/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/sorting_bubblesort_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 16:55:00,735 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 16:55:00,776 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 16:55:00,779 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 16:55:00,779 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 16:55:00,793 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 16:55:00,793 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 16:55:00,794 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 16:55:00,794 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 16:55:00,794 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 16:55:00,795 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 16:55:00,795 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 16:55:00,795 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 16:55:00,795 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 16:55:00,796 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 16:55:00,796 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 16:55:00,796 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 16:55:00,796 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 16:55:00,797 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 16:55:00,797 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 16:55:00,797 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 16:55:00,805 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 16:55:00,805 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 16:55:00,806 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 16:55:00,806 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 16:55:00,806 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 16:55:00,806 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 16:55:00,806 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 16:55:00,807 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 16:55:00,807 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 16:55:00,807 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 16:55:00,807 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 16:55:00,807 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 16:55:00,808 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 16:55:00,808 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 16:55:00,808 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 16:55:00,808 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 16:55:00,809 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 16:55:00,809 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 16:55:00,809 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 16:55:00,809 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 16:55:00,810 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 16:55:00,810 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 16:55:00,810 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 16:55:01,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 16:55:01,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 16:55:01,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 16:55:01,018 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 16:55:01,019 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 16:55:01,020 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-2.i [2023-12-15 16:55:01,995 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 16:55:02,157 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 16:55:02,158 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-2.i [2023-12-15 16:55:02,162 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c46568b95/2b6c6ec94fb9407fab9e844ef14de575/FLAG2f1d17fe1 [2023-12-15 16:55:02,171 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c46568b95/2b6c6ec94fb9407fab9e844ef14de575 [2023-12-15 16:55:02,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 16:55:02,174 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 16:55:02,175 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 16:55:02,175 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 16:55:02,178 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 16:55:02,178 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 04:55:02" (1/1) ... [2023-12-15 16:55:02,179 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e4f8add 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 16:55:02,179 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 04:55:02" (1/1) ... [2023-12-15 16:55:02,194 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 16:55:02,290 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/sorting_bubblesort_ground-2.i[820,833] [2023-12-15 16:55:02,310 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 16:55:02,316 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 16:55:02,328 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/sorting_bubblesort_ground-2.i[820,833] [2023-12-15 16:55:02,352 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 16:55:02,362 INFO L206 MainTranslator]: Completed translation [2023-12-15 16:55:02,364 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:02 WrapperNode [2023-12-15 16:55:02,364 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 16:55:02,365 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 16:55:02,365 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 16:55:02,366 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 16:55:02,371 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:02" (1/1) ... [2023-12-15 16:55:02,381 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:02" (1/1) ... [2023-12-15 16:55:02,405 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2023-12-15 16:55:02,406 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 16:55:02,406 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 16:55:02,406 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 16:55:02,406 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 16:55:02,414 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:02" (1/1) ... [2023-12-15 16:55:02,414 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:02" (1/1) ... [2023-12-15 16:55:02,417 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:02" (1/1) ... [2023-12-15 16:55:02,429 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2023-12-15 16:55:02,430 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:02" (1/1) ... [2023-12-15 16:55:02,430 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:02" (1/1) ... [2023-12-15 16:55:02,441 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:02" (1/1) ... [2023-12-15 16:55:02,444 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:02" (1/1) ... [2023-12-15 16:55:02,448 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:02" (1/1) ... [2023-12-15 16:55:02,449 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:02" (1/1) ... [2023-12-15 16:55:02,450 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 16:55:02,451 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 16:55:02,451 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 16:55:02,451 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 16:55:02,452 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:02" (1/1) ... [2023-12-15 16:55:02,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 16:55:02,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:55:02,490 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 16:55:02,511 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 16:55:02,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 16:55:02,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 16:55:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-15 16:55:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-15 16:55:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-15 16:55:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-15 16:55:02,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 16:55:02,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 16:55:02,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-15 16:55:02,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-15 16:55:02,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-15 16:55:02,585 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 16:55:02,587 