/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 false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 23:56:49,198 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 23:56:49,283 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 23:56:49,288 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 23:56:49,289 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 23:56:49,314 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 23:56:49,315 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 23:56:49,315 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 23:56:49,316 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 23:56:49,320 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 23:56:49,320 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 23:56:49,320 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 23:56:49,321 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 23:56:49,322 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 23:56:49,322 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 23:56:49,323 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 23:56:49,323 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 23:56:49,323 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 23:56:49,323 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 23:56:49,323 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 23:56:49,324 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 23:56:49,324 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 23:56:49,324 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 23:56:49,325 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 23:56:49,325 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 23:56:49,325 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 23:56:49,325 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 23:56:49,326 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 23:56:49,326 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 23:56:49,326 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 23:56:49,327 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 23:56:49,327 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 23:56:49,328 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 23:56:49,328 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 23:56:49,328 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 23:56:49,328 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 23:56:49,328 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 23:56:49,329 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 23:56:49,329 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 23:56:49,329 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 23:56:49,329 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 23:56:49,330 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 23:56:49,330 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 23:56:49,330 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-15 23:56:49,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 23:56:49,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 23:56:49,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 23:56:49,600 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 23:56:49,602 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 23:56:49,603 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i [2023-12-15 23:56:50,816 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 23:56:50,996 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 23:56:50,997 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i [2023-12-15 23:56:51,003 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e3d62be6/55c9ea55796942849a5d93e8a81a5ac7/FLAGa591db000 [2023-12-15 23:56:51,014 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e3d62be6/55c9ea55796942849a5d93e8a81a5ac7 [2023-12-15 23:56:51,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 23:56:51,017 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 23:56:51,018 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 23:56:51,019 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 23:56:51,031 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 23:56:51,032 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:56:51" (1/1) ... [2023-12-15 23:56:51,033 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b431379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:51, skipping insertion in model container [2023-12-15 23:56:51,033 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:56:51" (1/1) ... [2023-12-15 23:56:51,054 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 23:56:51,206 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-examples/sanfoundry_27_ground.i[813,826] [2023-12-15 23:56:51,223 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 23:56:51,230 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 23:56:51,242 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-examples/sanfoundry_27_ground.i[813,826] [2023-12-15 23:56:51,252 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 23:56:51,265 INFO L206 MainTranslator]: Completed translation [2023-12-15 23:56:51,265 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:51 WrapperNode [2023-12-15 23:56:51,266 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 23:56:51,267 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 23:56:51,268 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 23:56:51,268 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 23:56:51,274 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:51" (1/1) ... [2023-12-15 23:56:51,280 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:51" (1/1) ... [2023-12-15 23:56:51,297 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2023-12-15 23:56:51,297 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 23:56:51,298 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 23:56:51,298 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 23:56:51,298 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 23:56:51,307 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:51" (1/1) ... [2023-12-15 23:56:51,307 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:51" (1/1) ... [2023-12-15 23:56:51,317 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:51" (1/1) ... [2023-12-15 23:56:51,327 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-12-15 23:56:51,328 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:51" (1/1) ... [2023-12-15 23:56:51,328 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:51" (1/1) ... [2023-12-15 23:56:51,331 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:51" (1/1) ... [2023-12-15 23:56:51,334 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:51" (1/1) ... [2023-12-15 23:56:51,334 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:51" (1/1) ... [2023-12-15 23:56:51,335 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:51" (1/1) ... [2023-12-15 23:56:51,336 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 23:56:51,339 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 23:56:51,339 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 23:56:51,339 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 23:56:51,340 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:51" (1/1) ... [2023-12-15 23:56:51,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 23:56:51,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:56:51,377 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 23:56:51,416 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 23:56:51,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 23:56:51,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 23:56:51,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-15 23:56:51,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-15 23:56:51,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-15 23:56:51,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-15 23:56:51,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 23:56:51,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 23:56:51,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-15 23:56:51,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-15 23:56:51,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-15 23:56:51,495 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 23:56:51,497 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 23:56:51,654 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 23:56:51,683 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 23:56:51,684 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-15 23:56:51,684 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:56:51 BoogieIcfgContainer [2023-12-15 23:56:51,684 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 23:56:51,686 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 23:56:51,686 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 23:56:51,689 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 23:56:51,689 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:56:51" (1/3) ... [2023-12-15 23:56:51,690 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569f554c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:56:51, skipping insertion in model container [2023-12-15 23:56:51,690 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:51" (2/3) ... [2023-12-15 23:56:51,690 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569f554c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:56:51, skipping insertion in model container [2023-12-15 23:56:51,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:56:51" (3/3) ... [2023-12-15 23:56:51,692 INFO L112 eAbstractionObserver]: Analyzing ICFG sanfoundry_27_ground.i [2023-12-15 23:56:51,707 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 23:56:51,708 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 23:56:51,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 23:56:51,765 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;@664041d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 23:56:51,766 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 23:56:51,771 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:56:51,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-15 23:56:51,777 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:56:51,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:56:51,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:56:51,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:56:51,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1357947524, now seen corresponding path program 1 times [2023-12-15 23:56:51,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:56:51,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824987188] [2023-12-15 23:56:51,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:56:51,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:56:51,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:56:52,030 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 23:56:52,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:56:52,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824987188] [2023-12-15 23:56:52,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824987188] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:56:52,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:56:52,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 23:56:52,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432948700] [2023-12-15 23:56:52,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:56:52,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 23:56:52,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:56:52,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 23:56:52,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 23:56:52,079 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 23:56:52,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:56:52,130 INFO L93 Difference]: Finished difference Result 27 states and 41 transitions. [2023-12-15 23:56:52,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 23:56:52,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-15 23:56:52,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:56:52,137 INFO L225 Difference]: With dead ends: 27 [2023-12-15 23:56:52,137 INFO L226 Difference]: Without dead ends: 13 [2023-12-15 23:56:52,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 23:56:52,142 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 23:56:52,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 23:56:52,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-12-15 23:56:52,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-12-15 23:56:52,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:56:52,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2023-12-15 23:56:52,163 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2023-12-15 23:56:52,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:56:52,164 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2023-12-15 23:56:52,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 23:56:52,164 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2023-12-15 23:56:52,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-15 23:56:52,164 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:56:52,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:56:52,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-15 23:56:52,165 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:56:52,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:56:52,166 INFO L85 PathProgramCache]: Analyzing trace with hash -115742476, now seen corresponding path program 1 times [2023-12-15 23:56:52,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:56:52,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767277528] [2023-12-15 23:56:52,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:56:52,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:56:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:56:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:56:52,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:56:52,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767277528] [2023-12-15 23:56:52,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767277528] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:56:52,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940481421] [2023-12-15 23:56:52,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:56:52,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:56:52,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:56:52,233 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 23:56:52,235 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 23:56:52,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:56:52,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 23:56:52,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:56:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 23:56:52,319 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 23:56:52,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940481421] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:56:52,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 23:56:52,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-12-15 23:56:52,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264670591] [2023-12-15 23:56:52,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:56:52,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 23:56:52,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:56:52,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 23:56:52,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-15 23:56:52,323 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:56:52,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:56:52,343 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2023-12-15 23:56:52,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 23:56:52,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-15 23:56:52,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:56:52,344 INFO L225 Difference]: With dead ends: 22 [2023-12-15 23:56:52,344 INFO L226 Difference]: Without dead ends: 16 [2023-12-15 23:56:52,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-15 23:56:52,345 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 23:56:52,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 23:56:52,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-12-15 23:56:52,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2023-12-15 23:56:52,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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 23:56:52,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2023-12-15 23:56:52,349 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2023-12-15 23:56:52,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:56:52,350 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2023-12-15 23:56:52,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:56:52,350 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2023-12-15 23:56:52,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-15 23:56:52,350 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:56:52,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:56:52,359 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 23:56:52,556 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 23:56:52,557 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:56:52,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:56:52,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1089135888, now seen corresponding path program 1 times [2023-12-15 23:56:52,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:56:52,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319969740] [2023-12-15 23:56:52,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:56:52,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:56:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:56:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 23:56:52,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:56:52,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319969740] [2023-12-15 23:56:52,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319969740] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:56:52,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045336348] [2023-12-15 23:56:52,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:56:52,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:56:52,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:56:52,654 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 23:56:52,672 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 23:56:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:56:52,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-15 23:56:52,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:56:52,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 23:56:52,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:56:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 23:56:52,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045336348] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 23:56:52,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 23:56:52,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-12-15 23:56:52,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464357715] [2023-12-15 23:56:52,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 23:56:52,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 23:56:52,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:56:52,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 23:56:52,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-15 23:56:52,771 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 23:56:52,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:56:52,827 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2023-12-15 23:56:52,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 23:56:52,828 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-15 23:56:52,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:56:52,830 INFO L225 Difference]: With dead ends: 34 [2023-12-15 23:56:52,830 INFO L226 Difference]: Without dead ends: 23 [2023-12-15 23:56:52,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-15 23:56:52,833 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 23:56:52,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 23 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 23:56:52,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-15 23:56:52,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-15 23:56:52,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:56:52,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-12-15 23:56:52,843 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 12 [2023-12-15 23:56:52,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:56:52,844 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-12-15 23:56:52,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 23:56:52,844 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-12-15 23:56:52,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-15 23:56:52,845 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:56:52,845 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:56:52,850 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 23:56:53,050 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 23:56:53,050 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:56:53,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:56:53,051 INFO L85 PathProgramCache]: Analyzing trace with hash -792155541, now seen corresponding path program 2 times [2023-12-15 23:56:53,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:56:53,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426283451] [2023-12-15 23:56:53,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:56:53,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:56:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:56:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-15 23:56:53,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:56:53,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426283451] [2023-12-15 23:56:53,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426283451] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:56:53,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870791112] [2023-12-15 23:56:53,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 23:56:53,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:56:53,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:56:53,214 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 23:56:53,218 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 23:56:53,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 23:56:53,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 23:56:53,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 23:56:53,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:56:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-15 23:56:53,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:56:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-15 23:56:53,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870791112] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 23:56:53,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 23:56:53,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-12-15 23:56:53,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649479597] [2023-12-15 23:56:53,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 23:56:53,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-15 23:56:53,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:56:53,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-15 23:56:53,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-12-15 23:56:53,380 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 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 23:56:53,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:56:53,473 INFO L93 Difference]: Finished difference Result 64 states and 91 transitions. [2023-12-15 23:56:53,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-15 23:56:53,473 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-12-15 23:56:53,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:56:53,474 INFO L225 Difference]: With dead ends: 64 [2023-12-15 23:56:53,475 INFO L226 Difference]: Without dead ends: 47 [2023-12-15 23:56:53,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-12-15 23:56:53,477 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 57 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 23:56:53,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 33 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 23:56:53,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-15 23:56:53,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-12-15 23:56:53,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 46 states have internal predecessors, (58), 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 23:56:53,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2023-12-15 23:56:53,484 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 21 [2023-12-15 23:56:53,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:56:53,484 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2023-12-15 23:56:53,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 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 23:56:53,484 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2023-12-15 23:56:53,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-15 23:56:53,485 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:56:53,485 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:56:53,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-15 23:56:53,691 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 23:56:53,692 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:56:53,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:56:53,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1047474165, now seen corresponding path program 3 times [2023-12-15 23:56:53,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:56:53,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940248672] [2023-12-15 23:56:53,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:56:53,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:56:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:56:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-12-15 23:56:54,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:56:54,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940248672] [2023-12-15 23:56:54,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940248672] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:56:54,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873903101] [2023-12-15 23:56:54,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 23:56:54,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:56:54,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:56:54,020 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 23:56:54,041 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 23:56:54,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-15 23:56:54,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 23:56:54,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-15 23:56:54,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:56:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-12-15 23:56:54,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:56:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-12-15 23:56:54,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873903101] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 23:56:54,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 23:56:54,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-12-15 23:56:54,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962810805] [2023-12-15 23:56:54,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 23:56:54,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-15 23:56:54,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:56:54,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-15 23:56:54,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-15 23:56:54,432 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 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 23:56:54,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:56:54,617 INFO L93 Difference]: Finished difference Result 130 states and 187 transitions. [2023-12-15 23:56:54,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-15 23:56:54,617 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 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 45 [2023-12-15 23:56:54,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:56:54,620 INFO L225 Difference]: With dead ends: 130 [2023-12-15 23:56:54,620 INFO L226 Difference]: Without dead ends: 95 [2023-12-15 23:56:54,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-15 23:56:54,622 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 210 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 23:56:54,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 51 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 23:56:54,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-12-15 23:56:54,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2023-12-15 23:56:54,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.2553191489361701) internal successors, (118), 94 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:56:54,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2023-12-15 23:56:54,652 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 45 [2023-12-15 23:56:54,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:56:54,653 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2023-12-15 23:56:54,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 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 23:56:54,653 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2023-12-15 23:56:54,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-15 23:56:54,655 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:56:54,655 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:56:54,667 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 23:56:54,866 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 23:56:54,867 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:56:54,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:56:54,867 INFO L85 PathProgramCache]: Analyzing trace with hash 707380043, now seen corresponding path program 4 times [2023-12-15 23:56:54,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:56:54,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035210491] [2023-12-15 23:56:54,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:56:54,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:56:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:56:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2023-12-15 23:56:55,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:56:55,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035210491] [2023-12-15 23:56:55,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035210491] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:56:55,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999070182] [2023-12-15 23:56:55,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 23:56:55,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:56:55,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:56:55,654 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 23:56:55,666 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 23:56:55,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 23:56:55,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 23:56:55,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-15 23:56:55,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:56:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-12-15 23:56:55,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:56:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-12-15 23:56:56,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999070182] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 23:56:56,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 23:56:56,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2023-12-15 23:56:56,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811578723] [2023-12-15 23:56:56,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 23:56:56,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-15 23:56:56,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:56:56,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-15 23:56:56,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2023-12-15 23:56:56,644 INFO L87 Difference]: Start difference. First operand 95 states and 118 transitions. Second operand has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 47 states have internal predecessors, (166), 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 23:56:56,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:56:56,939 INFO L93 Difference]: Finished difference Result 258 states and 372 transitions. [2023-12-15 23:56:56,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-12-15 23:56:56,939 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 47 states have internal predecessors, (166), 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 93 [2023-12-15 23:56:56,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:56:56,940 INFO L225 Difference]: With dead ends: 258 [2023-12-15 23:56:56,941 INFO L226 Difference]: Without dead ends: 187 [2023-12-15 23:56:56,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2023-12-15 23:56:56,942 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 135 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 23:56:56,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 73 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 23:56:56,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-12-15 23:56:56,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2023-12-15 23:56:56,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.2526881720430108) internal successors, (233), 186 states have internal predecessors, (233), 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 23:56:56,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 233 transitions. [2023-12-15 23:56:56,955 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 233 transitions. Word has length 93 [2023-12-15 23:56:56,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:56:56,956 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 233 transitions. [2023-12-15 23:56:56,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 47 states have internal predecessors, (166), 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 23:56:56,956 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 233 transitions. [2023-12-15 23:56:56,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-12-15 23:56:56,966 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:56:56,966 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:56:56,979 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 23:56:57,172 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 23:56:57,173 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:56:57,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:56:57,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1686049356, now seen corresponding path program 5 times [2023-12-15 23:56:57,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:56:57,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515839526] [2023-12-15 23:56:57,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:56:57,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:56:57,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:56:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3917 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 2882 trivial. 0 not checked. [2023-12-15 23:56:59,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:56:59,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515839526] [2023-12-15 23:56:59,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515839526] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:56:59,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316902766] [2023-12-15 23:56:59,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 23:56:59,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:56:59,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:56:59,549 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 23:56:59,552 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 23:57:45,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 45 check-sat command(s) [2023-12-15 23:57:45,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 23:57:45,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-15 23:57:45,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:57:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3917 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2023-12-15 23:57:45,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:57:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3917 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2023-12-15 23:57:47,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316902766] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 23:57:47,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 23:57:47,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2023-12-15 23:57:47,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873972994] [2023-12-15 23:57:47,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 23:57:47,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2023-12-15 23:57:47,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:57:47,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2023-12-15 23:57:47,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2023-12-15 23:57:47,756 INFO L87 Difference]: Start difference. First operand 187 states and 233 transitions. Second operand has 93 states, 93 states have (on average 3.5161290322580645) internal successors, (327), 93 states have internal predecessors, (327), 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 23:57:48,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:57:48,606 INFO L93 Difference]: Finished difference Result 511 states and 740 transitions. [2023-12-15 23:57:48,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-12-15 23:57:48,613 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 3.5161290322580645) internal successors, (327), 93 states have internal predecessors, (327), 