/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/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 [2023-12-20 02:51:32,538 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 02:51:32,604 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 02:51:32,607 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 02:51:32,607 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 02:51:32,622 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 02:51:32,622 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 02:51:32,623 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 02:51:32,623 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 02:51:32,623 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 02:51:32,623 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 02:51:32,624 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 02:51:32,624 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 02:51:32,624 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 02:51:32,624 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 02:51:32,625 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 02:51:32,625 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 02:51:32,625 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 02:51:32,625 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 02:51:32,626 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 02:51:32,626 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 02:51:32,629 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 02:51:32,629 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 02:51:32,629 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 02:51:32,629 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 02:51:32,629 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 02:51:32,630 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 02:51:32,630 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 02:51:32,630 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 02:51:32,630 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 02:51:32,630 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 02:51:32,631 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 02:51:32,631 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 02:51:32,631 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 02:51:32,631 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 02:51:32,631 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 02:51:32,632 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 02:51:32,634 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 02:51:32,635 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 02:51:32,635 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 02:51:32,635 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 02:51:32,635 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 02:51:32,635 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 02:51:32,635 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-20 02:51:32,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 02:51:32,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 02:51:32,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 02:51:32,848 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 02:51:32,849 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 02:51:32,850 INFO L431 ainManager$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 [2023-12-20 02:51:33,930 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 02:51:34,057 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 02:51:34,057 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 [2023-12-20 02:51:34,064 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/566a9dfb1/609a3464ade744a49eddba3c71308b56/FLAGe61b9f359 [2023-12-20 02:51:34,074 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/566a9dfb1/609a3464ade744a49eddba3c71308b56 [2023-12-20 02:51:34,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 02:51:34,076 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 02:51:34,077 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 02:51:34,077 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 02:51:34,080 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 02:51:34,080 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 02:51:34" (1/1) ... [2023-12-20 02:51:34,081 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@278b838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:51:34, skipping insertion in model container [2023-12-20 02:51:34,081 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 02:51:34" (1/1) ... [2023-12-20 02:51:34,106 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 02:51:34,252 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] [2023-12-20 02:51:34,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 02:51:34,285 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 02:51:34,326 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] [2023-12-20 02:51:34,358 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 02:51:34,370 INFO L206 MainTranslator]: Completed translation [2023-12-20 02:51:34,371 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:51:34 WrapperNode [2023-12-20 02:51:34,371 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 02:51:34,372 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 02:51:34,372 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 02:51:34,372 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 02:51:34,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:51:34" (1/1) ... [2023-12-20 02:51:34,385 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:51:34" (1/1) ... [2023-12-20 02:51:34,415 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 444 [2023-12-20 02:51:34,415 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 02:51:34,416 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 02:51:34,416 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 02:51:34,416 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 02:51:34,430 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:51:34" (1/1) ... [2023-12-20 02:51:34,430 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:51:34" (1/1) ... [2023-12-20 02:51:34,433 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:51:34" (1/1) ... [2023-12-20 02:51:34,445 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]. [2023-12-20 02:51:34,445 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:51:34" (1/1) ... [2023-12-20 02:51:34,445 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:51:34" (1/1) ... [2023-12-20 02:51:34,450 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:51:34" (1/1) ... [2023-12-20 02:51:34,453 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:51:34" (1/1) ... [2023-12-20 02:51:34,454 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:51:34" (1/1) ... [2023-12-20 02:51:34,456 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:51:34" (1/1) ... [2023-12-20 02:51:34,458 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 02:51:34,459 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 02:51:34,459 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 02:51:34,459 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 02:51:34,460 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:51:34" (1/1) ... [2023-12-20 02:51:34,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 02:51:34,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 02:51:34,484 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) [2023-12-20 02:51:34,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 02:51:34,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 02:51:34,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 02:51:34,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 02:51:34,500 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 [2023-12-20 02:51:34,584 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 02:51:34,585 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 02:51:34,912 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 02:51:34,969 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 02:51:34,969 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-20 02:51:34,969 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 02:51:34 BoogieIcfgContainer [2023-12-20 02:51:34,969 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 02:51:34,971 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 02:51:34,971 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 02:51:34,973 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 02:51:34,974 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 02:51:34" (1/3) ... [2023-12-20 02:51:34,974 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cdf8aa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 02:51:34, skipping insertion in model container [2023-12-20 02:51:34,974 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:51:34" (2/3) ... [2023-12-20 02:51:34,974 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cdf8aa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 02:51:34, skipping insertion in model container [2023-12-20 02:51:34,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 02:51:34" (3/3) ... [2023-12-20 02:51:34,975 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-12-20 02:51:34,990 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 02:51:34,991 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 02:51:35,042 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 02:51:35,048 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;@b2dcc20, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 02:51:35,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 02:51:35,053 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) [2023-12-20 02:51:35,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-20 02:51:35,062 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:51:35,064 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] [2023-12-20 02:51:35,064 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:51:35,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:51:35,074 INFO L85 PathProgramCache]: Analyzing trace with hash -813563245, now seen corresponding path program 1 times [2023-12-20 02:51:35,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:51:35,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101604806] [2023-12-20 02:51:35,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:51:35,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:51:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:51:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:51:35,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:51:35,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101604806] [2023-12-20 02:51:35,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101604806] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 02:51:35,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 02:51:35,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 02:51:35,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012986134] [2023-12-20 02:51:35,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 02:51:35,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 02:51:35,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:51:35,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 02:51:35,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 02:51:35,378 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) [2023-12-20 02:51:35,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:51:35,444 INFO L93 Difference]: Finished difference Result 247 states and 397 transitions. [2023-12-20 02:51:35,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 02:51:35,448 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 [2023-12-20 02:51:35,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:51:35,456 INFO L225 Difference]: With dead ends: 247 [2023-12-20 02:51:35,456 INFO L226 Difference]: Without dead ends: 164 [2023-12-20 02:51:35,459 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 [2023-12-20 02:51:35,462 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 [2023-12-20 02:51:35,463 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] [2023-12-20 02:51:35,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-12-20 02:51:35,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2023-12-20 02:51:35,505 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) [2023-12-20 02:51:35,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 242 transitions. [2023-12-20 02:51:35,513 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 242 transitions. Word has length 47 [2023-12-20 02:51:35,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:51:35,514 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 242 transitions. [2023-12-20 02:51:35,514 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) [2023-12-20 02:51:35,514 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 242 transitions. [2023-12-20 02:51:35,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-20 02:51:35,515 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:51:35,515 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] [2023-12-20 02:51:35,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 02:51:35,515 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:51:35,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:51:35,516 INFO L85 PathProgramCache]: Analyzing trace with hash -2090397033, now seen corresponding path program 1 times [2023-12-20 02:51:35,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:51:35,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224297962] [2023-12-20 02:51:35,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:51:35,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:51:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:51:35,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:51:35,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:51:35,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224297962] [2023-12-20 