/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 13:26:35,542 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 13:26:35,617 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 13:26:35,621 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 13:26:35,621 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 13:26:35,644 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 13:26:35,645 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 13:26:35,645 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 13:26:35,645 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 13:26:35,648 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 13:26:35,648 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 13:26:35,649 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 13:26:35,649 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 13:26:35,650 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 13:26:35,650 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 13:26:35,650 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 13:26:35,651 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 13:26:35,651 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 13:26:35,651 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 13:26:35,651 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 13:26:35,651 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 13:26:35,651 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 13:26:35,652 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 13:26:35,652 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 13:26:35,652 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 13:26:35,652 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 13:26:35,652 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 13:26:35,652 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 13:26:35,653 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 13:26:35,653 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 13:26:35,653 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 13:26:35,654 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 13:26:35,654 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 13:26:35,654 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 13:26:35,654 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 13:26:35,654 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 13:26:35,654 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 13:26:35,654 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 13:26:35,654 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 13:26:35,655 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 13:26:35,655 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 13:26:35,655 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 13:26:35,655 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 13:26:35,655 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 13:26:35,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 13:26:35,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 13:26:35,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 13:26:35,863 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 13:26:35,864 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 13:26:35,864 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-12-21 13:26:36,908 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 13:26:37,061 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 13:26:37,061 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-12-21 13:26:37,068 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b95e67b81/c355215d13ad4531bb3814d86a04c346/FLAG1ab49da7f [2023-12-21 13:26:37,077 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b95e67b81/c355215d13ad4531bb3814d86a04c346 [2023-12-21 13:26:37,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 13:26:37,083 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 13:26:37,083 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 13:26:37,084 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 13:26:37,089 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 13:26:37,089 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:26:37" (1/1) ... [2023-12-21 13:26:37,090 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36892bc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:37, skipping insertion in model container [2023-12-21 13:26:37,090 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:26:37" (1/1) ... [2023-12-21 13:26:37,134 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 13:26:37,270 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5377,5390] [2023-12-21 13:26:37,295 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 13:26:37,305 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 13:26:37,332 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5377,5390] [2023-12-21 13:26:37,342 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 13:26:37,357 INFO L206 MainTranslator]: Completed translation [2023-12-21 13:26:37,357 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:37 WrapperNode [2023-12-21 13:26:37,357 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 13:26:37,358 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 13:26:37,358 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 13:26:37,358 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 13:26:37,363 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:37" (1/1) ... [2023-12-21 13:26:37,371 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:37" (1/1) ... [2023-12-21 13:26:37,404 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 444 [2023-12-21 13:26:37,404 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 13:26:37,405 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 13:26:37,405 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 13:26:37,405 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 13:26:37,414 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:37" (1/1) ... [2023-12-21 13:26:37,414 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:37" (1/1) ... [2023-12-21 13:26:37,416 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:37" (1/1) ... [2023-12-21 13:26:37,428 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-21 13:26:37,428 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:37" (1/1) ... [2023-12-21 13:26:37,428 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:37" (1/1) ... [2023-12-21 13:26:37,433 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:37" (1/1) ... [2023-12-21 13:26:37,461 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:37" (1/1) ... [2023-12-21 13:26:37,462 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:37" (1/1) ... [2023-12-21 13:26:37,464 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:37" (1/1) ... [2023-12-21 13:26:37,466 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 13:26:37,467 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 13:26:37,468 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 13:26:37,468 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 13:26:37,468 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:37" (1/1) ... [2023-12-21 13:26:37,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 13:26:37,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 13:26:37,494 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) [2023-12-21 13:26:37,518 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 [2023-12-21 13:26:37,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 13:26:37,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 13:26:37,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 13:26:37,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 13:26:37,624 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 13:26:37,626 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 13:26:37,943 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 13:26:37,973 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 13:26:37,973 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-21 13:26:37,974 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:26:37 BoogieIcfgContainer [2023-12-21 13:26:37,974 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 13:26:37,975 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 13:26:37,975 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 13:26:37,978 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 13:26:37,978 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:26:37" (1/3) ... [2023-12-21 13:26:37,978 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b4b19f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:26:37, skipping insertion in model container [2023-12-21 13:26:37,978 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:37" (2/3) ... [2023-12-21 13:26:37,979 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b4b19f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:26:37, skipping insertion in model container [2023-12-21 13:26:37,979 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:26:37" (3/3) ... [2023-12-21 13:26:37,980 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-12-21 13:26:38,015 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 13:26:38,015 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 13:26:38,046 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 13:26:38,051 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;@2c88bcb8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 13:26:38,051 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 13:26:38,054 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 103 states have (on average 1.6990291262135921) internal successors, (175), 104 states have internal predecessors, (175), 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) [2023-12-21 13:26:38,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-21 13:26:38,059 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:26:38,060 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:26:38,060 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:26:38,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:26:38,064 INFO L85 PathProgramCache]: Analyzing trace with hash -813563245, now seen corresponding path program 1 times [2023-12-21 13:26:38,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:26:38,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423342882] [2023-12-21 13:26:38,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:26:38,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:26:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:26:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:26:38,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:26:38,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423342882] [2023-12-21 13:26:38,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423342882] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 13:26:38,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 13:26:38,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 13:26:38,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215434305] [2023-12-21 13:26:38,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 13:26:38,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 13:26:38,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:26:38,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 13:26:38,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 13:26:38,372 INFO L87 Difference]: Start difference. First operand has 105 states, 103 states have (on average 1.6990291262135921) internal successors, (175), 104 states have internal predecessors, (175), 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 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2023-12-21 13:26:38,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:26:38,427 INFO L93 Difference]: Finished difference Result 247 states and 397 transitions. [2023-12-21 13:26:38,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 13:26:38,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 47 [2023-12-21 13:26:38,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:26:38,435 INFO L225 Difference]: With dead ends: 247 [2023-12-21 13:26:38,435 INFO L226 Difference]: Without dead ends: 164 [2023-12-21 13:26:38,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 13:26:38,440 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 122 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 13:26:38,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 360 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 13:26:38,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-12-21 13:26:38,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2023-12-21 13:26:38,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.5031055900621118) internal successors, (242), 161 states have internal predecessors, (242), 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) [2023-12-21 13:26:38,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 242 transitions. [2023-12-21 13:26:38,471 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 242 transitions. Word has length 47 [2023-12-21 13:26:38,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:26:38,472 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 242 transitions. [2023-12-21 13:26:38,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2023-12-21 13:26:38,472 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 242 transitions. [2023-12-21 13:26:38,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-21 13:26:38,473 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:26:38,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:26:38,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-21 13:26:38,474 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:26:38,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:26:38,474 INFO L85 PathProgramCache]: Analyzing trace with hash -2090397033, now seen corresponding path program 1 times [2023-12-21 13:26:38,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:26:38,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791336447] [2023-12-21 13:26:38,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:26:38,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:26:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:26:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:26:38,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:26:38,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791336447] [2023-12-21 13:26:38,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791336447] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 13:26:38,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 13:26:38,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 13:26:38,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051076678] [2023-12-21 13:26:38,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 13:26:38,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 13:26:38,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:26:38,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 13:26:38,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 13:26:38,560 INFO L87 Difference]: Start difference. First operand 162 states and 242 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 13:26:38,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:26:38,577 INFO L93 Difference]: Finished difference Result 402 states and 622 transitions. [2023-12-21 