/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-tiling/pnr2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 17:07:24,665 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 17:07:24,723 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 17:07:24,727 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 17:07:24,728 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 17:07:24,753 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 17:07:24,754 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 17:07:24,754 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 17:07:24,754 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 17:07:24,757 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 17:07:24,757 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 17:07:24,758 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 17:07:24,758 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 17:07:24,759 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 17:07:24,759 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 17:07:24,759 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 17:07:24,760 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 17:07:24,764 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 17:07:24,764 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 17:07:24,765 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 17:07:24,765 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 17:07:24,765 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 17:07:24,766 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 17:07:24,766 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 17:07:24,766 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 17:07:24,766 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 17:07:24,766 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 17:07:24,766 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 17:07:24,767 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 17:07:24,767 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 17:07:24,767 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 17:07:24,768 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 17:07:24,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 17:07:24,768 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 17:07:24,768 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 17:07:24,768 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 17:07:24,768 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 17:07:24,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 17:07:24,768 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 17:07:24,768 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 17:07:24,769 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 17:07:24,772 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 17:07:24,772 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 17:07:24,772 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 17:07:24,963 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 17:07:24,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 17:07:24,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 17:07:24,982 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 17:07:24,982 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 17:07:24,983 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/pnr2.c [2023-12-15 17:07:25,887 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 17:07:26,051 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 17:07:26,051 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pnr2.c [2023-12-15 17:07:26,056 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b4a891b1/ec39aa326f964d689514812db0e5c7f2/FLAG78fda51ee [2023-12-15 17:07:26,064 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b4a891b1/ec39aa326f964d689514812db0e5c7f2 [2023-12-15 17:07:26,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 17:07:26,067 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 17:07:26,068 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 17:07:26,068 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 17:07:26,071 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 17:07:26,071 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 05:07:26" (1/1) ... [2023-12-15 17:07:26,072 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eee8ae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:07:26, skipping insertion in model container [2023-12-15 17:07:26,072 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 05:07:26" (1/1) ... [2023-12-15 17:07:26,085 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 17:07:26,173 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pnr2.c[395,408] [2023-12-15 17:07:26,186 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 17:07:26,192 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 17:07:26,200 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pnr2.c[395,408] [2023-12-15 17:07:26,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 17:07:26,217 INFO L206 MainTranslator]: Completed translation [2023-12-15 17:07:26,217 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:07:26 WrapperNode [2023-12-15 17:07:26,217 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 17:07:26,218 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 17:07:26,218 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 17:07:26,218 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 17:07:26,227 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:07:26" (1/1) ... [2023-12-15 17:07:26,232 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:07:26" (1/1) ... [2023-12-15 17:07:26,244 INFO L138 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2023-12-15 17:07:26,245 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 17:07:26,245 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 17:07:26,245 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 17:07:26,245 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 17:07:26,252 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:07:26" (1/1) ... [2023-12-15 17:07:26,253 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:07:26" (1/1) ... [2023-12-15 17:07:26,254 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:07:26" (1/1) ... [2023-12-15 17:07:26,273 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 7, 5]. 50 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0]. The 4 writes are split as follows [0, 0, 4]. [2023-12-15 17:07:26,273 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:07:26" (1/1) ... [2023-12-15 17:07:26,273 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:07:26" (1/1) ... [2023-12-15 17:07:26,277 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:07:26" (1/1) ... [2023-12-15 17:07:26,281 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:07:26" (1/1) ... [2023-12-15 17:07:26,282 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:07:26" (1/1) ... [2023-12-15 17:07:26,282 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:07:26" (1/1) ... [2023-12-15 17:07:26,284 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 17:07:26,284 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 17:07:26,284 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 17:07:26,284 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 17:07:26,285 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:07:26" (1/1) ... [2023-12-15 17:07:26,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 17:07:26,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:07:26,313 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) [2023-12-15 17:07:26,329 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 [2023-12-15 17:07:26,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 17:07:26,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 17:07:26,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-15 17:07:26,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-15 17:07:26,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-15 17:07:26,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-15 17:07:26,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-15 17:07:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-15 17:07:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2023-12-15 17:07:26,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2023-12-15 17:07:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 17:07:26,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 17:07:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-15 17:07:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-15 17:07:26,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-15 17:07:26,390 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 17:07:26,391 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 17:07:26,570 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 17:07:26,591 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 17:07:26,592 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-15 17:07:26,592 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 05:07:26 BoogieIcfgContainer [2023-12-15 17:07:26,592 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 17:07:26,593 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 