/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 16:55:01,214 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 16:55:01,298 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 16:55:01,304 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 16:55:01,305 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 16:55:01,332 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 16:55:01,332 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 16:55:01,332 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 16:55:01,333 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 16:55:01,336 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 16:55:01,337 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 16:55:01,337 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 16:55:01,338 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 16:55:01,339 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 16:55:01,339 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 16:55:01,339 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 16:55:01,340 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 16:55:01,340 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 16:55:01,340 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 16:55:01,340 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 16:55:01,341 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 16:55:01,342 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 16:55:01,342 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 16:55:01,342 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 16:55:01,342 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 16:55:01,343 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 16:55:01,343 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 16:55:01,343 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 16:55:01,343 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 16:55:01,344 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 16:55:01,344 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 16:55:01,345 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 16:55:01,345 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 16:55:01,345 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 16:55:01,345 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 16:55:01,345 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 16:55:01,345 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 16:55:01,346 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 16:55:01,346 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 16:55:01,346 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 16:55:01,346 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 16:55:01,346 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 16:55:01,346 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 16:55:01,346 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 16:55:01,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 16:55:01,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 16:55:01,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 16:55:01,587 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 16:55:01,587 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 16:55:01,588 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c [2023-12-15 16:55:02,742 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 16:55:02,886 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 16:55:02,887 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c [2023-12-15 16:55:02,893 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/389084109/4db4fc0e7f8c4d258e87b4de2ee65874/FLAGa22dec13f [2023-12-15 16:55:02,906 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/389084109/4db4fc0e7f8c4d258e87b4de2ee65874 [2023-12-15 16:55:02,908 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 16:55:02,909 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 16:55:02,910 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 16:55:02,910 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 16:55:02,919 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 16:55:02,920 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 04:55:02" (1/1) ... [2023-12-15 16:55:02,921 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38c5b04d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:02, skipping insertion in model container [2023-12-15 16:55:02,921 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 04:55:02" (1/1) ... [2023-12-15 16:55:02,941 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 16:55:03,063 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_10_ground.c[324,337] [2023-12-15 16:55:03,079 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 16:55:03,086 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 16:55:03,096 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_10_ground.c[324,337] [2023-12-15 16:55:03,103 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 16:55:03,118 INFO L206 MainTranslator]: Completed translation [2023-12-15 16:55:03,119 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:03 WrapperNode [2023-12-15 16:55:03,119 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 16:55:03,121 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 16:55:03,121 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 16:55:03,121 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 16:55:03,126 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:03" (1/1) ... [2023-12-15 16:55:03,135 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:03" (1/1) ... [2023-12-15 16:55:03,151 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2023-12-15 16:55:03,152 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 16:55:03,152 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 16:55:03,152 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 16:55:03,152 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 16:55:03,160 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:03" (1/1) ... [2023-12-15 16:55:03,160 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:03" (1/1) ... [2023-12-15 16:55:03,161 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:03" (1/1) ... [2023-12-15 16:55:03,172 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 2 writes are split as follows [0, 2]. [2023-12-15 16:55:03,172 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:03" (1/1) ... [2023-12-15 16:55:03,172 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:03" (1/1) ... [2023-12-15 16:55:03,187 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:03" (1/1) ... [2023-12-15 16:55:03,190 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:03" (1/1) ... [2023-12-15 16:55:03,191 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:03" (1/1) ... [2023-12-15 16:55:03,192 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:03" (1/1) ... [2023-12-15 16:55:03,194 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 16:55:03,195 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 16:55:03,195 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 16:55:03,195 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 16:55:03,195 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:03" (1/1) ... [2023-12-15 16:55:03,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 16:55:03,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:55:03,224 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 16:55:03,251 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 16:55:03,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 16:55:03,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 16:55:03,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-15 16:55:03,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-15 16:55:03,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-15 16:55:03,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-15 16:55:03,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 16:55:03,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 16:55:03,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-15 16:55:03,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-15 16:55:03,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-15 16:55:03,356 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 16:55:03,358 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 16:55:03,560 