13:26:38,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 13:26:38,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-12-21 13:26:38,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:26:38,580 INFO L225 Difference]: With dead ends: 402 [2023-12-21 13:26:38,580 INFO L226 Difference]: Without dead ends: 266 [2023-12-21 13:26:38,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 13:26:38,583 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 101 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 13:26:38,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 311 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 13:26:38,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-12-21 13:26:38,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2023-12-21 13:26:38,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.532319391634981) internal successors, (403), 263 states have internal predecessors, (403), 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) [2023-12-21 13:26:38,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 403 transitions. [2023-12-21 13:26:38,595 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 403 transitions. Word has length 48 [2023-12-21 13:26:38,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:26:38,596 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 403 transitions. [2023-12-21 13:26:38,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 13:26:38,596 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 403 transitions. [2023-12-21 13:26:38,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-21 13:26:38,597 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:26:38,597 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:26:38,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-21 13:26:38,597 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:26:38,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:26:38,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2059387344, now seen corresponding path program 1 times [2023-12-21 13:26:38,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:26:38,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435984515] [2023-12-21 13:26:38,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:26:38,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:26:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:26:38,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:26:38,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:26:38,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435984515] [2023-12-21 13:26:38,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435984515] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 13:26:38,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 13:26:38,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 13:26:38,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018214065] [2023-12-21 13:26:38,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 13:26:38,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 13:26:38,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:26:38,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 13:26:38,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 13:26:38,671 INFO L87 Difference]: Start difference. First operand 264 states and 403 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2023-12-21 13:26:38,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:26:38,693 INFO L93 Difference]: Finished difference Result 676 states and 1053 transitions. [2023-12-21 13:26:38,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 13:26:38,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 49 [2023-12-21 13:26:38,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:26:38,695 INFO L225 Difference]: With dead ends: 676 [2023-12-21 13:26:38,696 INFO L226 Difference]: Without dead ends: 438 [2023-12-21 13:26:38,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 13:26:38,697 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 96 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 13:26:38,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 296 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 13:26:38,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2023-12-21 13:26:38,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 436. [2023-12-21 13:26:38,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.542528735632184) internal successors, (671), 435 states have internal predecessors, (671), 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) [2023-12-21 13:26:38,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 671 transitions. [2023-12-21 13:26:38,722 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 671 transitions. Word has length 49 [2023-12-21 13:26:38,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:26:38,722 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 671 transitions. [2023-12-21 13:26:38,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2023-12-21 13:26:38,722 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 671 transitions. [2023-12-21 13:26:38,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-21 13:26:38,723 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:26:38,723 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:26:38,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-21 13:26:38,724 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:26:38,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:26:38,724 INFO L85 PathProgramCache]: Analyzing trace with hash 343137598, now seen corresponding path program 1 times [2023-12-21 13:26:38,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:26:38,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313971289] [2023-12-21 13:26:38,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:26:38,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:26:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:26:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:26:38,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:26:38,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313971289] [2023-12-21 13:26:38,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313971289] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 13:26:38,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 13:26:38,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 13:26:38,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005299567] [2023-12-21 13:26:38,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 13:26:38,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 13:26:38,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:26:38,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 13:26:38,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-21 13:26:38,848 INFO L87 Difference]: Start difference. First operand 436 states and 671 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 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) [2023-12-21 13:26:38,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:26:38,954 INFO L93 Difference]: Finished difference Result 2486 states and 3896 transitions. [2023-12-21 13:26:38,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 13:26:38,955 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 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 50 [2023-12-21 13:26:38,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:26:38,963 INFO L225 Difference]: With dead ends: 2486 [2023-12-21 13:26:38,963 INFO L226 Difference]: Without dead ends: 2076 [2023-12-21 13:26:38,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-12-21 13:26:38,974 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 953 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 953 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 13:26:38,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [953 Valid, 1084 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 13:26:38,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2023-12-21 13:26:39,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 844. [2023-12-21 13:26:39,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 1.5409252669039146) internal successors, (1299), 843 states have internal predecessors, (1299), 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) [2023-12-21 13:26:39,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1299 transitions. [2023-12-21 13:26:39,022 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1299 transitions. Word has length 50 [2023-12-21 13:26:39,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:26:39,022 INFO L495 AbstractCegarLoop]: Abstraction has 844 states and 1299 transitions. [2023-12-21 13:26:39,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 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) [2023-12-21 13:26:39,023 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1299 transitions. [2023-12-21 13:26:39,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-21 13:26:39,027 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:26:39,027 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:26:39,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-21 13:26:39,028 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:26:39,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:26:39,028 INFO L85 PathProgramCache]: Analyzing trace with hash 2027874669, now seen corresponding path program 1 times [2023-12-21 13:26:39,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:26:39,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763674426] [2023-12-21 13:26:39,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:26:39,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:26:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:26:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:26:39,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:26:39,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763674426] [2023-12-21 13:26:39,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763674426] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 13:26:39,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 13:26:39,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 13:26:39,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476950887] [2023-12-21 13:26:39,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 13:26:39,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 13:26:39,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:26:39,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 13:26:39,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-12-21 13:26:39,180 INFO L87 Difference]: Start difference. First operand 844 states and 1299 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2023-12-21 13:26:39,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:26:39,251 INFO L93 Difference]: Finished difference Result 3708 states and 5719 transitions. [2023-12-21 13:26:39,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 13:26:39,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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 51 [2023-12-21 13:26:39,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:26:39,260 INFO L225 Difference]: With dead ends: 3708 [2023-12-21 13:26:39,261 INFO L226 Difference]: Without dead ends: 2890 [2023-12-21 13:26:39,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-12-21 13:26:39,266 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 454 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 13:26:39,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 697 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 13:26:39,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2890 states. [2023-12-21 13:26:39,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2890 to 2884. [2023-12-21 13:26:39,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2884 states, 2883 states have (on average 1.5355532431494971) internal successors, (4427), 2883 states have internal predecessors, (4427), 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) [2023-12-21 13:26:39,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2884 states to 2884 states and 4427 transitions. [2023-12-21 13:26:39,309 INFO L78 Accepts]: Start accepts. Automaton has 2884 states and 4427 transitions. Word has length 51 [2023-12-21 13:26:39,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:26:39,309 INFO L495 AbstractCegarLoop]: Abstraction has 2884 states and 4427 transitions. [2023-12-21 13:26:39,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2023-12-21 13:26:39,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2884 states and 4427 transitions. [2023-12-21 13:26:39,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-21 13:26:39,312 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:26:39,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:26:39,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-21 13:26:39,312 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:26:39,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:26:39,313 INFO L85 PathProgramCache]: Analyzing trace with hash 994594015, now seen corresponding path program 1 times [2023-12-21 13:26:39,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:26:39,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393056089] [2023-12-21 13:26:39,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:26:39,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:26:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:26:39,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:26:39,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:26:39,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393056089] [2023-12-21 13:26:39,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393056089] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 13:26:39,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 13:26:39,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 13:26:39,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306076992] [2023-12-21 13:26:39,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 13:26:39,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 13:26:39,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:26:39,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 13:26:39,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 13:26:39,380 INFO L87 Difference]: Start difference. First operand 2884 states and 4427 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2023-12-21 13:26:39,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:26:39,409 INFO L93 Difference]: Finished difference Result 7768 states and 11885 transitions. [2023-12-21 13:26:39,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 13:26:39,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 53 [2023-12-21 13:26:39,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:26:39,422 INFO L225 Difference]: With dead ends: 7768 [2023-12-21 13:26:39,423 INFO L226 Difference]: Without dead ends: 4910 [2023-12-21 13:26:39,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 13:26:39,428 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 107 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 13:26:39,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 359 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 13:26:39,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4910 states. [2023-12-21 13:26:39,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4910 to 4908. [2023-12-21 