17:07:26,593 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 17:07:26,596 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 17:07:26,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 05:07:26" (1/3) ... [2023-12-15 17:07:26,597 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396d6ef6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 05:07:26, skipping insertion in model container [2023-12-15 17:07:26,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:07:26" (2/3) ... [2023-12-15 17:07:26,597 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396d6ef6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 05:07:26, skipping insertion in model container [2023-12-15 17:07:26,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 05:07:26" (3/3) ... [2023-12-15 17:07:26,598 INFO L112 eAbstractionObserver]: Analyzing ICFG pnr2.c [2023-12-15 17:07:26,610 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 17:07:26,610 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 17:07:26,638 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 17:07:26,643 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4f7d8546, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 17:07:26,643 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 17:07:26,645 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-15 17:07:26,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-15 17:07:26,650 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:07:26,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:07:26,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:07:26,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:07:26,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1122066344, now seen corresponding path program 1 times [2023-12-15 17:07:26,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:07:26,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629907537] [2023-12-15 17:07:26,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:07:26,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:07:26,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:27,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:07:27,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:07:27,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629907537] [2023-12-15 17:07:27,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629907537] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 17:07:27,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 17:07:27,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-15 17:07:27,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234216120] [2023-12-15 17:07:27,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 17:07:27,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-15 17:07:27,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:07:27,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-15 17:07:27,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-15 17:07:27,158 INFO L87 Difference]: Start difference. First operand has 25 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:07:27,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:07:27,259 INFO L93 Difference]: Finished difference Result 59 states and 80 transitions. [2023-12-15 17:07:27,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-15 17:07:27,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-15 17:07:27,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:07:27,265 INFO L225 Difference]: With dead ends: 59 [2023-12-15 17:07:27,266 INFO L226 Difference]: Without dead ends: 29 [2023-12-15 17:07:27,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-15 17:07:27,273 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 61 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:07:27,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 23 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:07:27,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-15 17:07:27,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2023-12-15 17:07:27,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-15 17:07:27,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-12-15 17:07:27,302 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 10 [2023-12-15 17:07:27,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:07:27,303 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-12-15 17:07:27,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:07:27,303 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-12-15 17:07:27,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-15 17:07:27,304 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:07:27,304 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:07:27,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-15 17:07:27,304 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:07:27,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:07:27,305 INFO L85 PathProgramCache]: Analyzing trace with hash -724256741, now seen corresponding path program 1 times [2023-12-15 17:07:27,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:07:27,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091156198] [2023-12-15 17:07:27,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:07:27,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:07:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:27,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-15 17:07:27,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:27,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-15 17:07:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 17:07:27,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:07:27,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091156198] [2023-12-15 17:07:27,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091156198] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:07:27,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512053833] [2023-12-15 17:07:27,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:07:27,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:07:27,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:07:27,702 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 17:07:27,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 17:07:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:27,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-15 17:07:27,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:07:27,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-15 17:07:27,890 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 24 treesize of output 12 [2023-12-15 17:07:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 17:07:27,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:07:28,008 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 15 treesize of output 13 [2023-12-15 17:07:28,011 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 14 treesize of output 12 [2023-12-15 17:07:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 17:07:28,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512053833] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:07:28,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:07:28,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2023-12-15 17:07:28,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288904740] [2023-12-15 17:07:28,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:07:28,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-15 17:07:28,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:07:28,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-15 17:07:28,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-12-15 17:07:28,045 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-15 17:07:28,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:07:28,235 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2023-12-15 17:07:28,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-15 17:07:28,236 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 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) Word has length 22 [2023-12-15 17:07:28,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:07:28,238 INFO L225 Difference]: With dead ends: 59 [2023-12-15 17:07:28,238 INFO L226 Difference]: Without dead ends: 57 [2023-12-15 17:07:28,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-12-15 17:07:28,241 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:07:28,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 127 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:07:28,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-12-15 17:07:28,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 33. [2023-12-15 17:07:28,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-15 17:07:28,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2023-12-15 17:07:28,260 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 22 [2023-12-15 17:07:28,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:07:28,260 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2023-12-15 17:07:28,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-15 17:07:28,261 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2023-12-15 17:07:28,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-15 17:07:28,262 