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 16:55:02,705 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 16:55:02,721 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 16:55:02,722 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-12-15 16:55:02,722 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 04:55:02 BoogieIcfgContainer [2023-12-15 16:55:02,722 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 16:55:02,724 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 16:55:02,724 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 16:55:02,726 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 16:55:02,726 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 04:55:02" (1/3) ... [2023-12-15 16:55:02,726 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ff6792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 04:55:02, skipping insertion in model container [2023-12-15 16:55:02,726 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:55:02" (2/3) ... [2023-12-15 16:55:02,727 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ff6792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 04:55:02, skipping insertion in model container [2023-12-15 16:55:02,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 04:55:02" (3/3) ... [2023-12-15 16:55:02,727 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-2.i [2023-12-15 16:55:02,739 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 16:55:02,739 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 16:55:02,768 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 16:55:02,772 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;@5f3612f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 16:55:02,772 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 16:55:02,775 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 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 16:55:02,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-15 16:55:02,779 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:55:02,779 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:55:02,780 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:55:02,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:55:02,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1612111142, now seen corresponding path program 1 times [2023-12-15 16:55:02,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:55:02,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384850410] [2023-12-15 16:55:02,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:02,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:55:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:02,952 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 16:55:02,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:55:02,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384850410] [2023-12-15 16:55:02,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384850410] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 16:55:02,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 16:55:02,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 16:55:02,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784484801] [2023-12-15 16:55:02,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 16:55:02,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 16:55:02,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:55:02,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 16:55:02,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 16:55:02,987 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 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 16:55:03,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:55:03,027 INFO L93 Difference]: Finished difference Result 35 states and 57 transitions. [2023-12-15 16:55:03,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 16:55:03,029 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 16:55:03,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:55:03,035 INFO L225 Difference]: With dead ends: 35 [2023-12-15 16:55:03,035 INFO L226 Difference]: Without dead ends: 17 [2023-12-15 16:55:03,037 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 16:55:03,041 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 16:55:03,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 16:55:03,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-15 16:55:03,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-15 16:55:03,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 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 16:55:03,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2023-12-15 16:55:03,066 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2023-12-15 16:55:03,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:55:03,067 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2023-12-15 16:55:03,067 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 16:55:03,067 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2023-12-15 16:55:03,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-15 16:55:03,067 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:55:03,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:55:03,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-15 16:55:03,068 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:55:03,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:55:03,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1371244853, now seen corresponding path program 1 times [2023-12-15 16:55:03,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:55:03,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687471376] [2023-12-15 16:55:03,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:03,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:55:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 16:55:03,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:55:03,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687471376] [2023-12-15 16:55:03,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687471376] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 16:55:03,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33072451] [2023-12-15 16:55:03,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:03,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:03,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:55:03,204 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 16:55:03,210 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 16:55:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:03,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 16:55:03,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 16:55:03,286 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 16:55:03,286 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 16:55:03,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33072451] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 16:55:03,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 16:55:03,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-15 16:55:03,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202272283] [2023-12-15 16:55:03,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 16:55:03,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 16:55:03,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:55:03,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 16:55:03,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-15 16:55:03,291 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) 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 16:55:03,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:55:03,314 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2023-12-15 16:55:03,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 16:55:03,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) 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 16:55:03,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:55:03,316 INFO L225 Difference]: With dead ends: 30 [2023-12-15 16:55:03,316 INFO L226 Difference]: Without dead ends: 22 [2023-12-15 16:55:03,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-15 16:55:03,318 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 16:55:03,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 36 