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 16:55:03,587 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 16:55:03,587 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-15 16:55:03,587 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 04:55:03 BoogieIcfgContainer [2023-12-15 16:55:03,587 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 16:55:03,589 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 16:55:03,589 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 16:55:03,592 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 16:55:03,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 04:55:02" (1/3) ... [2023-12-15 16:55:03,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c42dd53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 04:55:03, skipping insertion in model container [2023-12-15 16:55:03,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:03" (2/3) ... [2023-12-15 16:55:03,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c42dd53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 04:55:03, skipping insertion in model container [2023-12-15 16:55:03,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 04:55:03" (3/3) ... [2023-12-15 16:55:03,594 INFO L112 eAbstractionObserver]: Analyzing ICFG sanfoundry_10_ground.c [2023-12-15 16:55:03,615 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 16:55:03,615 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 16:55:03,656 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 16:55:03,662 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;@295771ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 16:55:03,662 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 16:55:03,665 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 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 16:55:03,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-15 16:55:03,670 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:55:03,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:55:03,671 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:55:03,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:55:03,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1901142431, now seen corresponding path program 1 times [2023-12-15 16:55:03,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:55:03,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998859027] [2023-12-15 16:55:03,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:03,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:55:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:03,898 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 16:55:03,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:55:03,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998859027] [2023-12-15 16:55:03,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998859027] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 16:55:03,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 16:55:03,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 16:55:03,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823455802] [2023-12-15 16:55:03,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 16:55:03,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 16:55:03,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:55:03,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 16:55:03,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 16:55:03,937 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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 16:55:03,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:55:03,984 INFO L93 Difference]: Finished difference Result 33 states and 55 transitions. [2023-12-15 16:55:03,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 16:55:03,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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 16:55:03,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:55:03,994 INFO L225 Difference]: With dead ends: 33 [2023-12-15 16:55:03,994 INFO L226 Difference]: Without dead ends: 15 [2023-12-15 16:55:03,996 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 16:55:03,999 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 16:55:04,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 16:55:04,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-12-15 16:55:04,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-12-15 16:55:04,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 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 16:55:04,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2023-12-15 16:55:04,036 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 9 [2023-12-15 16:55:04,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:55:04,036 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2023-12-15 16:55:04,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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 16:55:04,036 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2023-12-15 16:55:04,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-15 16:55:04,037 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:55:04,037 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:55:04,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-15 16:55:04,038 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:55:04,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:55:04,039 INFO L85 PathProgramCache]: Analyzing trace with hash -37017485, now seen corresponding path program 1 times [2023-12-15 16:55:04,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:55:04,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720749361] [2023-12-15 16:55:04,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:04,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:55:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:04,187 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 16:55:04,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:55:04,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720749361] [2023-12-15 16:55:04,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720749361] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 16:55:04,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 16:55:04,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 16:55:04,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805399408] [2023-12-15 16:55:04,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 16:55:04,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 16:55:04,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:55:04,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 16:55:04,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-15 16:55:04,192 INFO L87 Difference]: Start difference. First operand 15 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:55:04,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:55:04,250 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2023-12-15 16:55:04,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 16:55:04,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-15 16:55:04,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:55:04,253 INFO L225 Difference]: With dead ends: 31 [2023-12-15 16:55:04,253 INFO L226 Difference]: Without dead ends: 21 [2023-12-15 16:55:04,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-15 16:55:04,255 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 16:55:04,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 16:55:04,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-15 16:55:04,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2023-12-15 16:55:04,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:55:04,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2023-12-15 16:55:04,272 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 10 [2023-12-15 16:55:04,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:55:04,273 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2023-12-15 16:55:04,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:55:04,273 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2023-12-15 16:55:04,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-15 16:55:04,273 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:55:04,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:55:04,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-15 