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:07:28,262 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:07:28,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-15 17:07:28,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:07:28,468 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:07:28,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:07:28,469 INFO L85 PathProgramCache]: Analyzing trace with hash -466091303, now seen corresponding path program 1 times [2023-12-15 17:07:28,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:07:28,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789874881] [2023-12-15 17:07:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:07:28,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:07:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:28,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-15 17:07:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:28,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-15 17:07:28,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 17:07:28,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:07:28,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789874881] [2023-12-15 17:07:28,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789874881] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:07:28,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560387804] [2023-12-15 17:07:28,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:07:28,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:07:28,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:07:28,673 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 17:07:28,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 17:07:28,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:28,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-15 17:07:28,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:07:28,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-15 17:07:28,951 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 23 treesize of output 11 [2023-12-15 17:07:29,018 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 15 treesize of output 7 [2023-12-15 17:07:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:07:29,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:07:29,118 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 15 treesize of output 13 [2023-12-15 17:07:29,121 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 18 treesize of output 16 [2023-12-15 17:07:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 17:07:29,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560387804] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:07:29,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:07:29,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 23 [2023-12-15 17:07:29,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833108327] [2023-12-15 17:07:29,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:07:29,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-15 17:07:29,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:07:29,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-15 17:07:29,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-12-15 17:07:29,209 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-15 17:07:29,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:07:29,657 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2023-12-15 17:07:29,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-15 17:07:29,658 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 22 [2023-12-15 17:07:29,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:07:29,659 INFO L225 Difference]: With dead ends: 75 [2023-12-15 17:07:29,659 INFO L226 Difference]: Without dead ends: 73 [2023-12-15 17:07:29,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=1235, Unknown=0, NotChecked=0, Total=1640 [2023-12-15 17:07:29,661 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 154 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 17:07:29,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 122 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 17:07:29,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-12-15 17:07:29,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 24. [2023-12-15 17:07:29,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-15 17:07:29,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-12-15 17:07:29,667 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 22 [2023-12-15 17:07:29,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:07:29,667 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-12-15 17:07:29,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-15 17:07:29,667 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-12-15 17:07:29,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-15 17:07:29,667 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:07:29,668 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:07:29,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-15 17:07:29,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-12-15 17:07:29,872 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:07:29,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:07:29,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1588571850, now seen corresponding path program 1 times [2023-12-15 17:07:29,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:07:29,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079066689] [2023-12-15 17:07:29,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:07:29,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:07:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:30,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-15 17:07:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:30,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-15 17:07:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 17:07:30,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:07:30,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079066689] [2023-12-15 17:07:30,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079066689] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:07:30,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395647148] [2023-12-15 17:07:30,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:07:30,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:07:30,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:07:30,044 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 17:07:30,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 17:07:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:30,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-15 17:07:30,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:07:30,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-15 17:07:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 17:07:30,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:07:30,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-15 17:07:30,179 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 16 treesize of output 12 [2023-12-15 17:07:30,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 17:07:30,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395647148] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:07:30,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:07:30,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2023-12-15 17:07:30,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250814043] [2023-12-15 17:07:30,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:07:30,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-15 17:07:30,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:07:30,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-15 17:07:30,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-12-15 17:07:30,198 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-15 17:07:30,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:07:30,328 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2023-12-15 17:07:30,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-15 17:07:30,328 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-12-15 17:07:30,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:07:30,330 INFO L225 Difference]: With dead ends: 54 [2023-12-15 17:07:30,330 INFO L226 Difference]: Without dead ends: 52 [2023-12-15 17:07:30,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2023-12-15 17:07:30,332 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 41 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:07:30,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 123 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:07:30,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-12-15 17:07:30,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2023-12-15 17:07:30,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-15 17:07:30,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2023-12-15 17:07:30,350 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 25 [2023-12-15 17:07:30,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:07:30,350 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2023-12-15 17:07:30,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-15 17:07:30,350 