13:26:39,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4908 states, 4907 states have (on average 1.5119217444467088) internal successors, (7419), 4907 states have internal predecessors, (7419), 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) [2023-12-21 13:26:39,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4908 states to 4908 states and 7419 transitions. [2023-12-21 13:26:39,511 INFO L78 Accepts]: Start accepts. Automaton has 4908 states and 7419 transitions. Word has length 53 [2023-12-21 13:26:39,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:26:39,512 INFO L495 AbstractCegarLoop]: Abstraction has 4908 states and 7419 transitions. [2023-12-21 13:26:39,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2023-12-21 13:26:39,512 INFO L276 IsEmpty]: Start isEmpty. Operand 4908 states and 7419 transitions. [2023-12-21 13:26:39,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-21 13:26:39,513 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:26:39,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:26:39,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-21 13:26:39,513 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:26:39,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:26:39,514 INFO L85 PathProgramCache]: Analyzing trace with hash 200165270, now seen corresponding path program 1 times [2023-12-21 13:26:39,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:26:39,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107099965] [2023-12-21 13:26:39,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:26:39,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:26:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:26:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:26:39,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:26:39,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107099965] [2023-12-21 13:26:39,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107099965] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 13:26:39,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 13:26:39,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 13:26:39,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498513960] [2023-12-21 13:26:39,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 13:26:39,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 13:26:39,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:26:39,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 13:26:39,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 13:26:39,666 INFO L87 Difference]: Start difference. First operand 4908 states and 7419 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2023-12-21 13:26:39,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:26:39,824 INFO L93 Difference]: Finished difference Result 14672 states and 22205 transitions. [2023-12-21 13:26:39,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 13:26:39,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 53 [2023-12-21 13:26:39,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:26:39,848 INFO L225 Difference]: With dead ends: 14672 [2023-12-21 13:26:39,848 INFO L226 Difference]: Without dead ends: 9790 [2023-12-21 13:26:39,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-21 13:26:39,856 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 631 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 13:26:39,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 175 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 13:26:39,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9790 states. [2023-12-21 13:26:39,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9790 to 9788. [2023-12-21 13:26:39,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9788 states, 9787 states have (on average 1.503525084295494) internal successors, (14715), 9787 states have internal predecessors, (14715), 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) [2023-12-21 13:26:40,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9788 states to 9788 states and 14715 transitions. [2023-12-21 13:26:40,017 INFO L78 Accepts]: Start accepts. Automaton has 9788 states and 14715 transitions. Word has length 53 [2023-12-21 13:26:40,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:26:40,018 INFO L495 AbstractCegarLoop]: Abstraction has 9788 states and 14715 transitions. [2023-12-21 13:26:40,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2023-12-21 13:26:40,018 INFO L276 IsEmpty]: Start isEmpty. Operand 9788 states and 14715 transitions. [2023-12-21 13:26:40,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-21 13:26:40,019 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:26:40,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:26:40,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-21 13:26:40,019 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:26:40,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:26:40,020 INFO L85 PathProgramCache]: Analyzing trace with hash -614246725, now seen corresponding path program 1 times [2023-12-21 13:26:40,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:26:40,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012658877] [2023-12-21 13:26:40,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:26:40,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:26:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:26:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:26:40,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:26:40,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012658877] [2023-12-21 13:26:40,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012658877] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 13:26:40,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 13:26:40,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 13:26:40,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107028544] [2023-12-21 13:26:40,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 13:26:40,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 13:26:40,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:26:40,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 13:26:40,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 13:26:40,156 INFO L87 Difference]: Start difference. First operand 9788 states and 14715 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2023-12-21 13:26:40,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:26:40,230 INFO L93 Difference]: Finished difference Result 20062 states and 29916 transitions. [2023-12-21 13:26:40,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 13:26:40,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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 53 [2023-12-21 13:26:40,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:26:40,280 INFO L225 Difference]: With dead ends: 20062 [2023-12-21 13:26:40,280 INFO L226 Difference]: Without dead ends: 20060 [2023-12-21 13:26:40,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-21 13:26:40,290 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 232 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 13:26:40,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 714 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 13:26:40,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20060 states. [2023-12-21 13:26:40,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20060 to 10300. [2023-12-21 13:26:40,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10300 states, 10299 states have (on average 1.4784930575784057) internal successors, (15227), 10299 states have internal predecessors, (15227), 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) [2023-12-21 13:26:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10300 states to 10300 states and 15227 transitions. [2023-12-21 13:26:40,590 INFO L78 Accepts]: Start accepts. Automaton has 10300 states and 15227 transitions. Word has length 53 [2023-12-21 13:26:40,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:26:40,591 INFO L495 AbstractCegarLoop]: Abstraction has 10300 states and 15227 transitions. [2023-12-21 13:26:40,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2023-12-21 13:26:40,591 INFO L276 IsEmpty]: Start isEmpty. Operand 10300 states and 15227 transitions. [2023-12-21 13:26:40,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-21 13:26:40,592 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:26:40,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:26:40,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-21 13:26:40,592 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:26:40,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:26:40,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1851206240, now seen corresponding path program 1 times [2023-12-21 13:26:40,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:26:40,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723871077] [2023-12-21 13:26:40,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:26:40,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:26:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:26:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:26:40,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:26:40,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723871077] [2023-12-21 13:26:40,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723871077] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 13:26:40,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 13:26:40,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 13:26:40,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342565611] [2023-12-21 13:26:40,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 13:26:40,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 13:26:40,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:26:40,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 13:26:40,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 13:26:40,636 INFO L87 Difference]: Start difference. First operand 10300 states and 15227 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2023-12-21 13:26:40,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:26:40,689 INFO L93 Difference]: Finished difference Result 25042 states and 37003 transitions. [2023-12-21 13:26:40,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 13:26:40,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 54 [2023-12-21 13:26:40,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:26:40,709 INFO L225 Difference]: With dead ends: 25042 [2023-12-21 13:26:40,710 INFO L226 Difference]: Without dead ends: 14768 [2023-12-21 13:26:40,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 13:26:40,725 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 85 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 13:26:40,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 261 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 13:26:40,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14768 states. [2023-12-21 13:26:40,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14768 to 14654. [2023-12-21 13:26:40,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14654 states, 14653 states have (on average 1.464887736299734) internal successors, (21465), 14653 states have internal predecessors, (21465), 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) [2023-12-21 13:26:40,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14654 states to 14654 states and 21465 transitions. [2023-12-21 13:26:40,959 INFO L78 Accepts]: Start accepts. Automaton has 14654 states and 21465 transitions. Word has length 54 [2023-12-21 13:26:40,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:26:40,959 INFO L495 AbstractCegarLoop]: Abstraction has 14654 states and 21465 transitions. [2023-12-21 13:26:40,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2023-12-21 13:26:40,959 INFO L276 IsEmpty]: Start isEmpty. Operand 14654 states and 21465 transitions. [2023-12-21 13:26:40,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-21 13:26:40,963 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:26:40,963 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:26:40,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-21 13:26:40,963 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:26:40,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:26:40,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1774240818, now seen corresponding path program 1 times [2023-12-21 13:26:40,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:26:40,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536581930] [2023-12-21 13:26:40,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:26:40,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:26:40,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:26:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:26:41,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:26:41,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536581930] [2023-12-21 13:26:41,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536581930] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 13:26:41,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 13:26:41,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 13:26:41,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557559075] [2023-12-21 13:26:41,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 13:26:41,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 13:26:41,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:26:41,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 13:26:41,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 13:26:41,013 INFO L87 Difference]: Start difference. First operand 14654 states and 21465 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-12-21 13:26:41,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:26:41,094 INFO L93 Difference]: Finished difference Result 28164 states and 41181 transitions. [2023-12-21 13:26:41,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 13:26:41,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 76 [2023-12-21 13:26:41,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:26:41,125 INFO L225 Difference]: With dead ends: 28164 [2023-12-21 13:26:41,125 INFO L226 Difference]: Without dead ends: 20098 [2023-12-21 13:26:41,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 13:26:41,139 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 86 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 13:26:41,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 310 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 13:26:41,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20098 states. [2023-12-21 13:26:41,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20098 to 18848. [2023-12-21 13:26:41,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18848 states, 18847 states have (on average 1.446118745688969) internal successors, (27255), 18847 states have internal predecessors, (27255), 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) [2023-12-21 13:26:41,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18848 states to 18848 states and 27255 transitions. [2023-12-21 13:26:41,419 INFO L78 Accepts]: Start accepts. Automaton has 18848 states and 27255 transitions. Word has length 76 [2023-12-21 13:26:41,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:26:41,419 INFO L495 