:13,895 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 28 states have internal predecessors, (64), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 59 [2024-11-21 21:03:13,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:03:13,896 INFO L225 Difference]: With dead ends: 66 [2024-11-21 21:03:13,896 INFO L226 Difference]: Without dead ends: 64 [2024-11-21 21:03:13,897 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=272, Invalid=1530, Unknown=4, NotChecked=0, Total=1806 [2024-11-21 21:03:13,897 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 115 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2024-11-21 21:03:13,898 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 232 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 407 Invalid, 2 Unknown, 0 Unchecked, 8.2s Time] [2024-11-21 21:03:13,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-21 21:03:13,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2024-11-21 21:03:13,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 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) [2024-11-21 21:03:13,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2024-11-21 21:03:13,912 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 59 [2024-11-21 21:03:13,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:03:13,913 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2024-11-21 21:03:13,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 28 states have internal predecessors, (64), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-21 21:03:13,913 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2024-11-21 21:03:13,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-21 21:03:13,914 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:03:13,914 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:03:13,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-21 21:03:14,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-21 21:03:14,115 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:03:14,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:03:14,115 INFO L85 PathProgramCache]: Analyzing trace with hash 120574397, now seen corresponding path program 6 times [2024-11-21 21:03:14,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:03:14,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699181431] [2024-11-21 21:03:14,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-21 21:03:14,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:03:14,142 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-21 21:03:14,143 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:03:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 19 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-21 21:03:14,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:03:14,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699181431] [2024-11-21 21:03:14,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699181431] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:03:14,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038075366] [2024-11-21 21:03:14,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-21 21:03:14,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:03:14,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:03:14,688 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:03:14,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-21 21:03:14,757 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-21 21:03:14,757 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:03:14,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-21 21:03:14,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:03:15,052 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 [2024-11-21 21:03:15,309 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 [2024-11-21 21:03:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 9 proven. 64 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-21 21:03:15,331 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:03:15,543 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 [2024-11-21 21:03:15,545 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 [2024-11-21 21:03:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-21 21:03:15,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038075366] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:03:15,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:03:15,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 18] total 46 [2024-11-21 21:03:15,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559382646] [2024-11-21 21:03:15,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:03:15,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-21 21:03:15,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:03:15,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-21 21:03:15,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=1761, Unknown=0, NotChecked=0, Total=2070 [2024-11-21 21:03:15,911 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 40 states have internal predecessors, (98), 14 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (17), 17 states have call predecessors, (17), 14 states have call successors, (17) [2024-11-21 21:03:16,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:03:16,654 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2024-11-21 21:03:16,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-21 21:03:16,655 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 40 states have internal predecessors, (98), 14 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (17), 17 states have call predecessors, (17), 14 states have call successors, (17) Word has length 63 [2024-11-21 21:03:16,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:03:16,656 INFO L225 Difference]: With dead ends: 95 [2024-11-21 21:03:16,656 INFO L226 Difference]: Without dead ends: 71 [2024-11-21 21:03:16,657 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=630, Invalid=2910, Unknown=0, NotChecked=0, Total=3540 [2024-11-21 21:03:16,657 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 164 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-21 21:03:16,658 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 329 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-21 21:03:16,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-21 21:03:16,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2024-11-21 21:03:16,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 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) [2024-11-21 21:03:16,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2024-11-21 21:03:16,667 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 63 [2024-11-21 21:03:16,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:03:16,668 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2024-11-21 21:03:16,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 40 states have internal predecessors, (98), 14 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (17), 17 states have call predecessors, (17), 14 states have call successors, (17) [2024-11-21 21:03:16,668 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2024-11-21 21:03:16,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-21 21:03:16,669 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:03:16,669 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:03:16,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-21 21:03:16,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-21 21:03:16,874 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:03:16,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:03:16,874 INFO L85 PathProgramCache]: Analyzing trace with hash -700161792, now seen corresponding path program 7 times [2024-11-21 21:03:16,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:03:16,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530982141] [2024-11-21 21:03:16,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-21 21:03:16,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:03:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:03:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 78 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-21 21:03:17,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:03:17,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530982141] [2024-11-21 21:03:17,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530982141] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:03:17,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9696246] [2024-11-21 21:03:17,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-21 21:03:17,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:03:17,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:03:17,441 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:03:17,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-21 21:03:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:03:17,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-21 21:03:17,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:03:17,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-21 21:03:17,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:03:17,955 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 [2024-11-21 21:03:18,271 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 [2024-11-21 21:03:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 33 proven. 78 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-21 21:03:18,316 INFO L311 TraceCheckSpWp]: Computing backward predicates...