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2023-12-15 17:07:30,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-15 17:07:30,351 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:07:30,351 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:07:30,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-15 17:07:30,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:07:30,558 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:07:30,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:07:30,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1195544840, now seen corresponding path program 1 times [2023-12-15 17:07:30,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:07:30,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121628146] [2023-12-15 17:07:30,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:07:30,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:07:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:30,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-15 17:07:30,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:30,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-15 17:07:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 17:07:30,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:07:30,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121628146] [2023-12-15 17:07:30,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121628146] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:07:30,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410089726] [2023-12-15 17:07:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:07:30,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:07:30,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:07:30,753 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 17:07:30,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-15 17:07:30,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:30,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-15 17:07:30,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:07:30,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-15 17:07:30,980 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 15 treesize of output 7 [2023-12-15 17:07:31,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 17:07:31,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:07:31,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-15 17:07:31,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-15 17:07:31,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 17:07:31,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410089726] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:07:31,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:07:31,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2023-12-15 17:07:31,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131863520] [2023-12-15 17:07:31,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:07:31,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-15 17:07:31,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:07:31,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-15 17:07:31,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2023-12-15 17:07:31,158 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-15 17:07:31,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:07:31,578 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2023-12-15 17:07:31,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-15 17:07:31,579 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 25 [2023-12-15 17:07:31,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:07:31,579 INFO L225 Difference]: With dead ends: 72 [2023-12-15 17:07:31,579 INFO L226 Difference]: Without dead ends: 70 [2023-12-15 17:07:31,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2023-12-15 17:07:31,581 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 105 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 17:07:31,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 201 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 17:07:31,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-12-15 17:07:31,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 27. [2023-12-15 17:07:31,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-15 17:07:31,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-12-15 17:07:31,587 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 25 [2023-12-15 17:07:31,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:07:31,587 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-12-15 17:07:31,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-15 17:07:31,588 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-12-15 17:07:31,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-15 17:07:31,588 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:07:31,588 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:07:31,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-15 17:07:31,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:07:31,789 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:07:31,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:07:31,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1095203397, now seen corresponding path program 2 times [2023-12-15 17:07:31,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:07:31,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561830985] [2023-12-15 17:07:31,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:07:31,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:07:31,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:31,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-15 17:07:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:31,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-15 17:07:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 17:07:31,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:07:31,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561830985] [2023-12-15 17:07:31,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561830985] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:07:31,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265983985] [2023-12-15 17:07:31,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 17:07:31,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:07:31,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:07:31,969 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 17:07:31,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-15 17:07:32,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 17:07:32,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:07:32,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-15 17:07:32,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:07:32,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 17:07:32,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:07:32,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 17:07:32,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265983985] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:07:32,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:07:32,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-12-15 17:07:32,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124317633] [2023-12-15 17:07:32,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:07:32,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-15 17:07:32,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:07:32,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-15 17:07:32,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2023-12-15 17:07:32,292 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-15 17:07:32,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:07:32,452 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2023-12-15 17:07:32,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-15 17:07:32,453 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 28 [2023-12-15 17:07:32,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:07:32,453 INFO L225 Difference]: With dead ends: 56 [2023-12-15 17:07:32,453 INFO L226 Difference]: Without dead ends: 43 [2023-12-15 17:07:32,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2023-12-15 17:07:32,454 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:07:32,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 76 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:07:32,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-12-15 17:07:32,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2023-12-15 17:07:32,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-15 17:07:32,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2023-12-15 17:07:32,460 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 28 [2023-12-15 17:07:32,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:07:32,460 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2023-12-15 17:07:32,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-15 17:07:32,460 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2023-12-15 17:07:32,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-15 17:07:32,461 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:07:32,461 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:07:32,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-15 