AbstractCegarLoop]: Abstraction has 18848 states and 27255 transitions. [2023-12-21 13:26:41,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-12-21 13:26:41,420 INFO L276 IsEmpty]: Start isEmpty. Operand 18848 states and 27255 transitions. [2023-12-21 13:26:41,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-21 13:26:41,425 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:26:41,425 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:26:41,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-21 13:26:41,425 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:26:41,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:26:41,425 INFO L85 PathProgramCache]: Analyzing trace with hash 644043701, now seen corresponding path program 1 times [2023-12-21 13:26:41,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:26:41,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153044208] [2023-12-21 13:26:41,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:26:41,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:26:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:26:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:26:41,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:26:41,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153044208] [2023-12-21 13:26:41,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153044208] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 13:26:41,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 13:26:41,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 13:26:41,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485324111] [2023-12-21 13:26:41,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 13:26:41,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 13:26:41,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:26:41,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 13:26:41,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 13:26:41,539 INFO L87 Difference]: Start difference. First operand 18848 states and 27255 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-12-21 13:26:41,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:26:41,598 INFO L93 Difference]: Finished difference Result 29471 states and 42418 transitions. [2023-12-21 13:26:41,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 13:26:41,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 76 [2023-12-21 13:26:41,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:26:41,628 INFO L225 Difference]: With dead ends: 29471 [2023-12-21 13:26:41,628 INFO L226 Difference]: Without dead ends: 19980 [2023-12-21 13:26:41,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 13:26:41,642 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 87 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 13:26:41,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 329 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 13:26:41,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19980 states. [2023-12-21 13:26:41,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19980 to 19255. [2023-12-21 13:26:41,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19255 states, 19254 states have (on average 1.4222499220941103) internal successors, (27384), 19254 states have internal predecessors, (27384), 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) [2023-12-21 13:26:41,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19255 states to 19255 states and 27384 transitions. [2023-12-21 13:26:41,865 INFO L78 Accepts]: Start accepts. Automaton has 19255 states and 27384 transitions. Word has length 76 [2023-12-21 13:26:41,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:26:41,866 INFO L495 AbstractCegarLoop]: Abstraction has 19255 states and 27384 transitions. [2023-12-21 13:26:41,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-12-21 13:26:41,866 INFO L276 IsEmpty]: Start isEmpty. Operand 19255 states and 27384 transitions. [2023-12-21 13:26:41,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-21 13:26:41,870 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:26:41,871 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:26:41,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-21 13:26:41,871 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:26:41,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:26:41,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1569217297, now seen corresponding path program 1 times [2023-12-21 13:26:41,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:26:41,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094668471] [2023-12-21 13:26:41,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:26:41,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:26:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:26:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 13:26:41,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:26:41,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094668471] [2023-12-21 13:26:41,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094668471] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 13:26:41,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 13:26:41,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 13:26:41,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827595166] [2023-12-21 13:26:41,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 13:26:41,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 13:26:41,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:26:41,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 13:26:41,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-21 13:26:41,945 INFO L87 Difference]: Start difference. First operand 19255 states and 27384 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 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) [2023-12-21 13:26:42,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:26:42,084 INFO L93 Difference]: Finished difference Result 42705 states and 61533 transitions. [2023-12-21 13:26:42,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 13:26:42,084 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 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 76 [2023-12-21 13:26:42,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:26:42,226 INFO L225 Difference]: With dead ends: 42705 [2023-12-21 13:26:42,226 INFO L226 Difference]: Without dead ends: 34418 [2023-12-21 13:26:42,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-12-21 13:26:42,235 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 702 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 13:26:42,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [702 Valid, 979 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 13:26:42,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34418 states. [2023-12-21 13:26:42,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34418 to 26262. [2023-12-21 13:26:42,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26262 states, 26261 states have (on average 1.4234416054224897) internal successors, (37381), 26261 states have internal predecessors, (37381), 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) [2023-12-21 13:26:42,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26262 states to 26262 states and 37381 transitions. [2023-12-21 13:26:42,566 INFO L78 Accepts]: Start accepts. Automaton has 26262 states and 37381 transitions. Word has length 76 [2023-12-21 13:26:42,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:26:42,566 INFO L495 AbstractCegarLoop]: Abstraction has 26262 states and 37381 transitions. [2023-12-21 13:26:42,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 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) [2023-12-21 13:26:42,566 INFO L276 IsEmpty]: Start isEmpty. Operand 26262 states and 37381 transitions. [2023-12-21 13:26:42,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-21 13:26:42,572 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:26:42,572 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:26:42,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-21 13:26:42,572 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:26:42,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:26:42,572 INFO L85 PathProgramCache]: Analyzing trace with hash 501121061, now seen corresponding path program 1 times [2023-12-21 13:26:42,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:26:42,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833893547] [2023-12-21 13:26:42,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:26:42,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:26:42,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:26:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 13:26:42,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:26:42,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833893547] [2023-12-21 13:26:42,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833893547] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 13:26:42,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 13:26:42,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 13:26:42,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572935867] [2023-12-21 13:26:42,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 13:26:42,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 13:26:42,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:26:42,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 13:26:42,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-21 13:26:42,652 INFO L87 Difference]: Start difference. First operand 26262 states and 37381 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 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) [2023-12-21 13:26:42,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:26:42,791 INFO L93 Difference]: Finished difference Result 46157 states and 66434 transitions. [2023-12-21 13:26:42,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 13:26:42,792 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 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 76 [2023-12-21 13:26:42,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:26:42,838 INFO L225 Difference]: With dead ends: 46157 [2023-12-21 13:26:42,838 INFO L226 Difference]: Without dead ends: 40208 [2023-12-21 13:26:42,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-12-21 13:26:42,855 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 743 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 13:26:42,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [743 Valid, 866 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 13:26:42,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40208 states. [2023-12-21 13:26:43,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40208 to 32070. [2023-12-21 13:26:43,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32070 states, 32069 states have (on average 1.4250834138888022) internal successors, (45701), 32069 states have internal predecessors, (45701), 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) [2023-12-21 13:26:43,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32070 states to 32070 states and 45701 transitions. [2023-12-21 13:26:43,357 INFO L78 Accepts]: Start accepts. Automaton has 32070 states and 45701 transitions. Word has length 76 [2023-12-21 13:26:43,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:26:43,357 INFO L495 AbstractCegarLoop]: Abstraction has 32070 states and 45701 transitions. [2023-12-21 13:26:43,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 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) [2023-12-21 13:26:43,357 INFO L276 IsEmpty]: Start isEmpty. Operand 32070 states and 45701 transitions. [2023-12-21 13:26:43,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-21 13:26:43,363 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:26:43,363 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:26:43,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-21 13:26:43,363 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:26:43,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:26:43,364 INFO L85 PathProgramCache]: Analyzing trace with hash 256605818, now seen corresponding path program 1 times [2023-12-21 13:26:43,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:26:43,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351460244] [2023-12-21 13:26:43,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:26:43,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:26:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:26:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-21 13:26:43,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:26:43,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351460244] [2023-12-21 13:26:43,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351460244] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 13:26:43,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 13:26:43,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 13:26:43,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061122796] [2023-12-21 13:26:43,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 13:26:43,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 13:26:43,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:26:43,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 13:26:43,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-21 13:26:43,453 INFO L87 Difference]: Start difference. First operand 32070 states and 45701 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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) [2023-12-21 13:26:43,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:26:43,717 INFO L93 Difference]: Finished difference Result 48034 states and 69036 transitions. [2023-12-21 13:26:43,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 13:26:43,718 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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 76 [2023-12-21 13:26:43,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:26:43,769 INFO L225 Difference]: With dead ends: 48034 [2023-12-21 13:26:43,770 INFO L226 Difference]: Without dead ends: 44088 [2023-12-21 13:26:43,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-12-21 13:26:43,786 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 716 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 13:26:43,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 900 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 13:26:43,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44088 states. [2023-12-21 13:26:44,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44088 to 35950. [2023-12-21 13:26:44,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35950 states, 35949 states have (on average 1.4261592812039279) internal successors, (51269), 35949 states have internal predecessors, (51269), 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) [2023-12-21 13:26:44,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35950 states to 35950 states and 51269 transitions. [2023-12-21 13:26:44,242 INFO L78 Accepts]: Start accepts. Automaton has 35950 states and 51269 transitions. Word has length 76 [2023-12-21 13:26:44,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:26:44,242 INFO L495 AbstractCegarLoop]: Abstraction has 35950 states and 51269 transitions. [2023-12-21 