02:51:35,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224297962] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 02:51:35,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 02:51:35,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 02:51:35,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481170532] [2023-12-20 02:51:35,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 02:51:35,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 02:51:35,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:51:35,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 02:51:35,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 02:51:35,684 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) [2023-12-20 02:51:35,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:51:35,709 INFO L93 Difference]: Finished difference Result 402 states and 622 transitions. [2023-12-20 02:51:35,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 02:51:35,716 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 [2023-12-20 02:51:35,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:51:35,718 INFO L225 Difference]: With dead ends: 402 [2023-12-20 02:51:35,718 INFO L226 Difference]: Without dead ends: 266 [2023-12-20 02:51:35,718 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 [2023-12-20 02:51:35,719 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 [2023-12-20 02:51:35,720 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] [2023-12-20 02:51:35,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-12-20 02:51:35,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2023-12-20 02:51:35,727 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) [2023-12-20 02:51:35,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 403 transitions. [2023-12-20 02:51:35,733 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 403 transitions. Word has length 48 [2023-12-20 02:51:35,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:51:35,734 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 403 transitions. [2023-12-20 02:51:35,734 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) [2023-12-20 02:51:35,734 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 403 transitions. [2023-12-20 02:51:35,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-20 02:51:35,736 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:51:35,736 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] [2023-12-20 02:51:35,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-20 02:51:35,737 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:51:35,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:51:35,737 INFO L85 PathProgramCache]: Analyzing trace with hash -2059387344, now seen corresponding path program 1 times [2023-12-20 02:51:35,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:51:35,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767717568] [2023-12-20 02:51:35,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:51:35,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:51:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:51:35,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:51:35,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:51:35,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767717568] [2023-12-20 02:51:35,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767717568] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 02:51:35,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 02:51:35,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 02:51:35,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633647126] [2023-12-20 02:51:35,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 02:51:35,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 02:51:35,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:51:35,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 02:51:35,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 02:51:35,850 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) [2023-12-20 02:51:35,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:51:35,876 INFO L93 Difference]: Finished difference Result 676 states and 1053 transitions. [2023-12-20 02:51:35,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 02:51:35,876 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 [2023-12-20 02:51:35,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:51:35,878 INFO L225 Difference]: With dead ends: 676 [2023-12-20 02:51:35,878 INFO L226 Difference]: Without dead ends: 438 [2023-12-20 02:51:35,879 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 [2023-12-20 02:51:35,880 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 [2023-12-20 02:51:35,880 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] [2023-12-20 02:51:35,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2023-12-20 02:51:35,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 436. [2023-12-20 02:51:35,895 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) [2023-12-20 02:51:35,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 671 transitions. [2023-12-20 02:51:35,902 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 671 transitions. Word has length 49 [2023-12-20 02:51:35,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:51:35,906 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 671 transitions. [2023-12-20 02:51:35,906 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) [2023-12-20 02:51:35,906 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 671 transitions. [2023-12-20 02:51:35,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-20 02:51:35,907 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:51:35,907 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] [2023-12-20 02:51:35,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-20 02:51:35,908 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:51:35,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:51:35,908 INFO L85 PathProgramCache]: Analyzing trace with hash 343137598, now seen corresponding path program 1 times [2023-12-20 02:51:35,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:51:35,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446142313] [2023-12-20 02:51:35,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:51:35,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:51:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:51:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:51:36,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:51:36,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446142313] [2023-12-20 02:51:36,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446142313] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 02:51:36,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 02:51:36,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 02:51:36,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662913550] [2023-12-20 02:51:36,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 02:51:36,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 02:51:36,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:51:36,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 02:51:36,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-20 02:51:36,027 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) [2023-12-20 02:51:36,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:51:36,147 INFO L93 Difference]: Finished difference Result 2486 states and 3896 transitions. [2023-12-20 02:51:36,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 02:51:36,147 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 [2023-12-20 02:51:36,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:51:36,155 INFO L225 Difference]: With dead ends: 2486 [2023-12-20 02:51:36,156 INFO L226 Difference]: Without dead ends: 2076 [2023-12-20 02:51:36,162 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 [2023-12-20 02:51:36,169 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, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 02:51:36,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [953 Valid, 1084 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 02:51:36,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2023-12-20 02:51:36,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 844. [2023-12-20 02:51:36,215 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) [2023-12-20 02:51:36,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1299 transitions. [2023-12-20 02:51:36,217 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1299 transitions. Word has length 50 [2023-12-20 02:51:36,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:51:36,217 INFO L495 AbstractCegarLoop]: Abstraction has 844 states and 1299 transitions. [2023-12-20 02:51:36,218 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) [2023-12-20 02:51:36,218 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1299 transitions. [2023-12-20 02:51:36,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-20 02:51:36,219 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:51:36,219 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] [2023-12-20 02:51:36,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-20 02:51:36,219 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:51:36,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:51:36,219 INFO L85 PathProgramCache]: Analyzing trace with hash 2027874669, now seen corresponding path program 1 times [2023-12-20 02:51:36,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:51:36,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600444653] [2023-12-20 02:51:36,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:51:36,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:51:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:51:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:51:36,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:51:36,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600444653] [2023-12-20 02:51:36,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600444653] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 02:51:36,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 02:51:36,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 02:51:36,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942421978] [2023-12-20 02:51:36,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 02:51:36,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 02:51:36,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:51:36,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 02:51:36,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-12-20 02:51:36,385 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) [2023-12-20 02:51:36,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:51:36,458 INFO L93 Difference]: Finished difference Result 3708 states and 5719 transitions. [2023-12-20 02:51:36,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 02:51:36,459 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 [2023-12-20 02:51:36,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:51:36,468 INFO L225 Difference]: With dead ends: 3708 [2023-12-20 02:51:36,468 INFO L226 Difference]: Without dead ends: 2890 [2023-12-20 02:51:36,470 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 [2023-12-20 02:51:36,470 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, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 02:51:36,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 697 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 02:51:36,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2890 states. [2023-12-20 02:51:36,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2890 to 2884. [2023-12-20 02:51:36,506 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) [2023-12-20 02:51:36,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2884 states to 2884 states and 4427 transitions. [2023-12-20 02:51:36,513 INFO L78 Accepts]: Start accepts. Automaton has 2884 states and 4427 transitions. Word has length 51 [2023-12-20 02:51:36,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:51:36,514 INFO L495 AbstractCegarLoop]: Abstraction has 2884 states and 4427 transitions. [2023-12-20 02:51:36,514 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) [2023-12-20 02:51:36,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2884 states and 4427 transitions. [2023-12-20 02:51:36,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-20 02:51:36,519 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:51:36,520 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] [2023-12-20 02:51:36,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-20 02:51:36,520 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:51:36,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:51:36,521 INFO L85 PathProgramCache]: Analyzing trace with hash 994594015, now seen corresponding path program 1 times [2023-12-20 02:51:36,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:51:36,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33085327] [2023-12-20 02:51:36,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:51:36,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:51:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:51:36,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:51:36,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:51:36,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33085327] [2023-12-20 02:51:36,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33085327] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 02:51:36,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 02:51:36,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 02:51:36,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832150479] [2023-12-20 02:51:36,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 02:51:36,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 02:51:36,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:51:36,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 02:51:36,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 02:51:36,585 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) [2023-12-20 02:51:36,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:51:36,617 INFO L93 Difference]: Finished difference Result 7768 states and 11885 transitions. [2023-12-20 02:51:36,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 02:51:36,618 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 [2023-12-20 02:51:36,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:51:36,632 INFO L225 Difference]: With dead ends: 7768 [2023-12-20 02:51:36,632 INFO L226 Difference]: Without dead ends: 4910 [2023-12-20 02:51:36,637 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 [2023-12-20 02:51:36,639 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 [2023-12-20 02:51:36,639 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] [2023-12-20 02:51:36,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4910 states. [2023-12-20 02:51:36,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4910 to 4908. [2023-12-20 02:51:36,709 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) [2023-12-20 02:51:36,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4908 states to 4908 states and 7419 transitions. [2023-12-20 02:51:36,725 INFO L78 Accepts]: Start accepts. Automaton has 4908 states and 7419 transitions. Word has length 53 [2023-12-20 02:51:36,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:51:36,725 INFO L495 AbstractCegarLoop]: Abstraction has 4908 states and 7419 transitions. [2023-12-20 02:51:36,725 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) [2023-12-20 02:51:36,725 INFO L276 IsEmpty]: Start isEmpty. Operand 4908 states and 7419 transitions. [2023-12-20 02:51:36,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-20 02:51:36,726 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:51:36,726 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] [2023-12-20 02:51:36,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-20 02:51:36,726 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:51:36,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:51:36,727 INFO L85 PathProgramCache]: Analyzing trace with hash 200165270, now seen corresponding path program 1 times [2023-12-20 02:51:36,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:51:36,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665586741] [2023-12-20 02:51:36,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:51:36,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:51:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:51:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:51:36,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:51:36,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665586741] [2023-12-20 02:51:36,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665586741] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 02:51:36,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 02:51:36,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 02:51:36,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216974200] [2023-12-20 02:51:36,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 02:51:36,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 02:51:36,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:51:36,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 02:51:36,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 02:51:36,883 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) [2023-12-20 02:51:37,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:51:37,049 INFO L93 Difference]: Finished difference Result 14672 states and 22205 transitions. [2023-12-20 02:51:37,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 02:51:37,050 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 [2023-12-20 02:51:37,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:51:37,077 INFO L225 Difference]: With dead ends: 14672 [2023-12-20 02:51:37,077 INFO L226 Difference]: Without dead ends: 9790 [2023-12-20 02:51:37,086 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 [2023-12-20 02:51:37,087 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 [2023-12-20 02:51:37,087 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] [2023-12-20 02:51:37,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9790 states. [2023-12-20 02:51:37,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9790 to 9788. [2023-12-20 02:51:37,227 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) [2023-12-20 02:51:37,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9788 states to 9788 states and 14715 transitions. [2023-12-20 02:51:37,252 INFO L78 Accepts]: Start accepts. Automaton has 9788 states and 14715 transitions. Word has length 53 [2023-12-20 02:51:37,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:51:37,253 INFO L495 AbstractCegarLoop]: Abstraction has 9788 states and 14715 transitions. [2023-12-20 02:51:37,253 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) [2023-12-20 02:51:37,253 INFO L276 IsEmpty]: Start isEmpty. Operand 9788 states and 14715 transitions. [2023-12-20 02:51:37,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-20 02:51:37,253 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:51:37,254 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] [2023-12-20 02:51:37,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-20 02:51:37,254 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:51:37,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:51:37,255 INFO L85 PathProgramCache]: Analyzing trace with hash -614246725, now seen corresponding path program 1 times [2023-12-20 02:51:37,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:51:37,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811785466] [2023-12-20 02:51:37,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:51:37,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:51:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:51:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:51:37,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:51:37,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811785466] [2023-12-20 02:51:37,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811785466] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 02:51:37,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 02:51:37,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 02:51:37,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665239505] [2023-12-20 02:51:37,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 02:51:37,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 02:51:37,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:51:37,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 02:51:37,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 02:51:37,425 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) [2023-12-20 02:51:37,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:51:37,510 INFO L93 Difference]: Finished difference Result 20062 states and 29916 transitions. [2023-12-20 02:51:37,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 02:51:37,511 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 [2023-12-20 02:51:37,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:51:37,560 INFO L225 Difference]: With dead ends: 20062 [2023-12-20 02:51:37,560 INFO L226 Difference]: Without dead ends: 20060 [2023-12-20 02:51:37,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-20 02:51:37,570 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 [2023-12-20 02:51:37,570 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] [2023-12-20 02:51:37,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20060 states. [2023-12-20 02:51:37,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20060 to 10300. [2023-12-20 02:51:37,765 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) [2023-12-20 02:51:37,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10300 states to 10300 states and 15227 transitions. [2023-12-20 02:51:37,780 INFO L78 Accepts]: Start accepts. Automaton has 10300 states and 15227 transitions. Word has length 53 [2023-12-20 02:51:37,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:51:37,780 INFO L495 AbstractCegarLoop]: Abstraction has 10300 states and 15227 transitions. [2023-12-20 02:51:37,780 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) [2023-12-20 02:51:37,781 INFO L276 IsEmpty]: Start isEmpty. Operand 10300 states and 15227 transitions. [2023-12-20 02:51:37,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-20 02:51:37,781 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:51:37,781 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] [2023-12-20 02:51:37,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-20 02:51:37,781 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:51:37,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:51:37,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1851206240, now seen corresponding path program 1 times [2023-12-20 02:51:37,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:51:37,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703786076] [2023-12-20 02:51:37,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:51:37,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:51:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:51:37,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:51:37,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:51:37,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703786076] [2023-12-20 02:51:37,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703786076] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 02:51:37,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 02:51:37,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 02:51:37,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136724674] [2023-12-20 02:51:37,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 02:51:37,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 02:51:37,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:51:37,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 02:51:37,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 02:51:37,870 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) [2023-12-20 02:51:37,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:51:37,934 INFO L93 Difference]: Finished difference Result 25042 states and 37003 transitions. [2023-12-20 02:51:37,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 02:51:37,934 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 [2023-12-20 02:51:37,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:51:37,959 INFO L225 Difference]: With dead ends: 25042 [2023-12-20 02:51:37,959 INFO L226 Difference]: Without dead ends: 14768 [2023-12-20 02:51:37,971 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 [2023-12-20 02:51:37,974 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 [2023-12-20 02:51:37,975 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] [2023-12-20 02:51:37,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14768 states. [2023-12-20 02:51:38,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14768 to 14654. [2023-12-20 02:51:38,144 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) [2023-12-20 02:51:38,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14654 states to 14654 states and 21465 transitions. [2023-12-20 02:51:38,251 INFO L78 Accepts]: Start accepts. Automaton has 14654 states and 21465 transitions. Word has length 54 [2023-12-20 02:51:38,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:51:38,251 INFO L495 AbstractCegarLoop]: Abstraction has 14654 states and 21465 transitions. [2023-12-20 02:51:38,251 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) [2023-12-20 02:51:38,251 INFO L276 IsEmpty]: Start isEmpty. Operand 14654 states and 21465 transitions. [2023-12-20 02:51:38,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-20 02:51:38,254 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:51:38,255 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] [2023-12-20 02:51:38,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-20 02:51:38,255 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:51:38,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:51:38,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1774240818, now seen corresponding path program 1 times [2023-12-20 02:51:38,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:51:38,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751962400] [2023-12-20 02:51:38,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:51:38,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:51:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:51:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:51:38,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:51:38,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751962400] [2023-12-20 02:51:38,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751962400] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 02:51:38,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 02:51:38,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 02:51:38,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301153871] [2023-12-20 02:51:38,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 02:51:38,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 02:51:38,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:51:38,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 02:51:38,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 02:51:38,301 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) [2023-12-20 02:51:38,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:51:38,415 INFO L93 Difference]: Finished difference Result 28164 states and 41181 transitions. [2023-12-20 02:51:38,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 02:51:38,416 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 [2023-12-20 02:51:38,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:51:38,441 INFO L225 Difference]: With dead ends: 28164 [2023-12-20 02:51:38,441 INFO L226 Difference]: Without dead ends: 20098 [2023-12-20 02:51:38,450 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 [2023-12-20 02:51:38,451 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 [2023-12-20 02:51:38,452 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] [2023-12-20 02:51:38,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20098 states. [2023-12-20 02:51:38,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20098 to 18848. [2023-12-20 02:51:38,669 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) [2023-12-20 02:51:38,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18848 states to 18848 states and 27255 transitions. [2023-12-20 02:51:38,697 INFO L78 Accepts]: Start accepts. Automaton has 18848 states and 27255 transitions. Word has length 76 [2023-12-20 02:51:38,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:51:38,698 INFO L495 AbstractCegarLoop]: Abstraction has 18848 states and 27255 transitions. [2023-12-20 02:51:38,698 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) [2023-12-20 02:51:38,698 INFO L276 IsEmpty]: Start isEmpty. Operand 18848 states and 27255 transitions. [2023-12-20 02:51:38,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-20 02:51:38,703 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:51:38,703 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] [2023-12-20 02:51:38,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-20 02:51:38,703 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:51:38,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:51:38,704 INFO L85 PathProgramCache]: Analyzing trace with hash 644043701, now seen corresponding path program 1 times [2023-12-20 02:51:38,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:51:38,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133819477] [2023-12-20 02:51:38,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:51:38,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:51:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:51:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:51:38,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:51:38,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133819477] [2023-12-20 02:51:38,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133819477] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 02:51:38,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 02:51:38,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 02:51:38,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647879766] [2023-12-20 02:51:38,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 02:51:38,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 02:51:38,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:51:38,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 02:51:38,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 02:51:38,803 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) [2023-12-20 02:51:38,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:51:38,875 INFO L93 Difference]: Finished difference Result 29471 states and 42418 transitions. [2023-12-20 02:51:38,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 02:51:38,876 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 [2023-12-20 02:51:38,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:51:38,902 INFO L225 Difference]: With dead ends: 29471 [2023-12-20 02:51:38,902 INFO L226 Difference]: Without dead ends: 19980 [2023-12-20 02:51:38,915 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 [2023-12-20 02:51:38,916 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 [2023-12-20 02:51:38,916 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] [2023-12-20 02:51:38,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19980 states. [2023-12-20 02:51:39,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19980 to 19255. [2023-12-20 02:51:39,143 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) [2023-12-20 02:51:39,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19255 states to 19255 states and 27384 transitions. [2023-12-20 02:51:39,170 INFO L78 Accepts]: Start accepts. Automaton has 19255 states and 27384 transitions. Word has length 76 [2023-12-20 02:51:39,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:51:39,170 INFO L495 AbstractCegarLoop]: Abstraction has 19255 states and 27384 transitions. [2023-12-20 02:51:39,170 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) [2023-12-20 02:51:39,171 INFO L276 IsEmpty]: Start isEmpty. Operand 19255 states and 27384 transitions. [2023-12-20 02:51:39,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-20 02:51:39,177 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:51:39,177 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] [2023-12-20 02:51:39,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-20 02:51:39,177 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:51:39,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:51:39,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1569217297, now seen corresponding path program 1 times [2023-12-20 02:51:39,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:51:39,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578249389] [2023-12-20 02:51:39,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:51:39,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:51:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:51:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 02:51:39,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:51:39,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578249389] [2023-12-20 02:51:39,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578249389] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 02:51:39,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 02:51:39,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 02:51:39,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416196806] [2023-12-20 02:51:39,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 02:51:39,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 02:51:39,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:51:39,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 02:51:39,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 02:51:39,347 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) [2023-12-20 02:51:39,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:51:39,499 INFO L93 Difference]: Finished difference Result 42705 states and 61533 transitions. [2023-12-20 02:51:39,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 02:51:39,500 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 [2023-12-20 02:51:39,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:51:39,548 INFO L225 Difference]: With dead ends: 42705 [2023-12-20 02:51:39,549 INFO L226 Difference]: Without dead ends: 34418 [2023-12-20 02:51:39,564 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 [2023-12-20 02:51:39,564 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 [2023-12-20 02:51:39,564 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] [2023-12-20 02:51:39,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34418 states. [2023-12-20 02:51:39,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34418 to 26262. [2023-12-20 02:51:40,025 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) [2023-12-20 02:51:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26262 states to 26262 states and 37381 transitions. [2023-12-20 02:51:40,070 INFO L78 Accepts]: Start accepts. Automaton has 26262 states and 37381 transitions. Word has length 76 [2023-12-20 02:51:40,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:51:40,070 INFO L495 AbstractCegarLoop]: Abstraction has 26262 states and 37381 transitions. [2023-12-20 02:51:40,070 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) [2023-12-20 02:51:40,070 INFO L276 IsEmpty]: Start isEmpty. Operand 26262 states and 37381 transitions. [2023-12-20 02:51:40,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-20 02:51:40,077 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:51:40,078 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] [2023-12-20 02:51:40,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-20 02:51:40,078 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:51:40,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:51:40,078 INFO L85 PathProgramCache]: Analyzing trace with hash 501121061, now seen corresponding path program 1 times [2023-12-20 02:51:40,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:51:40,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380906549] [2023-12-20 02:51:40,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:51:40,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:51:40,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:51:40,177 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-20 02:51:40,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:51:40,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380906549] [2023-12-20 02:51:40,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380906549] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 02:51:40,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 02:51:40,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 02:51:40,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73921983] [2023-12-20 02:51:40,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 02:51:40,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 02:51:40,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:51:40,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 02:51:40,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 02:51:40,179 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) [2023-12-20 02:51:40,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:51:40,323 INFO L93 Difference]: Finished difference Result 46157 states and 66434 transitions. [2023-12-20 02:51:40,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 02:51:40,323 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 [2023-12-20 02:51:40,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:51:40,488 INFO L225 Difference]: With dead ends: 46157 [2023-12-20 02:51:40,488 INFO L226 Difference]: Without dead ends: 40208 [2023-12-20 02:51:40,497 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 [2023-12-20 02:51:40,497 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 [2023-12-20 02:51:40,497 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] [2023-12-20 02:51:40,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40208 states. [2023-12-20 02:51:40,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40208 to 32070. [2023-12-20 02:51:40,838 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) [2023-12-20 02:51:40,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32070 states to 32070 states and 45701 transitions. [2023-12-20 02:51:40,879 INFO L78 Accepts]: Start accepts. Automaton has 32070 states and 45701 transitions. Word has length 76 [2023-12-20 02:51:40,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:51:40,879 INFO L495 AbstractCegarLoop]: Abstraction has 32070 states and 45701 transitions. [2023-12-20 02:51:40,879 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) [2023-12-20 02:51:40,879 INFO L276 IsEmpty]: Start isEmpty. Operand 32070 states and 45701 transitions. [2023-12-20 02:51:40,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-20 02:51:40,885 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:51:40,885 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] [2023-12-20 02:51:40,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-20 02:51:40,885 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:51:40,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:51:40,886 INFO L85 PathProgramCache]: Analyzing trace with hash 256605818, now seen corresponding path program 1 times [2023-12-20 02:51:40,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:51:40,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346083347] [2023-12-20 02:51:40,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:51:40,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:51:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:51:40,961 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-20 02:51:40,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:51:40,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346083347] [2023-12-20 02:51:40,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346083347] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 02:51:40,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 02:51:40,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 02:51:40,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417053120] [2023-12-20 02:51:40,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 02:51:40,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 02:51:40,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:51:40,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 02:51:40,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 02:51:40,963 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) [2023-12-20 02:51:41,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:51:41,241 INFO L93 Difference]: Finished difference Result 48034 states and 69036 transitions. [2023-12-20 02:51:41,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 02:51:41,244 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 [2023-12-20 02:51:41,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:51:41,331 INFO L225 Difference]: With dead ends: 48034 [2023-12-20 02:51:41,332 INFO L226 Difference]: Without dead ends: 44088 [2023-12-20 02:51:41,357 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 [2023-12-20 02:51:41,358 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 [2023-12-20 02:51:41,358 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] [2023-12-20 02:51:41,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44088 states. [2023-12-20 02:51:41,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44088 to 35950. [2023-12-20 02:51:41,891 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) [2023-12-20 02:51:41,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35950 states to 35950 states and 51269 transitions. [2023-12-20 02:51:41,956 INFO L78 Accepts]: Start accepts. Automaton has 35950 states and 51269 transitions. Word has length 76 [2023-12-20 02:51:41,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:51:41,956 INFO L495 AbstractCegarLoop]: Abstraction has 35950 states and 51269 transitions. [2023-12-20 02:51:41,956 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) [2023-12-20 02:51:41,956 INFO L276 IsEmpty]: Start isEmpty. Operand 35950 states and 51269 transitions. [2023-12-20 02:51:41,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-20 02:51:41,963 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:51:41,963 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] [2023-12-20 02:51:41,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-20 02:51:41,963 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:51:41,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:51:41,963 INFO L85 PathProgramCache]: Analyzing trace with hash 623948307, now seen corresponding path program 1 times [2023-12-20 02:51:41,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:51:41,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261448884] [2023-12-20 02:51:41,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:51:41,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:51:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:51:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:51:42,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:51:42,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261448884] [2023-12-20 02:51:42,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261448884] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 02:51:42,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820663749] [2023-12-20 02:51:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:51:42,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 02:51:42,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 02:51:42,228 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) [2023-12-20 02:51:42,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 02:51:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:51:42,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 02:51:42,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 02:51:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 02:51:42,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 02:51:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 02:51:42,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820663749] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 02:51:42,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 02:51:42,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 13 [2023-12-20 02:51:42,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013674236] [2023-12-20 02:51:42,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 02:51:42,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-20 02:51:42,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:51:42,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-20 02:51:42,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-12-20 02:51:42,717 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) [2023-12-20 02:51:50,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:51:50,106 INFO L93 Difference]: Finished difference Result 525099 states and 739084 transitions. [2023-12-20 02:51:50,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2023-12-20 02:51:50,107 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 [2023-12-20 02:51:50,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:51:51,046 INFO L225 Difference]: With dead ends: 525099 [2023-12-20 02:51:51,047 INFO L226 Difference]: Without dead ends: 487494 [2023-12-20 02:51:51,215 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 [2023-12-20 02:51:51,216 INFO L413 NwaCegarLoop]: 542 mSDtfsCounter, 8175 mSDsluCounter, 3597 mSDsCounter, 0 mSdLazyCounter, 3957 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.5s IncrementalHoareTripleChecker+Time [2023-12-20 02:51:51,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8175 Valid, 4139 Invalid, 4013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 3957 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-20 02:51:51,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487494 states. [2023-12-20 02:51:55,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487494 to 178199. [2023-12-20 02:51:55,294 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) [2023-12-20 02:51:55,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178199 states to 178199 states and 248582 transitions. [2023-12-20 02:51:55,573 INFO L78 Accepts]: Start accepts. Automaton has 178199 states and 248582 transitions. Word has length 77 [2023-12-20 02:51:55,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:51:55,573 INFO L495 AbstractCegarLoop]: Abstraction has 178199 states and 248582 transitions. [2023-12-20 02:51:55,574 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) [2023-12-20 02:51:55,574 INFO L276 IsEmpty]: Start isEmpty. Operand 178199 states and 248582 transitions. [2023-12-20 02:51:55,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-20 02:51:55,583 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:51:55,584 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] [2023-12-20 02:51:55,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-20 02:51:55,789 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 [2023-12-20 02:51:55,789 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:51:55,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:51:55,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1272026816, now seen corresponding path program 1 times [2023-12-20 02:51:55,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:51:55,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146672018] [2023-12-20 02:51:55,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:51:55,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:51:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:51:55,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:51:55,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:51:55,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146672018] [2023-12-20 02:51:55,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146672018] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 02:51:55,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 02:51:55,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 02:51:55,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760259720] [2023-12-20 02:51:55,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 02:51:55,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 02:51:55,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:51:55,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 02:51:55,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 02:51:55,829 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) [2023-12-20 02:51:57,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:51:57,682 INFO L93 Difference]: Finished difference Result 492364 states and 684307 transitions. [2023-12-20 02:51:57,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 02:51:57,683 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 [2023-12-20 02:51:57,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:51:58,189 INFO L225 Difference]: With dead ends: 492364 [2023-12-20 02:51:58,189 INFO L226 Difference]: Without dead ends: 328643 [2023-12-20 02:51:58,297 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 [2023-12-20 02:51:58,301 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 [2023-12-20 02:51:58,301 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] [2023-12-20 02:51:58,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328643 states. [2023-12-20 02:52:01,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328643 to 328454. [2023-12-20 02:52:02,316 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) [2023-12-20 02:52:03,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328454 states to 328454 states and 451445 transitions. [2023-12-20 02:52:03,338 INFO L78 Accepts]: Start accepts. Automaton has 328454 states and 451445 transitions. Word has length 78 [2023-12-20 02:52:03,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:52:03,338 INFO L495 AbstractCegarLoop]: Abstraction has 328454 states and 451445 transitions. [2023-12-20 02:52:03,338 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) [2023-12-20 02:52:03,338 INFO L276 IsEmpty]: Start isEmpty. Operand 328454 states and 451445 transitions. [2023-12-20 02:52:03,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-20 02:52:03,349 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:52:03,349 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] [2023-12-20 02:52:03,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-20 02:52:03,349 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:52:03,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:52:03,350 INFO L85 PathProgramCache]: Analyzing trace with hash -2114294557, now seen corresponding path program 1 times [2023-12-20 02:52:03,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:52:03,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421202871] [2023-12-20 02:52:03,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:52:03,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:52:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:52:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 02:52:03,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:52:03,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421202871] [2023-12-20 02:52:03,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421202871] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 02:52:03,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 02:52:03,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 02:52:03,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000930335] [2023-12-20 02:52:03,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 02:52:03,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 02:52:03,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:52:03,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 02:52:03,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 02:52:03,423 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) [2023-12-20 02:52:05,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:52:05,290 INFO L93 Difference]: Finished difference Result 544749 states and 754317 transitions. [2023-12-20 02:52:05,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 02:52:05,291 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 [2023-12-20 02:52:05,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:52:06,094 INFO L225 Difference]: With dead ends: 544749 [2023-12-20 02:52:06,095 INFO L226 Difference]: Without dead ends: 477395 [2023-12-20 02:52:06,210 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 [2023-12-20 02:52:06,210 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 [2023-12-20 02:52:06,210 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] [2023-12-20 02:52:06,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477395 states. [2023-12-20 02:52:10,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477395 to 382552. [2023-12-20 02:52:11,074 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) [2023-12-20 02:52:12,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382552 states to 382552 states and 525127 transitions. [2023-12-20 02:52:12,361 INFO L78 Accepts]: Start accepts. Automaton has 382552 states and 525127 transitions. Word has length 79 [2023-12-20 02:52:12,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:52:12,361 INFO L495 AbstractCegarLoop]: Abstraction has 382552 states and 525127 transitions. [2023-12-20 02:52:12,361 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) [2023-12-20 02:52:12,361 INFO L276 IsEmpty]: Start isEmpty. Operand 382552 states and 525127 transitions. [2023-12-20 02:52:12,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-20 02:52:12,372 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:52:12,372 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] [2023-12-20 02:52:12,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-20 02:52:12,373 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:52:12,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:52:12,373 INFO L85 PathProgramCache]: Analyzing trace with hash 457585236, now seen corresponding path program 1 times [2023-12-20 02:52:12,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:52:12,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218764113] [2023-12-20 02:52:12,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:52:12,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:52:12,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:52:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:52:12,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:52:12,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218764113] [2023-12-20 02:52:12,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218764113] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 02:52:12,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 02:52:12,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 02:52:12,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268105404] [2023-12-20 02:52:12,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 02:52:12,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 02:52:12,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:52:12,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 02:52:12,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 02:52:12,416 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) [2023-12-20 02:52:15,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:52:15,465 INFO L93 Difference]: Finished difference Result 882461 states and 1207736 transitions. [2023-12-20 02:52:15,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 02:52:15,466 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 [2023-12-20 02:52:15,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:52:16,724 INFO L225 Difference]: With dead ends: 882461 [2023-12-20 02:52:16,724 INFO L226 Difference]: Without dead ends: 510205 [2023-12-20 02:52:17,079 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 [2023-12-20 02:52:17,080 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 [2023-12-20 02:52:17,080 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] [2023-12-20 02:52:18,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510205 states. [2023-12-20 02:52:22,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510205 to 404417. [2023-12-20 02:52:22,790 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) [2023-12-20 02:52:23,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404417 states to 404417 states and 548668 transitions. [2023-12-20 02:52:23,925 INFO L78 Accepts]: Start accepts. Automaton has 404417 states and 548668 transitions. Word has length 79 [2023-12-20 02:52:23,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:52:23,927 INFO L495 AbstractCegarLoop]: Abstraction has 404417 states and 548668 transitions. [2023-12-20 02:52:23,927 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) [2023-12-20 02:52:23,927 INFO L276 IsEmpty]: Start isEmpty. Operand 404417 states and 548668 transitions. [2023-12-20 02:52:23,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-20 02:52:23,942 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:52:23,943 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] [2023-12-20 02:52:23,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-20 02:52:23,943 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:52:23,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:52:23,969 INFO L85 PathProgramCache]: Analyzing trace with hash -361972062, now seen corresponding path program 1 times [2023-12-20 02:52:23,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:52:23,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127160327] [2023-12-20 02:52:23,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:52:23,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:52:23,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:52:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 02:52:24,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:52:24,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127160327] [2023-12-20 02:52:24,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127160327] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 02:52:24,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 02:52:24,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 02:52:24,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823739032] [2023-12-20 02:52:24,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 02:52:24,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 02:52:24,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:52:24,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 02:52:24,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 02:52:24,023 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) [2023-12-20 02:52:27,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:52:27,203 INFO L93 Difference]: Finished difference Result 978681 states and 1325264 transitions. [2023-12-20 02:52:27,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 02:52:27,203 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 [2023-12-20 02:52:27,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:52:28,134 INFO L225 Difference]: With dead ends: 978681 [2023-12-20 02:52:28,134 INFO L226 Difference]: Without dead ends: 574376 [2023-12-20 02:52:28,625 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 [2023-12-20 02:52:28,625 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 [2023-12-20 02:52:28,625 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] [2023-12-20 02:52:29,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574376 states. [2023-12-20 02:52:34,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574376 to 570918. [2023-12-20 02:52:34,724 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) [2023-12-20 02:52:37,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570918 states to 570918 states and 767486 transitions. [2023-12-20 02:52:37,570 INFO L78 Accepts]: Start accepts. Automaton has 570918 states and 767486 transitions. Word has length 81 [2023-12-20 02:52:37,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:52:37,571 INFO L495 AbstractCegarLoop]: Abstraction has 570918 states and 767486 transitions. [2023-12-20 02:52:37,571 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) [2023-12-20 02:52:37,571 INFO L276 IsEmpty]: Start isEmpty. Operand 570918 states and 767486 transitions. [2023-12-20 02:52:37,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-20 02:52:37,590 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:52:37,590 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] [2023-12-20 02:52:37,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-20 02:52:37,591 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:52:37,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:52:37,592 INFO L85 PathProgramCache]: Analyzing trace with hash 224069789, now seen corresponding path program 1 times [2023-12-20 02:52:37,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:52:37,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555339085] [2023-12-20 02:52:37,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:52:37,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:52:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:52:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:52:37,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:52:37,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555339085] [2023-12-20 02:52:37,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555339085] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 02:52:37,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104039028] [2023-12-20 02:52:37,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:52:37,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 02:52:37,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 02:52:37,777 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) [2023-12-20 02:52:37,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 02:52:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:52:37,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 02:52:37,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 02:52:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:52:38,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 02:52:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:52:38,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104039028] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 02:52:38,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 02:52:38,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-12-20 02:52:38,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590946112] [2023-12-20 02:52:38,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 02:52:38,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-20 02:52:38,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:52:38,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-20 02:52:38,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-12-20 02:52:38,277 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) [2023-12-20 02:52:43,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:52:43,610 INFO L93 Difference]: Finished difference Result 1347978 states and 1813084 transitions. [2023-12-20 02:52:43,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-20 02:52:43,610 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 [2023-12-20 02:52:43,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:52:45,528 INFO L225 Difference]: With dead ends: 1347978 [2023-12-20 02:52:45,528 INFO L226 Difference]: Without dead ends: 970267 [2023-12-20 02:52:45,783 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 [2023-12-20 02:52:45,783 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 [2023-12-20 02:52:45,784 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] [2023-12-20 02:52:46,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970267 states. [2023-12-20 02:52:53,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970267 to 573523. [2023-12-20 02:52:54,342 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) [2023-12-20 02:52:57,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573523 states to 573523 states and 775910 transitions. [2023-12-20 02:52:57,097 INFO L78 Accepts]: Start accepts. Automaton has 573523 states and 775910 transitions. Word has length 81 [2023-12-20 02:52:57,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:52:57,097 INFO L495 AbstractCegarLoop]: Abstraction has 573523 states and 775910 transitions. [2023-12-20 02:52:57,097 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) [2023-12-20 02:52:57,097 INFO L276 IsEmpty]: Start isEmpty. Operand 573523 states and 775910 transitions. [2023-12-20 02:52:57,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-20 02:52:57,111 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:52:57,111 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] [2023-12-20 02:52:57,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 02:52:57,316 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 [2023-12-20 02:52:57,316 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:52:57,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:52:57,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1459630910, now seen corresponding path program 1 times [2023-12-20 02:52:57,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:52:57,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800877130] [2023-12-20 02:52:57,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:52:57,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:52:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:52:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 02:52:57,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:52:57,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800877130] [2023-12-20 02:52:57,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800877130] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 02:52:57,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 02:52:57,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 02:52:57,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460021191] [2023-12-20 02:52:57,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 02:52:57,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 02:52:57,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:52:57,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 02:52:57,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 02:52:57,421 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) [2023-12-20 02:53:02,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:53:02,117 INFO L93 Difference]: Finished difference Result 1365021 states and 1843816 transitions. [2023-12-20 02:53:02,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 02:53:02,118 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 [2023-12-20 02:53:02,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:53:03,883 INFO L225 Difference]: With dead ends: 1365021 [2023-12-20 02:53:03,883 INFO L226 Difference]: Without dead ends: 791676 [2023-12-20 02:53:04,271 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 [2023-12-20 02:53:04,272 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 [2023-12-20 02:53:04,273 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] [2023-12-20 02:53:04,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791676 states. [2023-12-20 02:53:13,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791676 to 787053. [2023-12-20 02:53:13,683 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) [2023-12-20 02:53:16,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787053 states to 787053 states and 1055564 transitions. [2023-12-20 02:53:16,273 INFO L78 Accepts]: Start accepts. Automaton has 787053 states and 1055564 transitions. Word has length 81 [2023-12-20 02:53:16,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:53:16,273 INFO L495 AbstractCegarLoop]: Abstraction has 787053 states and 1055564 transitions. [2023-12-20 02:53:16,273 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) [2023-12-20 02:53:16,273 INFO L276 IsEmpty]: Start isEmpty. Operand 787053 states and 1055564 transitions. [2023-12-20 02:53:16,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-20 02:53:16,288 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:53:16,288 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] [2023-12-20 02:53:16,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-20 02:53:16,288 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:53:16,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:53:16,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1962675737, now seen corresponding path program 1 times [2023-12-20 02:53:16,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:53:16,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142406552] [2023-12-20 02:53:16,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:53:16,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:53:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:53:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:53:16,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:53:16,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142406552] [2023-12-20 02:53:16,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142406552] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 02:53:16,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766175145] [2023-12-20 02:53:16,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:53:16,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 02:53:16,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 02:53:16,355 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) [2023-12-20 02:53:16,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 02:53:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:53:16,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 02:53:16,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 02:53:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:53:16,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 02:53:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:53:16,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766175145] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 02:53:16,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 02:53:16,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-12-20 02:53:16,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996253195] [2023-12-20 02:53:16,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 02:53:16,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-20 02:53:16,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:53:16,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-20 02:53:16,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-12-20 02:53:16,711 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) [2023-12-20 02:53:24,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:53:24,376 INFO L93 Difference]: Finished difference Result 1947447 states and 2598268 transitions. [2023-12-20 02:53:24,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-20 02:53:24,378 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 [2023-12-20 02:53:24,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:53:27,693 INFO L225 Difference]: With dead ends: 1947447 [2023-12-20 02:53:27,693 INFO L226 Difference]: Without dead ends: 1381722 [2023-12-20 02:53:28,008 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 [2023-12-20 02:53:28,010 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, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 02:53:28,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2432 Valid, 354 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 02:53:29,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381722 states. [2023-12-20 02:53:40,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381722 to 843849. [2023-12-20 02:53:41,660 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) [2023-12-20 02:53:45,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843849 states to 843849 states and 1131756 transitions. [2023-12-20 02:53:45,687 INFO L78 Accepts]: Start accepts. Automaton has 843849 states and 1131756 transitions. Word has length 81 [2023-12-20 02:53:45,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:53:45,688 INFO L495 AbstractCegarLoop]: Abstraction has 843849 states and 1131756 transitions. [2023-12-20 02:53:45,688 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) [2023-12-20 02:53:45,688 INFO L276 IsEmpty]: Start isEmpty. Operand 843849 states and 1131756 transitions. [2023-12-20 02:53:45,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-20 02:53:45,719 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:53:45,726 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] [2023-12-20 02:53:45,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 02:53:45,933 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 [2023-12-20 02:53:45,935 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:53:45,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:53:45,936 INFO L85 PathProgramCache]: Analyzing trace with hash 716743349, now seen corresponding path program 1 times [2023-12-20 02:53:45,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:53:45,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245052901] [2023-12-20 02:53:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:53:45,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:53:45,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:53:46,047 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:53:46,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:53:46,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245052901] [2023-12-20 02:53:46,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245052901] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 02:53:46,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 02:53:46,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 02:53:46,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879790332] [2023-12-20 02:53:46,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 02:53:46,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 02:53:46,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:53:46,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 02:53:46,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 02:53:46,049 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) [2023-12-20 02:53:52,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:53:52,495 INFO L93 Difference]: Finished difference Result 1452804 states and 1939210 transitions. [2023-12-20 02:53:52,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 02:53:52,500 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 [2023-12-20 02:53:52,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:53:54,208 INFO L225 Difference]: With dead ends: 1452804 [2023-12-20 02:53:54,209 INFO L226 Difference]: Without dead ends: 609157 [2023-12-20 02:53:54,786 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 [2023-12-20 02:53:54,786 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 [2023-12-20 02:53:54,786 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] [2023-12-20 02:53:55,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609157 states. [2023-12-20 02:54:01,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609157 to 608912. [2023-12-20 02:54:02,060 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) [2023-12-20 02:54:03,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608912 states to 608912 states and 798589 transitions. [2023-12-20 02:54:03,488 INFO L78 Accepts]: Start accepts. Automaton has 608912 states and 798589 transitions. Word has length 83 [2023-12-20 02:54:03,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:54:03,488 INFO L495 AbstractCegarLoop]: Abstraction has 608912 states and 798589 transitions. [2023-12-20 02:54:03,488 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) [2023-12-20 02:54:03,488 INFO L276 IsEmpty]: Start isEmpty. Operand 608912 states and 798589 transitions. [2023-12-20 02:54:03,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-20 02:54:03,520 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:54:03,520 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] [2023-12-20 02:54:03,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-12-20 02:54:03,520 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:54:03,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:54:03,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1669724562, now seen corresponding path program 1 times [2023-12-20 02:54:03,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:54:03,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464258420] [2023-12-20 02:54:03,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:54:03,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:54:03,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:54:04,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:54:04,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:54:04,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464258420] [2023-12-20 02:54:04,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464258420] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 02:54:04,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460395242] [2023-12-20 02:54:04,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:54:04,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 02:54:04,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 02:54:04,038 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) [2023-12-20 02:54:04,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 02:54:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:54:04,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 02:54:04,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 02:54:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:54:04,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 02:54:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:54:04,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460395242] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 02:54:04,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 02:54:04,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-12-20 02:54:04,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076983377] [2023-12-20 02:54:04,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 02:54:04,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-20 02:54:04,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:54:04,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-20 02:54:04,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-12-20 02:54:04,421 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) [2023-12-20 02:54:08,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:54:08,823 INFO L93 Difference]: Finished difference Result 1329886 states and 1738641 transitions. [2023-12-20 02:54:08,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-20 02:54:08,823 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 [2023-12-20 02:54:08,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:54:11,389 INFO L225 Difference]: With dead ends: 1329886 [2023-12-20 02:54:11,389 INFO L226 Difference]: Without dead ends: 1085116 [2023-12-20 02:54:11,587 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 [2023-12-20 02:54:11,588 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, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 02:54:11,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2547 Valid, 335 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 02:54:12,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085116 states. [2023-12-20 02:54:21,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085116 to 663293. [2023-12-20 02:54:21,905 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) [2023-12-20 02:54:23,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663293 states to 663293 states and 869405 transitions. [2023-12-20 02:54:23,731 INFO L78 Accepts]: Start accepts. Automaton has 663293 states and 869405 transitions. Word has length 84 [2023-12-20 02:54:23,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:54:23,731 INFO L495 AbstractCegarLoop]: Abstraction has 663293 states and 869405 transitions. [2023-12-20 02:54:23,731 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) [2023-12-20 02:54:23,731 INFO L276 IsEmpty]: Start isEmpty. Operand 663293 states and 869405 transitions. [2023-12-20 02:54:23,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-20 02:54:23,743 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:54:23,744 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] [2023-12-20 02:54:23,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 02:54:23,948 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 [2023-12-20 02:54:23,948 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:54:23,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:54:23,949 INFO L85 PathProgramCache]: Analyzing trace with hash 343188138, now seen corresponding path program 1 times [2023-12-20 02:54:23,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:54:23,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155199740] [2023-12-20 02:54:23,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:54:23,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:54:23,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:54:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-20 02:54:23,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:54:23,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155199740] [2023-12-20 02:54:23,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155199740] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 02:54:23,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 02:54:23,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 02:54:23,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815590189] [2023-12-20 02:54:24,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 02:54:24,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 02:54:24,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:54:24,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 02:54:24,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 02:54:24,000 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) [2023-12-20 02:54:28,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:54:28,649 INFO L93 Difference]: Finished difference Result 1268873 states and 1665470 transitions. [2023-12-20 02:54:28,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 02:54:28,650 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 [2023-12-20 02:54:28,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:54:30,098 INFO L225 Difference]: With dead ends: 1268873 [2023-12-20 02:54:30,098 INFO L226 Difference]: Without dead ends: 606634 [2023-12-20 02:54:30,991 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 [2023-12-20 02:54:30,991 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 [2023-12-20 02:54:30,991 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] [2023-12-20 02:54:31,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606634 states. [2023-12-20 02:54:37,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606634 to 581011. [2023-12-20 02:54:38,114 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) [2023-12-20 02:54:39,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581011 states to 581011 states and 753887 transitions. [2023-12-20 02:54:39,707 INFO L78 Accepts]: Start accepts. Automaton has 581011 states and 753887 transitions. Word has length 85 [2023-12-20 02:54:39,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:54:39,707 INFO L495 AbstractCegarLoop]: Abstraction has 581011 states and 753887 transitions. [2023-12-20 02:54:39,708 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) [2023-12-20 02:54:39,708 INFO L276 IsEmpty]: Start isEmpty. Operand 581011 states and 753887 transitions. [2023-12-20 02:54:39,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-20 02:54:39,717 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:54:39,718 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] [2023-12-20 02:54:39,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-12-20 02:54:39,718 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:54:39,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:54:39,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1524507388, now seen corresponding path program 1 times [2023-12-20 02:54:39,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:54:39,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210084951] [2023-12-20 02:54:39,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:54:39,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:54:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:54:39,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:54:39,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:54:39,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210084951] [2023-12-20 02:54:39,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210084951] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 02:54:39,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93160679] [2023-12-20 02:54:39,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:54:39,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 02:54:39,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 02:54:39,885 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) [2023-12-20 02:54:39,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 02:54:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:54:39,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 02:54:39,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 02:54:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:54:40,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 02:54:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:54:40,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93160679] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 02:54:40,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 02:54:40,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-12-20 02:54:40,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125404999] [2023-12-20 02:54:40,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 02:54:40,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-20 02:54:40,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:54:40,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-20 02:54:40,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-12-20 02:54:40,195 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) [2023-12-20 02:54:45,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:54:45,096 INFO L93 Difference]: Finished difference Result 1350806 states and 1747384 transitions. [2023-12-20 02:54:45,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-20 02:54:45,096 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 [2023-12-20 02:54:45,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:54:47,755 INFO L225 Difference]: With dead ends: 1350806 [2023-12-20 02:54:47,755 INFO L226 Difference]: Without dead ends: 844012 [2023-12-20 02:54:48,278 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 [2023-12-20 02:54:48,278 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 [2023-12-20 02:54:48,280 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] [2023-12-20 02:54:49,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844012 states. [2023-12-20 02:54:56,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844012 to 590069. [2023-12-20 02:54:56,938 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) [2023-12-20 02:54:58,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590069 states to 590069 states and 761434 transitions. [2023-12-20 02:54:58,644 INFO L78 Accepts]: Start accepts. Automaton has 590069 states and 761434 transitions. Word has length 85 [2023-12-20 02:54:58,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:54:58,644 INFO L495 AbstractCegarLoop]: Abstraction has 590069 states and 761434 transitions. [2023-12-20 02:54:58,644 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) [2023-12-20 02:54:58,644 INFO L276 IsEmpty]: Start isEmpty. Operand 590069 states and 761434 transitions. [2023-12-20 02:54:58,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-20 02:54:58,653 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:54:58,654 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] [2023-12-20 02:54:58,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 02:54:58,858 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 [2023-12-20 02:54:58,860 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:54:58,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:54:58,860 INFO L85 PathProgramCache]: Analyzing trace with hash -2083007958, now seen corresponding path program 1 times [2023-12-20 02:54:58,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:54:58,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598850250] [2023-12-20 02:54:58,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:54:58,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:54:58,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:54:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:54:59,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:54:59,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598850250] [2023-12-20 02:54:59,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598850250] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 02:54:59,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176457996] [2023-12-20 02:54:59,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:54:59,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 02:54:59,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 02:54:59,079 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) [2023-12-20 02:54:59,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 02:54:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:54:59,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-20 02:54:59,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 02:54:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:54:59,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 02:55:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:55:00,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176457996] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 02:55:00,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 02:55:00,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-12-20 02:55:00,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431088124] [2023-12-20 02:55:00,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 02:55:00,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-20 02:55:00,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:55:00,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-20 02:55:00,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-12-20 02:55:00,163 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) [2023-12-20 02:55:09,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 02:55:09,212 INFO L93 Difference]: Finished difference Result 2356351 states and 3019704 transitions. [2023-12-20 02:55:09,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-20 02:55:09,213 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 [2023-12-20 02:55:09,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 02:55:14,921 INFO L225 Difference]: With dead ends: 2356351 [2023-12-20 02:55:14,921 INFO L226 Difference]: Without dead ends: 2080940 [2023-12-20 02:55:15,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2023-12-20 02:55:15,291 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 2707 mSDsluCounter, 2267 mSDsCounter, 0 mSdLazyCounter, 1809 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2023-12-20 02:55:15,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2707 Valid, 2523 Invalid, 1823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1809 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-20 02:55:17,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080940 states. [2023-12-20 02:55:32,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080940 to 873070. [2023-12-20 02:55:34,186 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) [2023-12-20 02:55:38,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873070 states to 873070 states and 1123975 transitions. [2023-12-20 02:55:38,241 INFO L78 Accepts]: Start accepts. Automaton has 873070 states and 1123975 transitions. Word has length 85 [2023-12-20 02:55:38,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 02:55:38,241 INFO L495 AbstractCegarLoop]: Abstraction has 873070 states and 1123975 transitions. [2023-12-20 02:55:38,241 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) [2023-12-20 02:55:38,241 INFO L276 IsEmpty]: Start isEmpty. Operand 873070 states and 1123975 transitions. [2023-12-20 02:55:38,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-20 02:55:38,252 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 02:55:38,252 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] [2023-12-20 02:55:38,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 02:55:38,459 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 [2023-12-20 02:55:38,459 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 02:55:38,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 02:55:38,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1374286566, now seen corresponding path program 1 times [2023-12-20 02:55:38,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 02:55:38,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027475532] [2023-12-20 02:55:38,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:55:38,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 02:55:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:55:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:55:38,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 02:55:38,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027475532] [2023-12-20 02:55:38,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027475532] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 02:55:38,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514959592] [2023-12-20 02:55:38,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 02:55:38,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 02:55:38,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 02:55:38,768 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) [2023-12-20 02:55:38,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 02:55:38,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 02:55:38,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-20 02:55:38,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 02:55:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:55:39,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 02:55:40,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 02:55:40,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514959592] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 02:55:40,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 02:55:40,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-12-20 02:55:40,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125739594] [2023-12-20 02:55:40,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 02:55:40,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-20 02:55:40,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 02:55:40,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-20 02:55:40,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-12-20 02:55:40,075 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)