17:07:32,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:07:32,667 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:07:32,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:07:32,668 INFO L85 PathProgramCache]: Analyzing trace with hash -821049490, now seen corresponding path program 3 times [2023-12-15 17:07:32,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:07:32,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936136130] [2023-12-15 17:07:32,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:07:32,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:07:32,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:32,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-15 17:07:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:32,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-15 17:07:32,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:32,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-15 17:07:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:32,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-15 17:07:32,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:32,876 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-15 17:07:32,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:07:32,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936136130] [2023-12-15 17:07:32,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936136130] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:07:32,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863047512] [2023-12-15 17:07:32,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 17:07:32,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:07:32,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:07:32,878 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 17:07:32,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-15 17:07:32,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-15 17:07:32,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:07:32,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-15 17:07:32,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:07:33,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-15 17:07:33,028 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 24 treesize of output 12 [2023-12-15 17:07:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-15 17:07:33,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:07:33,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-15 17:07:33,134 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 16 treesize of output 12 [2023-12-15 17:07:33,149 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-15 17:07:33,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863047512] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:07:33,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:07:33,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 19 [2023-12-15 17:07:33,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217096400] [2023-12-15 17:07:33,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:07:33,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-15 17:07:33,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:07:33,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-15 17:07:33,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-12-15 17:07:33,150 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 7 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-15 17:07:33,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:07:33,426 INFO L93 Difference]: Finished difference Result 92 states and 121 transitions. [2023-12-15 17:07:33,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-15 17:07:33,426 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 7 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 40 [2023-12-15 17:07:33,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:07:33,427 INFO L225 Difference]: With dead ends: 92 [2023-12-15 17:07:33,427 INFO L226 Difference]: Without dead ends: 90 [2023-12-15 17:07:33,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2023-12-15 17:07:33,428 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 70 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 17:07:33,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 241 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 17:07:33,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-12-15 17:07:33,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 47. [2023-12-15 17:07:33,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 39 states have internal predecessors, (48), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-15 17:07:33,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2023-12-15 17:07:33,435 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 40 [2023-12-15 17:07:33,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:07:33,436 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2023-12-15 17:07:33,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 7 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-15 17:07:33,436 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2023-12-15 17:07:33,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-15 17:07:33,436 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:07:33,436 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:07:33,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-15 17:07:33,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:07:33,646 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:07:33,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:07:33,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1479773100, now seen corresponding path program 1 times [2023-12-15 17:07:33,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:07:33,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514386987] [2023-12-15 17:07:33,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:07:33,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:07:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:33,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-15 17:07:33,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:33,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-15 17:07:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:33,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-15 17:07:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:33,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-15 17:07:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-15 17:07:33,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:07:33,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514386987] [2023-12-15 17:07:33,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514386987] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:07:33,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659664352] [2023-12-15 17:07:33,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:07:33,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:07:33,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:07:33,842 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 17:07:33,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-15 17:07:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:33,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-15 17:07:33,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:07:34,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-15 17:07:34,086 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 23 treesize of output 11 [2023-12-15 17:07:34,175 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 15 treesize of output 7 [2023-12-15 17:07:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 17:07:34,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:07:34,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-15 17:07:34,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-15 17:07:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-15 17:07:34,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659664352] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:07:34,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:07:34,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 31 [2023-12-15 17:07:34,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341127104] [2023-12-15 17:07:34,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:07:34,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-15 17:07:34,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:07:34,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-15 17:07:34,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2023-12-15 17:07:34,422 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2023-12-15 17:07:39,188 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] [2023-12-15 17:07:43,222 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] [2023-12-15 17:07:45,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:07:45,278 INFO L93 Difference]: Finished difference Result 137 states and 183 transitions. [2023-12-15 17:07:45,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-15 17:07:45,279 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 40 [2023-12-15 17:07:45,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:07:45,280 INFO L225 Difference]: With