16:55:04,274 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:55:04,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:55:04,275 INFO L85 PathProgramCache]: Analyzing trace with hash -851183943, now seen corresponding path program 1 times [2023-12-15 16:55:04,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:55:04,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467846478] [2023-12-15 16:55:04,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:04,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:55:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:04,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 16:55:04,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:55:04,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467846478] [2023-12-15 16:55:04,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467846478] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 16:55:04,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 16:55:04,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 16:55:04,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260070852] [2023-12-15 16:55:04,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 16:55:04,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 16:55:04,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:55:04,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 16:55:04,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 16:55:04,384 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:55:04,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:55:04,407 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2023-12-15 16:55:04,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 16:55:04,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-15 16:55:04,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:55:04,408 INFO L225 Difference]: With dead ends: 28 [2023-12-15 16:55:04,408 INFO L226 Difference]: Without dead ends: 17 [2023-12-15 16:55:04,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 16:55:04,409 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 16:55:04,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 15 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 16:55:04,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-15 16:55:04,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-15 16:55:04,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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 16:55:04,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-12-15 16:55:04,413 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2023-12-15 16:55:04,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:55:04,414 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-12-15 16:55:04,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:55:04,414 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-12-15 16:55:04,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-15 16:55:04,414 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:55:04,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:55:04,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-15 16:55:04,415 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:55:04,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:55:04,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1058582699, now seen corresponding path program 1 times [2023-12-15 16:55:04,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:55:04,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172779304] [2023-12-15 16:55:04,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:04,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:55:04,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:04,514 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 16:55:04,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:55:04,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172779304] [2023-12-15 16:55:04,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172779304] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 16:55:04,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915934267] [2023-12-15 16:55:04,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:04,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:04,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:55:04,522 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 16:55:04,550 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 16:55:04,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:04,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 16:55:04,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 16:55:04,663 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 16:55:04,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 16:55:04,695 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 16:55:04,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915934267] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 16:55:04,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 16:55:04,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-12-15 16:55:04,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735721250] [2023-12-15 16:55:04,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 16:55:04,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-15 16:55:04,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:55:04,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-15 16:55:04,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-12-15 16:55:04,702 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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 16:55:04,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:55:04,876 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2023-12-15 16:55:04,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-15 16:55:04,876 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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 14 [2023-12-15 16:55:04,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:55:04,878 INFO L225 Difference]: With dead ends: 70 [2023-12-15 16:55:04,878 INFO L226 Difference]: Without dead ends: 56 [2023-12-15 16:55:04,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2023-12-15 16:55:04,885 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 70 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 16:55:04,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 33 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 16:55:04,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-12-15 16:55:04,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 28. [2023-12-15 16:55:04,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 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 16:55:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-12-15 16:55:04,900 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 14 [2023-12-15 16:55:04,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:55:04,900 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-12-15 16:55:04,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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 16:55:04,901 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-12-15 16:55:04,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-15 16:55:04,901 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:55:04,901 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:55:04,909 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 16:55:05,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:05,108 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:55:05,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:55:05,109 INFO L85 PathProgramCache]: Analyzing trace with hash 159487876, now seen corresponding path program 1 times [2023-12-15 16:55:05,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:55:05,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947993843] [2023-12-15 16:55:05,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:05,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:55:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-15 16:55:05,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:55:05,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947993843] [2023-12-15 16:55:05,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947993843] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 