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 16:55:03,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-15 16:55:03,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-15 16:55:03,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 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 16:55:03,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2023-12-15 16:55:03,326 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 10 [2023-12-15 16:55:03,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:55:03,327 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2023-12-15 16:55:03,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) 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 16:55:03,327 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2023-12-15 16:55:03,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-15 16:55:03,328 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:55:03,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:55:03,336 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 16:55:03,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:03,536 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:55:03,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:55:03,536 INFO L85 PathProgramCache]: Analyzing trace with hash 810154115, now seen corresponding path program 1 times [2023-12-15 16:55:03,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:55:03,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4477790] [2023-12-15 16:55:03,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:03,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:55:03,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:03,614 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 16:55:03,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:55:03,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4477790] [2023-12-15 16:55:03,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4477790] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 16:55:03,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636544899] [2023-12-15 16:55:03,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:03,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:03,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:55:03,620 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 16:55:03,660 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 16:55:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:03,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 16:55:03,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 16:55:03,693 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 16:55:03,693 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 16:55:03,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636544899] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 16:55:03,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 16:55:03,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-15 16:55:03,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583390574] [2023-12-15 16:55:03,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 16:55:03,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 16:55:03,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:55:03,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 16:55:03,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-15 16:55:03,695 INFO L87 Difference]: Start difference. First operand 22 states and 29 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 16:55:03,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:55:03,714 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2023-12-15 16:55:03,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 16:55:03,714 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 16:55:03,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:55:03,715 INFO L225 Difference]: With dead ends: 44 [2023-12-15 16:55:03,715 INFO L226 Difference]: Without dead ends: 26 [2023-12-15 16:55:03,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-15 16:55:03,718 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 16:55:03,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 16:55:03,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-15 16:55:03,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-12-15 16:55:03,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 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 16:55:03,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2023-12-15 16:55:03,724 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 13 [2023-12-15 16:55:03,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:55:03,724 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2023-12-15 16:55:03,725 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 16:55:03,725 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2023-12-15 16:55:03,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-15 16:55:03,726 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:55:03,726 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:55:03,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-15 16:55:03,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-12-15 16:55:03,931 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:55:03,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:55:03,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1552667997, now seen corresponding path program 1 times [2023-12-15 16:55:03,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:55:03,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56986849] [2023-12-15 16:55:03,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:03,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:55:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 16:55:03,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:55:03,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56986849] [2023-12-15 16:55:03,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56986849] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 16:55:03,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688520927] [2023-12-15 16:55:03,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:03,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:03,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:55:03,991 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 16:55:04,025 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 16:55:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:04,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-15 16:55:04,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 16:55:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 16:55:04,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 16:55:04,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 16:55:04,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688520927] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 16:55:04,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 16:55:04,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-12-15 16:55:04,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872377659] [2023-12-15 16:55:04,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 16:55:04,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 16:55:04,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:55:04,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 16:55:04,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-15 16:55:04,142 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:55:04,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:55:04,183 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2023-12-15 16:55:04,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 16:55:04,183 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-15 16:55:04,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:55:04,184 INFO L225 Difference]: With dead ends: 46 [2023-12-15 16:55:04,184 INFO L226 Difference]: Without dead ends: 26 [2023-12-15 16:55:04,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-15 16:55:04,184 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 16:55:04,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 16:55:04,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-15 16:55:04,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-15 16:55:04,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 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 16:55:04,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-12-15 16:55:04,187 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 16 [2023-12-15 16:55:04,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:55:04,188 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-12-15 16:55:04,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:55:04,188 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-12-15 16:55:04,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-15 16:55:04,188 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:55:04,188 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:55:04,195 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 16:55:04,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:04,389 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:55:04,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:55:04,390 INFO L85 PathProgramCache]: Analyzing trace with hash -190909954, now seen corresponding path program 2 times [2023-12-15 16:55:04,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:55:04,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608659733] [2023-12-15 16:55:04,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:04,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:55:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:04,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-15 16:55:04,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:55:04,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608659733] [2023-12-15 16:55:04,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608659733] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 16:55:04,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626046481] [2023-12-15 16:55:04,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 16:55:04,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:04,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:55:04,434 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 16:55:04,440 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 16:55:04,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 16:55:04,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 16:55:04,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 16:55:04,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 16:55:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 16:55:04,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 16:55:04,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 16:55:04,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626046481] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 16:55:04,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 16:55:04,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-12-15 16:55:04,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365810823] [2023-12-15 16:55:04,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 16:55:04,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-15 16:55:04,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:55:04,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-15 16:55:04,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-15 16:55:04,607 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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 16:55:04,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:55:04,660 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2023-12-15 16:55:04,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-15 16:55:04,661 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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 19 [2023-12-15 16:55:04,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:55:04,661 INFO L225 Difference]: With dead ends: 61 [2023-12-15 16:55:04,662 INFO L226 Difference]: Without dead ends: 41 [2023-12-15 16:55:04,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-15 16:55:04,662 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 16:55:04,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 80 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 16:55:04,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-12-15 16:55:04,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2023-12-15 16:55:04,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 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 16:55:04,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2023-12-15 16:55:04,672 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 19 [2023-12-15 16:55:04,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:55:04,672 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2023-12-15 16:55:04,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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 16:55:04,672 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2023-12-15 16:55:04,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-15 16:55:04,673 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:55:04,673 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:55:04,680 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 16:55:04,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:04,877 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:55:04,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:55:04,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1522098536, now seen corresponding path program 3 times [2023-12-15 16:55:04,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:55:04,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839908150] [2023-12-15 16:55:04,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:04,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:55:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-15 16:55:04,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:55:04,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839908150] [2023-12-15 16:55:04,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839908150] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 16:55:04,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149448846] [2023-12-15 16:55:04,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 16:55:04,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:04,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:55:04,987 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 16:55:05,013 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 16:55:05,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-15 16:55:05,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 16:55:05,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 16:55:05,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 16:55:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-15 16:55:05,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 16:55:05,099 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-15 16:55:05,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149448846] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 16:55:05,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 16:55:05,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-12-15 16:55:05,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125720008] [2023-12-15 16:55:05,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 16:55:05,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-15 16:55:05,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:55:05,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-15 16:55:05,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-12-15 16:55:05,101 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 16:55:05,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:55:05,135 INFO L93 Difference]: Finished difference Result 85 states and 116 transitions. [2023-12-15 16:55:05,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 16:55:05,137 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) Word has length 28 [2023-12-15 16:55:05,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:55:05,138 INFO L225 Difference]: With dead ends: 85 [2023-12-15 16:55:05,138 INFO L226 Difference]: Without dead ends: 61 [2023-12-15 16:55:05,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-12-15 16:55:05,139 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 16:55:05,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 42 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 16:55:05,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-15 16:55:05,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-12-15 16:55:05,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 60 states have internal predecessors, (77), 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 16:55:05,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2023-12-15 16:55:05,149 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 28 [2023-12-15 16:55:05,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:55:05,150 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2023-12-15 16:55:05,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 16:55:05,150 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2023-12-15 16:55:05,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-15 16:55:05,151 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:55:05,151 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:55:05,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-15 16:55:05,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:05,356 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:55:05,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:55:05,356 INFO L85 PathProgramCache]: Analyzing trace with hash -302265880, now seen corresponding path program 4 times [2023-12-15 16:55:05,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:55:05,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980207129] [2023-12-15 16:55:05,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:05,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:55:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:05,529 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-15 16:55:05,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:55:05,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980207129] [2023-12-15 16:55:05,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980207129] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 16:55:05,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451388006] [2023-12-15 16:55:05,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 16:55:05,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:05,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:55:05,531 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 16:55:05,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-15 16:55:05,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 16:55:05,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 16:55:05,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-15 16:55:05,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 16:55:05,694 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-15 16:55:05,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 16:55:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-15 16:55:05,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451388006] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 16:55:05,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 16:55:05,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 27 [2023-12-15 16:55:05,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366732531] [2023-12-15 16:55:05,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 16:55:05,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-15 16:55:05,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:55:05,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-15 16:55:05,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2023-12-15 16:55:05,816 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 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 16:55:05,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:55:05,895 INFO L93 Difference]: Finished difference Result 159 states and 223 transitions. [2023-12-15 16:55:05,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-15 16:55:05,895 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 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 40 [2023-12-15 16:55:05,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:55:05,899 INFO L225 Difference]: With dead ends: 159 [2023-12-15 16:55:05,899 INFO L226 Difference]: Without dead ends: 110 [2023-12-15 16:55:05,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2023-12-15 16:55:05,901 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 16:55:05,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 89 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 16:55:05,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-12-15 16:55:05,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2023-12-15 16:55:05,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 109 states have internal predecessors, (142), 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 16:55:05,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 142 transitions. [2023-12-15 16:55:05,918 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 142 transitions. Word has length 40 [2023-12-15 16:55:05,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:55:05,918 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 142 transitions. [2023-12-15 16:55:05,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 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 16:55:05,918 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 142 transitions. [2023-12-15 16:55:05,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-15 16:55:05,920 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:55:05,921 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:55:05,925 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 16:55:06,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:06,125 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:55:06,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:55:06,126 INFO L85 PathProgramCache]: Analyzing trace with hash 299109283, now seen corresponding path program 5 times [2023-12-15 16:55:06,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:55:06,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961682869] [2023-12-15 16:55:06,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:06,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:55:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-12-15 16:55:06,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:55:06,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961682869] [2023-12-15 16:55:06,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961682869] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 16:55:06,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727931941] [2023-12-15 16:55:06,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 16:55:06,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:06,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:55:06,313 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 16:55:06,336 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 16:55:06,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-12-15 16:55:06,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 16:55:06,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-15 16:55:06,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 16:55:06,631 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-15 16:55:06,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 16:55:06,989 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-15 16:55:06,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727931941] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 16:55:06,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 16:55:06,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 44 [2023-12-15 16:55:06,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558969766] [2023-12-15 16:55:06,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 16:55:06,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-15 16:55:06,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:55:06,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-15 16:55:06,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=1306, Unknown=0, NotChecked=0, Total=1892 [2023-12-15 16:55:06,992 INFO L87 Difference]: Start difference. First operand 110 states and 142 transitions. Second operand has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:55:07,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:55:07,121 INFO L93 Difference]: Finished difference Result 304 states and 432 transitions. [2023-12-15 16:55:07,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-15 16:55:07,122 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-12-15 16:55:07,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:55:07,123 INFO L225 Difference]: With dead ends: 304 [2023-12-15 16:55:07,123 INFO L226 Difference]: Without dead ends: 207 [2023-12-15 16:55:07,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=586, Invalid=1306, Unknown=0, NotChecked=0, Total=1892 [2023-12-15 16:55:07,124 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 89 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 16:55:07,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 166 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 16:55:07,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-12-15 16:55:07,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2023-12-15 16:55:07,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.3155339805825244) internal successors, (271), 206 states have internal predecessors, (271), 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 16:55:07,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 271 transitions. [2023-12-15 16:55:07,131 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 271 transitions. Word has length 65 [2023-12-15 16:55:07,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:55:07,131 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 271 transitions. [2023-12-15 16:55:07,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:55:07,131 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 271 transitions. [2023-12-15 16:55:07,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-15 16:55:07,133 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:55:07,133 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:55:07,164 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 16:55:07,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:07,337 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:55:07,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:55:07,338 INFO L85 PathProgramCache]: Analyzing trace with hash -683125688, now seen corresponding path program 6 times [2023-12-15 16:55:07,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:55:07,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871153350] [2023-12-15 16:55:07,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:07,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:55:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1414 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-12-15 16:55:07,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:55:07,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871153350] [2023-12-15 16:55:07,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871153350] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 16:55:07,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772352447] [2023-12-15 16:55:07,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-15 16:55:07,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:07,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:55:07,544 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 16:55:07,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-15 16:55:07,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-12-15 16:55:07,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 16:55:07,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-15 16:55:07,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 16:55:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1414 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-12-15 16:55:07,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 16:55:07,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1414 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-12-15 16:55:07,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772352447] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 16:55:07,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 16:55:07,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2023-12-15 16:55:07,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041975616] [2023-12-15 16:55:07,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 16:55:07,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-15 16:55:07,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:55:07,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-15 16:55:07,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2023-12-15 16:55:07,979 INFO L87 Difference]: Start difference. First operand 207 states and 271 transitions. Second operand has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 28 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 16:55:08,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:55:08,010 INFO L93 Difference]: Finished difference Result 414 states and 555 transitions. [2023-12-15 16:55:08,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-15 16:55:08,010 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 28 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) Word has length 114 [2023-12-15 16:55:08,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:55:08,011 INFO L225 Difference]: With dead ends: 414 [2023-12-15 16:55:08,011 INFO L226 Difference]: Without dead ends: 221 [2023-12-15 16:55:08,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2023-12-15 16:55:08,015 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 16:55:08,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 16:55:08,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-12-15 16:55:08,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2023-12-15 16:55:08,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.2954545454545454) internal successors, (285), 220 states have internal predecessors, (285), 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 16:55:08,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 285 transitions. [2023-12-15 16:55:08,020 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 285 transitions. Word has length 114 [2023-12-15 16:55:08,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:55:08,021 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 285 transitions. [2023-12-15 16:55:08,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 28 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 16:55:08,021 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 285 transitions. [2023-12-15 16:55:08,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-15 16:55:08,022 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:55:08,022 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:55:08,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-15 16:55:08,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-12-15 16:55:08,227 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:55:08,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:55:08,227 INFO L85 PathProgramCache]: Analyzing trace with hash 544708584, now seen corresponding path program 7 times [2023-12-15 16:55:08,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:55:08,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973043498] [2023-12-15 16:55:08,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:08,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:55:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1687 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-12-15 16:55:08,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:55:08,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973043498] [2023-12-15 16:55:08,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973043498] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 16:55:08,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82592068] [2023-12-15 16:55:08,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-15 16:55:08,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:08,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:55:08,901 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 16:55:08,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-15 16:55:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:09,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-15 16:55:09,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 16:55:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1687 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-12-15 16:55:09,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 16:55:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1687 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-12-15 16:55:09,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82592068] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 16:55:09,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 16:55:09,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 56 [2023-12-15 16:55:09,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700482864] [2023-12-15 16:55:09,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 16:55:09,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-12-15 16:55:09,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:55:09,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-12-15 16:55:09,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2023-12-15 16:55:09,823 INFO L87 Difference]: Start difference. First operand 221 states and 285 transitions. Second operand has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 56 states have internal predecessors, (71), 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 16:55:09,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:55:09,876 INFO L93 Difference]: Finished difference Result 442 states and 597 transitions. [2023-12-15 16:55:09,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-12-15 16:55:09,877 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 56 states have internal predecessors, (71), 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 128 [2023-12-15 16:55:09,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:55:09,877 INFO L225 Difference]: With dead ends: 442 [2023-12-15 16:55:09,878 INFO L226 Difference]: Without dead ends: 249 [2023-12-15 16:55:09,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2023-12-15 16:55:09,879 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 16:55:09,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 162 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 16:55:09,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-12-15 16:55:09,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2023-12-15 16:55:09,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.2620967741935485) internal successors, (313), 248 states have internal predecessors, (313), 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 16:55:09,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 313 transitions. [2023-12-15 16:55:09,884 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 313 transitions. Word has length 128 [2023-12-15 16:55:09,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:55:09,885 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 313 transitions. [2023-12-15 16:55:09,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 56 states have internal predecessors, (71), 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 16:55:09,885 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 313 transitions. [2023-12-15 16:55:09,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-12-15 16:55:09,886 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:55:09,886 INFO L195 NwaCegarLoop]: trace histogram [54, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:55:09,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-15 16:55:10,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-15 16:55:10,091 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:55:10,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:55:10,091 INFO L85 PathProgramCache]: Analyzing trace with hash 952342312, now seen corresponding path program 8 times [2023-12-15 16:55:10,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:55:10,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36241170] [2023-12-15 16:55:10,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:10,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:55:10,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:11,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2821 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-12-15 16:55:11,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:55:11,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36241170] [2023-12-15 16:55:11,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36241170] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 16:55:11,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636302481] [2023-12-15 16:55:11,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 16:55:11,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:11,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:55:11,937 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 16:55:11,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-15 16:55:12,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 16:55:12,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 16:55:12,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-15 16:55:12,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 16:55:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2821 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-12-15 16:55:12,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 16:55:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2821 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-12-15 16:55:14,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636302481] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 16:55:14,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 16:55:14,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 112 [2023-12-15 16:55:14,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569888531] [2023-12-15 16:55:14,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 16:55:14,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2023-12-15 16:55:14,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:55:14,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2023-12-15 16:55:14,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2023-12-15 16:55:14,977 INFO L87 Difference]: Start difference. First operand 249 states and 313 transitions. Second operand has 113 states, 113 states have (on average 1.1238938053097345) internal successors, (127), 112 states have internal predecessors, (127), 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 16:55:15,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:55:15,078 INFO L93 Difference]: Finished difference Result 498 states and 681 transitions. [2023-12-15 16:55:15,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-12-15 16:55:15,078 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.1238938053097345) internal successors, (127), 112 states have internal predecessors, (127), 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 156 [2023-12-15 16:55:15,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:55:15,079 INFO L225 Difference]: With dead ends: 498 [2023-12-15 16:55:15,079 INFO L226 Difference]: Without dead ends: 305 [2023-12-15 16:55:15,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2023-12-15 16:55:15,082 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 16:55:15,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 16:55:15,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-12-15 16:55:15,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2023-12-15 16:55:15,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.2138157894736843) internal successors, (369), 304 states have internal predecessors, (369), 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 16:55:15,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 369 transitions. [2023-12-15 16:55:15,089 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 369 transitions. Word has length 156 [2023-12-15 16:55:15,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:55:15,089 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 369 transitions. [2023-12-15 16:55:15,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.1238938053097345) internal successors, (127), 112 states have internal predecessors, (127), 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 16:55:15,089 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 369 transitions. [2023-12-15 16:55:15,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-12-15 16:55:15,090 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:55:15,090 INFO L195 NwaCegarLoop]: trace histogram [110, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:55:15,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-15 16:55:15,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-15 16:55:15,295 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:55:15,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:55:15,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1066830424, now seen corresponding path program 9 times [2023-12-15 16:55:15,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:55:15,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082839922] [2023-12-15 16:55:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:55:15,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:55:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:55:21,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7441 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-12-15 16:55:21,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:55:21,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082839922] [2023-12-15 16:55:21,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082839922] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 16:55:21,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895518367] [2023-12-15 16:55:21,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 16:55:21,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:55:21,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:55:21,137 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 16:55:21,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process Received shutdown request... [2023-12-15 16:56:16,624 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 16:56:16,624 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 16:56:17,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 [2023-12-15 16:56:17,825 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forcibly destroying the process [2023-12-15 16:56:17,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 137 [2023-12-15 16:56:17,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 16:56:17,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-15 16:56:17,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2023-12-15 16:56:17,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096805264] [2023-12-15 16:56:17,834 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-15 16:56:17,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2023-12-15 16:56:17,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:56:17,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2023-12-15 16:56:17,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2023-12-15 16:56:17,838 INFO L87 Difference]: Start difference. First operand 305 states and 369 transitions. Second operand has 113 states, 113 states have (on average 1.1061946902654867) internal successors, (125), 112 states have internal predecessors, (125), 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 16:56:17,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-15 16:56:17,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2023-12-15 16:56:17,841 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 16:56:17,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 16:56:17,842 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 16:56:17,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-15 16:56:17,843 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (305states) and FLOYD_HOARE automaton (currently 2 states, 113 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). [2023-12-15 16:56:17,846 INFO L445 BasicCegarLoop]: Path program histogram: [9, 1, 1, 1] [2023-12-15 16:56:17,847 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 16:56:17,848 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 04:56:17 BoogieIcfgContainer [2023-12-15 16:56:17,848 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 16:56:17,849 INFO L158 Benchmark]: Toolchain (without parser) took 75674.98ms. Allocated memory was 255.9MB in the beginning and 599.8MB in the end (delta: 343.9MB). Free memory was 219.8MB in the beginning and 518.5MB in the end (delta: -298.8MB). Peak memory consumption was 46.2MB. Max. memory is 8.0GB. [2023-12-15 16:56:17,849 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 255.9MB. Free memory was 204.0MB in the beginning and 203.8MB in the end (delta: 150.4kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 16:56:17,849 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.07ms. Allocated memory is still 255.9MB. Free memory was 219.4MB in the beginning and 208.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-15 16:56:17,849 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.38ms. Allocated memory is still 255.9MB. Free memory was 208.5MB in the beginning and 206.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 16:56:17,849 INFO L158 Benchmark]: Boogie Preprocessor took 44.19ms. Allocated memory is still 255.9MB. Free memory was 206.8MB in the beginning and 204.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 16:56:17,849 INFO L158 Benchmark]: RCFGBuilder took 271.33ms. Allocated memory is still 255.9MB. Free memory was 204.7MB in the beginning and 192.5MB in the end (delta: 12.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-15 16:56:17,850 INFO L158 Benchmark]: TraceAbstraction took 75124.81ms. Allocated memory was 255.9MB in the beginning and 599.8MB in the end (delta: 343.9MB). Free memory was 191.8MB in the beginning and 518.5MB in the end (delta: -326.7MB). Peak memory consumption was 17.9MB. Max. memory is 8.0GB. [2023-12-15 16:56:17,850 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 255.9MB. Free memory was 204.0MB in the beginning and 203.8MB in the end (delta: 150.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 190.07ms. Allocated memory is still 255.9MB. Free memory was 219.4MB in the beginning and 208.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 40.38ms. Allocated memory is still 255.9MB. Free memory was 208.5MB in the beginning and 206.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 44.19ms. Allocated memory is still 255.9MB. Free memory was 206.8MB in the beginning and 204.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 271.33ms. Allocated memory is still 255.9MB. Free memory was 204.7MB in the beginning and 192.5MB in the end (delta: 12.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 75124.81ms. Allocated memory was 255.9MB in the beginning and 599.8MB in the end (delta: 343.9MB). Free memory was 191.8MB in the beginning and 518.5MB in the end (delta: -326.7MB). Peak memory consumption was 17.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 13). Cancelled while NwaCegarLoop was constructing difference of abstraction (305states) and FLOYD_HOARE automaton (currently 2 states, 113 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 75.1s, OverallIterations: 12, TraceHistogramMax: 110, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 162 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 162 mSDsluCounter, 820 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 632 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 622 IncrementalHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 188 mSDtfsCounter, 622 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1392 GetRequests, 990 SyntacticMatches, 0 SemanticMatches, 402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 9.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=305occurred in iteration=11, InterpolantAutomatonStates: 304, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 7 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 13.9s InterpolantComputationTime, 1399 NumberOfCodeBlocks, 1329 NumberOfCodeBlocksAsserted, 54 NumberOfCheckSat, 1935 ConstructedInterpolants, 0 QuantifiedInterpolants, 3117 SizeOfPredicates, 0 NumberOfNonLiveVariables, 2436 ConjunctsInSsa, 139 ConjunctsInUnsatCore, 30 InterpolantComputations, 3 PerfectInterpolantSequences, 14139/26824 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