dead ends: 137 [2023-12-15 17:07:45,280 INFO L226 Difference]: Without dead ends: 135 [2023-12-15 17:07:45,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=672, Invalid=2988, Unknown=0, NotChecked=0, Total=3660 [2023-12-15 17:07:45,281 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 355 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 145 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2023-12-15 17:07:45,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 231 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 609 Invalid, 6 Unknown, 0 Unchecked, 10.3s Time] [2023-12-15 17:07:45,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-12-15 17:07:45,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 49. [2023-12-15 17:07:45,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 40 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) [2023-12-15 17:07:45,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2023-12-15 17:07:45,292 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 40 [2023-12-15 17:07:45,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:07:45,292 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2023-12-15 17:07:45,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2023-12-15 17:07:45,292 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2023-12-15 17:07:45,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-15 17:07:45,292 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:07:45,293 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:07:45,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-15 17:07:45,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:07:45,499 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:07:45,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:07:45,500 INFO L85 PathProgramCache]: Analyzing trace with hash -41157993, now seen corresponding path program 4 times [2023-12-15 17:07:45,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:07:45,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750027522] [2023-12-15 17:07:45,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:07:45,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:07:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:45,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-15 17:07:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:45,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-15 17:07:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:45,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-15 17:07:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:45,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-15 17:07:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-15 17:07:45,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:07:45,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750027522] [2023-12-15 17:07:45,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750027522] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:07:45,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241711330] [2023-12-15 17:07:45,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 17:07:45,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:07:45,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:07:45,721 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 17:07:45,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-15 17:07:45,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 17:07:45,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:07:45,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-15 17:07:45,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:07:45,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-15 17:07:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-15 17:07:45,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:07:45,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-15 17:07:45,962 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 16 treesize of output 12 [2023-12-15 17:07:45,992 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-15 17:07:45,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241711330] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:07:45,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:07:45,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2023-12-15 17:07:45,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089658581] [2023-12-15 17:07:45,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:07:45,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-15 17:07:45,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:07:45,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-15 17:07:45,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2023-12-15 17:07:45,996 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-15 17:07:46,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:07:46,528 INFO L93 Difference]: Finished difference Result 153 states and 211 transitions. [2023-12-15 17:07:46,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-15 17:07:46,528 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 43 [2023-12-15 17:07:46,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:07:46,529 INFO L225 Difference]: With dead ends: 153 [2023-12-15 17:07:46,529 INFO L226 Difference]: Without dead ends: 151 [2023-12-15 17:07:46,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=1173, Unknown=0, NotChecked=0, Total=1406 [2023-12-15 17:07:46,530 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 66 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 17:07:46,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 362 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 17:07:46,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-12-15 17:07:46,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 93. [2023-12-15 17:07:46,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 73 states have internal predecessors, (97), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-15 17:07:46,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 131 transitions. [2023-12-15 17:07:46,547 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 131 transitions. Word has length 43 [2023-12-15 17:07:46,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:07:46,547 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 131 transitions. [2023-12-15 17:07:46,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-15 17:07:46,547 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 131 transitions. [2023-12-15 17:07:46,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-15 17:07:46,548 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:07:46,548 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:07:46,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-15 17:07:46,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-12-15 17:07:46,752 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:07:46,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:07:46,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1062226347, now seen corresponding path program 1 times [2023-12-15 17:07:46,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:07:46,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451683699] [2023-12-15 17:07:46,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:07:46,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:07:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:46,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-15 17:07:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:47,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-15 17:07:47,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:47,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-15 17:07:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:47,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-15 17:07:47,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-15 17:07:47,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:07:47,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451683699] [2023-12-15 17:07:47,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451683699] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:07:47,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634184520] [2023-12-15 17:07:47,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:07:47,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:07:47,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:07:47,009 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 17:07:47,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-15 17:07:47,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:47,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-15 17:07:47,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:07:47,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-15 17:07:47,365 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 15 treesize of output 7 [2023-12-15 17:07:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-15 17:07:47,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:07:47,469 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 17 treesize of output 15 [2023-12-15 17:07:47,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-15 17:07:47,599 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-15 