16:55:05,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839078595] [2023-12-15 16:55:05,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:05,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:05,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:55:05,237 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 16:55:05,263 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 16:55:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:05,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-15 16:55:05,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 16:55:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-15 16:55:05,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 16:55:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-15 16:55:05,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839078595] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 16:55:05,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 16:55:05,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-12-15 16:55:05,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223941703] [2023-12-15 16:55:05,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 16:55:05,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-15 16:55:05,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:55:05,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-15 16:55:05,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-12-15 16:55:05,472 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 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 16:55:05,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:55:05,600 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2023-12-15 16:55:05,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-15 16:55:05,600 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-15 16:55:05,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:55:05,601 INFO L225 Difference]: With dead ends: 67 [2023-12-15 16:55:05,601 INFO L226 Difference]: Without dead ends: 36 [2023-12-15 16:55:05,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2023-12-15 16:55:05,602 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 16:55:05,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 62 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 16:55:05,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-15 16:55:05,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2023-12-15 16:55:05,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 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 16:55:05,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-12-15 16:55:05,608 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2023-12-15 16:55:05,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:55:05,609 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-12-15 16:55:05,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 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 16:55:05,609 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-12-15 16:55:05,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-15 16:55:05,610 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:55:05,610 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:55:05,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-15 16:55:05,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:05,815 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:55:05,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:55:05,816 INFO L85 PathProgramCache]: Analyzing trace with hash 2060541314, now seen corresponding path program 1 times [2023-12-15 16:55:05,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:55:05,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907913240] [2023-12-15 16:55:05,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:05,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:55:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-15 16:55:06,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:55:06,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907913240] [2023-12-15 16:55:06,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907913240] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 16:55:06,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193442348] [2023-12-15 16:55:06,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:06,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:06,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:55:06,077 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 16:55:06,105 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 16:55:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:06,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-15 16:55:06,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 16:55:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-15 16:55:06,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 16:55:06,573 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-15 16:55:06,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193442348] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 16:55:06,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 16:55:06,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-12-15 16:55:06,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133407436] [2023-12-15 16:55:06,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 16:55:06,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-15 16:55:06,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:55:06,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-15 16:55:06,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=640, Unknown=0, NotChecked=0, Total=1190 [2023-12-15 16:55:06,579 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 34 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:55:06,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:55:06,653 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2023-12-15 16:55:06,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-15 16:55:06,654 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 34 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-15 16:55:06,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:55:06,654 INFO L225 Difference]: With dead ends: 63 [2023-12-15 16:55:06,655 INFO L226 Difference]: Without dead ends: 47 [2023-12-15 16:55:06,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=550, Invalid=640, Unknown=0, NotChecked=0, Total=1190 [2023-12-15 16:55:06,656 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 16:55:06,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 62 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 16:55:06,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-15 16:55:06,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2023-12-15 16:55:06,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:55:06,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2023-12-15 16:55:06,664 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 26 [2023-12-15 16:55:06,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:55:06,664 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2023-12-15 16:55:06,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 34 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:55:06,664 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2023-12-15 16:55:06,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-15 16:55:06,665 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:55:06,665 INFO L195 NwaCegarLoop]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:55:06,676 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 16:55:06,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:06,875 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:55:06,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:55:06,875 INFO L85 PathProgramCache]: Analyzing trace with hash -278712638, now seen corresponding path program 2 times [2023-12-15 16:55:06,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:55:06,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522825933] [2023-12-15 16:55:06,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:06,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:55:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-15 16:55:07,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:55:07,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522825933] [2023-12-15 16:55:07,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522825933] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 16:55:07,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493499730] [2023-12-15 16:55:07,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 16:55:07,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:07,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:55:07,522 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 16:55:07,552 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 16:55:07,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 16:55:07,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 16:55:07,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-15 16:55:07,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 16:55:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-15 16:55:08,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 16:55:08,837 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-15 16:55:08,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493499730] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 16:55:08,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 16:55:08,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 70 [2023-12-15 16:55:08,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461542906] [2023-12-15 16:55:08,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 16:55:08,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-12-15 16:55:08,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:55:08,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-12-15 16:55:08,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2254, Invalid=2716, Unknown=0, NotChecked=0, Total=4970 [2023-12-15 16:55:08,842 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 71 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 70 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:55:08,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:55:08,952 INFO L93 Difference]: Finished difference Result 87 states and 117 transitions. [2023-12-15 16:55:08,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-15 16:55:08,952 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 70 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-12-15 16:55:08,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:55:08,953 INFO L225 Difference]: With dead ends: 87 [2023-12-15 16:55:08,953 INFO L226 Difference]: Without dead ends: 71 [2023-12-15 16:55:08,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2045 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2254, Invalid=2716, Unknown=0, NotChecked=0, Total=4970 [2023-12-15 16:55:08,956 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 16:55:08,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 88 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 16:55:08,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-15 16:55:08,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2023-12-15 16:55:08,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 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 16:55:08,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2023-12-15 16:55:08,965 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 38 [2023-12-15 16:55:08,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:55:08,965 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2023-12-15 16:55:08,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 70 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:55:08,965 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2023-12-15 16:55:08,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-15 16:55:08,967 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:55:08,967 INFO L195 NwaCegarLoop]: trace histogram [46, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:55:08,976 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 16:55:09,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:09,172 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:55:09,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:55:09,173 INFO L85 PathProgramCache]: Analyzing trace with hash 939995458, now seen corresponding path program 3 times [2023-12-15 16:55:09,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:55:09,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695026232] [2023-12-15 16:55:09,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:09,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:55:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-15 16:55:11,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:55:11,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695026232] [2023-12-15 16:55:11,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695026232] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 16:55:11,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211737636] [2023-12-15 16:55:11,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 16:55:11,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:11,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:55:11,046 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 16:55:11,051 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 16:55:11,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-15 16:55:11,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 16:55:11,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 16:55:11,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 16:55:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2023-12-15 16:55:11,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 16:55:11,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2023-12-15 16:55:11,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211737636] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 16:55:11,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 16:55:11,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 5, 5] total 56 [2023-12-15 16:55:11,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559817895] [2023-12-15 16:55:11,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 16:55:11,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-12-15 16:55:11,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:55:11,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-12-15 16:55:11,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1396, Invalid=1796, Unknown=0, NotChecked=0, Total=3192 [2023-12-15 16:55:11,531 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 57 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 56 states have internal predecessors, (86), 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 16:55:16,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:55:16,585 INFO L93 Difference]: Finished difference Result 435 states and 542 transitions. [2023-12-15 16:55:16,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2023-12-15 16:55:16,586 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 56 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2023-12-15 16:55:16,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:55:16,588 INFO L225 Difference]: With dead ends: 435 [2023-12-15 16:55:16,588 INFO L226 Difference]: Without dead ends: 419 [2023-12-15 16:55:16,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10609 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=12550, Invalid=27250, Unknown=0, NotChecked=0, Total=39800 [2023-12-15 16:55:16,602 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 979 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 16:55:16,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [979 Valid, 118 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 16:55:16,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2023-12-15 16:55:16,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 265. [2023-12-15 16:55:16,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.196969696969697) internal successors, (316), 264 states have internal predecessors, (316), 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 16:55:16,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 316 transitions. [2023-12-15 16:55:16,659 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 316 transitions. Word has length 62 [2023-12-15 16:55:16,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:55:16,659 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 316 transitions. [2023-12-15 16:55:16,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 56 states have internal predecessors, (86), 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 16:55:16,659 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 316 transitions. [2023-12-15 16:55:16,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-15 16:55:16,662 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:55:16,662 INFO L195 NwaCegarLoop]: trace histogram [49, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:55:16,670 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 16:55:16,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:16,867 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:55:16,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:55:16,867 INFO L85 PathProgramCache]: Analyzing trace with hash -2082833861, now seen corresponding path program 1 times [2023-12-15 16:55:16,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:55:16,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018399849] [2023-12-15 16:55:16,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:16,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:55:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:18,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-15 16:55:18,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:55:18,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018399849] [2023-12-15 16:55:18,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018399849] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 16:55:18,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756972429] [2023-12-15 16:55:18,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:18,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:18,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:55:18,762 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 16:55:18,763 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 16:55:18,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:18,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-15 16:55:18,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 16:55:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-15 16:55:20,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 16:55:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-15 16:55:22,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756972429] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 16:55:22,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 16:55:22,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 151 [2023-12-15 16:55:22,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518677922] [2023-12-15 16:55:22,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 16:55:22,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2023-12-15 16:55:22,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:55:22,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2023-12-15 16:55:22,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10300, Invalid=12652, Unknown=0, NotChecked=0, Total=22952 [2023-12-15 16:55:22,983 INFO L87 Difference]: Start difference. First operand 265 states and 316 transitions. Second operand has 152 states, 152 states have (on average 1.0921052631578947) internal successors, (166), 151 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 16:55:23,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:55:23,163 INFO L93 Difference]: Finished difference Result 538 states and 691 transitions. [2023-12-15 16:55:23,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-12-15 16:55:23,164 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 1.0921052631578947) internal successors, (166), 151 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 69 [2023-12-15 16:55:23,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:55:23,165 INFO L225 Difference]: With dead ends: 538 [2023-12-15 16:55:23,165 INFO L226 Difference]: Without dead ends: 324 [2023-12-15 16:55:23,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9848 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=10300, Invalid=12652, Unknown=0, NotChecked=0, Total=22952 [2023-12-15 16:55:23,169 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 16:55:23,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 40 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 16:55:23,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-12-15 16:55:23,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 316. [2023-12-15 16:55:23,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.1650793650793652) internal successors, (367), 315 states have internal predecessors, (367), 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 16:55:23,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 367 transitions. [2023-12-15 16:55:23,200 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 367 transitions. Word has length 69 [2023-12-15 16:55:23,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:55:23,201 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 367 transitions. [2023-12-15 16:55:23,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 1.0921052631578947) internal successors, (166), 151 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 16:55:23,201 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 367 transitions. [2023-12-15 16:55:23,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-12-15 16:55:23,202 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:55:23,203 INFO L195 NwaCegarLoop]: trace histogram [100, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:55:23,212 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 16:55:23,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:23,409 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:55:23,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:55:23,409 INFO L85 PathProgramCache]: Analyzing trace with hash -314447804, now seen corresponding path program 2 times [2023-12-15 16:55:23,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:55:23,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186570872] [2023-12-15 16:55:23,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:23,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:55:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:29,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5063 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-15 16:55:29,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:55:29,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186570872] [2023-12-15 16:55:29,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186570872] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 16:55:29,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200468237] [2023-12-15 16:55:29,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 16:55:29,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:29,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:55:29,412 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 16:55:29,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-15 16:55:29,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 16:55:29,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 16:55:29,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 103 conjunts are in the unsatisfiable core [2023-12-15 16:55:29,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 16:55:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5063 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-15 16:55:33,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 16:55:44,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5063 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-15 16:55:44,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200468237] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 16:55:44,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 16:55:44,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 304 [2023-12-15 16:55:44,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335301257] [2023-12-15 16:55:44,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 16:55:44,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 305 states [2023-12-15 16:55:44,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:55:44,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 305 interpolants. [2023-12-15 16:55:44,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41410, Invalid=51310, Unknown=0, NotChecked=0, Total=92720 [2023-12-15 16:55:44,950 INFO L87 Difference]: Start difference. First operand 316 states and 367 transitions. Second operand has 305 states, 305 states have (on average 1.0459016393442624) internal successors, (319), 304 states have internal predecessors, (319), 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 16:55:45,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:55:45,510 INFO L93 Difference]: Finished difference Result 640 states and 844 transitions. [2023-12-15 16:55:45,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2023-12-15 16:55:45,510 INFO L78 Accepts]: Start accepts. Automaton has has 305 states, 305 states have (on average 1.0459016393442624) internal successors, (319), 304 states have internal predecessors, (319), 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 120 [2023-12-15 16:55:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:55:45,512 INFO L225 Difference]: With dead ends: 640 [2023-12-15 16:55:45,512 INFO L226 Difference]: Without dead ends: 426 [2023-12-15 16:55:45,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40499 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=41410, Invalid=51310, Unknown=0, NotChecked=0, Total=92720 [2023-12-15 16:55:45,517 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 16:55:45,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 70 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 16:55:45,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2023-12-15 16:55:45,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 418. [2023-12-15 16:55:45,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.1247002398081534) internal successors, (469), 417 states have internal predecessors, (469), 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 16:55:45,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 469 transitions. [2023-12-15 16:55:45,552 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 469 transitions. Word has length 120 [2023-12-15 16:55:45,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:55:45,553 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 469 transitions. [2023-12-15 16:55:45,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 305 states, 305 states have (on average 1.0459016393442624) internal successors, (319), 304 states have internal predecessors, (319), 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 16:55:45,553 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 469 transitions. [2023-12-15 16:55:45,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-12-15 16:55:45,556 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:55:45,556 INFO L195 NwaCegarLoop]: trace histogram [202, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:55:45,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-15 16:55:45,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:45,762 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:55:45,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:55:45,763 INFO L85 PathProgramCache]: Analyzing trace with hash 2113666788, now seen corresponding path program 3 times [2023-12-15 16:55:45,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:55:45,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093600794] [2023-12-15 16:55:45,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:45,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:55:46,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2023-12-15 16:56:02,635 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 16:56:02,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-15 16:56:02,636 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 223 with TraceHistMax 202,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 172 known predicates. [2023-12-15 16:56:02,640 INFO L445 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1, 1, 1, 1] [2023-12-15 16:56:02,642 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 16:56:02,649 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 04:56:02 BoogieIcfgContainer [2023-12-15 16:56:02,649 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 16:56:02,649 INFO L158 Benchmark]: Toolchain (without parser) took 59740.45ms. Allocated memory was 266.3MB in the beginning and 1.2GB in the end (delta: 953.2MB). Free memory was 215.5MB in the beginning and 692.2MB in the end (delta: -476.6MB). Peak memory consumption was 477.6MB. Max. memory is 8.0GB. [2023-12-15 16:56:02,650 INFO L158 Benchmark]: CDTParser took 0.63ms. Allocated memory is still 211.8MB. Free memory is still 159.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 16:56:02,650 INFO L158 Benchmark]: CACSL2BoogieTranslator took 210.06ms. Allocated memory is still 266.3MB. Free memory was 215.0MB in the beginning and 204.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-15 16:56:02,650 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.05ms. Allocated memory is still 266.3MB. Free memory was 204.0MB in the beginning and 202.9MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-15 16:56:02,650 INFO L158 Benchmark]: Boogie Preprocessor took 41.68ms. Allocated memory is still 266.3MB. Free memory was 202.4MB in the beginning and 200.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 16:56:02,650 INFO L158 Benchmark]: RCFGBuilder took 392.88ms. Allocated memory is still 266.3MB. Free memory was 200.9MB in the beginning and 187.8MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-15 16:56:02,651 INFO L158 Benchmark]: TraceAbstraction took 59059.64ms. Allocated memory was 266.3MB in the beginning and 1.2GB in the end (delta: 953.2MB). Free memory was 187.2MB in the beginning and 692.2MB in the end (delta: -504.9MB). Peak memory consumption was 449.3MB. Max. memory is 8.0GB. [2023-12-15 16:56:02,653 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.63ms. Allocated memory is still 211.8MB. Free memory is still 159.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 210.06ms. Allocated memory is still 266.3MB. Free memory was 215.0MB in the beginning and 204.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 31.05ms. Allocated memory is still 266.3MB. Free memory was 204.0MB in the beginning and 202.9MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 41.68ms. Allocated memory is still 266.3MB. Free memory was 202.4MB in the beginning and 200.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 392.88ms. Allocated memory is still 266.3MB. Free memory was 200.9MB in the beginning and 187.8MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 59059.64ms. Allocated memory was 266.3MB in the beginning and 1.2GB in the end (delta: 953.2MB). Free memory was 187.2MB in the beginning and 692.2MB in the end (delta: -504.9MB). Peak memory consumption was 449.3MB. 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: 4]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 4). Cancelled while NwaCegarLoop was analyzing trace of length 223 with TraceHistMax 202,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 172 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 59.0s, OverallIterations: 11, TraceHistogramMax: 202, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 6.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1119 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1119 mSDsluCounter, 535 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 409 mSDsCounter, 420 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1378 IncrementalHoareTripleChecker+Invalid, 1798 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 420 mSolverCounterUnsat, 126 mSDtfsCounter, 1378 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1094 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 789 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63508 ImplicationChecksByTransitivity, 30.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=418occurred in iteration=10, InterpolantAutomatonStates: 567, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 223 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 32.4s InterpolantComputationTime, 730 NumberOfCodeBlocks, 688 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1055 ConstructedInterpolants, 0 QuantifiedInterpolants, 4290 SizeOfPredicates, 16 NumberOfNonLiveVariables, 2326 ConjunctsInSsa, 210 ConjunctsInUnsatCore, 24 InterpolantComputations, 3 PerfectInterpolantSequences, 2311/23175 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