13:26:44,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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) [2023-12-21 13:26:44,243 INFO L276 IsEmpty]: Start isEmpty. Operand 35950 states and 51269 transitions. [2023-12-21 13:26:44,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-21 13:26:44,249 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:26:44,250 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:26:44,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-21 13:26:44,250 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:26:44,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:26:44,251 INFO L85 PathProgramCache]: Analyzing trace with hash 623948307, now seen corresponding path program 1 times [2023-12-21 13:26:44,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:26:44,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736629427] [2023-12-21 13:26:44,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:26:44,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:26:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:26:44,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:26:44,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:26:44,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736629427] [2023-12-21 13:26:44,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736629427] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 13:26:44,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483069328] [2023-12-21 13:26:44,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:26:44,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 13:26:44,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 13:26:44,530 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) [2023-12-21 13:26:44,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 13:26:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:26:44,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-21 13:26:44,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 13:26:44,790 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 13:26:44,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 13:26:45,013 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 13:26:45,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483069328] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 13:26:45,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 13:26:45,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 13 [2023-12-21 13:26:45,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561363575] [2023-12-21 13:26:45,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 13:26:45,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-21 13:26:45,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:26:45,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-21 13:26:45,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-12-21 13:26:45,016 INFO L87 Difference]: Start difference. First operand 35950 states and 51269 transitions. Second operand has 13 states, 13 states have (on average 16.923076923076923) internal successors, (220), 13 states have internal predecessors, (220), 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) [2023-12-21 13:26:51,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:26:51,769 INFO L93 Difference]: Finished difference Result 525099 states and 739084 transitions. [2023-12-21 13:26:51,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2023-12-21 13:26:51,769 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 16.923076923076923) internal successors, (220), 13 states have internal predecessors, (220), 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 77 [2023-12-21 13:26:51,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:26:52,616 INFO L225 Difference]: With dead ends: 525099 [2023-12-21 13:26:52,616 INFO L226 Difference]: Without dead ends: 487494 [2023-12-21 13:26:52,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8497 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2917, Invalid=16265, Unknown=0, NotChecked=0, Total=19182 [2023-12-21 13:26:52,710 INFO L413 NwaCegarLoop]: 542 mSDtfsCounter, 8175 mSDsluCounter, 3597 mSDsCounter, 0 mSdLazyCounter, 3957 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8175 SdHoareTripleChecker+Valid, 4139 SdHoareTripleChecker+Invalid, 4013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-21 13:26:52,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8175 Valid, 4139 Invalid, 4013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 3957 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-21 13:26:52,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487494 states. [2023-12-21 13:26:56,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487494 to 178199. [2023-12-21 13:26:56,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178199 states, 178198 states have (on average 1.394976374594552) internal successors, (248582), 178198 states have internal predecessors, (248582), 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) [2023-12-21 13:26:56,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178199 states to 178199 states and 248582 transitions. [2023-12-21 13:26:56,835 INFO L78 Accepts]: Start accepts. Automaton has 178199 states and 248582 transitions. Word has length 77 [2023-12-21 13:26:56,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:26:56,835 INFO L495 AbstractCegarLoop]: Abstraction has 178199 states and 248582 transitions. [2023-12-21 13:26:56,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.923076923076923) internal successors, (220), 13 states have internal predecessors, (220), 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) [2023-12-21 13:26:56,836 INFO L276 IsEmpty]: Start isEmpty. Operand 178199 states and 248582 transitions. [2023-12-21 13:26:56,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-21 13:26:56,844 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:26:56,844 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:26:56,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-21 13:26:57,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-21 13:26:57,049 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:26:57,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:26:57,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1272026816, now seen corresponding path program 1 times [2023-12-21 13:26:57,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:26:57,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377082389] [2023-12-21 13:26:57,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:26:57,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:26:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:26:57,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:26:57,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:26:57,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377082389] [2023-12-21 13:26:57,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377082389] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 13:26:57,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 13:26:57,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 13:26:57,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101780557] [2023-12-21 13:26:57,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 13:26:57,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 13:26:57,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:26:57,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 13:26:57,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 13:26:57,085 INFO L87 Difference]: Start difference. First operand 178199 states and 248582 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2023-12-21 13:26:58,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:26:58,567 INFO L93 Difference]: Finished difference Result 492364 states and 684307 transitions. [2023-12-21 13:26:58,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 13:26:58,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 78 [2023-12-21 13:26:58,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:26:59,240 INFO L225 Difference]: With dead ends: 492364 [2023-12-21 13:26:59,240 INFO L226 Difference]: Without dead ends: 328643 [2023-12-21 13:26:59,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 13:26:59,339 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 81 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 13:26:59,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 293 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 13:26:59,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328643 states. [2023-12-21 13:27:02,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328643 to 328454. [2023-12-21 13:27:02,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328454 states, 328453 states have (on average 1.374458446109489) internal successors, (451445), 328453 states have internal predecessors, (451445), 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) [2023-12-21 13:27:03,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328454 states to 328454 states and 451445 transitions. [2023-12-21 13:27:03,656 INFO L78 Accepts]: Start accepts. Automaton has 328454 states and 451445 transitions. Word has length 78 [2023-12-21 13:27:03,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:27:03,657 INFO L495 AbstractCegarLoop]: Abstraction has 328454 states and 451445 transitions. [2023-12-21 13:27:03,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2023-12-21 13:27:03,657 INFO L276 IsEmpty]: Start isEmpty. Operand 328454 states and 451445 transitions. [2023-12-21 13:27:03,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-21 13:27:03,669 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:27:03,670 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:27:03,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-21 13:27:03,670 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:27:03,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:27:03,670 INFO L85 PathProgramCache]: Analyzing trace with hash -2114294557, now seen corresponding path program 1 times [2023-12-21 13:27:03,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:27:03,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238604539] [2023-12-21 13:27:03,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:27:03,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:27:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:27:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 13:27:03,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:27:03,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238604539] [2023-12-21 13:27:03,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238604539] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 13:27:03,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 13:27:03,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 13:27:03,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639910247] [2023-12-21 13:27:03,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 13:27:03,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 13:27:03,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:27:03,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 13:27:03,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-21 13:27:03,768 INFO L87 Difference]: Start difference. First operand 328454 states and 451445 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 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) [2023-12-21 13:27:05,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:27:05,437 INFO L93 Difference]: Finished difference Result 544749 states and 754317 transitions. [2023-12-21 13:27:05,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 13:27:05,440 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 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 79 [2023-12-21 13:27:05,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:27:06,199 INFO L225 Difference]: With dead ends: 544749 [2023-12-21 13:27:06,199 INFO L226 Difference]: Without dead ends: 477395 [2023-12-21 13:27:06,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-12-21 13:27:06,309 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 693 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 13:27:06,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [693 Valid, 988 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 13:27:06,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477395 states. [2023-12-21 13:27:10,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477395 to 382552. [2023-12-21 13:27:10,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382552 states, 382551 states have (on average 1.372698019349054) internal successors, (525127), 382551 states have internal predecessors, (525127), 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) [2023-12-21 13:27:11,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382552 states to 382552 states and 525127 transitions. [2023-12-21 13:27:11,742 INFO L78 Accepts]: Start accepts. Automaton has 382552 states and 525127 transitions. Word has length 79 [2023-12-21 13:27:11,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:27:11,743 INFO L495 AbstractCegarLoop]: Abstraction has 382552 states and 525127 transitions. [2023-12-21 13:27:11,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 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) [2023-12-21 13:27:11,743 INFO L276 IsEmpty]: Start isEmpty. Operand 382552 states and 525127 transitions. [2023-12-21 13:27:11,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-21 13:27:11,754 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:27:11,754 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:27:11,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-21 13:27:11,754 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:27:11,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:27:11,754 INFO L85 PathProgramCache]: Analyzing trace with hash 457585236, now seen corresponding path program 1 times [2023-12-21 13:27:11,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:27:11,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616521818] [2023-12-21 13:27:11,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:27:11,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:27:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:27:11,784 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:27:11,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:27:11,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616521818] [2023-12-21 13:27:11,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616521818] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 13:27:11,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 13:27:11,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 13:27:11,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487422444] [2023-12-21 13:27:11,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 13:27:11,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 13:27:11,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:27:11,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 13:27:11,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 13:27:11,786 INFO L87 Difference]: Start difference. First operand 382552 states and 525127 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2023-12-21 13:27:14,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:27:14,938 INFO L93 Difference]: Finished difference Result 882461 states and 1207736 