17:07:47,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634184520] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:07:47,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:07:47,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2023-12-15 17:07:47,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983081418] [2023-12-15 17:07:47,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:07:47,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-15 17:07:47,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:07:47,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-15 17:07:47,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2023-12-15 17:07:47,601 INFO L87 Difference]: Start difference. First operand 93 states and 131 transitions. Second operand has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-12-15 17:07:49,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:07:49,094 INFO L93 Difference]: Finished difference Result 279 states and 402 transitions. [2023-12-15 17:07:49,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-15 17:07:49,094 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 43 [2023-12-15 17:07:49,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:07:49,095 INFO L225 Difference]: With dead ends: 279 [2023-12-15 17:07:49,095 INFO L226 Difference]: Without dead ends: 277 [2023-12-15 17:07:49,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=843, Invalid=4269, Unknown=0, NotChecked=0, Total=5112 [2023-12-15 17:07:49,097 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 170 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1752 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-15 17:07:49,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 657 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1752 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-15 17:07:49,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2023-12-15 17:07:49,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 52. [2023-12-15 17:07:49,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 43 states have internal predecessors, (51), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-15 17:07:49,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2023-12-15 17:07:49,111 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 43 [2023-12-15 17:07:49,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:07:49,112 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2023-12-15 17:07:49,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-12-15 17:07:49,112 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2023-12-15 17:07:49,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-15 17:07:49,112 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:07:49,112 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:07:49,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-15 17:07:49,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-15 17:07:49,317 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:07:49,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:07:49,317 INFO L85 PathProgramCache]: Analyzing trace with hash -2066642226, now seen corresponding path program 5 times [2023-12-15 17:07:49,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:07:49,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899156328] [2023-12-15 17:07:49,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:07:49,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:07:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:49,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-15 17:07:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:49,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-15 17:07:49,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:49,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-15 17:07:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:49,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-15 17:07:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-15 17:07:49,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:07:49,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899156328] [2023-12-15 17:07:49,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899156328] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:07:49,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212235556] [2023-12-15 17:07:49,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 17:07:49,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:07:49,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:07:49,573 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 17:07:49,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-15 17:07:49,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-15 17:07:49,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:07:49,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-15 17:07:49,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:07:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-15 17:07:49,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:07:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-15 17:07:50,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212235556] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:07:50,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:07:50,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 34 [2023-12-15 17:07:50,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533292665] [2023-12-15 17:07:50,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:07:50,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-15 17:07:50,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:07:50,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-15 17:07:50,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2023-12-15 17:07:50,125 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 34 states, 34 states have (on average 2.8823529411764706) internal successors, (98), 34 states have internal predecessors, (98), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-12-15 17:07:50,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:07:50,377 INFO L93 Difference]: Finished difference Result 97 states and 125 transitions. [2023-12-15 17:07:50,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-15 17:07:50,377 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.8823529411764706) internal successors, (98), 34 states have internal predecessors, (98), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 46 [2023-12-15 17:07:50,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:07:50,378 INFO L225 Difference]: With dead ends: 97 [2023-12-15 17:07:50,378 INFO L226 Difference]: Without dead ends: 78 [2023-12-15 17:07:50,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=438, Invalid=1202, Unknown=0, NotChecked=0, Total=1640 [2023-12-15 17:07:50,379 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 168 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:07:50,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 101 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:07:50,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-12-15 17:07:50,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 64. [2023-12-15 17:07:50,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 52 states have internal predecessors, (64), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-15 17:07:50,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2023-12-15 17:07:50,391 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 46 [2023-12-15 17:07:50,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:07:50,391 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2023-12-15 17:07:50,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.8823529411764706) internal successors, (98), 34 states have internal predecessors, (98), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-12-15 17:07:50,391 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2023-12-15 17:07:50,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-15 17:07:50,391 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:07:50,392 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:07:50,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-15 17:07:50,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-15 17:07:50,594 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:07:50,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:07:50,594 INFO L85 PathProgramCache]: Analyzing trace with hash -564337215, now seen corresponding path program 6 times [2023-12-15 17:07:50,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:07:50,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873247134] [2023-12-15 17:07:50,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:07:50,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:07:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:50,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-15 17:07:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:50,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-15 17:07:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:50,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-15 17:07:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:50,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-15 