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 185 [2023-12-15 23:57:48,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:57:48,615 INFO L225 Difference]: With dead ends: 511 [2023-12-15 23:57:48,615 INFO L226 Difference]: Without dead ends: 371 [2023-12-15 23:57:48,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2023-12-15 23:57:48,619 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 315 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-15 23:57:48,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 149 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-15 23:57:48,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2023-12-15 23:57:48,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2023-12-15 23:57:48,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.2513513513513514) internal successors, (463), 370 states have internal predecessors, (463), 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 23:57:48,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 463 transitions. [2023-12-15 23:57:48,637 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 463 transitions. Word has length 185 [2023-12-15 23:57:48,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:57:48,638 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 463 transitions. [2023-12-15 23:57:48,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.5161290322580645) internal successors, (327), 93 states have internal predecessors, (327), 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 23:57:48,638 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 463 transitions. [2023-12-15 23:57:48,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2023-12-15 23:57:48,643 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:57:48,644 INFO L195 NwaCegarLoop]: trace histogram [91, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:57:48,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-15 23:57:48,860 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 23:57:48,860 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:57:48,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:57:48,861 INFO L85 PathProgramCache]: Analyzing trace with hash -885096044, now seen corresponding path program 6 times [2023-12-15 23:57:48,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:57:48,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142170135] [2023-12-15 23:57:48,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:57:48,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:57:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:57:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16291 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 12105 trivial. 0 not checked. [2023-12-15 23:57:55,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:57:55,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142170135] [2023-12-15 23:57:55,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142170135] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:57:55,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158953131] [2023-12-15 23:57:55,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-15 23:57:55,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:57:55,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:57:55,267 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 23:57:55,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process Received shutdown request... [2023-12-15 23:58:00,873 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 23:58:00,876 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 23:58:01,883 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 0 [2023-12-15 23:58:02,079 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forcibly destroying the process [2023-12-15 23:58:02,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 137 [2023-12-15 23:58:02,085 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 23:58:02,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-15 23:58:02,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2023-12-15 23:58:02,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755640279] [2023-12-15 23:58:02,085 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-15 23:58:02,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2023-12-15 23:58:02,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:58:02,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2023-12-15 23:58:02,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2023-12-15 23:58:02,104 INFO L87 Difference]: Start difference. First operand 371 states and 463 transitions. Second operand has 94 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 93 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:58:02,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-15 23:58:02,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2023-12-15 23:58:02,108 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 23:58:02,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 23:58:02,109 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 23:58:02,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-15 23:58:02,110 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (371states) and FLOYD_HOARE automaton (currently 2 states, 94 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). [2023-12-15 23:58:02,114 INFO L445 BasicCegarLoop]: Path program histogram: [6, 1, 1] [2023-12-15 23:58:02,116 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 23:58:02,117 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 11:58:02 BoogieIcfgContainer [2023-12-15 23:58:02,117 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 23:58:02,118 INFO L158 Benchmark]: Toolchain (without parser) took 71100.55ms. Allocated memory was 176.2MB in the beginning and 570.4MB in the end (delta: 394.3MB). Free memory was 127.9MB in the beginning and 530.8MB in the end (delta: -402.9MB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 23:58:02,118 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 176.2MB. Free memory is still 129.7MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 23:58:02,118 INFO L158 Benchmark]: CACSL2BoogieTranslator took 247.95ms. Allocated memory is still 176.2MB. Free memory was 127.9MB in the beginning and 117.0MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-15 23:58:02,119 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.83ms. Allocated memory is still 176.2MB. Free memory was 117.0MB in the beginning and 115.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 23:58:02,119 INFO L158 Benchmark]: Boogie Preprocessor took 38.20ms. Allocated memory is still 176.2MB. Free memory was 115.3MB in the beginning and 113.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 23:58:02,119 INFO L158 Benchmark]: RCFGBuilder took 344.98ms. Allocated memory is still 176.2MB. Free memory was 113.5MB in the beginning and 102.0MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-15 23:58:02,119 INFO L158 Benchmark]: TraceAbstraction took 70431.54ms. Allocated memory was 176.2MB in the beginning and 570.4MB in the end (delta: 394.3MB). Free memory was 101.3MB in the beginning and 530.8MB in the end (delta: -429.5MB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 23:58:02,120 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 176.2MB. Free memory is still 129.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 247.95ms. Allocated memory is still 176.2MB. Free memory was 127.9MB in the beginning and 117.0MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 29.83ms. Allocated memory is still 176.2MB. Free memory was 117.0MB in the beginning and 115.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.20ms. Allocated memory is still 176.2MB. Free memory was 115.3MB in the beginning and 113.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 344.98ms. Allocated memory is still 176.2MB. Free memory was 113.5MB in the beginning and 102.0MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 70431.54ms. Allocated memory was 176.2MB in the beginning and 570.4MB in the end (delta: 394.3MB). Free memory was 101.3MB in the beginning and 530.8MB in the end (delta: -429.5MB). There was no memory consumed. 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: 13]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 13). Cancelled while NwaCegarLoop was constructing difference of abstraction (371states) and FLOYD_HOARE automaton (currently 2 states, 94 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 70.4s, OverallIterations: 8, TraceHistogramMax: 91, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 735 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 735 mSDsluCounter, 364 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 297 mSDsCounter, 386 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 813 IncrementalHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 386 mSolverCounterUnsat, 67 mSDtfsCounter, 813 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 900 GetRequests, 630 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 7.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=371occurred in iteration=7, InterpolantAutomatonStates: 188, 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, 7 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 46.0s SatisfiabilityAnalysisTime, 13.7s InterpolantComputationTime, 1107 NumberOfCodeBlocks, 1095 NumberOfCodeBlocksAsserted, 65 NumberOfCheckSat, 1444 ConstructedInterpolants, 0 QuantifiedInterpolants, 2670 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1781 ConjunctsInSsa, 92 ConjunctsInUnsatCore, 19 InterpolantComputations, 2 PerfectInterpolantSequences, 18605/31344 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