transitions. [2023-12-21 13:27:14,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 13:27:14,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 79 [2023-12-21 13:27:14,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:27:16,274 INFO L225 Difference]: With dead ends: 882461 [2023-12-21 13:27:16,274 INFO L226 Difference]: Without dead ends: 510205 [2023-12-21 13:27:16,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 13:27:16,619 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 83 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 13:27:16,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 323 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 13:27:17,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510205 states. [2023-12-21 13:27:21,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510205 to 404417. [2023-12-21 13:27:21,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404417 states, 404416 states have (on average 1.3566921190061718) internal successors, (548668), 404416 states have internal predecessors, (548668), 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) [2023-12-21 13:27:22,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404417 states to 404417 states and 548668 transitions. [2023-12-21 13:27:22,931 INFO L78 Accepts]: Start accepts. Automaton has 404417 states and 548668 transitions. Word has length 79 [2023-12-21 13:27:22,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:27:22,932 INFO L495 AbstractCegarLoop]: Abstraction has 404417 states and 548668 transitions. [2023-12-21 13:27:22,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2023-12-21 13:27:22,932 INFO L276 IsEmpty]: Start isEmpty. Operand 404417 states and 548668 transitions. [2023-12-21 13:27:22,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-21 13:27:22,948 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:27:22,948 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:27:22,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-21 13:27:22,949 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:27:22,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:27:22,949 INFO L85 PathProgramCache]: Analyzing trace with hash -361972062, now seen corresponding path program 1 times [2023-12-21 13:27:22,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:27:22,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782154410] [2023-12-21 13:27:22,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:27:22,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:27:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:27:23,003 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 13:27:23,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:27:23,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782154410] [2023-12-21 13:27:23,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782154410] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 13:27:23,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 13:27:23,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 13:27:23,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100831579] [2023-12-21 13:27:23,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 13:27:23,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 13:27:23,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:27:23,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 13:27:23,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 13:27:23,005 INFO L87 Difference]: Start difference. First operand 404417 states and 548668 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 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) [2023-12-21 13:27:26,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:27:26,013 INFO L93 Difference]: Finished difference Result 978681 states and 1325264 transitions. [2023-12-21 13:27:26,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 13:27:26,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 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 81 [2023-12-21 13:27:26,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:27:27,286 INFO L225 Difference]: With dead ends: 978681 [2023-12-21 13:27:27,287 INFO L226 Difference]: Without dead ends: 574376 [2023-12-21 13:27:27,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-21 13:27:27,428 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 587 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 13:27:27,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 179 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 13:27:27,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574376 states. [2023-12-21 13:27:33,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574376 to 570918. [2023-12-21 13:27:33,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570918 states, 570917 states have (on average 1.344303988145387) internal successors, (767486), 570917 states have internal predecessors, (767486), 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) [2023-12-21 13:27:35,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570918 states to 570918 states and 767486 transitions. [2023-12-21 13:27:35,911 INFO L78 Accepts]: Start accepts. Automaton has 570918 states and 767486 transitions. Word has length 81 [2023-12-21 13:27:35,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:27:35,912 INFO L495 AbstractCegarLoop]: Abstraction has 570918 states and 767486 transitions. [2023-12-21 13:27:35,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 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) [2023-12-21 13:27:35,912 INFO L276 IsEmpty]: Start isEmpty. Operand 570918 states and 767486 transitions. [2023-12-21 13:27:35,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-21 13:27:35,931 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:27:35,931 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:27:35,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-21 13:27:35,932 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:27:35,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:27:35,933 INFO L85 PathProgramCache]: Analyzing trace with hash 224069789, now seen corresponding path program 1 times [2023-12-21 13:27:35,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:27:35,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812432908] [2023-12-21 13:27:35,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:27:35,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:27:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:27:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:27:36,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:27:36,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812432908] [2023-12-21 13:27:36,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812432908] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 13:27:36,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288367383] [2023-12-21 13:27:36,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:27:36,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 13:27:36,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 13:27:36,061 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) [2023-12-21 13:27:36,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 13:27:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:27:36,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 13:27:36,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 13:27:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:27:36,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 13:27:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:27:36,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288367383] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 13:27:36,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 13:27:36,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-12-21 13:27:36,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563120100] [2023-12-21 13:27:36,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 13:27:36,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-21 13:27:36,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:27:36,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-21 13:27:36,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-12-21 13:27:36,837 INFO L87 Difference]: Start difference. First operand 570918 states and 767486 transitions. Second operand has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 10 states have internal predecessors, (138), 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) [2023-12-21 13:27:42,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:27:42,141 INFO L93 Difference]: Finished difference Result 1347978 states and 1813084 transitions. [2023-12-21 13:27:42,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 13:27:42,142 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 10 states have internal predecessors, (138), 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 81 [2023-12-21 13:27:42,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:27:43,902 INFO L225 Difference]: With dead ends: 1347978 [2023-12-21 13:27:43,903 INFO L226 Difference]: Without dead ends: 970267 [2023-12-21 13:27:44,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 152 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-12-21 13:27:44,496 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 2457 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2457 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 13:27:44,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2457 Valid, 502 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 13:27:45,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970267 states. [2023-12-21 13:27:52,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970267 to 573523. [2023-12-21 13:27:52,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573523 states, 573522 states have (on average 1.3528862014011669) internal successors, (775910), 573522 states have internal predecessors, (775910), 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) [2023-12-21 13:27:55,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573523 states to 573523 states and 775910 transitions. [2023-12-21 13:27:55,395 INFO L78 Accepts]: Start accepts. Automaton has 573523 states and 775910 transitions. Word has length 81 [2023-12-21 13:27:55,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:27:55,395 INFO L495 AbstractCegarLoop]: Abstraction has 573523 states and 775910 transitions. [2023-12-21 13:27:55,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 10 states have internal predecessors, (138), 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) [2023-12-21 13:27:55,395 INFO L276 IsEmpty]: Start isEmpty. Operand 573523 states and 775910 transitions. [2023-12-21 13:27:55,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-21 13:27:55,412 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:27:55,412 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:27:55,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-21 13:27:55,616 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,SelfDestructingSolverStorable19 [2023-12-21 13:27:55,616 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:27:55,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:27:55,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1459630910, now seen corresponding path program 1 times [2023-12-21 13:27:55,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:27:55,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013364098] [2023-12-21 13:27:55,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:27:55,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:27:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:27:55,748 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 13:27:55,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:27:55,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013364098] [2023-12-21 13:27:55,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013364098] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 13:27:55,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 13:27:55,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 13:27:55,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035218337] [2023-12-21 13:27:55,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 13:27:55,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 13:27:55,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:27:55,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 13:27:55,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 13:27:55,750 INFO L87 Difference]: Start difference. First operand 573523 states and 775910 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 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) [2023-12-21 13:28:00,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:28:00,387 INFO L93 Difference]: Finished difference Result 1365021 states and 1843816 transitions. [2023-12-21 13:28:00,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 13:28:00,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 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 81 [2023-12-21 13:28:00,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:28:01,979 INFO L225 Difference]: With dead ends: 1365021 [2023-12-21 13:28:01,980 INFO L226 Difference]: Without dead ends: 791676 [2023-12-21 13:28:02,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-21 13:28:02,325 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 569 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 13:28:02,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [569 Valid, 187 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 13:28:02,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791676 states. [2023-12-21 13:28:10,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791676 to 787053. [2023-12-21 13:28:11,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787053 states, 787052 states have (on average 1.341161702149286) internal successors, (1055564), 787052 states have internal predecessors, (1055564), 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) [2023-12-21 13:28:13,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787053 states to 787053 states and 1055564 transitions. [2023-12-21 13:28:13,624 INFO L78 Accepts]: Start accepts. Automaton has 787053 states and 1055564 transitions. Word has length 81 [2023-12-21 13:28:13,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:28:13,624 INFO L495 AbstractCegarLoop]: Abstraction has 787053 states and 1055564 transitions. [2023-12-21 13:28:13,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 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) [2023-12-21 13:28:13,624 INFO L276 IsEmpty]: Start isEmpty. Operand 787053 states and 1055564 transitions. [2023-12-21 13:28:13,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-21 13:28:13,639 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:28:13,639 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:28:13,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-21 13:28:13,639 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:28:13,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:28:13,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1962675737, now seen corresponding path program 1 times [2023-12-21 13:28:13,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:28:13,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895315167] [2023-12-21 13:28:13,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:28:13,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:28:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:28:13,705 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:28:13,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:28:13,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895315167] [2023-12-21 13:28:13,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895315167] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 13:28:13,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477558404] [2023-12-21 13:28:13,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:28:13,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 13:28:13,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 13:28:13,707 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) [2023-12-21 13:28:13,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-21 13:28:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:28:13,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 13:28:13,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 13:28:13,952 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:28:13,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 13:28:14,039 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:28:14,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477558404] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 13:28:14,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 13:28:14,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-12-21 13:28:14,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756520811] [2023-12-21 13:28:14,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 13:28:14,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-21 13:28:14,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:28:14,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-21 13:28:14,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-12-21 13:28:14,041 INFO L87 Difference]: Start difference. First operand 787053 states and 1055564 transitions. Second operand has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 10 states have internal predecessors, (138), 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) [2023-12-21 13:28:21,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:28:21,468 INFO L93 Difference]: Finished difference Result 1947447 states and 2598268 transitions. [2023-12-21 13:28:21,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 13:28:21,472 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 10 states have internal predecessors, (138), 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 81 [2023-12-21 13:28:21,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:28:24,600 INFO L225 Difference]: With dead ends: 1947447 [2023-12-21 13:28:24,601 INFO L226 Difference]: Without dead ends: 1381722 [2023-12-21 13:28:24,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 152 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-12-21 13:28:24,965 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 2432 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2432 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 13:28:24,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2432 Valid, 354 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 13:28:26,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381722 states. [2023-12-21 13:28:36,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381722 to 843849. [2023-12-21 13:28:37,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843849 states, 843848 states have (on average 1.3411846683288933) internal successors, (1131756), 843848 states have internal predecessors, (1131756), 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) [2023-12-21 13:28:41,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843849 states to 843849 states and 1131756 transitions. [2023-12-21 13:28:41,328 INFO L78 Accepts]: Start accepts. Automaton has 843849 states and 1131756 transitions. Word has length 81 [2023-12-21 13:28:41,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:28:41,328 INFO L495 AbstractCegarLoop]: Abstraction has 843849 states and 1131756 transitions. [2023-12-21 13:28:41,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 10 states have internal predecessors, (138), 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) [2023-12-21 13:28:41,328 INFO L276 IsEmpty]: Start isEmpty. Operand 843849 states and 1131756 transitions. [2023-12-21 13:28:41,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-21 13:28:41,362 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:28:41,362 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:28:41,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-21 13:28:41,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 13:28:41,566 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:28:41,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:28:41,566 INFO L85 PathProgramCache]: Analyzing trace with hash 716743349, now seen corresponding path program 1 times [2023-12-21 13:28:41,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:28:41,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722671230] [2023-12-21 13:28:41,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:28:41,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:28:41,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:28:41,690 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:28:41,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:28:41,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722671230] [2023-12-21 13:28:41,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722671230] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 13:28:41,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 13:28:41,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 13:28:41,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803958308] [2023-12-21 13:28:41,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 13:28:41,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 13:28:41,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:28:41,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 13:28:41,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 13:28:41,691 INFO L87 Difference]: Start difference. First operand 843849 states and 1131756 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2023-12-21 13:28:47,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:28:47,340 INFO L93 Difference]: Finished difference Result 1452804 states and 1939210 transitions. [2023-12-21 13:28:47,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 13:28:47,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 83 [2023-12-21 13:28:47,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:28:49,031 INFO L225 Difference]: With dead ends: 1452804 [2023-12-21 13:28:49,031 INFO L226 Difference]: Without dead ends: 609157 [2023-12-21 13:28:49,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 13:28:49,557 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 79 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 13:28:49,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 306 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 13:28:50,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609157 states. [2023-12-21 13:28:56,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609157 to 608912. [2023-12-21 13:28:56,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608912 states, 608911 states have (on average 1.3115036516009728) internal successors, (798589), 608911 states have internal predecessors, (798589), 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) [2023-12-21 13:28:58,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608912 states to 608912 states and 798589 transitions. [2023-12-21 13:28:58,507 INFO L78 Accepts]: Start accepts. Automaton has 608912 states and 798589 transitions. Word has length 83 [2023-12-21 13:28:58,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:28:58,508 INFO L495 AbstractCegarLoop]: Abstraction has 608912 states and 798589 transitions. [2023-12-21 13:28:58,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2023-12-21 13:28:58,508 INFO L276 IsEmpty]: Start isEmpty. Operand 608912 states and 798589 transitions. [2023-12-21 13:28:58,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-21 13:28:58,533 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:28:58,533 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:28:58,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-12-21 13:28:58,533 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:28:58,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:28:58,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1669724562, now seen corresponding path program 1 times [2023-12-21 13:28:58,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:28:58,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612562452] [2023-12-21 13:28:58,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:28:58,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:28:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:28:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:28:58,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:28:58,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612562452] [2023-12-21 13:28:58,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612562452] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 13:28:58,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212388798] [2023-12-21 13:28:58,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:28:58,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 13:28:58,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 13:28:58,597 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) [2023-12-21 13:28:58,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-21 13:28:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:28:58,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 13:28:58,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 13:28:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:28:58,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 13:28:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:28:58,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212388798] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 13:28:58,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 13:28:58,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-12-21 13:28:58,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811468088] [2023-12-21 13:28:58,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 13:28:58,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-21 13:28:58,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:28:58,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-21 13:28:58,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-12-21 13:28:58,967 INFO L87 Difference]: Start difference. First operand 608912 states and 798589 transitions. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 10 states have internal predecessors, (147), 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) [2023-12-21 13:29:03,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:29:03,372 INFO L93 Difference]: Finished difference Result 1329886 states and 1738641 transitions. [2023-12-21 13:29:03,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 13:29:03,373 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 10 states have internal predecessors, (147), 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 84 [2023-12-21 13:29:03,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:29:06,347 INFO L225 Difference]: With dead ends: 1329886 [2023-12-21 13:29:06,347 INFO L226 Difference]: Without dead ends: 1085116 [2023-12-21 13:29:06,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 158 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-12-21 13:29:06,565 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 2547 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2547 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 13:29:06,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2547 Valid, 335 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 13:29:07,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085116 states. [2023-12-21 13:29:16,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085116 to 663293. [2023-12-21 13:29:16,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663293 states, 663292 states have (on average 1.3107424784257913) internal successors, (869405), 663292 states have internal predecessors, (869405), 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) [2023-12-21 13:29:18,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663293 states to 663293 states and 869405 transitions. [2023-12-21 13:29:18,629 INFO L78 Accepts]: Start accepts. Automaton has 663293 states and 869405 transitions. Word has length 84 [2023-12-21 13:29:18,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:29:18,629 INFO L495 AbstractCegarLoop]: Abstraction has 663293 states and 869405 transitions. [2023-12-21 13:29:18,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 10 states have internal predecessors, (147), 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) [2023-12-21 13:29:18,630 INFO L276 IsEmpty]: Start isEmpty. Operand 663293 states and 869405 transitions. [2023-12-21 13:29:18,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-21 13:29:18,657 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:29:18,657 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:29:18,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-21 13:29:18,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 13:29:18,862 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:29:18,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:29:18,863 INFO L85 PathProgramCache]: Analyzing trace with hash 343188138, now seen corresponding path program 1 times [2023-12-21 13:29:18,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:29:18,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476591028] [2023-12-21 13:29:18,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:29:18,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:29:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:29:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 13:29:18,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:29:18,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476591028] [2023-12-21 13:29:18,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476591028] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 13:29:18,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 13:29:18,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 13:29:18,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895110321] [2023-12-21 13:29:18,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 13:29:18,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 13:29:18,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:29:18,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 13:29:18,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 13:29:18,896 INFO L87 Difference]: Start difference. First operand 663293 states and 869405 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2023-12-21 13:29:23,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:29:23,124 INFO L93 Difference]: Finished difference Result 1268873 states and 1665470 transitions. [2023-12-21 13:29:23,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 13:29:23,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 85 [2023-12-21 13:29:23,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:29:24,724 INFO L225 Difference]: With dead ends: 1268873 [2023-12-21 13:29:24,724 INFO L226 Difference]: Without dead ends: 606634 [2023-12-21 13:29:25,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 13:29:25,256 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 102 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 13:29:25,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 170 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 13:29:25,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606634 states. [2023-12-21 13:29:31,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606634 to 581011. [2023-12-21 13:29:32,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581011 states, 581010 states have (on average 1.29754565325898) internal successors, (753887), 581010 states have internal predecessors, (753887), 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) [2023-12-21 13:29:34,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581011 states to 581011 states and 753887 transitions. [2023-12-21 13:29:34,207 INFO L78 Accepts]: Start accepts. Automaton has 581011 states and 753887 transitions. Word has length 85 [2023-12-21 13:29:34,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:29:34,207 INFO L495 AbstractCegarLoop]: Abstraction has 581011 states and 753887 transitions. [2023-12-21 13:29:34,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2023-12-21 13:29:34,207 INFO L276 IsEmpty]: Start isEmpty. Operand 581011 states and 753887 transitions. [2023-12-21 13:29:34,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-21 13:29:34,216 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:29:34,216 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:29:34,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-12-21 13:29:34,217 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:29:34,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:29:34,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1524507388, now seen corresponding path program 1 times [2023-12-21 13:29:34,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:29:34,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624740031] [2023-12-21 13:29:34,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:29:34,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:29:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:29:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:29:34,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:29:34,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624740031] [2023-12-21 13:29:34,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624740031] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 13:29:34,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105999834] [2023-12-21 13:29:34,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:29:34,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 13:29:34,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 13:29:34,290 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) [2023-12-21 13:29:34,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-21 13:29:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:29:34,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 13:29:34,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 13:29:34,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:29:34,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 13:29:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:29:34,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105999834] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 13:29:34,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 13:29:34,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-12-21 13:29:34,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963468862] [2023-12-21 13:29:34,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 13:29:34,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-21 13:29:34,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:29:34,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-21 13:29:34,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-12-21 13:29:34,619 INFO L87 Difference]: Start difference. First operand 581011 states and 753887 transitions. Second operand has 11 states, 11 states have (on average 13.181818181818182) internal successors, (145), 10 states have internal predecessors, (145), 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) [2023-12-21 13:29:39,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:29:39,183 INFO L93 Difference]: Finished difference Result 1350806 states and 1747384 transitions. [2023-12-21 13:29:39,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 13:29:39,183 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.181818181818182) internal successors, (145), 10 states have internal predecessors, (145), 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 85 [2023-12-21 13:29:39,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:29:41,833 INFO L225 Difference]: With dead ends: 1350806 [2023-12-21 13:29:41,833 INFO L226 Difference]: Without dead ends: 844012 [2023-12-21 13:29:42,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 160 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-12-21 13:29:42,382 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 2018 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2018 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 13:29:42,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2018 Valid, 276 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 13:29:43,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844012 states. [2023-12-21 13:29:50,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844012 to 590069. [2023-12-21 13:29:51,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590069 states, 590068 states have (on average 1.2904173756245043) internal successors, (761434), 590068 states have internal predecessors, (761434), 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) [2023-12-21 13:29:52,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590069 states to 590069 states and 761434 transitions. [2023-12-21 13:29:52,678 INFO L78 Accepts]: Start accepts. Automaton has 590069 states and 761434 transitions. Word has length 85 [2023-12-21 13:29:52,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:29:52,678 INFO L495 AbstractCegarLoop]: Abstraction has 590069 states and 761434 transitions. [2023-12-21 13:29:52,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.181818181818182) internal successors, (145), 10 states have internal predecessors, (145), 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) [2023-12-21 13:29:52,678 INFO L276 IsEmpty]: Start isEmpty. Operand 590069 states and 761434 transitions. [2023-12-21 13:29:52,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-21 13:29:52,687 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:29:52,688 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:29:52,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-21 13:29:52,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-21 13:29:52,894 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:29:52,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:29:52,894 INFO L85 PathProgramCache]: Analyzing trace with hash -2083007958, now seen corresponding path program 1 times [2023-12-21 13:29:52,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:29:52,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271089384] [2023-12-21 13:29:52,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:29:52,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:29:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:29:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:29:53,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:29:53,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271089384] [2023-12-21 13:29:53,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271089384] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 13:29:53,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192975436] [2023-12-21 13:29:53,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:29:53,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 13:29:53,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 13:29:53,439 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) [2023-12-21 13:29:53,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-21 13:29:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:29:53,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-21 13:29:53,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 13:29:53,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:29:53,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 13:29:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:29:54,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192975436] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 13:29:54,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 13:29:54,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-12-21 13:29:54,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732667610] [2023-12-21 13:29:54,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 13:29:54,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-21 13:29:54,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:29:54,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-21 13:29:54,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-12-21 13:29:54,251 INFO L87 Difference]: Start difference. First operand 590069 states and 761434 transitions. Second operand has 20 states, 20 states have (on average 9.8) internal successors, (196), 19 states have internal predecessors, (196), 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) [2023-12-21 13:30:03,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 13:30:03,337 INFO L93 Difference]: Finished difference Result 2356351 states and 3019704 transitions. [2023-12-21 13:30:03,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-21 13:30:03,337 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 9.8) internal successors, (196), 19 states have internal predecessors, (196), 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 85 [2023-12-21 13:30:03,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 13:30:08,979 INFO L225 Difference]: With dead ends: 2356351 [2023-12-21 13:30:08,979 INFO L226 Difference]: Without dead ends: 2080940 [2023-12-21 13:30:09,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2023-12-21 13:30:09,758 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 2707 mSDsluCounter, 2267 mSDsCounter, 0 mSdLazyCounter, 1809 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2707 SdHoareTripleChecker+Valid, 2523 SdHoareTripleChecker+Invalid, 1823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-21 13:30:09,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2707 Valid, 2523 Invalid, 1823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1809 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-21 13:30:11,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080940 states. [2023-12-21 13:30:26,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080940 to 873070. [2023-12-21 13:30:27,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873070 states, 873069 states have (on average 1.2873839295634137) internal successors, (1123975), 873069 states have internal predecessors, (1123975), 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) [2023-12-21 13:30:31,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873070 states to 873070 states and 1123975 transitions. [2023-12-21 13:30:31,702 INFO L78 Accepts]: Start accepts. Automaton has 873070 states and 1123975 transitions. Word has length 85 [2023-12-21 13:30:31,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 13:30:31,702 INFO L495 AbstractCegarLoop]: Abstraction has 873070 states and 1123975 transitions. [2023-12-21 13:30:31,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.8) internal successors, (196), 19 states have internal predecessors, (196), 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) [2023-12-21 13:30:31,702 INFO L276 IsEmpty]: Start isEmpty. Operand 873070 states and 1123975 transitions. [2023-12-21 13:30:31,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-21 13:30:31,712 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 13:30:31,712 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 13:30:31,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-21 13:30:31,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-21 13:30:31,916 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 13:30:31,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 13:30:31,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1374286566, now seen corresponding path program 1 times [2023-12-21 13:30:31,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 13:30:31,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429379816] [2023-12-21 13:30:31,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:30:31,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 13:30:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:30:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:30:32,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 13:30:32,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429379816] [2023-12-21 13:30:32,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429379816] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 13:30:32,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744635511] [2023-12-21 13:30:32,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 13:30:32,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 13:30:32,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 13:30:32,114 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) [2023-12-21 13:30:32,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-21 13:30:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 13:30:32,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-21 13:30:32,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 13:30:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:30:32,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 13:30:33,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 13:30:33,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744635511] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 13:30:33,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 13:30:33,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-12-21 13:30:33,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215695130] [2023-12-21 13:30:33,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 13:30:33,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-21 13:30:33,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 13:30:33,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-21 13:30:33,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-12-21 13:30:33,464 INFO L87 Difference]: Start difference. First operand 873070 states and 1123975 transitions. Second operand has 20 states, 20 states have (on average 10.6) internal successors, (212), 19 states have internal predecessors, (212), 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)