17:07:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:50,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-12-15 17:07:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:50,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-15 17:07:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:07:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-15 17:07:50,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:07:50,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873247134] [2023-12-15 17:07:50,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873247134] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:07:50,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685270004] [2023-12-15 17:07:50,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-15 17:07:50,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:07:50,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:07:50,829 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 17:07:50,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-15 17:07:50,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-12-15 17:07:50,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:07:50,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-15 17:07:50,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:07:51,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-15 17:07:51,081 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 24 treesize of output 12 [2023-12-15 17:07:51,295 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-15 17:07:51,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:07:51,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-12-15 17:07:51,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-12-15 17:07:51,417 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-15 17:07:51,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685270004] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:07:51,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:07:51,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 14] total 29 [2023-12-15 17:07:51,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494906380] [2023-12-15 17:07:51,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:07:51,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-15 17:07:51,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:07:51,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-15 17:07:51,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2023-12-15 17:07:51,418 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand has 29 states, 29 states have (on average 3.1379310344827585) internal successors, (91), 29 states have internal predecessors, (91), 9 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2023-12-15 17:07:55,459 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] [2023-12-15 17:07:59,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-15 17:08:03,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-15 17:08:07,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-15 17:08:11,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-15 17:08:15,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-15 17:08:19,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-15 17:08:23,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-15 17:08:27,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-15 17:08:31,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-15 17:08:35,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-15 17:08:39,826 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] Received shutdown request... [2023-12-15 17:08:40,558 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 17:08:40,559 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 17:08:41,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-15 17:08:41,766 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2023-12-15 17:08:41,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=306, Invalid=1950, Unknown=0, NotChecked=0, Total=2256 [2023-12-15 17:08:41,775 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 53 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 42 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.4s IncrementalHoareTripleChecker+Time [2023-12-15 17:08:41,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 377 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 822 Invalid, 12 Unknown, 0 Unchecked, 48.4s Time] [2023-12-15 17:08:41,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 137 [2023-12-15 17:08:41,777 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 17:08:41,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-15 17:08:41,777 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-12-15 17:08:41,781 INFO L445 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1, 1, 1] [2023-12-15 17:08:41,782 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 17:08:41,783 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 05:08:41 BoogieIcfgContainer [2023-12-15 17:08:41,783 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 17:08:41,784 INFO L158 Benchmark]: Toolchain (without parser) took 75716.91ms. Allocated memory was 190.8MB in the beginning and 425.7MB in the end (delta: 234.9MB). Free memory was 143.2MB in the beginning and 254.1MB in the end (delta: -110.9MB). Peak memory consumption was 125.6MB. Max. memory is 8.0GB. [2023-12-15 17:08:41,784 INFO L158 Benchmark]: CDTParser took 0.44ms. Allocated memory is still 190.8MB. Free memory is still 139.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 17:08:41,784 INFO L158 Benchmark]: CACSL2BoogieTranslator took 150.06ms. Allocated memory is still 190.8MB. Free memory was 143.2MB in the beginning and 131.7MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-15 17:08:41,784 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.55ms. Allocated memory is still 190.8MB. Free memory was 131.7MB in the beginning and 129.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 17:08:41,784 INFO L158 Benchmark]: Boogie Preprocessor took 38.64ms. Allocated memory is still 190.8MB. Free memory was 129.9MB in the beginning and 127.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 17:08:41,784 INFO L158 Benchmark]: RCFGBuilder took 307.97ms. Allocated memory is still 190.8MB. Free memory was 127.8MB in the beginning and 114.5MB in the end (delta: 13.3MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-15 17:08:41,784 INFO L158 Benchmark]: TraceAbstraction took 75190.09ms. Allocated memory was 190.8MB in the beginning and 425.7MB in the end (delta: 234.9MB). Free memory was 113.8MB in the beginning and 254.1MB in the end (delta: -140.2MB). Peak memory consumption was 96.2MB. Max. memory is 8.0GB. [2023-12-15 17:08:41,785 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44ms. Allocated memory is still 190.8MB. Free memory is still 139.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 150.06ms. Allocated memory is still 190.8MB. Free memory was 143.2MB in the beginning and 131.7MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 26.55ms. Allocated memory is still 190.8MB. Free memory was 131.7MB in the beginning and 129.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.64ms. Allocated memory is still 190.8MB. Free memory was 129.9MB in the beginning and 127.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 307.97ms. Allocated memory is still 190.8MB. Free memory was 127.8MB in the beginning and 114.5MB in the end (delta: 13.3MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 75190.09ms. Allocated memory was 190.8MB in the beginning and 425.7MB in the end (delta: 234.9MB). Free memory was 113.8MB in the beginning and 254.1MB in the end (delta: -140.2MB). Peak memory consumption was 96.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 8]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 8). Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 75.2s, OverallIterations: 12, TraceHistogramMax: 6, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 65.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 mSolverCounterUnknown, 1381 SdHoareTripleChecker+Valid, 60.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1354 mSDsluCounter, 2641 SdHoareTripleChecker+Invalid, 60.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2326 mSDsCounter, 518 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6008 IncrementalHoareTripleChecker+Invalid, 6545 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 518 mSolverCounterUnsat, 315 mSDtfsCounter, 6008 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1136 GetRequests, 713 SyntacticMatches, 8 SemanticMatches, 415 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4646 ImplicationChecksByTransitivity, 4.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=9, InterpolantAutomatonStates: 212, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 573 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 6.7s InterpolantComputationTime, 794 NumberOfCodeBlocks, 779 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 1152 ConstructedInterpolants, 6 QuantifiedInterpolants, 8986 SizeOfPredicates, 139 NumberOfNonLiveVariables, 1690 ConjunctsInSsa, 277 ConjunctsInUnsatCore, 34 InterpolantComputations, 1 PerfectInterpolantSequences, 385/867 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown